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I am trying to display waiting message which is actually a form while long process is running in some different file. Issue i am facing is the form get disappeared once the process gets started but its still active and running the process

My code:
 Dim objWait As New frmWaitupdate
    Dim strReply As String
 
    Dim ischange As Boolean
    Dim obj1 As New MyBO.UpdateSchemaBO()
    ischange = obj1.CheckSchemaChanges(Application.ProductVersion.ToString())
 
    If ischange = True Then
 
        lblMsg.Text = "Schema changes found please wait  Please wait."
 
        obj1.AddVersionTable(Application.ProductVersion.ToString())
        Me.Visible = True
 
        strReply = obj1.UpdateSchema(Me)
        If strReply <> "" Then
            MessageBox.Show(strReply, "abc")
        Else
            MessageBox.Show("Schema updated successfully", "abc")
        End If
 

        'objWait.Hide()
    ElseIf ischange = False Then
 
        MessageBox.Show("No schema changes found", "abc")
 

        End If
 
    End If

As the process goes in UpdateSchema() which takes around 30-45 sec to finish the form gets disappear.Is there any way to keep the form intact on screen until my process gets complete??
Posted 27-Feb-13 21:00pm
Dexter111.2K
Updated 27-Feb-13 21:02pm
v2

1 solution

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Solution 1

Your problem is that your long-running code is running on the UI (startup) thread and preventing any windows messages from being processed, like WM_PAINT which causes your windows to repaint themselves.

Your solution is to move the long-running code to a background thread. You can do this in a number of different ways, like using the Thread class, the Task Parallel Library, the BackgroundWorker (suggested!) component, or what have you.
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