Public Class FeatureLayer 
   Inherits GraphicsLayer
   Implements IAttribution, ILegendSupport 

public class FeatureLayer : GraphicsLayer, IAttribution, ILegendSupport  

<Grid x:Name="LayoutRoot" >
  
  <!-- Add a Map Control to the application. Set the Extent the southern United States. -->
  <esri:Map x:Name="Map1" WrapAround="True" HorizontalAlignment="Left" VerticalAlignment="Top" 
            Margin="0,238,0,0" Height="350" Width="415" Extent="-12807029,2300843,-9398029,5175903">
  
    <!-- 
    Add a FeatureLayer. Wire-up the Initialized Event to display information about the layer in a TextBox.
       
    The Where clause is optional. It is necessary when more that 500/1000 records returned. In ArcGIS Server 
    9.3.1 and prior, the default maximum is 500 records returned per FeatureLayer. In ArcGIS Server 10 the 
    default is 1000. This setting is configurable per map service using ArcCatalog or ArcGIS Server Manager 
    (on the Parameters tab). In this example we use the Where clause to only return 4 features.
    
    Setting the IgnoreServiceScaleRange = "True" is helpful if the defined map service has restrictions on
    different scale levels for which the features can be viewed (ex: in the ArcGIS Services Directory REST 
    documentation these would be the 'Min. Scale' and 'Max. Scale' metadata items). The value of 
    "True" always draws the features regardless of the current map scale.
    -->
    <esri:FeatureLayer ID="TX_OK_AZ_NM_Unemployment_Rate" IgnoreServiceScaleRange="True"
          Where="ST_ABBREV = 'TX' OR ST_ABBREV = 'OK' OR ST_ABBREV = 'AZ' OR ST_ABBREV = 'NM'"
          Url="http://server.arcgisonline.com/ArcGIS/rest/services/Demographics/USA_Unemployment_Rate/MapServer/4"
          Initialized="FeatureLayer_Initialized" />
    
  </esri:Map>
  
  <!-- Add a Button that will allow the user to add another FeatureLayer via code-behind. -->
  <Button Name="Button1" Height="23" HorizontalAlignment="Left" Margin="0,209,0,0"  VerticalAlignment="Top" 
          Width="706" Content="Add another FeatureLayer (via code-behind) for the specified Url."
          Click="Button1_Click" />
  
  <!-- TextBox to display information about about the FeatureLayers added to the Map. -->
  <TextBox Height="350" HorizontalAlignment="Left" Margin="421,238,0,0" Name="TextBox1" VerticalAlignment="Top" 
           Width="285" />
  
  <!-- Provide the instructions on how to use the sample code. -->
  <TextBlock Height="174" HorizontalAlignment="Left" Name="TextBlock1" VerticalAlignment="Top" Width="788" 
             TextWrapping="Wrap" Text="When the application loads a FeatureLayer will automatically be added 
             to the Map (it was specified in XAML). Click the Button to add another FeatureLayer to the Map 
             (it will be added via code-behind). The ID of each layer will displayed in the TextBox." />
   
</Grid>

private void Button1_Click(object sender, System.Windows.RoutedEventArgs e)
{
  // This function executes as a result of the user clicking the Button. It adds an FeatureLayer
  // using code-behind.
  
  // Create an FeatureLayer. The Map1 object (a Map class) was previously defined in XAML.
  ESRI.ArcGIS.Client.FeatureLayer myFeatureLayer2 = new ESRI.ArcGIS.Client.FeatureLayer();
  
  // Set the Url of the FeatureLayer to a public service. 
  myFeatureLayer2.Url = "http://server.arcgisonline.com/ArcGIS/rest/services/Demographics/USA_Unemployment_Rate/MapServer/4";
  
