Public Property ImageFormat As ArcGISDynamicMapServiceLayer.RestImageFormat

public ArcGISDynamicMapServiceLayer.RestImageFormat ImageFormat {get; set;}

<Grid x:Name="LayoutRoot">
  
  <!-- Add a Map Control. Set the Extent to the continental United States. -->
  <esri:Map Background="White" HorizontalAlignment="Left" Margin="12,113,0,0" Name="Map1" 
        VerticalAlignment="Top" Height="367" Width="426" Extent="-14811263,296658,-5960159,7921904">
    
    <!-- Add an ArcGISTiledMapServiceLayer. -->
    <esri:ArcGISTiledMapServiceLayer ID="World_Light_Gray_Base" 
          Url="http://services.arcgisonline.com/ArcGIS/rest/services/Canvas/World_Light_Gray_Base/MapServer"/>
    
    <!--Add an ArcGISDynamicMapServiceLayer. -->
    <esri:ArcGISDynamicMapServiceLayer ID="USA_1990-2000_Population_Change"
          Url="http://services.arcgisonline.com/ArcGIS/rest/services/Demographics/USA_1990-2000_Population_Change/MapServer"/>
    
  </esri:Map>
  
  <!-- Pick and ImageFormat from the ListBox to change the image type returned from ArcGIS Server. -->
  <sdk:Label Height="28" HorizontalAlignment="Left" Margin="444,113,0,0" Name="Label1" VerticalAlignment="Top" 
       Width="120" Content="Pick an ImageFormat:"/>
  <ListBox Height="96" HorizontalAlignment="Left" Margin="444,132,0,0" Name="ListBox1" VerticalAlignment="Top" 
           Width="120" SelectionChanged="ListBox1_SelectionChanged" />
  
  <!-- Provide the instructions on how to use the sample code. -->
  <TextBlock Height="107" HorizontalAlignment="Left" Name="TextBlock1" VerticalAlignment="Top" Width="788" 
             TextWrapping="Wrap" Text="Click on the various ImageFormats supported by the ArcGISDynamicMapServiceLayer 
             to see the effect in the Map. PNG8 will display the symbology slightly pixelated. The PNG24 and 
             PNG24 provide clear rendering of the symbology. JPG uses a lossy data compression and hence the 
             background pixels will not show as transparent and will mask the 'World_Light_Gray_Base' 
             ArcGISTiledMapServiceLayer on the bottom."/>
  
</Grid>

public MainPage()
{
  InitializeComponent();
  
  // Add all of the supported ArcGISDynamicMapServiceLayer.ImageFormat types into the ListBox.
  ListBox1.Items.Add(ESRI.ArcGIS.Client.ArcGISDynamicMapServiceLayer.RestImageFormat.PNG8);
  ListBox1.Items.Add(ESRI.ArcGIS.Client.ArcGISDynamicMapServiceLayer.RestImageFormat.PNG24);
  ListBox1.Items.Add(ESRI.ArcGIS.Client.ArcGISDynamicMapServiceLayer.RestImageFormat.PNG32);
  ListBox1.Items.Add(ESRI.ArcGIS.Client.ArcGISDynamicMapServiceLayer.RestImageFormat.JPG);
}
            
private void ListBox1_SelectionChanged(object sender, System.Windows.Controls.SelectionChangedEventArgs e)
{
  // Get the ArcGISDynamicMapServiceLayer.
  ESRI.ArcGIS.Client.ArcGISDynamicMapServiceLayer theArcGISDynamicMapServiceLayer = (ESRI.ArcGIS.Client.ArcGISDynamicMapServiceLayer)(Map1.Layers["USA_1990-2000_Population_Change"]);
  
  // Get the ImageFormat selection from the ListBox.
  ESRI.ArcGIS.Client.ArcGISDynamicMapServiceLayer.RestImageFormat theSelection = (ESRI.ArcGIS.Client.ArcGISDynamicMapServiceLayer.RestImageFormat)ListBox1.SelectedItem;
  
  // Set the ImageFormat from the user selection.
  theArcGISDynamicMapServiceLayer.ImageFormat = theSelection;
  
  // Refresh the ArcGISDynamicMapServiceLayer in the Map.
  theArcGISDynamicMapServiceLayer.Refresh();
}

Public Sub New()
  InitializeComponent()
  
  ' Add all of the supported ArcGISDynamicMapServiceLayer.ImageFormat types into the ListBox.
  ListBox1.Items.Add(ESRI.ArcGIS.Client.ArcGISDynamicMapServiceLayer.RestImageFormat.PNG8)
  ListBox1.Items.Add(ESRI.ArcGIS.Client.ArcGISDynamicMapServiceLayer.RestImageFormat.PNG24)
  ListBox1.Items.Add(ESRI.ArcGIS.Client.ArcGISDynamicMapServiceLayer.RestImageFormat.PNG32)
  ListBox1.Items.Add(ESRI.ArcGIS.Client.ArcGISDynamicMapServiceLayer.RestImageFormat.JPG)
  
End Sub
            
Private Sub ListBox1_SelectionChanged(sender As System.Object, e As System.Windows.Controls.SelectionChangedEventArgs)
  
  ' Get the ArcGISDynamicMapServiceLayer.
  Dim theArcGISDynamicMapServiceLayer As ESRI.ArcGIS.Client.ArcGISDynamicMapServiceLayer = CType(Map1.Layers.Item("USA_1990-2000_Population_Change"), ESRI.ArcGIS.Client.ArcGISDynamicMapServiceLayer)
  
  ' Get the ImageFormat selection from the ListBox.
  Dim theSelection As ESRI.ArcGIS.Client.ArcGISDynamicMapServiceLayer.RestImageFormat = CType(ListBox1.SelectedItem, ESRI.ArcGIS.Client.ArcGISDynamicMapServiceLayer.RestImageFormat)
  
  ' Set the ImageFormat from the user selection.
  theArcGISDynamicMapServiceLayer.ImageFormat = theSelection
  
  ' Refresh the ArcGISDynamicMapServiceLayer in the Map.
  theArcGISDynamicMapServiceLayer.Refresh()
  
End Sub