Public Property UseTime As Boolean

public bool UseTime {get; set;}

<Grid x:Name="LayoutRoot">
  
  <!-- Add a Map Control. -->
  <esri:Map Name="Map1" HorizontalAlignment="Left" VerticalAlignment="Top"   
            Margin="14,240,0,0" Height="350" Width="500" WrapAround="True"
            Extent="-13641670,4536157,-13616982,4553439">
    <esri:Map.Layers>
      <esri:LayerCollection>
        
        <!-- Add a backdrop ArcGISTiledMapServiceLayer. -->
        <esri:ArcGISTiledMapServiceLayer 
          Url="http://services.arcgisonline.com/ArcGIS/rest/services/World_Imagery/MapServer" />
         
        <!-- 
        Add an ArcGISDynamicMapServiceLayer. The layer displays trees maintained in San Francisco. Because
        the amomut od data points in the service is large, a LayerDefinition has been applied such that only 
        those trees with and numerical ID value of less that 500 will be drawn in the Map. The Initialized 
        event is wired up to display the TimeExtents for which the trees will be displayed as well as count 
        of the number of occurances displayed in the Map. The DisableClientCaching is set to true which means 
        all Rendering logic will be handled on ArcGIS Server. The LayerDefinition takes precidence over other 
        data restriction types of queries like the LayerTimeOptions.
        -->
        <esri:ArcGISDynamicMapServiceLayer ID="SanFranciscoTrees" 
                  Url="http://servicesbeta.esri.com/ArcGIS/rest/services/SanFrancisco/SFStreetTreesRendered/MapServer"
                  DisableClientCaching="True" Initialized="ArcGISDynamicMapServiceLayer_Initialized">
          <esri:ArcGISDynamicMapServiceLayer.LayerDefinitions>
            <esri:LayerDefinition LayerID="0" Definition="TreeID < 500"/>
          </esri:ArcGISDynamicMapServiceLayer.LayerDefinitions>
        </esri:ArcGISDynamicMapServiceLayer>
        
      </esri:LayerCollection>
    </esri:Map.Layers>
  </esri:Map>
    
  <!-- Display the TimeExtent information being used by the Map Control. -->
  <sdk:Label Height="21" HorizontalAlignment="Left" Margin="12,111,0,0" Name="Label_TimeExtent_Start" 
             VerticalAlignment="Top" Width="120" Content="Map.TimeExtent.Start:"/>
  <TextBox Height="23" HorizontalAlignment="Left" Margin="140,106,0,0" Name="TextBox_TimeExtent_Start" 
           VerticalAlignment="Top" Width="374" />
  <sdk:Label Height="21" HorizontalAlignment="Left" Margin="12,146,0,0" Name="Label_TimeExtent_End" 
             VerticalAlignment="Top" Width="120" Content="Map.TimeExtent.End:"/>
  <TextBox Height="23" HorizontalAlignment="Left" Margin="140,144,0,0" Name="TextBox_TimeExtent_End" 
           VerticalAlignment="Top" Width="374" />
  <TextBlock Height="23" HorizontalAlignment="Left" Margin="12,109,0,0" Name="TextBlock_Ignored" Visibility="Visible" 
             Text="---------------------------------------------- I G N O R E D --------------------------------------" 
             VerticalAlignment="Top" Width="502" Foreground="Red" FontFamily="Arial" FontSize="14"/>
  <TextBlock Height="23" HorizontalAlignment="Left" Margin="14,144,0,0" Name="TextBlock_Ignored2" Visibility="Visible" 
             Text="---------------------------------------------- I G N O R E D --------------------------------------" 
             VerticalAlignment="Top" Width="502" Foreground="Red" FontFamily="Arial" FontSize="14"/>
  
  <!-- 
  Allow the user to change the ArcGISDynamicMapServiceLayer's UseTime options.
  If UseTime = True then the data in the ArcGISDynamicMapServiceLayer returned is based upon occurrences 
  between the TimeExtent.Start and TimeExtent.End of the Map Control.
  If UseTime = False then time based queries are disabled for the ArcGISDynamicMapServiceLayer (meaning all 
  of the records will be returned subject to any LayerDefinitons that may be set). 
  -->
  <sdk:Label Height="22" HorizontalAlignment="Left" Margin="14,180,0,0" Name="Label_UseTime" 
             VerticalAlignment="Top" Width="120" Content="UseTime:" />
  <RadioButton Content="True" Height="16" HorizontalAlignment="Left" Margin="72,181,0,0" 
               Name="rb_UseTime_True" VerticalAlignment="Top" />
  <RadioButton Content="False" Height="16" HorizontalAlignment="Left" Margin="123,181,0,0" 
               Name="rb_UseTime_False" VerticalAlignment="Top" IsChecked="True"/>
  
