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SQL Anywhere 11.0.1 » UltraLite - .NET Programming » UltraLite .NET 2.0 API reference » ULCommand class » BeginExecuteReader methods


BeginExecuteReader(AsyncCallback, Object, CommandBehavior) method

Initiates the asynchronous execution of a SQL statement that is described by this ULCommand, using one of the CommandBehavior values, and retrieves the result set, given a callback procedure and state information.

Visual Basic
Public Function BeginExecuteReader( _
   ByVal callback As AsyncCallback, _
   ByVal stateObject As Object, _
   ByVal cmdBehavior As CommandBehavior _
) As IAsyncResult
public IAsyncResult BeginExecuteReader(
   AsyncCallback callback,
   object stateObject,
   CommandBehavior cmdBehavior
  • callback   A System.AsyncCallback delegate that is invoked when the command's execution has completed. Pass null (Nothing in Microsoft Visual Basic) to indicate that no callback is required.

  • stateObject   A user-defined state object that is passed to the callback procedure. Retrieve this object from within the callback procedure using the System.IAsyncResult.AsyncState property.

  • cmdBehavior   A bitwise combination of System.Data.CommandBehavior flags describing the results of the query and its effect on the connection. UltraLite.NET respects only the System.Data.CommandBehavior.Default, System.Data.CommandBehavior.CloseConnection, and System.Data.CommandBehavior.SchemaOnly flags.

Return value

A System.IAsyncResult that can be used to poll, wait for results, or both is returned; this value is also needed when invoking EndExecuteReader(IAsyncResult), which returns an ULDataReader instance that can be used to retrieve the returned rows.

See also