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IInputChannel.BeginTryReceive Method

Begins an asynchronous operation to receive a message that has a specified time out and state object associated with it.

Namespace:  System.ServiceModel.Channels
Assembly:  System.ServiceModel (in System.ServiceModel.dll)

IAsyncResult BeginTryReceive(
	TimeSpan timeout,
	AsyncCallback callback,
	Object state
)

Parameters

timeout
Type: System.TimeSpan
The Timespan that specifies the interval of time to wait for a message to become available.
callback
Type: System.AsyncCallback
The AsyncCallback delegate that receives the notification of the asynchronous operation completion.
state
Type: System.Object
An object, specified by the application, that contains state information associated with the asynchronous operation.

Return Value

Type: System.IAsyncResult
The IAsyncResult that references the asynchronous receive operation.

ExceptionCondition
TimeoutException

The specified timeout is exceeded before the operation is completed.

ArgumentOutOfRangeException

The timeout specified is less than zero.

Use the asynchronous BeginTryReceive(TimeSpan, AsyncCallback, Object) method when you want the application processing to continue without waiting. Use the synchronous TryReceive(TimeSpan, Message) method when it is acceptable for the current thread to be blocked while it replies to the request message or until the timeout interval is exceeded.

The operation is not complete until either a message becomes available in the channel or the timeout occurs.

If you are going to handle timeouts and not just re-throw or wrap the TimeoutException, then you should call BeginTryReceive(TimeSpan, AsyncCallback, Object) instead of BeginReceive.

If you are not going to treat timeouts specially then just call BeginReceive, otherwise you lose error information.

Notes to Implementers

The operation returns false from EndTryReceive(IAsyncResult, Message) if the specified timeout is exceeded.

The following code illustrates how to implement this method:


public IAsyncResult BeginTryReceive(TimeSpan timeout, AsyncCallback callback, object state)
{
    TryReceiveAsyncResult<TChannel> result = new TryReceiveAsyncResult<TChannel>(this, timeout, callback, state);
    result.Begin();
    return result;
}


.NET Framework

Supported in: 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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