  // The Where clause is optional. It is necessary when more that 500/1000 records returned. In ArcGIS Server 
  // 9.3.1 and prior, the default maximum is 500 records returned per FeatureLayer. In ArcGIS Server 10 the 
  // default is 1000. This setting is configurable per map service using ArcCatalog or ArcGIS Server Manager 
  // (on the Parameters tab). In this example we use the Where clause to only return 4 features.
  myFeatureLayer2.Where = "ST_ABBREV = 'LA' OR ST_ABBREV = 'AR' OR ST_ABBREV = 'MS' OR ST_ABBREV = 'AL'";
  
  // Setting the IgnoreServiceScaleRange = True is helpful if the defined map service has restrictions on
  // different scale levels for which the features can be viewed (ex: in the ArcGIS Services Directory REST 
  // documentation these would be the 'Min. Scale' and 'Max. Scale' metadata items). The value of 
  // True always draws the features regardless of the current map scale.
  myFeatureLayer2.IgnoreServiceScaleRange = true;
  
  // Set the ID of the FeatureLayer.
  myFeatureLayer2.ID = "LA_AR_MS_AL_Unemployment_Rate";
  
  // Wire-up the Initialized Event of the FeatureLayer. Note how a different Initialized Event
  // is being used verses the one defined in XAML. They could share the same Initialized Event but we created
  // two seperate ones for demonstration purposes.
  myFeatureLayer2.Initialized += FeatureLayer_Initialized2;
  
  // Add the FeatureLayer to the Map.
  Map1.Layers.Add(myFeatureLayer2);
}
            
private void FeatureLayer_Initialized2(object sender, EventArgs e)
{
  // This function will execute as a result of the FeatureLayer that was defined in code-behind
  // being Initialized.
  
  // Get the FeatureLayer.
  ESRI.ArcGIS.Client.FeatureLayer myFeatureLayer2 = (ESRI.ArcGIS.Client.FeatureLayer)sender;
  
  // Get the ID of the FeatureLayer.
  string myID2 = myFeatureLayer2.ID;
  
  // Create a StringBuilder object to hold information about the FeatureLayer and add some
  // useful information to it.
  System.Text.StringBuilder myStringBuilder = new System.Text.StringBuilder();
  myStringBuilder.Append(TextBox1.Text + Environment.NewLine);
  myStringBuilder.Append(Environment.NewLine);
  myStringBuilder.Append("The 2nd FeatureLayer was" + Environment.NewLine);
  myStringBuilder.Append("added via code-behind and it's ID is: " + Environment.NewLine);
  myStringBuilder.Append(myID2);
  
  // Display the results of the StringBuilder text to the user.
  TextBox1.Text = myStringBuilder.ToString();
}
            
private void FeatureLayer_Initialized(object sender, System.EventArgs e)
{
  // This function will execute as a result of the FeatureLayer that was defined in XAML
  // being Initialized.
  
  // Get the FeatureLayer.
  ESRI.ArcGIS.Client.FeatureLayer myFeatureLayer = (ESRI.ArcGIS.Client.FeatureLayer)sender;
  
  // Get the ID of the FeatureLayer.
  string myID = myFeatureLayer.ID;
  
  // Create a StringBuilder object to hold information about the FeatureLayer and add some
  // useful information to it.
  System.Text.StringBuilder myStringBuilder = new System.Text.StringBuilder();
  myStringBuilder.Append("The 1st FeatureLayer was" + Environment.NewLine);
  myStringBuilder.Append("added via XAML and it's ID is: " + Environment.NewLine);
  myStringBuilder.Append(myID);
  
  // Display the results of the StringBuilder text to the user.
  TextBox1.Text = myStringBuilder.ToString();
}

Private Sub Button1_Click(sender As System.Object, e As System.Windows.RoutedEventArgs)
  
  ' This function executes as a result of the user clicking the Button. It adds an FeatureLayer
  ' using code-behind.
  
