More info @ http://blogs.zdnet.com/microsoft/?p=2912

Enjoy! :)

I’ve made small demo application on how to search Twitter using Twitter REST API and RadGridView for Silverlight: 

To download Twitter ATOM response you can use simple WebClient:

if (!String.IsNullOrEmpty(TextBox1.Text))
{
    WebClient client = new WebClient();
    client.DownloadStringCompleted += newDownloadStringCompletedEventHandler(client_DownloadStringCompleted);
    if(!client.IsBusy)
        client.DownloadStringAsync(new Uri(String.Format(urlFormat, TextBox1.Text, pageSize, currentPageIndex)));
}

and you can parse the response using XDocument.Parse() method:

XNamespace atomNamespace = "http://www.w3.org/2005/Atom";
RadGridView1.ItemsSource = from item in XDocument.Parse(e.Result).Descendants(atomNamespace + "entry") 
                          select new TwitterEntry
                          {
                               ID = item.Element(atomNamespace + "id").Value,
                               ...

Since there is no DataTable in Silverlight I’ve created small class that can be used to generate columns and rows in runtime in similar to the real DataTable way:

DataTable  table =  new  DataTable();

table.Columns.Add(new  DataColumn() { ColumnName =  "ID", DataType =  typeof(int) });
table.Columns.Add(new  DataColumn() { ColumnName =  "Name", DataType =  typeof(string) });
table.Columns.Add(new  DataColumn() { ColumnName =  "UnitPrice", DataType =  typeof(decimal) });
table.Columns.Add(new  DataColumn() { ColumnName =  "Date", DataType =  typeof(DateTime) });
table.Columns.Add(new  DataColumn() { ColumnName ...

I'm happy to announce that with our next service pack you will be able to bind RadGridView completely codeless to DomainDataSource in Silverlight 3:

<Grid>
  <Grid.RowDefinitions>
    <RowDefinition  />
    <RowDefinition  Height="30"  />
  </Grid.RowDefinitions>
  <riaControls:DomainDataSource  x:Name="DomainDataSource1"  AutoLoad="True"  LoadMethodName="LoadCustomers">
    <riaControls:DomainDataSource.DomainContext>
      <localWeb:NorthwindDomainContext  />
    </riaControls:DomainDataSource.DomainContext>
  </riaControls:DomainDataSource>
  <telerik:RadGridView  x:Name="RadGridView1"  ItemsSource="{Binding Data, ElementName=DomainDataSource1}" />
  <df:DataPager  x:Name="DataPager1"  Grid.Row=...

Another popular feature in RadGrid for ASP.NET AJAX is header context menu and I’ve made small demo how to achieve the same in RadGridView for Silverlight:
 

Similar to the custom filter row you can enable this functionality for your grid with a single property:

<telerikGrid:RadGridView  x:Name="RadGridView1" 
              telerikGridViewHeaderMenu:GridViewHeaderMenu.IsEnabled="True"  telerik:StyleManager.Theme="Vista" />

Enjoy!

[Download]

To enable RadContextMenu for every grid data row you should do:

1) Handle RowLoaded event for the grid and create RadContextMenu:

void  RadGridView1_RowLoaded(object  sender,  RowLoadedEventArgs  e)
{
     if  (!(e.Row  is  GridViewHeaderRow) && !(e.Row  is  GridViewNewRow))
    {
         RadContextMenu  rowContextMenu =  new  RadContextMenu();  // create menu
         StyleManager.SetTheme(rowContextMenu,  StyleManager.GetTheme(RadGridView1));  // set menu Theme

        // create menu items
         rowContextMenu.Items.Add(new  RadMenuItem() { Header =  "Show row ID property value"  });
        rowContextMenu.Items.Add(new  RadMenuItem() { Header =  "Item2", IsEnabled =  false  });
        rowContextMenu.Items.Add(new  RadMenuItem() { Header =  "Item3", IsEnabled =  false  });
        
         // ...

I’ve made another demo (similar to this one) on how to save and restore various RadGridView settings using IsolatedStorageFile and DataContractSerializer. Again to turn on this for your grid you can simply set RadGridViewSettings.IsEnabled attached property:

<UserControl x:Class="SaveLoadSettingsWithRadGridViewForSilverlight.Page"
   xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
   xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
   xmlns:telerik="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.GridView"
    xmlns:ts="clr-namespace:Telerik.Settings">
    <Gridx:Name="LayoutRoot"Background="White">
        <telerik:RadGridView ts:RadGridViewSettings.IsEnabled="True" x:Name="RadGridView1" />
    </Grid>
</UserControl>

Saved settings are

• Sorting
• Grouping
• Filtering ...

Since our RadGrid for ASP.NET AJAX filter row is very popular, I’ve made small demo how to achieve the same in RadGridView for Silverlight:

 

To turn on this for your grid you can simply set GridViewFilterRow.IsEnabled attached property:

<UserControl  x:Class="CustomFilterRow.Page"
     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
     xmlns:telerikGridViewFilter="clr-namespace:Telerik.Windows.Controls.GridView.Filter"  xmlns:telerik="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.GridView">
    <Grid  x:Name="LayoutRoot"  Background="White">
        <telerik:RadGridView  x:Name="RadGridView1"  AutoGenerateColumns="False"
             telerikGridViewFilter:GridViewFilterRow.IsEnabled="True">
            <telerik:RadGridView.Columns>
                <telerik:GridViewDataColumn  HeaderText="ID"  DataMemberBinding="{Binding  ID}" ...

I’ve made small demo on how to save and restore various RadGridView settings using ApplicationSettingsBase.
To turn on this for your grid you can simply set RadGridViewSettings.IsEnabled attached property:

<Window  x:Class="WpfApplication1.Window1"
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"
  xmlns:local="clr-namespace:WpfApplication1"  
  xmlns:ts="clr-namespace:Telerik.Settings"  Title="Window1">
    <Grid>
        <Grid.Resources>
            <ObjectDataProvider  x:Key="customers"
  ObjectType="{x:Type  local:NorthwindDataContext}"  MethodName="get_Customers">
            </ObjectDataProvider>
        </Grid.Resources>
        <telerik:RadGridView  ts:RadGridViewSettings.IsEnabled="True"  x:Name="RadGridView1"
  ItemsSource="{Binding  ...

I’m pleased to announce that with our upcoming service pack for Silverlight/WPF (middle of April) you will have the ability to style and format easily your data just before export:

Enjoy!