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Silverlight 6 Hosting UK - HostForLIFE.eu :: How to fixed Silverlight Control Content always null from Javascript Access?

clock February 13, 2019 11:09 by author Peter

Today, I am going to show you how to fixed Silverlight 6 Control Content always null from Javascript Access. I got an Error when  I try to access the Silverlight object from the client side. Here’s the following snippet code from client site.

function search() {
            try {
                var silverLightControl = document.getElementById("silverlightControl");
                silverLightControl.Content.Page.SetUser(document.getElementById("txtUser").value);
            } catch (e) {
                alert(e.description);
            }
        }

The page with silverlight object embedded
    <div id="silverlightControl">
        <object data="data:application/x-silverlight-2," type="application/x-silverlight-2" width="100%" height="100%">
          <param name="source" value="ClientBin/SLAspxCommunication.xap"/>
          <param name="onError" value="onSilverlightError" />
          <param name="background" value="white" />
          <param name="minRuntimeVersion" value="5.0.61118.0" />
          <param name="autoUpgrade" value="true" />
          <a href="http://go.microsoft.com/fwlink/?LinkID=149156&v=5.0.61118.0" style="text-decoration:none">
               <img src="http://go.microsoft.com/fwlink/?LinkId=161376" alt="Get Microsoft Silverlight" style="border-style:none"/>
          </a>
        </object><iframe id="_sl_historyFrame" style="visibility:hidden;height:0px;width:0px;border:0px"></iframe></div>


At the silverlight object class,  we have registered the page as javascriptable object with following line

HtmlPage.RegisterScriptableObject("Page", this);

public MainPage()
        {
            InitializeComponent();
            _users = GenerateList();
            HtmlPage.RegisterScriptableObject("Page", this);
        }


The function looks simple that I just want to call the Silverlight function to search the user, unfortunately. This error message below always popped up.

When I debug the process, it indicate that the control did not contain a Content element.  This Error
var silverLightControl = document.getElementById("silverlightControl");

It will load the Div Control instead of the object container that host the silverlight object.  After I set the id to be silverlightControl for the object tag. then  search function funtion well and access the SetUser function in the silverlight object.
   <div>
        <object data="data:application/x-silverlight-2," type="application/x-silverlight-2" width="100%" height="100%" id="silverlightControl">
          <param name="source" value="ClientBin/SLAspxCommunication.xap"/>
          <param name="onError" value="onSilverlightError" />
          <param name="background" value="white" />
          <param name="minRuntimeVersion" value="5.0.61118.0" />
          <param name="autoUpgrade" value="true" />
          <a href="http://go.microsoft.com/fwlink/?LinkID=149156&v=5.0.61118.0" style="text-decoration:none">
               <img src="http://go.microsoft.com/fwlink/?LinkId=161376" alt="Get Microsoft Silverlight" style="border-style:none"/>
          </a>
        </object><iframe id="_sl_historyFrame" style="visibility:hidden;height:0px;width:0px;border:0px"></iframe></div>

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Silverlight 6 Hosting Netherland - HostForLIFE.eu :: How to Display a Pop Up Layer in Web Page using Silverlight

clock January 25, 2019 11:55 by author Peter

In this tutorial, you will learn how to show a non-annoying popup layer within a Silverlight web page.

Let's follow these steps:

Step 1

Add a button to your xaml page as shown below:

<Grid x:Name="LayoutRoot" Background="White" >
<Button Width="100" Height="50" x:Name="showPopup"
Click="showPopup_Click" Content="Show Popup" />
</Grid>

Step 2

Then, add the following code to your code behind file (page.xaml.cs):

Popup p = new Popup();
private void showPopup_Click(object sender, RoutedEventArgs e)
{

1. Create a panel control to host other controls
    StackPanel panel1 = new StackPanel();
    panel1.Background = new SolidColorBrush(Colors.Gray);

2. Create a button
    Button button1 = new Button();
    button1.Content = "Close";
    button1.Margin = new Thickness(5.0);
    button1.Click += new RoutedEventHandler(button1_Click);

3. Create a text label
    TextBlock textblock1 = new TextBlock();
    Textblock1.Text = "The popup control";
    Textblock1.Margin = new Thickness(5.0);

4. Add text label and button to the panel
    panel1.Children.Add(textblock1);
    panel1.Children.Add(button1);

Step 3

Now, make the panel a child of the popup so that the panel will be shown within the Popup when displayed:

   p.Child = panel1;

And you can set a position:

 p.VerticalOffset = 25;
   p.HorizontalOffset = 25;

Use this code to show the popup:

p.IsOpen = true;
}

void button1_Click(object sender, RoutedEventArgs e)
{

Then, to close the popup, follow this code:

// Close the popup.
   p.IsOpen = false;
}

Step 4

Now run the application. You can see the page with a button. When you click on the button, a popup layer will appear with a text label and a button in it. When you click on the button in the popup, it will close the popup.

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Silverlight 6 Hosting UK - HostForLIFE.eu :: INotifyPropertyChanged in Silverlight

clock January 9, 2019 11:35 by author Peter

Data binding is one of the coolest gimmicks that have ever existed in Silverlight. Binding a UI Element's property with a property in the code behind, has the ability to do any sort of trap. It's wizardry, basically. Once the properties are bound, we have to continue telling the UI if the property's estimation has been adjusted in the code. INotifyPropertyChanged is helpful for this.

