BeginEvaluateExpression Method (evaluateExpressionRequest, callback, state)

Initiates the asynchronous execution of the EvaluateExpression operation.

Declaration Syntax

IAsyncResult BeginEvaluateExpression(
	EvaluateExpressionRequest evaluateExpressionRequest,
	AsyncCallback callback,
	Object state
)

Parameters

evaluateExpressionRequest (EvaluateExpressionRequest): Container for the necessary parameters to execute the EvaluateExpression operation on AmazonDataPipeline.

callback (AsyncCallback): An AsyncCallback delegate that is invoked when the operation completes.

state (Object): A user-defined state object that is passed to the callback procedure. Retrieve this object from within the callback procedure using the AsyncState property.

Return Value

An IAsyncResult that can be used to poll or wait for results, or both; this value is also needed when invoking EndEvaluateExpression operation.