CloudQueue.BeginDelete Method
From Storage Client Library NET API
[This topic is part of the Microsoft Azure Storage Client Library 1.7, which has been deprecated. See Storage Client Library for the latest version.]
Begins an asynchronous operation to delete the queue.
Begins an asynchronous operation to delete the queue.
Namespace: Microsoft.WindowsAzure.StorageClient
Assembly: Microsoft.WindowsAzure.StorageClient (in Microsoft.WindowsAzure.StorageClient.dll)
Usage
| Visual Basic |
|---|
Dim instance As CloudQueue Dim callback As AsyncCallback Dim state As Object Dim returnValue As IAsyncResult returnValue = instance.BeginDelete(callback, state) |
Syntax
| Visual Basic |
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Public Function BeginDelete ( _ callback As AsyncCallback, _ state As Object _ ) As IAsyncResult |
| C# |
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public IAsyncResult BeginDelete ( AsyncCallback callback, Object state ) |
| C++ |
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public: IAsyncResult^ BeginDelete ( AsyncCallback^ callback, Object^ state ) |
| J# |
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| JScript |
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Parameters
- callback
Type: System.AsyncCallback
The callback delegate that will receive notification when the asynchronous operation completes.
- state
Type: System.Object
A user-defined object that will be passed to the callback delegate.
Return Value
Type: System.IAsyncResult
An IAsyncResult that references the asynchronous operation.
Example
The following code example illustrates using state when calling BeginDelete.
| C# | Copy Code |
|---|---|
using System;
using System.Diagnostics;
using Microsoft.WindowsAzure;
using Microsoft.WindowsAzure.StorageClient;
namespace QueueAsyncExample
{
public class QueueAsyncStateExample
{
public CloudQueue queueObject;
public object customStateInformation;
// Constructor for the example state class
public QueueAsyncStateExample( CloudQueue queue, object yourAdditionalStateObject )
{
this.queueObject = queue;
this.customStateInformation = yourAdditionalStateObject;
}
// Static call that starts deleting a queue
static void DeleteQueueAsync( CloudQueue queue, object stateObject )
{
queue.BeginDelete( QueueDeleteCallback,
new QueueAsyncStateExample( queue, stateObject ) );
}
// The callback method that is called once the create-if-not-exist operation is complete
static void QueueDeleteCallback( IAsyncResult opResult )
{
QueueAsyncStateExample state = (QueueAsyncStateExample) opResult.AsyncState;
CloudQueue queue = state.queueObject;
// End the BeginDelete operation
queue.EndDelete( opResult );
// ...other asynchronous operations could be started here if appropriate
}
}
}
| |
Remarks
Note that when you delete a queue, there may be an interval of time of at least 35 seconds during which you cannot create a queue with the same name.
Thread Safety
Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.