You see, since it is an interface, we have to first actualize it. The procedure is not exceptionally extreme however. In the new Silverlight project, here is the code of my main page:
publicpartialclassMainPage : UserControl
{
    privatestring _names; 
    publicstring Names
    {
        get
        {
           return _names;
        }
        set
        {
            _names = value;
        }
   } 
    public MainPage()
    {
        InitializeComponent();
    } 
    privatevoid MainPage_OnLoaded(object sender, RoutedEventArgs e)
    {
        Names = "This is the Text";
    }
}


The property "Name" I have here is bound with the textblock in XAML. Now write the following code:
<UserControlx:Class="PropertyChangedDescribed.MainPage"
 xmlns=http://schemas.microsoft.com/winfx/2006/xaml/presentation
 xmlns:x=http://schemas.microsoft.com/winfx/2006/xaml
 xmlns:d=http://schemas.microsoft.com/expression/blend/2008
 xmlns:mc=http://schemas.openxmlformats.org/markup-compatibility/2006
  mc:Ignorable="d"
 Loaded="MainPage_OnLoaded"
 x:Name="TestingPropertyChanged"
 d:DesignHeight="300"d:DesignWidth="400">
 <Gridx:Name="LayoutRoot"Background="White">
  <TextBlockText="{Binding Names, ElementName=TestingPropertyChanged}"/>
  </Grid>
</UserControl>

As should be obvious, the textblock has its "text" property bound with our code behind's property "Name". At this moment, regardless of what you set the estimation of "Name", it will never be reflected onto the UI. Thus, what we need is, each time we change the estimation of our property "Name," the content piece has its esteem changed as well. To do this, we have to actualize the interface INotifyPropertyChanged. Here is the changed primary page's code to do as such:
publicpartialclassMainPage : UserControl, INotifyPropertyChanged
{
    privatestring _names;
     publicstring Names
    {
        get
        {
            return _names;
        }
        set
        {
            _names = value;
            OnPropertyChanged("Names");
        }
    } 
    public MainPage()
    {
        InitializeComponent();
    } 
    privatevoid MainPage_OnLoaded(object sender, RoutedEventArgs e)
    {
        Names = "This is the Text";
    } 
    publicevent PropertyChangedEventHandler PropertyChanged;
     privatevoid OnPropertyChanged(string propertyName)
    {
        if (this.PropertyChanged != null)
        {
            PropertyChanged(this,new PropertyChangedEventArgs(propertyName));
        }
    }
}

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Silverlight 6 Hosting - HostForLIFE.eu :: How to Create Pop Up Notifications

clock October 15, 2015 17:11 by author Rebecca

In this post, I will tell you how to create pop up notification in Silverlight. I will separate the kinds of notification into: Alert, Prompt and Confirm popup box.

There is a class called System.Windows.Browsers that comes with Silverlight. Also, there are lots of methods to create alert, prompt and confirm box using JavaScript. Let’s look further into each notification one by one:

1. Alert

HtmlPage.Window.Alert("Alert from Silverlight screen");

Same thing can be achieved using the Silverlight MessageBox. The only difference is that in case of MessageBox, you don't have the alert symbol. But at the same time with MessageBox you have the option to display appropriate title for the pop up.

MessageBox.Show("MessageBox for Silverlight", "AlertMessageBox", MessageBoxButton.OK)

2. Confirm

HtmlPage.Window.Confirm("Do you know how to call Alert from Silverlight");

The confirm method returns bool value, this can be used to perfrom further action depending upon if user clicks OK or Cancel button. Below code display how to handle the same.

bool isConfirmed = HtmlPage.Window.Confirm("Do you know how to call Alert from Silverlight");

if (isConfirmed)

 {

   //Perform some action;

 }
This thing can also be achieved using the Silverlight MessageBox. The only difference is that in case of MessageBox return type is not bool but Enum of type MessageBoxResult. Also the 3rd parameter which is of enum type MessageBoxButton should be MessageBoxButton.OkCancel

MessageBox.Show("MessageBox for Silverlight", "AlertMessageBox", MessageBoxButton.OKCancel);

MessageBoxResult isConfirmed = MessageBox.Show("MessageBox for Silverlight", "Alert MessageBox", MessageBoxButton.OKCancel);

if (isConfirmed == MessageBoxResult.OK)

 {

   //Perfrom some Action;

 }

3. Prompt

HtmlPage.Window.Prompt("whatis name of site?");

Prompt method returns string method. The input provided can be used to perform further action

string inputValue = HtmlPage.Window.Prompt("what is name of site?");

if (inputValue.Trim() == "Experts Comment")

 {

   //Perfrom some action;

 }


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Silverlight 6 Hosting - HostForLIFE.eu :: How to Create a Similar List like Mac using Silverlight

clock October 8, 2015 13:09 by author Rebecca

In this tutorial, we will create the standard Silverlight ListBox will be customized to be functionally similar to a ListBox you would find on a Mac.

The XAML for this tutorial contains a custom style that we use to disable the scrollbar:

<UserControl x:Class="CustomListBox.Page"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Width="400" Height="300">
    <Grid x:Name="LayoutRoot" Background="White">
        <Grid.Resources>
            <Style x:Key="ListBoxStyle1" TargetType="ListBox">
                <Setter Property="Template">
                    <Setter.Value>
                        <ControlTemplate TargetType="ListBox">
                            <Grid x:Name="LayoutRoot">
                                <Border Padding="5" BorderBrush="#000000" BorderThickness="1" Background="#ffffff" CornerRadius="0">
                                    <ScrollViewer x:Name="ScrollViewer" VerticalScrollBarVisibility="Hidden" Padding="{TemplateBinding Padding}" Background="{TemplateBinding Background}" BorderBrush="Transparent" BorderThickness="0">
                                        <ItemsPresenter />
                                    </ScrollViewer>
                                </Border>
                            </Grid>
                        </ControlTemplate>
                    </Setter.Value>
                </Setter>
            </Style>
        </Grid.Resources>
        <StackPanel Margin="4" HorizontalAlignment="Left">
            <RepeatButton Width="200" Height="22" Click="Up_Click">
                <Polygon Points="5,0 10,10 0,10 5,0" Fill="#222222" />
            </RepeatButton>
            <ListBox x:Name="listbox" Width="200" Height="150" Style="{StaticResource ListBoxStyle1}">
                <ListBoxItem Content="Item 1" />
                <ListBoxItem Content="Item 2" />
                <ListBoxItem Content="Item 3" />
                <ListBoxItem Content="Item 4" />
                <ListBoxItem Content="Item 5" />
                <ListBoxItem Content="Item 6" />
                <ListBoxItem Content="Item 7" />
                <ListBoxItem Content="Item 8" />
                <ListBoxItem Content="Item 9" />
                <ListBoxItem Content="Item 10" />
                <ListBoxItem Content="Item 11" />
                <ListBoxItem Content="Item 12" />
            </ListBox>
            <RepeatButton Width="200" Height="22" Click="Down_Click">
                <Polygon Points="5,10 10,0 0,0 5,10" Fill="#222222" />
            </RepeatButton>
        </StackPanel>
    </Grid>
</UserControl>

