Public Sub CancelJobStatusUpdates( _
   ByVal jobId As String _
) 

public void CancelJobStatusUpdates( 
   string jobId
)

<Grid x:Name="LayoutRoot" Background="White">
  <esri:Map Background="White" HorizontalAlignment="Left" Margin="14,368,0,0" 
            Name="MyMap" VerticalAlignment="Top" WrapAround="True" Height="222" Width="600"
            Extent="-14130480,2889032,-7273626,6317460">
    <esri:Map.Layers>
      <esri:LayerCollection>
      
        <!-- Add a layer to the Map Control. -->
        <esri:ArcGISDynamicMapServiceLayer ID="MyArcGISDynamicMapServiceLayer"
          Url="http://services.arcgisonline.com/ArcGIS/rest/services/Demographics/USA_1990-2000_Population_Change/MapServer"/>
        
      </esri:LayerCollection>
    </esri:Map.Layers>
  </esri:Map>
  
  <!-- Url -->
  <sdk:Label Height="20" HorizontalAlignment="Left" Margin="8,100,0,0" Name="Label_Url" 
             VerticalAlignment="Top" Width="31" Content="Url:"/>
  <TextBox Height="23" HorizontalAlignment="Left" Margin="8,118,0,0" Name="TextBox_Url" 
           VerticalAlignment="Top" Width="605" FontSize="10" />
  
  <!-- Buttons to perform the work. -->
  <Button Content="SubmitJobAsync|CancelJobStatusUpdates" Height="72" HorizontalAlignment="Left" Margin="8,162,0,0" 
          Name="Button_SubmitJobAsync" VerticalAlignment="Top" Width="253" Click="Button_SubmitJobAsync_Click" IsEnabled="True"/>
  <Button Content="Get Job via Geoprocessor" Height="71" Width="253" HorizontalAlignment="Left" Margin="8,242,0,0" 
          Name="Button_GeoProcessor" VerticalAlignment="Top" Click="Button_GeoProcessor_Click" IsEnabled="False"/>
  
  <!-- JobInfo -->
  <sdk:Label Height="16" HorizontalAlignment="Left" Margin="13,328,0,0" Name="Label_JobId" VerticalAlignment="Top" 
             Width="35" Content="JobId:"/>
  <TextBlock Height="16" HorizontalAlignment="Left" Margin="14,346,0,0" Name="TextBlock_JobId" 
             VerticalAlignment="Top" Width="247" />
            
  <!-- Informational Messages -->
  <sdk:Label Height="21" HorizontalAlignment="Left" Margin="267,147,0,0" Name="Label_InfoMessage" 
             VerticalAlignment="Top" Width="169" Content="Informatonal Messages:"/>
  <ListBox Height="200" HorizontalAlignment="Left" Margin="267,162,0,0" Name="ListBox_InfoMessage" 
           VerticalAlignment="Top" Width="346" />
  
  <!-- Provide the instructions on how to use the sample code. -->
  <TextBlock Height="91" HorizontalAlignment="Left" Name="TextBlock1" VerticalAlignment="Top" Width="625" 
     TextWrapping="Wrap" Text="When the application loads, enter a correct Url to an ArcGIS Server PrintTask 
      based on an 'asynchronous geoprocessing task'. Then click the 'SubmitJobAsync|CancelJobStatusUpdates' 
      button (this will start a Print Task, obtain a JobID, and cancel all Job Status Updates from occuring). 
      Then click the 'Get Job via Geoprocessor' to obtain the image started by the PrintTask via the 
      Geoprocessor." />
      
</Grid>

// Create Global (aka. Member) variables for the PrintTask and Geoprocessor objects that will be 
// used in other parts of the application.
private ESRI.ArcGIS.Client.Printing.PrintTask _PrintTask;
private ESRI.ArcGIS.Client.Tasks.Geoprocessor _Geoprocessor;
            
public MainPage()
{
  InitializeComponent();
  
  // Provide a valid PrintTask.Url for a "asynchronous geoprocessing task"
  TextBox_Url.Text = "http://localhost:6080/arcgis/rest/services/Utilities/PrintingTools/GPServer/Export20Web20Map%20Task";
  
