In this post I'll describe the way to handle the exceptions in Silverlight. Whereas running the Silverlight application, if any exception happens it'll attend Silverlight.js and show within the internet explorer as a javascript error. Within the debugging purpose of read typically it's cumbersome to see wherever truly the exception happened.

LogWindow.xaml
This is an easy user control that has an easy textbox:
<TextBox
AcceptsReturn="True"
TextAlignment="Left"
TextWrapping="NoWrap"
VerticalScrollBarVisibility="Visible"
x:Name="logText"
FontFamily="Courier New"
FontSize="12" IsReadOnly="True" HorizontalScrollBarVisibility="Auto" />

Logger.cs
This class are used to print the exception and notice the stacktrace. it's an enum for the exception types viz. DEBUG,INFO,WARN,ERROR and FATAL.This class contains an easy delegate to add text to the log window. The static property _instance is about by the LogWindow.xaml.cs go in the load event as:
Logger._instance = logText;
So that it will print whatever exception happenes in your application. The LogException methodology expects exception object because the parameter and find the exception information using the StackFrame class.

StackFrame frame = new StackFrame(true);
callerSignature =  string.Format("@{0}:{1}:{2}", frame.GetMethod(), frame.GetFileName(), frame.GetFileLineNumber());

To use this method in your catch block you just simply need to call the static method as:
Catch(Exception ex)
{
Logger.LogException(ex);
}

Hope this tutorial works for you!

In this article, you will see how to run an Elevated Trust Application within the Browser using Silverlight 5 Beta. For this demonstration, you will first create a Silverlight application by using Visual Studio 2010 with Silverlight Version 5.

Step 1

We will rename the application as 'TrustedAppsInBrowser' as shown below:

Step 2

Make sure you choose Silverlight version 5.0. Now let's add a reference of a API 'Microsoft.CSharp.dll' to our Silverlight application. Browse this API from the path 'C:\Program Files (x86)\Microsoft SDKs\Silverlight\v4.0\Libraries\Client'. Then, design the MainPage.xaml. and replace <Grid></Grid> with following code:

<Grid x:Name="LayoutRoot" Background="Black">         <Grid.RowDefinitions>             <RowDefinition Height="44*" />             <RowDefinition Height="44*" />             <RowDefinition Height="44*" />             <RowDefinition Height="170*" />         </Grid.RowDefinitions>         <StackPanel Orientation="Horizontal" Grid.Row="0">             <TextBlock Text="TO - :" Foreground="Yellow" FontSize="14"         HorizontalAlignment="Center" VerticalAlignment="Center"/>             <TextBox x:Name="txtTO" Width="350" Height="30"/>         </StackPanel>         <StackPanel Orientation="Horizontal" Grid.Row="1">             <TextBlock Text="CC - :" Foreground="Yellow" FontSize="14"         HorizontalAlignment="Center" VerticalAlignment="Center"/>             <TextBox x:Name="txtCC" Width="350" Height="30"/>         </StackPanel>         <StackPanel Orientation="Horizontal" Grid.Row="2">             <TextBlock Text="Subject - :" Foreground="Yellow" FontSize="14"         HorizontalAlignment="Center" VerticalAlignment="Center"/>             <TextBox x:Name="txtsubject" Width="315" Height="30"/>         </StackPanel>         <StackPanel Orientation="Vertical" Grid.Row="3">             <TextBox x:Name="txtmessage" Width="400" Height="120"         HorizontalAlignment="Left" VerticalAlignment="Top" />             <StackPanel Orientation="Horizontal" HorizontalAlignment="Center">                 <Button x:Name="btnSend" Content="Send" Height="30" Width="100"          Click="btnSend_Click"/>                 <Button x:Name="btncancel" Content="Cancel" Height="30" Width="100" />             </StackPanel>         </StackPanel> </Grid>

Step 3

Now let's import a namespace to our code behind:

using System.Runtime.InteropServices.Automation;

Step 4

Now run your application and click on the 'Send' button. You will get an exception as shown below:

The operation is not supported in this context. You cannot call COM components directly from the browser due to security reasons. However you can achieve the same by making this Silverlight Application as an Out-Of-Browser application with Elevated Trust. You have to run this application in the Browser. To run this application in the browser, you must set this application to run Out-Of-Browser with Elevated Trust. Right click the Silverlight Application and go to Properties. Choose checkbox 'Enable running application Out of the browser' and click on 'Out of browser settings' button. From the setting window, chose a checkbox 'Require Elevated trust when running outside the browser'.