In XAML, just apply the custom style and populate it with some test data.  There are also two repeat buttons, an up and down that will handle the scrolling for us:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;

namespace CustomListBox
{
    public partial class Page : UserControl
    {
        public Page()
        {
            InitializeComponent();
        }

        private void Up_Click(object sender, RoutedEventArgs e)
        {
            if (listbox.Items.Count > 0)
            {
                int newIndex = listbox.SelectedIndex - 1;

                if (newIndex < 0)
                {
                    newIndex = 0;
                }
                listbox.SelectedIndex = newIndex;
            }
        }

        private void Down_Click(object sender, RoutedEventArgs e)
        {
            if (listbox.Items.Count > 1)
            {
                int newIndex = listbox.SelectedIndex + 1;

                if (newIndex >= listbox.Items.Count)
                {
                    newIndex = listbox.Items.Count - 1;
                }
                listbox.SelectedIndex = newIndex;
            }
        }
    }
}

And now we're done!

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Silverlight 6 Hosting - HostForLIFE.eu :: How to Control Playback in A Video

clock September 17, 2015 11:07 by author Rebecca

Using videos in a Silverlight based application is a very exciting feature. In this article, we will learn how we can control the playback of movie using some coding in code-behind. Let's see how!

Dealing with Automatic Start

By default videos automaticall get started when we run the project, it is distracting feature from the users point of view. To change auto start false, select the video on stage and in properties uncheck the 'AutoPlay' option.

Dealing with Endless Playback

By default, when the video reaches the end then it stops and does not start again. To change such a setting follow the steps:

1. Select the video on stage

2. In Properties, switch the mode from 'Properties' to 'Events'.

3. In the Event list, point to 'MediaEnded' label and type the event handler name (I will be using md_ended_eve) and then press tab to apply it and it automatically switches you to code-behind with a new event.

4. Now type the following code inside event handler:

(intro_wmv).Stop();
(intro_wmv).Play();

In above code 'intro_wmv' is my media fine name.

5. Now test the application.

XAML Code
<Grid
          xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
          xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
          x:Class="SilverlightApplication1.MainPage"
          Width="640" Height="480">
          <MediaElement x:Name="intro_wmv"
          Margin="54,64,104,60"
          Source="/intro.wmv"
          Stretch="Fill"
          MediaEnded="md_ended_eve" AutoPlay="False"/>
</Grid>

XAML.CS Code
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
namespace SilverlightApplication1
{
       public partial class MainPage : Grid
       {
              public MainPage()
              {
                     // Required to initialize variables
                     InitializeComponent();
              }
              private void md_ended_eve(object sender, System.Windows.RoutedEventArgs e)
              {
                     // TODO: Add event handler implementation here.
                     (intro_wmv).Stop();
                     (intro_wmv).Play();
              }
       }
}

Control Video Playback by Pause and Play

By default in Silverlight video plays and we can't control it by pausing and playing. But by writing some lines in code-behind we can control this playback. For this we have to create the event as we saw in above example. Let's follow the steps:

1. Open the event explorer by switching the property (look above image).

2. Type the event name in 'MouseLeftButtonDown', I will be using here 'pause_start_evn' and press tab to switch in event handler mode.

3. In the appeared event type the following code:

private bool IsPaused=true;
private void pause_start_evn(object sender, System.Windows.Input.MouseButtonEventArgs e)
              {
                     // TODO: Add event handler implementation here.
                     if(IsPaused)
                     {
                           (intro_wmv as MediaElement).Play();
                           IsPaused=false;
                     }
                     else
                     {
                           (intro_wmv as MediaElement).Pause();
                           IsPaused=true;
                     }
   }

4. Now test the application and check by right mouse click on video surface.

XAML Code
<Grid
          xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
          xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
          x:Class="SilverlightApplication1.MainPage"
          Width="640" Height="480">
          <MediaElement x:Name="intro_wmv"
          Margin="54,64,104,60"
          Source="/intro.wmv"
          Stretch="Fill"
          MediaEnded="md_ended_eve"
          MouseLeftButtonDown="pause_start_evn"/>
</Grid>

XAXM.CS Code

using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;

namespace SilverlightApplication1
{
       public partial class MainPage : Grid
       {
              public MainPage()
              {
                     // Required to initialize variables
                     InitializeComponent();
              }

              private void md_ended_eve(object sender, System.Windows.RoutedEventArgs e)
              {
                     // TODO: Add event handler implementation here.
                     (intro_wmv).Stop();
                     (intro_wmv).Play();
              }
              private bool IsPaused=true;
              private void pause_start_evn(object sender, System.Windows.Input.MouseButtonEventArgs e)
              {
                     // TODO: Add event handler implementation here.
                     if(IsPaused)
                     {
                           (intro_wmv as MediaElement).Play();
                           IsPaused=false;
                     }
                     else
                     {
                           (intro_wmv as MediaElement).Pause();
                           IsPaused=true;
                     }
              }
       }
}

Now, that's all about the controlling of video playback in a Silverlight based application. Happy coding!

