WorkflowQueue.Count Property
Definition
Important
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Gets the number of items contained in the WorkflowQueue.
public:
property int Count { int get(); };
public int Count { get; }
member this.Count : int
Public ReadOnly Property Count As Integer
Property Value
The number of items in the workflow queue.
Examples
The following code example demonstrates how you can create a WorkflowQueue by calling the WorkflowQueuingService.GetWorkflowQueue method. It also uses the Count property to determine whether any messages exist in the current queue. Finally, the code uses the Dequeue method to remove and return the first object in the queue.
This code example is part of the File Watcher Activity SDK Sample from the FileSystemEvent.cs file. For more information, see File System Watcher Activity.
private bool ProcessQueueItem(ActivityExecutionContext context)
{
WorkflowQueuingService qService = context.GetService<WorkflowQueuingService>();
if (!qService.Exists(this.QueueName))
{
return false;
}
WorkflowQueue queue = qService.GetWorkflowQueue(this.QueueName);
// If the queue has messages, then process the first one
if (queue.Count == 0)
{
return false;
}
FileWatcherEventArgs e = (FileWatcherEventArgs)queue.Dequeue();
// Raise the FileSystemEvent
base.RaiseGenericEvent<FileWatcherEventArgs>(FileSystemEvent.FileWatcherEventHandlerEvent, this, e);
DoUnsubscribe(context, this);
DeleteQueue(context);
return true;
}
Private Function ProcessQueueItem(ByVal context As ActivityExecutionContext) As Boolean
Dim qService As WorkflowQueuingService = context.GetService(Of WorkflowQueuingService)()
If Not qService.Exists(Me.QueueName) Then
Return False
End If
Dim Queue As WorkflowQueue = qService.GetWorkflowQueue(Me.QueueName)
' If the queue has messages, then process the first one
If Queue.Count = 0 Then
Return False
End If
Dim e As FileWatcherEventArgs = CType(Queue.Dequeue(), FileWatcherEventArgs)
' Raise the FileSystemEvent
MyBase.RaiseGenericEvent(Of FileWatcherEventArgs)(FileSystemEvent.FileWatcherEventHandlerEvent, Me, e)
DoUnsubscribe(context, Me)
DeleteQueue(context)
Return True
End Function
Applies to
See also
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