dotConnect for Dynamics 365 Documentation
Devart.Common Namespace / DbCommandBase Class / EndExecuteNonQuery Method
The System.IAsyncResult returned by BeginExecuteNonQuery.
Example

EndExecuteNonQuery Method
Ends an asynchronous invocation of the ExecuteNonQuery method.
Syntax
'Declaration
 
Public Function EndExecuteNonQuery( _
   ByVal result As IAsyncResult _
) As Integer
 

Parameters

result
The System.IAsyncResult returned by BeginExecuteNonQuery.

Return Value

For UPDATE, INSERT, and DELETE statements, the return value is the number of rows affected by the command. For all other types of statements, the return value is -1.
Remarks
The function ends an asynchronous execution of a query that is started with BeginExecuteNonQuery. A pair of asynchronous functions (BeginExecuteNonQuery and EndExecuteNonQuery) can be used instead of the synchronous function ExecuteNonQuery to gain more performance and flexibility in your application.

Refer to "Asynchronous Query Execution" article for detailed information.

Example
In the example below an easiest way of executing an asynchronous operation is shown. First, all components are set up and a connection is opened. Second, a query execution is started. The operation state (done or in progress) is checked and a report is written to the console. At last query result is rendered.
static void Async_Exec(DbConnectionBase myConnection)
{
  DbCommandBase myCommand = (DbCommandBase)myConnection.CreateCommand();
  myCommand.CommandText = "INSERT INTO Contact (FirstName,LastName) VALUES ('John','Smith')";
  Console.WriteLine("Starting asynchronous query execution...");
  myConnection.Open();
  IAsyncResult cres = myCommand.BeginExecuteNonQuery(null, null);
  if (cres.IsCompleted)
    Console.WriteLine("Completed.");
  else
    Console.WriteLine("Have to wait for operation to complete...");
  try
  {
    int RowsAffected = myCommand.EndExecuteNonQuery(cres);
    Console.WriteLine("Done. Rows affected: " + RowsAffected.ToString());
  }
  catch (Exception e)
  {
    Console.WriteLine("An exception has occurred: " + e.Message);
  }
  finally
  {
    myConnection.Close();
  }
}
Public Sub Async_Exec(ByVal myConnection As DbConnectionBase)
  Dim myCommand As DbCommandBase = myConnection.CreateCommand()
  myCommand.CommandText = "INSERT INTO Contact (FirstName,LastName) VALUES ('John','Smith')"
  Console.WriteLine("Starting asynchronous query execution...")
  myConnection.Open()
  Dim cres As IAsyncResult = myCommand.BeginExecuteNonQuery(Nothing, Nothing)
  If cres.IsCompleted Then
    Console.WriteLine("Completed.")
  Else
    Console.WriteLine("Have to wait for operation to complete...")
  End If
  Try
    Dim RowsAffected As Integer = myCommand.EndExecuteNonQuery(cres)
    Console.WriteLine(String.Concat("Rows affected: ", RowsAffected.ToString()))
  Catch e As Exception
    Console.WriteLine(String.Concat("An exception has occurred: ", e.Message))
  Finally
    myConnection.Close()
  End Try
End Sub
Requirements

Target Platforms: 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

See Also