  <!--
  Display the number of features that are returned as a result of changing the ArcGISDynamicMapServiceLayer's 
  UseTime options.
  -->
  <sdk:Label Content="Number of Features:" Height="23" HorizontalAlignment="Left" Margin="284,181,0,0" 
             Name="Label_NumberOfFeatures" VerticalAlignment="Top" Width="120" />
  <TextBox Height="23" HorizontalAlignment="Left" Margin="401,176,0,0" Name="TextBox_NumberOfFeatures" 
           VerticalAlignment="Top" Width="113" />
  
  <!-- Add a button to demonstrate changing the ArcGISDynamicServiceLayer's UseTime options. -->
  <Button Content="Apply ArcGISDynamicMapServiceLayer.LayerTimeOptions" Height="23" HorizontalAlignment="Left" 
          Margin="14,207,0,0" Name="Button1" VerticalAlignment="Top" Width="500" Click="Button1_Click"/>
  
  <!-- Provide the instructions on how to use the sample code. -->
  <TextBlock Height="100" HorizontalAlignment="Left" Name="TextBlock1" VerticalAlignment="Top" Width="788" TextWrapping="Wrap" 
   Text="When the application loads all trees maintained in the San Francisco database with an ID less that 500 will be 
         displayed. Choose the different UseTime RadioButton options to see what effect occurs in the features being drawn in 
         the Map (and their count). When UseTime = True the data in the ArcGISDynamicMapServiceLayer returned is based upon 
         occurrences between the TimeExtent.Start (1/1/2000) and TimeExtent.End (12/31/2000) of the Map Control and will 
         display 4 features. When UseTime = False then time based queries are disabled for the ArcGISDynamicMapServiceLayer 
         (meaning all of the records will be returned subject to any LayerDefinitons that may be set) and will display 171 features." />
  
</Grid>

private void Button1_Click(object sender, System.Windows.RoutedEventArgs e)
{
  // Get the ArcGISDynamicMapServiceLayer.
  ESRI.ArcGIS.Client.ArcGISDynamicMapServiceLayer myArcGISDynamicMapServiceLayer = null;
  myArcGISDynamicMapServiceLayer = (ESRI.ArcGIS.Client.ArcGISDynamicMapServiceLayer)(Map1.Layers["SanFranciscoTrees"]);
  
  // Create a new LayerTimeOptionCollection object.
  ESRI.ArcGIS.Client.LayerTimeOptionCollection myLayerTimeOptionCollection = new ESRI.ArcGIS.Client.LayerTimeOptionCollection();
  
  // Create a new TimeOption object. You can have multiple TimeOption objects; one for each FeatureLayer in
  // the ArcGISDynamicMapServicelayer.
  ESRI.ArcGIS.Client.Tasks.TimeOption myTimeOption1 = new ESRI.ArcGIS.Client.Tasks.TimeOption();
  
  // This the Layer ID from REST. Although the .LayerID property accepts a string you need to give it the integer 
  // value of a specific FeatureLayer in the ArcGISDynamicMapServiceLayer. 
  myTimeOption1.LayerId = Convert.ToString(0);
  
  // Create some variables used to obtain a count of the number of features returned via a QueryTask. The QueryTask
  // will approximate the same SQL syntax that is used by the ArcGISDynamicMapServiceLayer's TimeDataCumulative Property.
  string mySqlQuery = null;
  string mySubLayer_LayerDefinition = myArcGISDynamicMapServiceLayer.LayerDefinitions[0].Definition;
  
  // If TimeDataCumulative = False then all the features from the beginning of Map.TimeExtent.Start to 
  // Map.TimeExtent.End are returned.
  myTimeOption1.TimeDataCumulative = false;
  
  if (rb_UseTime_True.IsChecked == true)
  {
    //mySqlQuery = "TreeID < 500 AND PlantDate >= '1/1/2001' AND PlantDate <= '12/31/2001'"
    mySqlQuery = mySubLayer_LayerDefinition + " AND PlantDate >= '" + TextBox_TimeExtent_Start.Text + "' AND PlantDate <= '" + TextBox_TimeExtent_End.Text + "'";
    TextBlock_Ignored.Visibility =  System.Windows.Visibility.Collapsed;
    TextBlock_Ignored2.Visibility =  System.Windows.Visibility.Collapsed;
    myTimeOption1.UseTime = true;
  }
  else if (rb_UseTime_False.IsChecked == true)
  {
    //mySqlQuery = "TreeID < 500"
    mySqlQuery = mySubLayer_LayerDefinition;
    TextBlock_Ignored.Visibility =  System.Windows.Visibility.Visible;
    TextBlock_Ignored2.Visibility =  System.Windows.Visibility.Visible;
    myTimeOption1.UseTime = false;
  }
  