HostForLIFE.eu Silverlight 6 Hosting
HostForLIFE.eu is European Windows Hosting Provider which focuses on Windows Platform only. We deliver on-demand hosting solutions including Shared hosting, Reseller Hosting, Cloud Hosting, Dedicated Servers, and IT as a Service for companies of all sizes. We have customers from around the globe, spread across every continent. We serve the hosting needs of the business and professional, government and nonprofit, entertainment and personal use market segments.



Silverlight 6 Hosting - HostForLIFE.eu :: How to Use ASP.NET to Create Silverlight Clock Apps

clock September 10, 2015 11:37 by author Rebecca

In this post, we will learn how to create Analog Clock completely from code behind using .NET Silverlight.

Step 1

Create a new project in Visual Studio and select "Silverlight Application".

Step 2

Open MainPage.xaml and add the following code:


    <UserControl x:Class="SilverlightAnalogClock.MainPage" 
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
        mc:Ignorable="d" 
        d:DesignHeight="300" d:DesignWidth="400"> 
     
        <Grid x:Name="LayoutRoot" Background="White"> 
            
        </Grid> 
    </UserControl> 

Step 3

Open MainPage.xaml.cs and add the following code:

    using System; 
    using System.Collections.Generic; 
    using System.Linq; 
    using System.Net; 
    using System.Windows; 
    using System.Windows.Controls; 
    using System.Windows.Documents; 
    using System.Windows.Input; 
    using System.Windows.Media; 
    using System.Windows.Media.Animation; 
    using System.Windows.Media.Imaging; 
    using System.Windows.Shapes; 
     
    namespace SilverlightAnalogClock 
    { 
        public partial class MainPage : UserControl 
        { 
     
            public Canvas ClockArea = null; 
            public Rectangle secondHand = null; 
            public Rectangle minuteHand = null; 
            public Rectangle hourHand = null; 
     
            public RotateTransform secondHandRotate = null; 
            public RotateTransform minuteHandRotate = null; 
            public RotateTransform hourHandRotate = null; 
     
            public Ellipse outerCircle = null; 
     
            public Point centerPoint; 
            public double HEIGHT  = 0; 
            public double WIDTH  = 0; 
            public double RADIUS = 0; 
     
            public MainPage() 
            { 
                InitializeComponent(); 
     
                ClockArea = new Canvas() 
                { 
     
                    Width = 300, 
                    Height = 300, 
                    HorizontalAlignment = HorizontalAlignment.Left, 
                    VerticalAlignment = VerticalAlignment.Top 
     
                }; 
     
                ClockArea.SetValue(Grid.RowProperty, 0); 
                ClockArea.SetValue(Grid.ColumnProperty, 0); 
                ClockArea.Margin = new Thickness(0, 0, 0, 0); 
                this.LayoutRoot.Children.Add(ClockArea); 
     
                WIDTH = ClockArea.Width; 
                HEIGHT = ClockArea.Height; 
                centerPoint.X = (WIDTH/2); 
                centerPoint.Y = (HEIGHT/2); 
                      
                RADIUS = 400; 
                DrawClockFace(); 
     
                Point TOPPOINT = new Point(0, 0); 
     
                DrawMinuteHand(); 
                DrawSecondHand(); 
                DrawHourHand(); 
                DrawCenterCircle(); 
     
     
                //Start the Clock 
                ClockStart(); 
                 
     
            } 
     
            public void ClockStart() 
            { 
                // Create and Start the Thread Timer 
                System.Windows.Threading.DispatcherTimer clockTimer = new System.Windows.Threading.DispatcherTimer(); 
                clockTimer.Interval = new TimeSpan(0, 0, 0, 0, 1000); 
                clockTimer.Tick += new EventHandler(Clock_Tick); 
                clockTimer.Start(); 
            } 
     
            // Get and Set the Angles of Each Hand at every Clock Ticks 
            public void Clock_Tick(object o, EventArgs sender) 
            { 
                double hourRotateValue = Convert.ToDouble(DateTime.Now.Hour.ToString()); 
                double minuteRotateValue = Convert.ToDouble(DateTime.Now.Minute.ToString()); 
                double secondRotateValue = Convert.ToDouble(DateTime.Now.Second.ToString()); 
                hourRotateValue = (hourRotateValue + minuteRotateValue / 60) * 30; 
                minuteRotateValue = (minuteRotateValue + secondRotateValue / 60) * 6; 
                secondRotateValue = Convert.ToDouble(DateTime.Now.Second.ToString()) * 6; 
                minuteHandRotate.Angle = minuteRotateValue; 
                hourHandRotate.Angle = hourRotateValue; 
                secondHandRotate.Angle = secondRotateValue; 
            } 
     
            // Draw Center Circle 
            public void DrawCenterCircle() 
            {             
                Ellipse centerCircle = new Ellipse() 
                { 
     
                    Width = 10, 
                    Height = 10, 
                    Stroke = new SolidColorBrush(Colors.Red), 
                    Fill = new SolidColorBrush(Colors.Red), 
                    HorizontalAlignment = HorizontalAlignment.Center, 
                    VerticalAlignment = VerticalAlignment.Center 
     
                }; 
     
                centerCircle.SetValue(Grid.RowProperty, 0); 
                centerCircle.SetValue(Grid.ColumnProperty, 0); 
                Canvas.SetLeft(centerCircle, (WIDTH / 2) - (centerCircle.Width / 2)); 
                Canvas.SetTop(centerCircle, (HEIGHT / 2) - (centerCircle.Height / 2)); 
                ClockArea.Children.Add(centerCircle); 
            } 
     
            // Draw Clock Face 
            public void DrawClockFace() 
            { 
                         
                int smallCircle = 5; 
     
                Color c = Colors.Blue; 
                int p = 0; 
     
                // Draw Shadow of Outer Circle 
                Ellipse outerCircleShadow = new Ellipse() 
                { 
                    Width = (WIDTH), 
                    Height = (WIDTH), 
                    Stroke = new SolidColorBrush(Colors.Gray), 
                    StrokeThickness = 5, 
                    HorizontalAlignment = HorizontalAlignment.Center, 
                    VerticalAlignment = VerticalAlignment.Center 
                     