  // Set the _PrintTask variable to a new instance of the PrintTask Class.
  _PrintTask = new ESRI.ArcGIS.Client.Printing.PrintTask();
  
  // Prevent the internet browser from using a cache for the PrintTask operations.
  _PrintTask.DisableClientCaching = true;
  
  // Set the PrintTask.Url from what is entered in the TextBox.
  _PrintTask.Url = TextBox_Url.Text;
  
  // Wire up an Event Handler for the PrintTask.StatusUpdated Event.
  _PrintTask.StatusUpdated += printTask_StatusUpdated;
  
  // Set the _Geoprocessor variable to a new instance of the Geoprocessor Class.
  _Geoprocessor = new ESRI.ArcGIS.Client.Tasks.Geoprocessor();
  
  // Set the Geoprocessor.Url from what is entered in the TextBox.
  _Geoprocessor.Url = TextBox_Url.Text;
  
  // Wire up an Event Handler for the Geoprocessor.StatusUpdated Event.
  _Geoprocessor.StatusUpdated += geoprocessor_StatusUpdated;
  
  // Wire up an Event Handler for the Geoprocessor.GetResultDataCompleted Event.
  _Geoprocessor.GetResultDataCompleted += geoprocessor_GetResultDataCompleted;
}
            
private void Button_SubmitJobAsync_Click(object sender, System.Windows.RoutedEventArgs e)
{
  // Define the settings for rendering the image/.pdf on the ArcGIS Server.
  
  // Define the ExportOptions.
  ESRI.ArcGIS.Client.Printing.ExportOptions myExportOptions = new ESRI.ArcGIS.Client.Printing.ExportOptions();
  myExportOptions.Dpi = 96; //96 DPI is typical Window OS setting.
  myExportOptions.OutputSize = new Size(MyMap.ActualWidth, MyMap.ActualHeight); // Use the dimensions of the Map
  
  // Define the PrintParameters. 
  ESRI.ArcGIS.Client.Printing.PrintParameters myPrintParameters = new ESRI.ArcGIS.Client.Printing.PrintParameters(MyMap);
  myPrintParameters.ExportOptions = myExportOptions; // Use the ExportOptions defined earlier.
  myPrintParameters.LayoutTemplate = "MAP_ONLY"; // Look to the REST service to see what layout templates are supported.
  myPrintParameters.Format = "PNG32"; // Look to the REST service to see what image formats are supported.
  
  // Submit the 'PrintTask based asynchronous geoprocessing task' to ArcGIS Server. 
  _PrintTask.SubmitJobAsync(myPrintParameters);
  
  // Enable the Button for the user to retieve the ArcGIS Server exported image/.pdf via the Geoprocessor.
  Button_GeoProcessor.IsEnabled = true;
  
  // Display an informational message.
  ListBox_InfoMessage.Items.Add("The PrintTask to generate the image was started.");
}
            
private void printTask_StatusUpdated(object sender, ESRI.ArcGIS.Client.Tasks.JobInfoEventArgs e)
{
  // Use only for SubmitJobAsync operations (i.e. asynchronous geoprocessing tasks).
  
  // This Event fires as a result of the PrintTask.SumbitJobAsync Method being used previously. It 
  // can fire multiple times depending on the state of the geoprocessing task executing.
  
  // Clear out the TextBlock any existing JobInfo messages.
  TextBlock_JobId.Text = "";
  
  // Get the JobInfo information messages.
  ESRI.ArcGIS.Client.Tasks.JobInfo myJobInfo = e.JobInfo;
  string myJobId = myJobInfo.JobId;
  
  // Display the JobInfo messages to the user.
  TextBlock_JobId.Text = myJobId;
  
  // Display an informational message.
  ListBox_InfoMessage.Items.Add("The PrintTask JobId was obtained.");
  
  // As soon as we get our first update on the Job in this Event, call the PrintTask.CancelJobStatusUpdates 
  // which will kill all future PrintTask.StatusUpdated Events (i.e. this Event) from firing. NOTE: the actual
  // PrintTask job is still submitted to the ArcGIS Server geoprocessor and is running/completed.
  _PrintTask.CancelJobStatusUpdates(TextBlock_JobId.Text);
  