  // Add the various options for the TimeOption into the LayerTimeOptionCollection. Note: you could have multiple TimeOption
  // objects and set the various values independently -- i.e. the ArcGISDynamicMapServiceLayer could have multiple
  // FeatureLayers each that is Time enabled.
  myLayerTimeOptionCollection.Add(myTimeOption1);
  
  // Set the ArcGISDynamicMalServiceLayer.LayerTimeOptions to the custom LayerTimeOptionCollection.
  myArcGISDynamicMapServiceLayer.LayerTimeOptions = myLayerTimeOptionCollection;
  
  // Create a TimeExtent object based upon what the user specifies for a TimeExtent.Start and TimeExtent.End.
  ESRI.ArcGIS.Client.TimeExtent myTimeExtent = new ESRI.ArcGIS.Client.TimeExtent(Convert.ToDateTime(TextBox_TimeExtent_Start.Text), Convert.ToDateTime(TextBox_TimeExtent_End.Text));
  
  // Set the Map.TimeExtent which will cause the ArcGISDynamicMapServiceLayer to re-render based upon the
  // new TimeExtent values.
  Map1.TimeExtent = myTimeExtent;
  
  // Display the number of features being returned in the ArcGISDynamicMapServiceLayer.
  GetFeatureCount(mySqlQuery);
}
  
private void ArcGISDynamicMapServiceLayer_Initialized(object sender, System.EventArgs e)
{
  // Set the values that the Map Control will use for the TimeExtent.
  TextBox_TimeExtent_Start.Text = Convert.ToString(new DateTime(2000, 1, 1));
  TextBox_TimeExtent_End.Text = Convert.ToString(new DateTime(2000, 12, 31));
  
  // Create a SQL query that will perform QueryTask that approximates the same SQL syntax that is used by 
  // the ArcGISDynamicMapServiceLayer's UseTime Property.
  ESRI.ArcGIS.Client.ArcGISDynamicMapServiceLayer myArcGISDynamicMapServiceLayer = (ESRI.ArcGIS.Client.ArcGISDynamicMapServiceLayer)sender;
  string mySubLayer_LayerDefinition = myArcGISDynamicMapServiceLayer.LayerDefinitions[0].Definition;
  GetFeatureCount(mySubLayer_LayerDefinition);
}
  
private void GetFeatureCount(string sqlQuery)
{
  // This function approximates the same SQL syntax that is used by  the ArcGISDynamicMapServiceLayer's 
  // UseTime Property and displays the feature count back to the user.
  
  // Get the ArcGISDynamicMapServicelayer.
  ESRI.ArcGIS.Client.ArcGISDynamicMapServiceLayer myArcGISDynamicMapServiceLayer = null;
  myArcGISDynamicMapServiceLayer = (ESRI.ArcGIS.Client.ArcGISDynamicMapServiceLayer)(Map1.Layers["SanFranciscoTrees"]);
  
  // Get the Url of the ArcGISDynamicMapServiceLayer. 
  string myUrl = myArcGISDynamicMapServiceLayer.Url;
  
  // Get the ID of the SanFranciscoTrees sub-layer.
  int mySubLayerID = myArcGISDynamicMapServiceLayer.Layers[0].ID;
  
  // Create a Query. Use the Map's Extent and SpatialReference. Return all the fields. 
  ESRI.ArcGIS.Client.Tasks.Query myQuery = new ESRI.ArcGIS.Client.Tasks.Query();
  myQuery.Geometry = Map1.Extent;
  myQuery.OutSpatialReference = Map1.SpatialReference;
  myQuery.OutFields.Add("*");
  myQuery.Where = sqlQuery;
  
  // Create a QueryTask using the correct Url and Query Parameters.
  ESRI.ArcGIS.Client.Tasks.QueryTask myQueryTask = new ESRI.ArcGIS.Client.Tasks.QueryTask();
  //queryTask.Url = "http://servicesbeta.esri.com/ArcGIS/rest/services/SanFrancisco/SFStreetTreesRendered/MapServer/0"
  myQueryTask.Url = myUrl + "/" + mySubLayerID.ToString();
  myQueryTask.ExecuteAsync(myQuery);
  