                }; 
                
                outerCircleShadow.SetValue(Grid.RowProperty, 0); 
                outerCircleShadow.SetValue(Grid.ColumnProperty, 0); 
                Canvas.SetLeft(outerCircleShadow, (WIDTH / 2) - (outerCircleShadow.Width / 2) + 6.5); 
                Canvas.SetTop(outerCircleShadow, (HEIGHT / 2) - (outerCircleShadow.Height / 2) + 6.5); 
                ClockArea.Children.Add(outerCircleShadow); 
                
                //  Draw Outer Circle 
                outerCircle = new Ellipse() 
                { 
                    Width = (WIDTH ), 
                    Height = (WIDTH), 
                    Stroke = new SolidColorBrush(Colors.Black), 
                    StrokeThickness = 5, 
                    HorizontalAlignment = HorizontalAlignment.Center, 
                    VerticalAlignment = VerticalAlignment.Center 
                };             
                outerCircle.SetValue(Grid.RowProperty, 0); 
                outerCircle.SetValue(Grid.ColumnProperty, 0); 
                Canvas.SetLeft(outerCircle, (WIDTH / 2) - (outerCircle.Width / 2) + 4.5); 
                Canvas.SetTop(outerCircle, (HEIGHT / 2) - (outerCircle.Height / 2) + 4.5); 
                ClockArea.Children.Add(outerCircle); 
     
     
                outerCircle.Fill = new LinearGradientBrush() 
                    { 
                        EndPoint = new Point(1, 0), 
                        GradientStops = new GradientStopCollection() 
                        { 
                                new GradientStop() { Color = Colors.White, Offset = 0 }, 
                                new GradientStop() { Color = Colors.Gray, Offset = 0.5 }, 
                                 new GradientStop() { Color = Colors.White, Offset = 1 } 
                        } 
                    }; 
     
                int clockDigits = 3; 
                double rad = (WIDTH/2) - 10.0f; 
                // 60 Innner Dots as Small Circle 
                for (double i = 0.0; i < 360.0; i += 6)  
                {  
     
                double angle = i * System.Math.PI / 180; 
     
                int x = (int)(centerPoint.X + rad * System.Math.Cos(angle)); 
                int y = (int)(centerPoint.Y + rad * System.Math.Sin(angle)); 
     
                if (p % 5 == 0) 
                { 
                    smallCircle = 10; 
                    c = Colors.Orange;                 
                } 
                else 
                { 
                    smallCircle = 5; 
                    c = Colors.Blue; 
                } 
                if (p % 15 == 0) 
                { 
                    TextBlock tb = new TextBlock(); 
                    tb.Text = clockDigits.ToString(); 
                    tb.FontSize = 24; 
                     
                    tb.SetValue(Grid.RowProperty, 0); 
                    tb.SetValue(Grid.ColumnProperty, 0); 
                    Canvas.SetLeft(tb, x ); 
                    Canvas.SetTop(tb, y); 
                    if (clockDigits == 3) 
                    { 
                        Canvas.SetLeft(tb, x - 20); 
                        Canvas.SetTop(tb, y - 10); 
                    } 
                    if (clockDigits == 6) 
                    { 
                        Canvas.SetLeft(tb, x); 
                        Canvas.SetTop(tb, y - 30); 
                    } 
                    if (clockDigits == 9) 
                    { 
                        Canvas.SetLeft(tb, x + 15); 
                        Canvas.SetTop(tb, y - 10); 
                    } 
                    if (clockDigits == 12) 
                    { 
                        Canvas.SetLeft(tb, x - 10); 
                        Canvas.SetTop(tb, y + 5 ); 
                    }  
                   
                     
                    ClockArea.Children.Add(tb); 
                    clockDigits = clockDigits + 3; 
                } 
     
                p++; 
                
                            Ellipse innerPoints = new Ellipse() 
                            { 
                                Width = smallCircle, 
                                Height = smallCircle, 
                                Stroke = new SolidColorBrush(c), 
                                Fill = new SolidColorBrush(c), 
                                HorizontalAlignment = HorizontalAlignment.Center, 
                                VerticalAlignment = VerticalAlignment.Center 
                            }; 
                            innerPoints.SetValue(Grid.RowProperty, 0); 
                            innerPoints.SetValue(Grid.ColumnProperty, 0); 
                            Canvas.SetLeft(innerPoints, x); 
                            Canvas.SetTop(innerPoints, y); 
                            ClockArea.Children.Add(innerPoints); 
     
                } 
     
                 
            } 
            // Draw the Second Hand 
            public void DrawSecondHand() 
            { 
     
                double handLength = (HEIGHT / 2) - 20; 
                secondHand = new Rectangle() 
                { 
                    Width = 1, 
                    Height = handLength, 
                    Stroke = new SolidColorBrush(Colors.Red), 
                    Fill = new SolidColorBrush(Colors.Red), 
                    HorizontalAlignment = HorizontalAlignment.Center, 
                    VerticalAlignment = VerticalAlignment.Center 
                }; 
                 
                secondHand.SetValue(Grid.RowProperty, 0); 
                secondHand.SetValue(Grid.ColumnProperty, 0); 
                //Add Rotate Transformation 
                secondHandRotate = new RotateTransform(); 
                secondHandRotate.Angle = 0; 
                //Set Center for Rotation 
                secondHandRotate.CenterX = Canvas.GetLeft(secondHand); 
                secondHandRotate.CenterY = secondHand.Height; 
                secondHand.RenderTransform = secondHandRotate; 
                //Set Initial Position of Hand 
                Canvas.SetTop(secondHand, centerPoint.Y - handLength); 
                Canvas.SetLeft(secondHand, WIDTH/2);            
                ClockArea.Children.Add(secondHand); 
                
