Update Data Using Silverlight RIA Enabled ServiceToday, in this article let's play around with one of the interesting and most useful concepts in Silverlight.

Question: What is update data using Silverlight RIA enabled service?
In simple terms "This application enables to update the data in the database with help of Silverlight RIA enabled service. It uses base platform of entity framework to communicate with database".

Step 1: Create a database named "Company" with employee table in it.

Step 2: Open up Visual Studio and create a new Silverlight application enabled with RIA Services
Step 3: When the project is created. Right-click on RIA Service project and add new entity data model framework and set it up for previously created database.
Step 4: Again right click on RIA service project and add Domain Service Class as new item.
Step 5: Complete code of EmployeeDomain.cs looks like this (Domain Service Class)
namespace SilverlightRIAInsert.Web
{
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.ComponentModel.DataAnnotations;
using System.Data;
using System.Linq;
using System.ServiceModel.DomainServices.EntityFramework;
using System.ServiceModel.DomainServices.Hosting;
using System.ServiceModel.DomainServices.Server;
// Implements application logic using the CompanyEntities context.
// TODO: Add your application logic to these methods or in additional methods.
// TODO: Wire up authentication (Windows/ASP.NET Forms) and uncomment the following to disable anonymous access
// Also consider adding roles to restrict access as appropriate.
// [RequiresAuthentication][EnableClientAccess()]
public class EmployeeDomain : LinqToEntitiesDomainService<CompanyEntities>
{
    // TODO:// Consider constraining the results of your query method.  If you need additional input you can
    // add parameters to this method or create additional query methods with different names.
    // To support paging you will need to add ordering to the 'Employee'
    query.public IQueryable<Employee> GetEmployee()
    {
        return this.ObjectContext.Employee;
    }
    public void InsertEmployee(Employee employee)
    {
        if ((employee.EntityState != EntityState.Detached))
        {
            this.ObjectContext.ObjectStateManager.ChangeObjectState(employee, EntityState.Added);
        }
        else{this.ObjectContext.Employee.AddObject(employee);
        }
    }
    public void UpdateEmployee(Employee currentEmployee)
    {
        this.ObjectContext.Employee.AttachAsModified(currentEmployee, this.ChangeSet.GetOriginal(currentEmployee));
    }
    public void DeleteEmployee(Employee employee)
    {
        if ((employee.EntityState != EntityState.Detached))
        {
            this.ObjectContext.ObjectStateManager.ChangeObjectState(employee, EntityState.Deleted);
        }
        else{this.ObjectContext.Employee.Attach(employee);
           this.ObjectContext.Employee.DeleteObject(employee);
        }
    }
}
}

Step 6: Now rebuild the solution file.
Step 7: The complete code of MainPage.xaml looks like this:
<usercontrolx:class="SilverlightRIAInsert.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="543">
<Gridx:Name="LayoutRoot"Width="608">
<TextBlockHeight="23"HorizontalAlignment="Left"Margin="152,29,0,0"Name="textBlock1"Text="Id"FontFamily="Verdana"FontSize="15"VerticalAlignment="Top"/>
<TextBoxHeight="23"HorizontalAlignment="Left"Margin="252,25,0,0"Name="textBox1"VerticalAlignment="Top"Width="120"/>
<TextBlockHeight="23"HorizontalAlignment="Left"Margin="150,72,0,0"Name="textBlock2"Text="FirstName"FontFamily="Verdana"FontSize="15"VerticalAlignment="Top"/>
<TextBoxHeight="23"HorizontalAlignment="Left"Margin="252,68,0,0"Name="textBox2"VerticalAlignment="Top"Width="120"/>
<TextBlockHeight="23"HorizontalAlignment="Left"Margin="150,113,0,0"Name="textBlock3"Text="LastName"FontFamily="Verdana"FontSize="15"VerticalAlignment="Top"/>
<TextBoxHeight="23"HorizontalAlignment="Left"Margin="252,113,0,0"Name="textBox3"VerticalAlignment="Top"Width="120"/>
<ButtonContent="Update"FontFamily="Verdana"FontSize="19"Background="DeepSkyBlue"Height="44"HorizontalAlignment="Left"Margin="252,206,0,0"Name="button1"VerticalAlignment="Top"Width="120"Click="button1_Click"/>
<TextBoxHeight="23"HorizontalAlignment="Left"Margin="252,155,0,0"Name="textBox4"VerticalAlignment="Top"Width="120"/>
<TextBlockHeight="23"HorizontalAlignment="Left"Margin="152,155,0,0"Name="textBlock4"Text="Age"FontFamily="Verdana"FontSize="16"VerticalAlignment="Top"/>
</Grid>"
</usercontrol>