  // Display some informational messages.
  ListBox_InfoMessage.Items.Add("All PrintTask messages have now been canceled.");
  ListBox_InfoMessage.Items.Add("And yet the ArcGIS Server PrintTask is still running.");
  ListBox_InfoMessage.Items.Add("Click the 'Get Job via Geoprocessor' to retrive the image.");
}
            
private void Button_GeoProcessor_Click(object sender, System.Windows.RoutedEventArgs e)
{
  // We can no longer use the PrintTask Class to find out information about the "asynchronous geoprocessing task"
  // that was submitted via the PrintTask.SubmitJobAsync() Method because the PrintTask.CancelJobStatusUpdates was 
  // issued. We now need to use the Geoprocessor Class to find out information about the job by supplying the JobId 
  // obtained in the last PrintTask.StatusUpdated Event.
  // A common work flow for this type of situation might be a really long PrintTask job where the user needs to 
  // close out of the application before the job completes. If the JobId was stored on disk or saved via some other
  // mechanism, the image could still be retrieved via the Geoprocessor Class.
  _Geoprocessor.CheckJobStatusAsync(TextBlock_JobId.Text);
}
            
private void geoprocessor_StatusUpdated(object sender, ESRI.ArcGIS.Client.Tasks.JobInfoEventArgs e)
{
  // This Event fires as a result of the Geoprocessor.CheckJobStatusAsync Method call.
  
  // Get the JobInfo.
  ESRI.ArcGIS.Client.Tasks.JobInfo myJobInfo = e.JobInfo;
  
  // Ensure we have valid results.
  if (myJobInfo != null)
  {
    // Get the JobStatus from the JobInfo.
    ESRI.ArcGIS.Client.Tasks.esriJobStatus myJobStatus = myJobInfo.JobStatus;
    
    // The PrintTask operation that generates the image completed.
    if (myJobStatus == ESRI.ArcGIS.Client.Tasks.esriJobStatus.esriJobSucceeded)
    {
      // Display an informational message.
      ListBox_InfoMessage.Items.Add("The image file was found via the Geoprocessor.");
      
      // Invoke the Geoprocessor.GetResultDataAsync Method so we can retrieve the image.
      // The string parameter "Output_File" was obtained from the 'ArcGIS REST Service Directory' 
      // for the Url of the PrintTask and Geoprocessor services. Look for the 'Parameter' that is 
      // of 'Direction' esriGPParameterDirectionOutput.
      _Geoprocessor.GetResultDataAsync(TextBlock_JobId.Text, "Output_File");
    }
  }
}
            
private void geoprocessor_GetResultDataCompleted(object sender, ESRI.ArcGIS.Client.Tasks.GPParameterEventArgs e)
{
  // Get the GPDataFile from the e.Parameter.
  ESRI.ArcGIS.Client.Tasks.GPDataFile myGPDataFile = e.Parameter as ESRI.ArcGIS.Client.Tasks.GPDataFile;
  
  // Make sure we have a valid result.
  if (myGPDataFile != null)
  {
    // Get the Url String.
    string myUrl = myGPDataFile.Url;
    
    // Create a Uri from the Url String.
    Uri myUri = new Uri(myUrl);
    
    // Open a new internet browser window with the generated image from the PrintTask.
    System.Windows.Browser.HtmlPage.Window.Navigate(myUri, "_blank");
    
    // Display an informational message.
    ListBox_InfoMessage.Items.Add("The image file was returned in a web browser.");
  }
}

' Create Global (aka. Member) variables for the PrintTask and Geoprocessor objects that will be 
' used in other parts of the application.
Private _PrintTask As ESRI.ArcGIS.Client.Printing.PrintTask
Private _Geoprocessor As ESRI.ArcGIS.Client.Tasks.Geoprocessor
            
Public Sub New()
            
  InitializeComponent()
  