            } 
     
            public void DrawMinuteHand() 
            { 
                double handLength = (HEIGHT / 2) - 50; 
                minuteHand = new Rectangle() 
                { 
                    Width = 4, 
                    Height = handLength, 
                    Stroke = new SolidColorBrush(Colors.Black), 
                    Fill = new SolidColorBrush(Colors.Black), 
                    HorizontalAlignment = HorizontalAlignment.Center, 
                    VerticalAlignment = VerticalAlignment.Center 
                }; 
     
                minuteHand.SetValue(Grid.RowProperty, 0); 
                minuteHand.SetValue(Grid.ColumnProperty, 0); 
     
                minuteHandRotate = new RotateTransform(); 
                minuteHandRotate.Angle = 0; 
                minuteHandRotate.CenterX = Canvas.GetLeft(minuteHand); 
                minuteHandRotate.CenterY = minuteHand.Height; 
                minuteHand.RenderTransform = minuteHandRotate; 
                Canvas.SetTop(minuteHand, centerPoint.Y - handLength); 
                Canvas.SetLeft(minuteHand, WIDTH / 2); 
                ClockArea.Children.Add(minuteHand); 
     
            } 
            public void DrawHourHand() 
            { 
                double handLength = (HEIGHT / 2) - 80; 
                hourHand = new Rectangle() 
                { 
                    Width = 4, 
                    Height = handLength, 
                    Stroke = new SolidColorBrush(Colors.Black), 
                    Fill = new SolidColorBrush(Colors.Black), 
                    HorizontalAlignment = HorizontalAlignment.Center, 
                    VerticalAlignment = VerticalAlignment.Center 
                }; 
     
                hourHand.SetValue(Grid.RowProperty, 0); 
                hourHand.SetValue(Grid.ColumnProperty, 0); 
     
                hourHandRotate = new RotateTransform(); 
                hourHandRotate.Angle = 0; 
                hourHandRotate.CenterX = Canvas.GetLeft(hourHand); 
                hourHandRotate.CenterY = hourHand.Height; 
                hourHand.RenderTransform = hourHandRotate; 
                Canvas.SetTop(hourHand, centerPoint.Y - handLength); 
                Canvas.SetLeft(hourHand, WIDTH / 2);    
                ClockArea.Children.Add(hourHand); 
     
            } 
     
        } 
    } 


The Output

Now execute and you will get a fully drawn Silverlight Analog Clock.


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Silvelight 6 Hosting - HostForLIFE.eu :: How to Move Image or Object in Silverlight ?

clock September 9, 2015 11:55 by author Peter

The control that you just like drag or move with the mouse is embedded among a Border control then handle the mouse down, up and move events to create the object move among your layout panel.

See sample .xaml code:
<Canvas x:Name="LayoutRoot" Background="White">
<Border x:Name="border1"
Canvas.Top="100"
Canvas.Left="10"
MouseLeftButtonDown="border1_MouseLeftButtonDown"
MouseLeftButtonUp="border1_MouseLeftButtonUp"
MouseMove="border1_MouseMove"> 
<Image x:Name="MyImage" Source="images/Basket.png" Stretch="Uniform" ></Image>           
</Border>
</Canvas>


In the above code, a Border control is placed within the Canvas. The foremost necessary code to notice is:
MouseLeftButtonDown="border1_MouseLeftButtonDown"
MouseLeftButtonUp="border1_MouseLeftButtonUp"
MouseMove="border1_MouseMove"


The above lines outline 3 events that we tend to like to handle. because the name indicates, we are handling the mouse button down, mouse button up and mouse move events for the left mouse.

In the code behind, once the left button is pressed, we are going to set a global variable to point that user has started moving. within the mouse move event, we are going to get the current location of the mouse pointer and then set the new position for the border control. once the left mouse button is discharged, we are going to reset the global variable in order that we are going to not move the item from now on.
See the code for the code behind class:
public partial class Page : UserControl
{
// Global variable to indicate if user has clicked border
// and started/stopped moving.
private bool moving = false;
private double offSetX;
private double offSetY;
public Page()
{
InitializeComponent();
}

private void border1_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
// Left mouse button clicked within border. start moving.
moving = true;

Point offset = e.GetPosition(border1);
offSetX = offset.X;
offSetY = offset.Y;
}

private void border1_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
// Left mouse button release. Stop moving.
moving = false;
}

private void border1_MouseMove(object sender, MouseEventArgs e)
{
if (moving)
{
    // Get the new mouse pointer position
    Canvas parent = (Canvas)this.border1.Parent;
    Point p = e.GetPosition(parent);
    double x = p.X - offSetX;
    double y = p.Y - offSetY;
    // Set the new position for the border control.
    this.border1.SetValue(Canvas.LeftProperty, x);
    this.border1.SetValue(Canvas.TopProperty, y);
}
}
}

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Silverlight 6 Hosting France - HostForLIFE.eu :: How to Use C# to Deploy AutoComplete Textbox

clock August 11, 2015 06:59 by author Rebecca

In this article, you will implement an AutoComplete TextBox in Silverlight Applications using C#. An AutoCompleteBox is just a kind of TextBox in which, when you start typing, items that match are displayed in a dropdown list and you can pick an item from the list.

Step 1

Create a New “Silverlight Application” in Visual Studio and name it as you chooce (I named mine AutoCompleteBox). Now a new Silverlight Application Page (MainPage.xaml) will be generated.

Step 2

Now go to the Solution Explorer Window and right-click on "References" and click on "Add Reference".

Step 3

Now an "Add Reference" window will appear. Navigate to the .NET tab and search for System.Windows.Controls.Input reference and add it to your project.

Step 4

Now navigate to the MainPage.xaml portion in your project and add the following code for the reference:

xmlns:sdk="http://schemas.microsoft.com/winfx/2006/xaml/presentation/sdk"

Step 5

A reference is added to your project and now it's time to add the AutoCompleteBox. Navigate to the XAML code and in the Grid tag add the following code:

<sdk:AutoCompleteBox Name="Colors" Width="200" Height="25"/>

An AutoCompleteBox is added to your project (here I named it Colors but it's up to you what to use).