Step 8: The complete code of MainPage.xaml.cs looks like this:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.ServiceModel.DomainServices.Client;
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;
using SilverlightRIAUpdate.Web;
namespace SilverlightRIAUpdate
{
public partial class MainPage : UserControl
{
    public MainPage()
    {
        InitializeComponent();
    }
    EmployeeDomain objDomain = new EmployeeDomain();
    private void button1_Click(object sender, RoutedEventArgs e)
    {
        EntityQuery<Employee> query = objDomain.GetEmployeeQuery();
        objDomain.Load(query, UpdateLoad, null);
        MessageBox.Show("Data Updated Successfully");
    }
    public void UpdateLoad(LoadOperation<Employee> emp)
    {
        foreach (Employee e in objDomain.Employees)
        {
            if (e.Id == int.Parse(textBox1.Text))
           {
                e.FirstName = textBox2.Text;
                e.LastName = textBox3.Text;
                e.Age = int.Parse(textBox4.Text);
                objDomain.SubmitChanges();
                break;
            }
        }
    }
}
}

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Navigation Framework is absolutely good however in some cases we have a tendency to don't need to use the Navigation Framework. This navigation technique may be used instead that provides simple Navigation. Add the following code in App.xaml:

private static Grid root    
public static void Navigate(UserControl newPage)
{
UserControl oldPage = root.Children[0] as UserControl;
root.Children.Add(newPage);
root.Children.Remove(oldPage);
}

Now, Edit the App.xaml as shown below:
Previous code: 
private void Application_Startup(object sender, StartupEventArgs e)
{
 this.RootVisual = new MainPage();
 }

Modified code:
private void Application_Startup(object sender, StartupEventArgs e)
{
root = new Grid();
root.Children.Add(new MainPage());
this.RootVisual = root;     
}

Create a new usercontrol NewPage . Add Button to the Page inorder to navigate to the home. equally produce a button within the MainPage.xaml as well inorder to navigate to the NewPage. within the Button Click event add the following code:
       App app = (App)Application.Current;
        App.Navigate(new NewPage());

Application.Current gets the System.Windows.Application object for this application. The new instance of the Page is passed to the Navigate method of App class. When we run the code we are able to navigate between the MainPage and also the NewPage.xaml.

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Hi friends, in this short article I will tell you about How to Align Text in DataGrid Cell in Xaml and in Code Behind with Silverlight 6. First, take a look the following code:

DataGridTextColumn textColumn = new DataGridTextColumn();
textColumn.Header = "Result";
textColumn.Binding = new Binding("Result");
dataGrid1.Columns.Add(textColumn);

How I will set RESULT alignment right? Here is what you've got to try to to, I'll show you this in each ways that like doing it in Xaml Page and doing it in code behind. First add the style in your User control Resource:
<UserControl.Resources>
      <Style x:Key="AlignRight" TargetType="Data:DataGridCell">
          <Setter Property="HorizontalContentAlignment" Value="Right" />
     </Style>
</UserControl.Resources>

I'm doing this for Right Align however you'll be able to change it in keeping with your requirement. Next, the way to do this in Xaml Page? Its terribly straightforward, apply this style to whichever column you would like, like this:

<Data:DataGridTextColumn Header="Amount" Width="90" Binding="{Binding Amount}" IsReadOnly="True" CellStyle="{StaticResource AlignRight}"></Data:DataGridTextColumn>

Now how to do this in code behind:
DataGridTextColumn textColumn = new DataGridTextColumn();
textColumn.Header = "Result";
textColumn.Binding = new Binding("Result");
textColumn.CellStyle = Resources["AlignRight"] as Style;
dataGrid1.Columns.Add(textColumn);

Hope it works for you!

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