AsyncResultT Class

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An object to track the status of an operation that may be performed either synchronously or asynchronously. See remarks.

Inheritance Hierarchy

SystemObject
Telogis.GeoBase.ConcurrencyAsyncResultT

Namespace: Telogis.GeoBase.Concurrency
Assembly: geobase.net (in geobase.net.dll) Version: 4.99.0.0

Syntax

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public class AsyncResult<T> : IAsyncResult
where T : class

Public Class AsyncResult(Of T As Class)
	Implements IAsyncResult

Type Parameters

T: The type of object that will be returned by the operation.

The AsyncResultT type exposes the following members.

Constructors

	Name	Description
	AsyncResultT(AsyncCallback, Object)	Sets up an AsyncResult for an asynchronous operation.
	AsyncResultT(AsyncCallback, Object, T)	Sets up an AsyncResult for an operation that could have been asynchronous but in fact has already been performed synchronously.

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Properties

	Name	Description
	AsyncState	The user object that is associated with the operation.
	AsyncWaitHandle	A handle that may be used to wait for the operation to complete.
	CompletedSynchronously	Whether the operation completed synchronously.
	Exception	This is an exception thrown by the asynchronous operation, if any. If no exception is thrown, will be null.
	IsCompleted	Whether the operation is complete.
	Result	The result of the operation.

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Methods

	Name	Description
	Begin	Called at the beginning of a synchronous or asynchronous operation. This method will also construct an AsyncResult object from the arguments provided and return it.
	EndSynchronous	Called at the end of synchronous processing for the operation. If the operation is complete, ie SetResult has been called, then the operation was synchronous. Otherwise, the operation will be completed asynchronously.
	Equals	Determines whether the specified object is equal to the current object. (Inherited from Object.)
	GetHashCode	Serves as the default hash function. (Inherited from Object.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	SetException	Sets an exception result for this Asynchronous operation. If a result has already been set this function will re-throw an AsyncException.
	SetResult	Sets the result of the operation and calls the operation's callback.
	ToString	Returns a string that represents the current object. (Inherited from Object.)

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Examples

The typical pattern of usage is:

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public IAsyncResult BeginOperation(AsyncCallback userCallback, object userState) {
    AsyncResult<T> result = new AsyncResult<T>(userCallback, userState);
    // Call result.SetResult if the operation can be done synchronously.
    // Otherwise start a thread or similar to perform the operation.
    result.EndSynchronous();
    return result;
}

public T EndOperation(IAsyncResult result) {
    return ((AsyncResult<T>)result).Result;
}

Reference

Telogis.GeoBase.Concurrency Namespace

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Type Parameters

Reference

AsyncResultT Class