Step 6

Now it's time to add some data in the AutoCompleteBox. To do that navigate to the .cs file of your project MainPage.xaml.cs and add the following code to the MainPage() block:

public MainPage()
{
        InitializeComponent();
        this.Colors.ItemsSource = new string[]
        {
            "Aqua","Azure","Beige","Black","Blue","Brown","Cyan","Gold","Red","Green","Yellow"
        };
}

What we are doing is that we are simply adding the data to the AutoCompleteBox whenever the MainPage is Loaded. I am here adding Name of various colors for demo purposes, you can however add your own data. Now that's all; compile and run your project and whenever you type a letter into the AutoCompleteBox an intellisenese will appear with suggestions the same as you usually see in Visual Studio.

Step 7

Now Suppose you want to Auto fill the suggestions in your AutoCompleteBox; for that you just need to add a property called IsTextCompletionEnabled to True in your XAML code like:

<sdk:AutoCompleteBox Name="Colors" Width="200" Height="25" IsTextCompletionEnabled="True"/>

Now compile and run your project; you will see that whenever you type a letter, the words related to it are automatically placed into the AutoCompleteBox.

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Silverlight 6 Hosting UK - HostForLIFE.eu :: How to Use Silverlight Storyboard to Create Busy Indicator Bar

clock August 4, 2015 07:14 by author Rebecca

The Silverlight toolkit comes with Busy Indicator control, but some time you may need to develop custom Busy Indicator for your application. Here are the steps to create Busy Indicator using Silverlight StoryBoard.

Step 1: Create Silverlight Application

Create Silverlight application and add ProgressBar.xaml user control in your project.

Step 2: Code Progress Bar

Copy and paste below given code ten times and change grid name from circle0 through circle9. This code will be used to generate small filled circles.

<Grid x:Name="circle0" HorizontalAlignment="Center" Margin="0,0,0,0"
                    VerticalAlignment="Center" Opacity="0" RenderTransformOrigin="0.5,0.5">
     <Grid.RenderTransform>
          <TransformGroup>
            <ScaleTransform />
                  <SkewTransform />
                  <RotateTransform />
                  <TranslateTransform X="29" Y="-44" />
          </TransformGroup>
      </Grid.RenderTransform>
      <Ellipse HorizontalAlignment="Center" Margin="0,0,0,0" Width="10"
               RenderTransformOrigin="0.5,0.5" Stroke="{x:Null}" Height="10"
                        VerticalAlignment="Center">
          <Ellipse.Fill>
                   <RadialGradientBrush>
                   <GradientStop Color="#FF000000" />
                   <GradientStop Color="#00000000" Offset="1" />
                   <GradientStop Color="#7F000000" Offset="0.551" />
                   </RadialGradientBrush>
          </Ellipse.Fill>
          <Ellipse.RenderTransform>
                   <TransformGroup>
                   <ScaleTransform />
                   <SkewTransform />
                   <RotateTransform />
                   <TranslateTransform X="2" Y="2" />
                   </TransformGroup>
          </Ellipse.RenderTransform>
       </Ellipse>
       <Ellipse Height="9" HorizontalAlignment="Center" Margin="0,0,0,0"
            Width="9" RenderTransformOrigin="0.5,0.5"   VerticalAlignment="Center" Stroke="{x:Null}">
          <Ellipse.Fill>
                   <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
                   <GradientStop Color="#FF9ED9E7" />
                   <GradientStop Color="#FF67BED9" Offset="1" />
                   </LinearGradientBrush>
          </Ellipse.Fill>
            <Ellipse.RenderTransform>
                  <TransformGroup>
                         <ScaleTransform />
                         <SkewTransform />
                         <RotateTransform />
                         <TranslateTransform X="0" Y="0" />
                  </TransformGroup>
            </Ellipse.RenderTransform>
          </Ellipse>
</Grid>

Step 3: Add  StoryBoard code

Add this StoryBoard in user control resources section. This will start Busy Indicator animation.

<Storyboard x:Name="StartAnimation">
            <DoubleAnimation Storyboard.TargetProperty="(UIElement.Opacity)"
                    Storyboard.TargetName="LayoutRoot" From="0" To="1" Duration="0:0:0.3">
            </DoubleAnimation>
</Storyboard>


Copy and paste below code ten times and change StoryBoard name from ProgressStoryboard0 through ProgressStoryboard9 and StoryBoard TargetName from circle0 through circle9 (you have already declared code for circles above). This code will be used to generate StoryBoard animation for Busy Indicator.

<Storyboard x:Name="ProgressStoryboard0">
            <DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="circle0"
                    Storyboard.TargetProperty="(UIElement.Opacity)">
                <SplineDoubleKeyFrame KeyTime="00:00:00" Value="0" />
                <SplineDoubleKeyFrame KeyTime="00:00:00.0050000" Value="1" />
                <SplineDoubleKeyFrame KeySpline="0,0,0.601999998092651,0.400999993085861"
                        KeyTime="00:00:00.7000000" Value="1" />
                <SplineDoubleKeyFrame KeyTime="00:00:00.7120000" Value="0" />
            </DoubleAnimationUsingKeyFrames>
            <DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="circle0"
                    Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleY)">
                <SplineDoubleKeyFrame KeyTime="00:00:00" Value="1" />
                <SplineDoubleKeyFrame KeyTime="00:00:00.0050000" Value="1" />
                <SplineDoubleKeyFrame KeySpline="0,0,0.601999998092651,0.400999993085861"
                        KeyTime="00:00:00.7000000" Value="0.3" />
                <SplineDoubleKeyFrame KeyTime="00:00:00.7120000" Value="0.30000001192092896" />
            </DoubleAnimationUsingKeyFrames>
            <DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="circle0"
                    Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleX)">
                <SplineDoubleKeyFrame KeyTime="00:00:00" Value="1" />
                <SplineDoubleKeyFrame KeyTime="00:00:00.0050000" Value="1" />
                <SplineDoubleKeyFrame KeySpline="0,0,0.601999998092651,0.400999993085861"
                        KeyTime="00:00:00.7000000" Value="0.3" />
                <SplineDoubleKeyFrame KeyTime="00:00:00.7120000" Value="0.30000001192092896" />
            </DoubleAnimationUsingKeyFrames>
</Storyboard>