  ' Provide a valid PrintTask.Url for a "asynchronous geoprocessing task"
  TextBox_Url.Text = "http://localhost:6080/arcgis/rest/services/Utilities/PrintingTools/GPServer/Export20Web20Map%20Task"
  
  ' Set the _PrintTask variable to a new instance of the PrintTask Class.
  _PrintTask = New ESRI.ArcGIS.Client.Printing.PrintTask()
  
  ' Prevent the internet browser from using a cache for the PrintTask operations.
  _PrintTask.DisableClientCaching = True
  
  ' Set the PrintTask.Url from what is entered in the TextBox.
  _PrintTask.Url = TextBox_Url.Text
  
  ' Wire up an Event Handler for the PrintTask.StatusUpdated Event.
  AddHandler _PrintTask.StatusUpdated, AddressOf printTask_StatusUpdated
  
  ' Set the _Geoprocessor variable to a new instance of the Geoprocessor Class.
  _Geoprocessor = New ESRI.ArcGIS.Client.Tasks.Geoprocessor
  
  ' Set the Geoprocessor.Url from what is entered in the TextBox.
  _Geoprocessor.Url = TextBox_Url.Text
  
  ' Wire up an Event Handler for the Geoprocessor.StatusUpdated Event.
  AddHandler _Geoprocessor.StatusUpdated, AddressOf geoprocessor_StatusUpdated
  
  ' Wire up an Event Handler for the Geoprocessor.GetResultDataCompleted Event.
  AddHandler _Geoprocessor.GetResultDataCompleted, AddressOf geoprocessor_GetResultDataCompleted
  
End Sub
            
Private Sub Button_SubmitJobAsync_Click(sender As System.Object, e As System.Windows.RoutedEventArgs)
  
  ' Define the settings for rendering the image/.pdf on the ArcGIS Server.
  
  ' Define the ExportOptions.
  Dim myExportOptions As New ESRI.ArcGIS.Client.Printing.ExportOptions
  myExportOptions.Dpi = 96 '96 DPI is typical Window OS setting.
  myExportOptions.OutputSize = New Size(MyMap.ActualWidth, MyMap.ActualHeight) ' Use the dimensions of the Map
  
  ' Define the PrintParameters. 
  Dim myPrintParameters As New ESRI.ArcGIS.Client.Printing.PrintParameters(MyMap)
  myPrintParameters.ExportOptions = myExportOptions ' Use the ExportOptions defined earlier.
  myPrintParameters.LayoutTemplate = "MAP_ONLY" ' Look to the REST service to see what layout templates are supported.
  myPrintParameters.Format = "PNG32" ' Look to the REST service to see what image formats are supported.
  
  ' Submit the 'PrintTask based asynchronous geoprocessing task' to ArcGIS Server. 
  _PrintTask.SubmitJobAsync(myPrintParameters)
  
  ' Enable the Button for the user to retieve the ArcGIS Server exported image/.pdf via the Geoprocessor.
  Button_GeoProcessor.IsEnabled = True
  
  ' Display an informational message.
  ListBox_InfoMessage.Items.Add("The PrintTask to generate the image was started.")
  
End Sub
  
Private Sub printTask_StatusUpdated(sender As Object, e As ESRI.ArcGIS.Client.Tasks.JobInfoEventArgs)
  
  ' Use only for SubmitJobAsync operations (i.e. asynchronous geoprocessing tasks).
  
  ' This Event fires as a result of the PrintTask.SumbitJobAsync Method being used previously. It 
  ' can fire multiple times depending on the state of the geoprocessing task executing.
  
  ' Clear out the TextBlock any existing JobInfo messages.
  TextBlock_JobId.Text = ""
  
  ' Get the JobInfo information messages.
  Dim myJobInfo As ESRI.ArcGIS.Client.Tasks.JobInfo = e.JobInfo
  Dim myJobId As String = myJobInfo.JobId
  
  ' Display the JobInfo messages to the user.
  TextBlock_JobId.Text = myJobId
  
  ' Display an informational message.
  ListBox_InfoMessage.Items.Add("The PrintTask JobId was obtained.")
  