  ' Create an FeatureLayer. The Map1 object (a Map class) was previously defined in XAML.
  Dim myFeatureLayer2 As New ESRI.ArcGIS.Client.FeatureLayer
  
  ' Set the Url of the FeatureLayer to a public service. 
  myFeatureLayer2.Url = "http://server.arcgisonline.com/ArcGIS/rest/services/Demographics/USA_Unemployment_Rate/MapServer/4"
  
  ' The Where clause is optional. It is necessary when more that 500/1000 records returned. In ArcGIS Server 
  ' 9.3.1 and prior, the default maximum is 500 records returned per FeatureLayer. In ArcGIS Server 10 the 
  ' default is 1000. This setting is configurable per map service using ArcCatalog or ArcGIS Server Manager 
  ' (on the Parameters tab). In this example we use the Where clause to only return 4 features.
  myFeatureLayer2.Where = "ST_ABBREV = 'LA' OR ST_ABBREV = 'AR' OR ST_ABBREV = 'MS' OR ST_ABBREV = 'AL'"
  
  ' Setting the IgnoreServiceScaleRange = True is helpful if the defined map service has restrictions on
  ' different scale levels for which the features can be viewed (ex: in the ArcGIS Services Directory REST 
  ' documentation these would be the 'Min. Scale' and 'Max. Scale' metadata items). The value of 
  ' True always draws the features regardless of the current map scale.
  myFeatureLayer2.IgnoreServiceScaleRange = True
  
  ' Set the ID of the FeatureLayer.
  myFeatureLayer2.ID = "LA_AR_MS_AL_Unemployment_Rate"
  
  ' Wire-up the Initialized Event of the FeatureLayer. Note how a different Initialized Event
  ' is being used verses the one defined in XAML. They could share the same Initialized Event but we created
  ' two seperate ones for demonstration purposes.
  AddHandler myFeatureLayer2.Initialized, AddressOf FeatureLayer_Initialized2
  
  ' Add the FeatureLayer to the Map.
  Map1.Layers.Add(myFeatureLayer2)
  
End Sub
            
Private Sub FeatureLayer_Initialized2(sender As Object, e As EventArgs)
  
  ' This function will execute as a result of the FeatureLayer that was defined in code-behind
  ' being Initialized.
  
  ' Get the FeatureLayer.
  Dim myFeatureLayer2 As ESRI.ArcGIS.Client.FeatureLayer = CType(sender, ESRI.ArcGIS.Client.FeatureLayer)
  
  ' Get the ID of the FeatureLayer.
  Dim myID2 As String = myFeatureLayer2.ID
  
  ' Create a StringBuilder object to hold information about the FeatureLayer and add some
  ' useful information to it.
  Dim myStringBuilder As New System.Text.StringBuilder
  myStringBuilder.Append(TextBox1.Text + vbCrLf)
  myStringBuilder.Append(vbCrLf)
  myStringBuilder.Append("The 2nd FeatureLayer was" + vbCrLf)
  myStringBuilder.Append("added via code-behind and it's ID is: " + vbCrLf)
  myStringBuilder.Append(myID2)
  
  ' Display the results of the StringBuilder text to the user.
  TextBox1.Text = myStringBuilder.ToString
  
End Sub
            
Private Sub FeatureLayer_Initialized(sender As System.Object, e As System.EventArgs)
  
  ' This function will execute as a result of the FeatureLayer that was defined in XAML
  ' being Initialized.
  
  ' Get the FeatureLayer.
  Dim myFeatureLayer As ESRI.ArcGIS.Client.FeatureLayer = CType(sender, ESRI.ArcGIS.Client.FeatureLayer)
  
  ' Get the ID of the FeatureLayer.
  Dim myID As String = myFeatureLayer.ID
  
  ' Create a StringBuilder object to hold information about the FeatureLayer and add some
  ' useful information to it.
  Dim myStringBuilder As New System.Text.StringBuilder
  myStringBuilder.Append("The 1st FeatureLayer was" + vbCrLf)
  myStringBuilder.Append("added via XAML and it's ID is: " + vbCrLf)
  myStringBuilder.Append(myID)
  
  ' Display the results of the StringBuilder text to the user.
  TextBox1.Text = myStringBuilder.ToString
  
End Sub