Step 5

Now you will have to follow the steps given below for enabling our Silverlight application to run within the browser, with Elevated trust.

1: Go to Start and click on Run.  Type 'RegEdit'. This will open the 'Registry Editor' window. Now the most important thing is that If you running the app on a 32 bit machine, you will have to find:

· HKEY_LOCAL_MACHINE\Software\Microsoft\Silverlight\

and if you are running on a 64-bit machine, you will have to find:

· HKEY_LOCAL_MACHINE\Software\Wow6432Node\Microsoft\Silverlight\

I took the reference of MSDN for this path. My computer is 64-bit, so I have chosen the second option. Once you find the above path in the registry, make a change to 'UpdateConsentMode' from '0' to '1' as shown below:

2: Now the second step is to Sign the .XAP file of our Silverlight application with code signing certificate. Right click t Sheilverlight application and go to properties. Choose ‘Signing from the left hand side’ and check the checkbox 'Sign the .XAP file' as shown below:

Now click on the button 'Create Test Certificate'. Enter the password and confirm password and click 'OK' button.

3: Now click on the 'More Details' button highlighted in blue colour. This will show you a 'Certificate' window. Click on the 'Install Certificate' button as shown below:

Clicking on the button brings up the 'Certificate Import wizard'. Click on the 'Next' button and choose 'Place all certificates in the following store'. Click on the Browse button. This will show you a 'Certificate Store'. Choose 'Trusted Publisher' and finish the wizard. Now repeat the same step to install this certificate in 'Trusted Root Certification Authorities'.

That's it! You are done with the configuration. Now hit 'F5' to launch the Silverlight application in a browser. Fill the details and click on the 'Send' button. This will show you a Internet Security dialog box. Click on the 'Allow' button and you will see the output as shown below:

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I recently got a note around a pestering issue in utilizing StringFormat as a part of XAML binding expressions and how it doesn't respect current user’s culture settings. This is genuine that there is an issue in that it doesn't in WPF or Silverlight. In the event that you don't hear what I'm saying, Silverlight acquainted the capacity with utilization StringFormat in data binding expressions (WPF has had this since 3.5 SP1) so you could do some formatting in-line in your binding.  Like this:

<TextBlock Text="{Binding Path=CurrentDate, StringFormat=Current Timestamp is: \{0:G\}}" />

This would bring about content that future organized straightforwardly utilizing your string Formatter without the requirement for code-behind or any non specific ValueConverter. This is an extremely accommodating gimmick for organizing UI values and at times trading ValueConverters for straightforward assignments.

The issue is that StringFormat isn't regarding the client's way of life settings. Take for instance this complete XAML:
<StackPanel x:Name="FooContainer">
<TextBlock x:Name="CultureInfo" />
<TextBlock x:Name="UICultureInfo" />
<TextBlock Text="{Binding Path=CurrentDate, StringFormat=Current Timestamp is: \{0:G\}}" />
<TextBlock x:Name="CostField" Text="{Binding Path=Cost, StringFormat=Cost is: \{0:c\}}" />
 <toolkit:GlobalCalendar  />
</StackPanel>
This is being sure to a straightforward item that uncovered two properties for the reasons of showing: CurrentDate (DateTime) and Cost (double). Utilizing my standard US-English settings and territorial inclination the result would be:

Presently, give me a chance to tell my Silverlight application that I have an alternate culture information.  I can do this without having to force a language pack installation of sorts and completely change my machine. Including the way of culture/uiculture params to the <object> tag does the trap. I'll transform it to "de-de" for German. Here is the new output:

Indeed the settings perceive an alternate culture, StringFormat is not doing what I anticipate. I would have expected an alternate date show for German settings (d.m.yyyy) and an alternate currency display instead of dollars.