Step 4: Add animation start and stop code

Add below code in your ProgressBar.xaml.cs file. This has a dependency property IsActive. When IsActive is set to true the Busy Indicator animation will start and when it is set to false the animation will be stopped.

public partial class ProgressBar : UserControl
{
    private Storyboard storyBoard;
    private List<Storyboard> storyBoardList;
    private int nextStoryBoard;
    public static readonly DependencyProperty IsActiveProperty =
            DependencyProperty.Register("IsActive", typeof(bool), typeof(ProgressBar), new PropertyMetadata(IsActivePropertyChanged));
    public ProgressBar()
    {
          InitializeComponent();
          this.storyBoard = new Storyboard()
          {
                   Duration = new Duration(TimeSpan.FromMilliseconds(100))
          };
           this.storyBoard.Completed += new EventHandler(this.OnIntervalTimerCompleted);
           this.storyBoardList = new List<Storyboard>()
          {
                   ProgressStoryboard0,
                   ProgressStoryboard1,
                   ProgressStoryboard2,
                   ProgressStoryboard3,
                   ProgressStoryboard4,
                   ProgressStoryboard5,
                   ProgressStoryboard6,
                   ProgressStoryboard7,
                   ProgressStoryboard8,
                   ProgressStoryboard9
          };
    }
    public bool IsActive
    {
        get { return (bool)GetValue(IsActiveProperty); }
        set { SetValue(IsActiveProperty, value); }
    }
    private static void IsActivePropertyChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
    {
        var spinControl = sender as ProgressBar;
        if (spinControl != null)
        {
            if ((bool)e.NewValue)
           {
               spinControl.Start();
          }
          else
          {
              spinControl.Stop();
          }
        }
    }
    private void Start()
    {
        this.Visibility = Visibility.Visible;
        StartAnimation.Begin();
        this.storyBoard.Begin();
    }
    private void Stop()
    {
        this.Visibility = Visibility.Collapsed;
        StartAnimation.Stop();
        this.nextStoryBoard = 0;
        this.storyBoard.Stop();
        foreach (var item in this.storyBoardList)
        {
            item.Stop();
        }
    }
    private void OnIntervalTimerCompleted(object sender, EventArgs e)
    {
        this.storyBoardList[nextStoryBoard].Begin();
        this.nextStoryBoard = this.nextStoryBoard > 8 ? 0 : this.nextStoryBoard + 1;
        this.storyBoard.Begin();
    }
}

At this point you have completed coding for BusyIndicator control. Now the next step is implementation to see how exactly it works.

Step 5: Implementing Busy Indicator

To implement and test the above mentioned Busy Indicator, I have added a simple WCF MathService which returns sum of two values supplied to its Add method. The main reason behind choosing WCF service for this example is, this is the most common scenario to implement Busy Indicator.  Add service reference of this service into Silverlight project.MainPage.xaml changes:
Add namespace for Busy Indicator in MainPage.xaml file.

xmlns:progressBar="clr-namespace:CustomProgressBar"

And add below code in the same file.

<Grid x:Name="LayoutRoot" Margin="20,20,20,20">
        <Grid Margin="5,5,5,5">
            <StackPanel HorizontalAlignment="Center">
                <TextBlock x:Name="lblResult" />
                <Button x:Name="btnAdd" Width="100" Content="Add" Click="btnAdd_Click" />
            </StackPanel>
        </Grid>
        <progressBar:ProgressBar x:Name="ProgressBar1" Visibility="Collapsed"/>
</Grid>

You can see in above code, I have placed custom Busy Indicator control in MainPage using below line of code.

<progressBar:ProgressBar x:Name="ProgressBar1" Visibility="Collapsed"/>

MainPage.xaml.cs change: Add below code in this file.

private void btnAdd_Click(object sender, RoutedEventArgs e)
{
    ProgressBar1.IsActive = true;
    MathService.MathServiceClient proxy = new CustomProgressBar.MathService.MathServiceClient();
    proxy.AddCompleted += new EventHandler<CustomProgressBar.MathService.AddCompletedEventArgs>(proxy_AddCompleted);
    proxy.AddAsync(10, 10);
}
void proxy_AddCompleted(object sender, CustomProgressBar.MathService.AddCompletedEventArgs e)
{
    lblResult.Text = e.Result.ToString();
    ProgressBar1.IsActive = false;
}

Here I have added a button with the name "Add", on click of this button I am calling MathService to calculate sum of two given numbers. Once the result is returned from MathService it will be displayed in TextBlock.  On button click event I am setting Progress Bar IsActive property to true, at this moment the Busy Indicator animation will start. And when the Add method completed event is called I am setting IsActive property value to false, to stop the animation.

Step 6: Run the application

Once all the changes are completed run the application. You will see below screen when you click on "Add" button. The good thing is, until the Busy Indicator runs the UI portion of the application will be locked and once the processing is completed screen will be unlocked again.

HostForLIFE.eu Silverlight 6 Hosting
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About HostForLIFE.eu

HostForLIFE.eu is European Windows Hosting Provider which focuses on Windows Platform only. We deliver on-demand hosting solutions including Shared hosting, Reseller Hosting, Cloud Hosting, Dedicated Servers, and IT as a Service for companies of all sizes.

We have offered the latest Windows 2016 Hosting, ASP.NET Core 2.2.1 Hosting, ASP.NET MVC 6 Hosting and SQL 2017 Hosting.


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