  // Add the Event Handler for the Asynchronous QueryTask request.
  myQueryTask.ExecuteCompleted += myQueryTask_ExecuteCompleted;
}
  
private void myQueryTask_ExecuteCompleted(object sender, ESRI.ArcGIS.Client.Tasks.QueryEventArgs e)
{
  // Check to ensure we have valid return results.
  if (e.FeatureSet == null)
  {
    return;
  }
  
  // Obtain a FeatureSet from the queryArgs returned from the web service.
  ESRI.ArcGIS.Client.Tasks.FeatureSet myFeatureSet = e.FeatureSet;
  
  // Get the Features from the FeatureSet.
  System.Collections.Generic.IList<ESRI.ArcGIS.Client.Graphic> myFeatures = myFeatureSet.Features;
  
  // Display the number of features returned from the QueryTask.
  int myCount = myFeatures.Count;
  TextBox_NumberOfFeatures.Text = myCount.ToString();
}

Private Sub Button1_Click(sender As System.Object, e As System.Windows.RoutedEventArgs)
  
  ' Get the ArcGISDynamicMapServiceLayer.
  Dim myArcGISDynamicMapServiceLayer As ESRI.ArcGIS.Client.ArcGISDynamicMapServiceLayer
  myArcGISDynamicMapServiceLayer = CType(Map1.Layers("SanFranciscoTrees"), ESRI.ArcGIS.Client.ArcGISDynamicMapServiceLayer)
  
  ' Create a new LayerTimeOptionCollection object.
  Dim myLayerTimeOptionCollection As New ESRI.ArcGIS.Client.LayerTimeOptionCollection
  
  ' Create a new TimeOption object. You can have multiple TimeOption objects; one for each FeatureLayer in
  ' the ArcGISDynamicMapServicelayer.
  Dim myTimeOption1 As New ESRI.ArcGIS.Client.Tasks.TimeOption
  
  ' This the Layer ID from REST. Although the .LayerID property accepts a string you need to give it the integer 
  ' value of a specific FeatureLayer in the ArcGISDynamicMapServiceLayer. 
  myTimeOption1.LayerId = CStr(0)
  
  ' Create some variables used to obtain a count of the number of features returned via a QueryTask. The QueryTask
  ' will approximate the same SQL syntax that is used by the ArcGISDynamicMapServiceLayer's TimeDataCumulative Property.
  Dim mySqlQuery As String = Nothing
  Dim mySubLayer_LayerDefinition As String = myArcGISDynamicMapServiceLayer.LayerDefinitions(0).Definition
  
  ' If TimeDataCumulative = False then all the features from the beginning of Map.TimeExtent.Start to 
  ' Map.TimeExtent.End are returned.
  myTimeOption1.TimeDataCumulative = False
  
  If rb_UseTime_True.IsChecked = True Then
    'mySqlQuery = "TreeID < 500 AND PlantDate >= '1/1/2001' AND PlantDate <= '12/31/2001'"
    mySqlQuery = mySubLayer_LayerDefinition + " AND PlantDate >= '" + TextBox_TimeExtent_Start.Text + "' AND PlantDate <= '" + TextBox_TimeExtent_End.Text + "'"
    TextBlock_Ignored.Visibility = Windows.Visibility.Collapsed
    TextBlock_Ignored2.Visibility = Windows.Visibility.Collapsed
    myTimeOption1.UseTime = True
    
  ElseIf rb_UseTime_False.IsChecked = True Then
    'mySqlQuery = "TreeID < 500"
    mySqlQuery = mySubLayer_LayerDefinition
    TextBlock_Ignored.Visibility = Windows.Visibility.Visible
    TextBlock_Ignored2.Visibility = Windows.Visibility.Visible
    myTimeOption1.UseTime = False
  End If
  
  ' Add the various options for the TimeOption into the LayerTimeOptionCollection. Note: you could have multiple TimeOption
  ' objects and set the various values independently -- i.e. the ArcGISDynamicMapServiceLayer could have multiple
  ' FeatureLayers each that is Time enabled.
  myLayerTimeOptionCollection.Add(myTimeOption1)
  
  ' Set the ArcGISDynamicMalServiceLayer.LayerTimeOptions to the custom LayerTimeOptionCollection.
  myArcGISDynamicMapServiceLayer.LayerTimeOptions = myLayerTimeOptionCollection
   