Shockingly this is an issue in StringFormat at this time, however there is a simple workaround that if you are creating a localized app you can add to your code that shouldn’t affect your default language settings either.  In my constructor I add this line of code:
this.Language = XmlLanguage.GetLanguage(Thread.CurrentThread.CurrentCulture.Name);

This advises the markup system to utilize the current culture settings as the UI language. XmlLanguage is a piece of the System.Windows.Markup namespace, so guarantee you get that out explicitly or add a using statement.  Now refreshing my German settings sample I get:

Not surprisingly. Changing (or removing the explicit setting of culture in my  <object> tag) back to my default culture settings brings about my US-English preferences being used and no need for me to change the XAML.

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In this article let us figure out how to utilize Stack panel Layout in a Silverlight application. StackPanel is an alternate most critical board in Silverlight. It is predominantly helpful when we need to demonstrate some of your Silverlight components either Horizontally or Vertically.

Of course, open visual studio and select Silverlight project. We can perceive that there is a Grid format in our MainPage.xaml. Delete the default Grid layout and just drag and drop the Stack panel Layout into our application. The code for this looks like as:
<StackPanel Orientation="Vertical" Background="White" Height="200" Width="100">
            <Rectangle Height="50" Width="100" Fill="Red" />
            <Rectangle Height="50" Width="100" Fill="Blue" />
           <Rectangle Height="50" Width="100" Fill="Gray" />
            <Rectangle Height="50" Width="100" Fill="Goldenrod" />      
</StackPanel>

From the above code we can perceive that I put 4 rectangles in our Stack panel layout. What's more I have given a worth "Vertical" to the property "Orientation" of Stack board design. It implies that all the four rectangles will allign in vertical request. Presently give us a chance to assume we need all the rectangles to be adjusted in level request, then we ought to give the worth "Flat" to the property "Introduction" of Stack board format.

The code for this looks like as:
Presently give us a chance to assume we need all the rectangles to be adjusted in flat request, then we ought to give value “Horizontal” to the property “Orientation”  of Stack panel layout. The code for this looks like as
<StackPanel Orientation="Horizontal" Background="White" Height="100" Width="300">
            <Rectangle Height="100" Width="60" Fill="Red" />
            <Rectangle Height="100" Width="60" Fill="Blue" />
            <Rectangle Height="100" Width="60" Fill="gray" />
            <Rectangle Height="100" Width="60" Fill="Goldenrod" />      
</StackPanel>

And this is the output:

Here is the sample code for the above explanation:

MainPage.xaml
<UserControl x:Class="SilverlightApplication1.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">
    <StackPanel Orientation="Vertical" Background="White" Height="200" Width="100">          
            <Rectangle Height="50" Width="100" Fill="Red" />
            <Rectangle Height="50" Width="100" Fill="Blue" />
            <Rectangle Height="50" Width="100" Fill="Gray" />
            <Rectangle Height="50" Width="100" Fill="Goldenrod" />     
    </StackPanel>
</UserControl>

That above code will give you rectangles with vertical alignment. If you want horizontal alignment then replace complete code between <StackPanel> and </StackPanel> with the horizontal code.

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In this article let us see the distinctive methods for utilizing the property Clickmode for a Button Control in a Silverlight application. Of course, open the visual studio and select the Silverlight 5 project.

First let us drag 3 different Button and TextBlock controls to Stack Panel as shown below into MainPage.xaml. Here I utilized a property called "ClickMode" for all the three button controls, But the value assigned to it is diverse.

For the first button I allocated the quality Hover to the ClickMode property, It implies that the click event handler happens at whatever point the mouse is floated onto this button.

For the second button, I allocated the quality Press to the ClickMode property, It implies that the click occasion handler happens at whatever point the mouse is clicked on this catch.  For the third button I assigned the value Release to the ClickMode property, It implies that the click event handler happens at whatever point the mouse is discharged from this button.

