troubleshooting Question

Web Service Call - Progress Bar with BackGroundWorker Not Working As Intended VB.NET

Avatar of Lynchie435
Lynchie435 asked on
.NET ProgrammingVisual Basic.NETWCF
3 Comments1 Solution993 ViewsLast Modified:
I am creating an application in VB.NET where users are able to attach XML via an OpenFileDialog and fire it at the Web Service.

I wish to have a progress bar at the bottom as at the moment, the GUI hangs and users think it has crashed while it is waiting for a response.

My code is below:

Private Sub Button3_Click(sender As Object, e As EventArgs) Handles Button3.Click


        If hubURLtxtbx.Text = "LIVE" Then
        End If

    End Sub

    Private Sub My_BgWorker_DoWork(ByVal sender As Object, ByVal e As System.ComponentModel.DoWorkEventArgs) Handles BackgroundWorker1.DoWork

        For i As Integer = 0 To GlobalVariables.m_CountTo
            ' Has the background worker be told to stop?
            If BackgroundWorker1.CancellationPending Then
                ' Set Cancel to True
                e.Cancel = True
                Exit For
            End If
            System.Threading.Thread.Sleep(1000) ' Sleep for 1 Second
            ' Report The progress of the Background Worker.
            BackgroundWorker1.ReportProgress(CInt((i / GlobalVariables.m_CountTo) * 100))
    End Sub

    Private Sub BackgroundWorker1_ProgressChanged(ByVal sender As Object, _
 ByVal e As System.ComponentModel.ProgressChangedEventArgs) _
 Handles BackgroundWorker1.ProgressChanged

        If GlobalVariables.response = "" Then
            ProgBar.Value = e.ProgressPercentage
            ProgBar.Value = 100
        End If

    End Sub

    Private Sub BackgroundWorker1_RunWorkerCompleted(ByVal sender As Object, _
 ByVal e As System.ComponentModel.RunWorkerCompletedEventArgs) _
 Handles BackgroundWorker1.RunWorkerCompleted
        If e.Cancelled Then
        End If
    End Sub

    Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click    
        ' Is the Background Worker do some work?
        If BackgroundWorker1.IsBusy Then
            'If it supports cancellation, Cancel It
            If BackgroundWorker1.WorkerSupportsCancellation Then
                ' Tell the Background Worker to stop working.
            End If
        End If
    End Sub

Basically at the moment with the code as above the progress bar is updating AFTER I have received the XML response from the web service.

I want to have it so that the call is made and when the call is made the progress is updating, then when the call is successfully the bar is completely full?

Can anyone shed any light on this for me at all please?

On debug it appears the 'hanging' is when the XStreamUAT/XStreamLIVE Sub is called and it uses the Web Service Reference Client Object to send the XML to the Service.


Join our community to see this answer!
Unlock 1 Answer and 3 Comments.
Start Free Trial
Learn from the best

Network and collaborate with thousands of CTOs, CISOs, and IT Pros rooting for you and your success.

Andrew Hancock - VMware vExpert
See if this solution works for you by signing up for a 7 day free trial.
Unlock 1 Answer and 3 Comments.
Try for 7 days

”The time we save is the biggest benefit of E-E to our team. What could take multiple guys 2 hours or more each to find is accessed in around 15 minutes on Experts Exchange.

-Mike Kapnisakis, Warner Bros