  ' As soon as we get our first update on the Job in this Event, call the PrintTask.CancelJobStatusUpdates 
  ' which will kill all future PrintTask.StatusUpdated Events (i.e. this Event) from firing. NOTE: the actual
  ' PrintTask job is still submitted to the ArcGIS Server geoprocessor and is running/completed.
  _PrintTask.CancelJobStatusUpdates(TextBlock_JobId.Text)
  
  ' Display some informational messages.
  ListBox_InfoMessage.Items.Add("All PrintTask messages have now been canceled.")
  ListBox_InfoMessage.Items.Add("And yet the ArcGIS Server PrintTask is still running.")
  ListBox_InfoMessage.Items.Add("Click the 'Get Job via Geoprocessor' to retrive the image.")
  
End Sub
  
Private Sub Button_GeoProcessor_Click(sender As System.Object, e As System.Windows.RoutedEventArgs)
  
  ' We can no longer use the PrintTask Class to find out information about the "asynchronous geoprocessing task"
  ' that was submitted via the PrintTask.SubmitJobAsync() Method because the PrintTask.CancelJobStatusUpdates was 
  ' issued. We now need to use the Geoprocessor Class to find out information about the job by supplying the JobId 
  ' obtained in the last PrintTask.StatusUpdated Event.
  ' A common work flow for this type of situation might be a really long PrintTask job where the user needs to 
  ' close out of the application before the job completes. If the JobId was stored on disk or saved via some other
  ' mechanism, the image could still be retrieved via the Geoprocessor Class.
  _Geoprocessor.CheckJobStatusAsync(TextBlock_JobId.Text)
  
End Sub
            
Private Sub geoprocessor_StatusUpdated(sender As Object, e As ESRI.ArcGIS.Client.Tasks.JobInfoEventArgs)
  
  ' This Event fires as a result of the Geoprocessor.CheckJobStatusAsync Method call.
  
  ' Get the JobInfo.
  Dim myJobInfo As ESRI.ArcGIS.Client.Tasks.JobInfo = e.JobInfo
  
  ' Ensure we have valid results.
  If myJobInfo IsNot Nothing Then
    
    ' Get the JobStatus from the JobInfo.
    Dim myJobStatus As ESRI.ArcGIS.Client.Tasks.esriJobStatus = myJobInfo.JobStatus
    
    ' The PrintTask operation that generates the image completed.
    If myJobStatus = ESRI.ArcGIS.Client.Tasks.esriJobStatus.esriJobSucceeded Then
      
      ' Display an informational message.
      ListBox_InfoMessage.Items.Add("The image file was found via the Geoprocessor.")
      
      ' Invoke the Geoprocessor.GetResultDataAsync Method so we can retrieve the image.
      ' The string parameter "Output_File" was obtained from the 'ArcGIS REST Service Directory' 
      ' for the Url of the PrintTask and Geoprocessor services. Look for the 'Parameter' that is 
      ' of 'Direction' esriGPParameterDirectionOutput.
      _Geoprocessor.GetResultDataAsync(TextBlock_JobId.Text, "Output_File")
      
    End If
    
  End If
  
End Sub
            
Private Sub geoprocessor_GetResultDataCompleted(sender As Object, e As ESRI.ArcGIS.Client.Tasks.GPParameterEventArgs)
  
  ' Get the GPDataFile from the e.Parameter.
  Dim myGPDataFile As ESRI.ArcGIS.Client.Tasks.GPDataFile = TryCast(e.Parameter, ESRI.ArcGIS.Client.Tasks.GPDataFile)
  
  ' Make sure we have a valid result.
  If myGPDataFile IsNot Nothing Then
    
    ' Get the Url String.
    Dim myUrl As String = myGPDataFile.Url
    
    ' Create a Uri from the Url String.
    Dim myUri As New Uri(myUrl)
    
    ' Open a new internet browser window with the generated image from the PrintTask.
    System.Windows.Browser.HtmlPage.Window.Navigate(myUri, "_blank")
    
    ' Display an informational message.
    ListBox_InfoMessage.Items.Add("The image file was returned in a web browser.")
    
  End If
  
End Sub