<Button x:Name="btn1" Margin ="5" HorizontalAlignment="Left"
Foreground="Black" Width="320" Click="OnClick1"
Content="On Mouse Hover this text will appear below" ClickMode="Hover" />
<TextBlock x:Name="text1" Margin ="0,8,0,0" />
<Button x:Name="btn2" Margin ="5,5,5,5"  HorizontalAlignment="Left"
Foreground="Black" Width="320" Click="OnClick2"
Content="On Button Press this text will appear below" ClickMode="Press" />
<TextBlock x:Name="text2" Margin="0,8,0,0" />
<Button x:Name="btn3" Margin ="5,5,5,5" HorizontalAlignment="Left"           

Click="OnClick3" Width="320" Content="On Button Release this text will appear    below" ClickMode="Release"/>
<TextBlock x:Name="text3" Margin ="0,8,0,0" />

Now i am writing the code for button click events in the MainPage.xaml.cs
public MainPage()
        {
            InitializeComponent();
        }
        void OnClick1(object sender, RoutedEventArgs e)
        {
            btn1.Foreground = new SolidColorBrush(Colors.Blue);
            text1.Text = "On Mouse Hover this text will appear below.";
            text2.Text = "";
            text3.Text = "";
        }
        void OnClick2(object sender, RoutedEventArgs e)
        {
            btn2.Foreground = new SolidColorBrush(Colors.Green);
            text1.Text = "";
            text2.Text = "On Button Press this text will appear below.";
            text3.Text = "";
        }
        void OnClick3(object sender, RoutedEventArgs e)
        {
            btn1.Foreground = new SolidColorBrush(Colors.Green);
            btn2.Foreground = new SolidColorBrush(Colors.Blue);
            text1.Text = "";
            text2.Text = "";
            text3.Text = "On Button Release this text will appear below.";
        }

Just refresh it. And here is the output.

Output for the first Button looks like:

Output for the second Button looks like:

Output for the third Button looks like: 

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In this post, I've been using Web-Service brings in Silverlight for various years now in a group of different applications with the unwieldy async BeginGetResponse, callback, EndGetResponse syntax. It's all been working extraordinary, I joyfully have a layout for this and can bash any new service integrations pretty quickly and has not been getting in the way. For a straightforward Get request they look something like this:

public string server = "123.123.123.123";
public void GetExample()
{
    String url = "http://" + server + "/getexample";
    try
    {
        HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
        IAsyncResult result = null;
        result = request.BeginGetResponse(GetExampleCallback, request);
    }
    catch (Exception)
    {
    }
}
void GetExampleCallback(IAsyncResult ar)
{
    var request = ar.AsyncState as HttpWebRequest;
    var response = request.EndGetResponse(ar) as HttpWebResponse;
    using (var reader = new StreamReader(response.GetResponseStream()))
    {
        string result = reader.ReadToEnd();
        // now do something with this
    }
}
Which is all great and I typically have some extra code here to callback to a representative which can then do something, for example, show the result nonconcurrently with the regular playing around of recovering this onto the GUI string using a BeginInvoke Dispatch. It then gets somewhat more muddled when you need to make a post ask for and need to push the XML parameters in an alternate asynch BeginGetRequestStream capacity which means you're getting callback after callback.

Simple enough, these can be packaged into a class for every Webservice work and can utilize some templating to diminish the exertion, yet's regardless it really dull. I've remain faithful to it in light of the fact that it meets expectations, I have an example and normally its not all that much inconvenience and once done means I can concentrate on the other fascinating bits of the application.

What I thought of resembles this:
using System.Threading.Tasks;
public string server = "123.123.123.123";
public void GetExample2()
{
    String url = "http://" + server + "/getexample2";
    try  
 {
        HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
        IAsyncResult result = null;
        ManualResetEvent mre = new ManualResetEvent(false);
        result = request.BeginGetResponse((cb) =>
        {
            // Callback
            using (var response = request.EndGetResponse(cb) as HttpWebResponse)
            {
                using (var reader = new StreamReader(response.GetResponseStream()))
                {
                }
            }
            mre.Set();
        }, request);
        mre.WaitOne();
  }
    catch (Exception)
    {
    }
}
Essentially this is to handle the offbeat nature. In the event that you run this in the debugger you can see the BeginGetResponse call being made. Waitone() which is the typical string stream of the operation. You can then see the debugger bounce move down to the callback. The mre.set then sets the stream to proceed in the fundamental string once the callback has completed.