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European Silverlight Hosting - Amsterdam :: Silverlight Watermark TextBox Behavior

clock April 29, 2013 10:48 by author Scott

Maybe there is a working solution for this already out there, but I created my own Silverlight Behavior for a basic TextBox Watermark which might be useful.

I wanted to use it like this in my XAML (look at the behaviors tag):

<TextBlock Margin="5">Watermarked textbox:</TextBlock>
<TextBox Margin="5">
        <local:Watermark Text="Watermark" Foreground="LightGray" />

The result should be something like this:

To create a Behavior for Silverlight, you must get hold of the System.Windows.Interactivity assembly which ships with Expression Blend. In my system it’s located at:

c:\Program Files (x86)\Microsoft SDKs\Expression\Blend\Silverlight\v4.0\Libraries\System.Windows.Interactivity.dll

And the code for the Behavior:

public class Watermark : Behavior<TextBox>
    private bool _hasWatermark;
    private Brush _textBoxForeground;
    public String Text { get; set; }
    public Brush Foreground { get; set; }
    protected override void OnAttached()
        _textBoxForeground = AssociatedObject.Foreground;
        if (Text != null)
        AssociatedObject.GotFocus += GotFocus;
        AssociatedObject.LostFocus += LostFocus;
    private void LostFocus(object sender, RoutedEventArgs e)
        if (AssociatedObject.Text.Length == 0)
            if (Text != null)
    private void GotFocus(object sender, RoutedEventArgs e)
        if (_hasWatermark)
    private void RemoveWatermarkText()
        AssociatedObject.Foreground = _textBoxForeground;
        AssociatedObject.Text = "";
        _hasWatermark = false;
    private void SetWatermarkText()
        AssociatedObject.Foreground = Foreground;
        AssociatedObject.Text = Text;
        _hasWatermark = true;
    protected override void OnDetaching()
        AssociatedObject.GotFocus -= GotFocus;
        AssociatedObject.LostFocus -= LostFocus;

Like so many Watermark-solutions out there I’m hooking into the GotFocus/LostFocus events and to the work there. Works for me.


European WCF Hosting - Amsterdam :: How to Host WCF Service in IIS 8 (Windows Server 2012)

clock April 25, 2013 06:56 by author Scott

This blog cover brief information how to host your WCF service in IIS8 (Windows Server 2012).

Here is the solution.

Server Roles

1. First make sure you have enabled IIS function and .net 3.5 in Features.
For the IIS features, please remember to enable ASP.NET3.5 and ASP.NET 4.5

2. Second, check the IIS Hostable WebCore
3. Finally, I think the most important is this:

Check Application Sever->Web Server (IIS) Support

I have also check the HTTP Activation in Windows Process Activation Service Support, but I do not know if it is required.

For the freatures,

1. Check all items in .NET 3.5
2. Check WCF Service in .NET 4.5

That’s it.

Last but not least, I have register the WCF Service from

C:\Windows\Microsoft.NET\Framework\v3.0\Windows Communication Foundation\ServiceModelReg.exe –i

Run the above in command line.


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