  ' Create a TimeExtent object based upon what the user specifies for a TimeExtent.Start and TimeExtent.End.
  Dim myTimeExtent As New ESRI.ArcGIS.Client.TimeExtent(CDate(TextBox_TimeExtent_Start.Text), CDate(TextBox_TimeExtent_End.Text))
  
  ' Set the Map.TimeExtent which will cause the ArcGISDynamicMapServiceLayer to re-render based upon the
  ' new TimeExtent values.
  Map1.TimeExtent = myTimeExtent
  
  ' Display the number of features being returned in the ArcGISDynamicMapServiceLayer.
  GetFeatureCount(mySqlQuery)
  
End Sub
            
Private Sub ArcGISDynamicMapServiceLayer_Initialized(sender As System.Object, e As System.EventArgs)
  
  ' Set the values that the Map Control will use for the TimeExtent.
  TextBox_TimeExtent_Start.Text = CStr(New Date(2000, 1, 1))
  TextBox_TimeExtent_End.Text = CStr(New Date(2000, 12, 31))
  
  ' Create a SQL query that will perform QueryTask that approximates the same SQL syntax that is used by 
  ' the ArcGISDynamicMapServiceLayer's UseTime Property.
  Dim myArcGISDynamicMapServiceLayer As ESRI.ArcGIS.Client.ArcGISDynamicMapServiceLayer = CType(sender, ESRI.ArcGIS.Client.ArcGISDynamicMapServiceLayer)
  Dim mySubLayer_LayerDefinition As String = myArcGISDynamicMapServiceLayer.LayerDefinitions(0).Definition
  GetFeatureCount(mySubLayer_LayerDefinition)
  
End Sub
            
Private Sub GetFeatureCount(sqlQuery As String)
  
  ' This function approximates the same SQL syntax that is used by  the ArcGISDynamicMapServiceLayer's 
  ' UseTime Property and displays the feature count back to the user.
  
  ' Get the ArcGISDynamicMapServicelayer.
  Dim myArcGISDynamicMapServiceLayer As ESRI.ArcGIS.Client.ArcGISDynamicMapServiceLayer
  myArcGISDynamicMapServiceLayer = CType(Map1.Layers("SanFranciscoTrees"), ESRI.ArcGIS.Client.ArcGISDynamicMapServiceLayer)
  
  ' Get the Url of the ArcGISDynamicMapServiceLayer. 
  Dim myUrl As String = myArcGISDynamicMapServiceLayer.Url
  
  ' Get the ID of the SanFranciscoTrees sub-layer.
  Dim mySubLayerID As Integer = myArcGISDynamicMapServiceLayer.Layers(0).ID
  
  ' Create a Query. Use the Map's Extent and SpatialReference. Return all the fields. 
  Dim myQuery As New ESRI.ArcGIS.Client.Tasks.Query
  myQuery.Geometry = Map1.Extent
  myQuery.OutSpatialReference = Map1.SpatialReference
  myQuery.OutFields.Add("*")
  myQuery.Where = sqlQuery
  
  ' Create a QueryTask using the correct Url and Query Parameters.
  Dim myQueryTask As New ESRI.ArcGIS.Client.Tasks.QueryTask
  'queryTask.Url = "http://servicesbeta.esri.com/ArcGIS/rest/services/SanFrancisco/SFStreetTreesRendered/MapServer/0"
  myQueryTask.Url = myUrl + "/" + mySubLayerID.ToString
  myQueryTask.ExecuteAsync(myQuery)
  
  ' Add the Event Handler for the Asynchronous QueryTask request.
  AddHandler myQueryTask.ExecuteCompleted, AddressOf myQueryTask_ExecuteCompleted
  
End Sub
            
Private Sub myQueryTask_ExecuteCompleted(sender As Object, e As ESRI.ArcGIS.Client.Tasks.QueryEventArgs)
  
  ' Check to ensure we have valid return results.
  If e.FeatureSet Is Nothing Then
    Return
  End If
  
  ' Obtain a FeatureSet from the queryArgs returned from the web service.
  Dim myFeatureSet As ESRI.ArcGIS.Client.Tasks.FeatureSet = e.FeatureSet
  
  ' Get the Features from the FeatureSet.
  Dim myFeatures As System.Collections.Generic.IList(Of ESRI.ArcGIS.Client.Graphic) = myFeatureSet.Features
  
  ' Display the number of features returned from the QueryTask.
  Dim myCount As Integer = myFeatures.Count
  TextBox_NumberOfFeatures.Text = myCount.ToString
  
End Sub