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(VB.NET) Get the LastErrorText for an Asynchronous Method CallSee more Async ExamplesDemonstrates how to get the LastErrorText information for a Chilkat method called asynchronously.
' This example requires the Chilkat API to have been previously unlocked. ' See Global Unlock Sample for sample code. Dim socket As New Chilkat.Socket ' The Async call simply creates the task. The "Connect" method has not yet been called. Dim maxWaitMs As Integer = 5000 ' Let's intentionally cause this connect to fail by giving it an invalid domain.. Dim task As Chilkat.Task = socket.ConnectAsync("amazonbladflakjsdflksadjf.com",443,True,maxWaitMs) If (socket.LastMethodSuccess = False) Then Debug.WriteLine(socket.LastErrorText) Exit Sub End If ' Start the background thread to run the task. Dim success As Boolean = task.Run() If (Not success) Then Debug.WriteLine(task.LastErrorText) Exit Sub End If ' The application is now free to do anything else ' For this example, we'll simply sleep and periodically ' check to see if the Socket Connect if finished. While task.Finished <> True ' Sleep 1 ms. task.SleepMs(1) End While ' If the task completed, it means the method (in this case the Connect method) was called and returned success or failure. If (task.StatusInt <> 7) Then Debug.WriteLine("Task did not complete.") Debug.WriteLine("task status: " & task.Status) Exit Sub End If ' Get the success/failure of the Connect ' (This is the return value of the Connect method had it been called synchronously) success = task.GetResultBool() If (success = False) Then ' Get the LastErrorText for the Connect method call. ' Had we called Connect synchronously, we would've simply accessed the socket object's LastErrorText property. ' Instead, we get the task object's ResultErrorText. Debug.WriteLine(task.ResultErrorText) Else Debug.WriteLine("Connect succeeded.") End If |
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