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kevp75Flag for United States of America

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WinForm Progress Bar

I have 2 forms.  1 is the main form, which grabs some files, concatenates them together, then runs a seperate method to compress them using YUI Compressor.

The second form, is simply a ProgressBar form, that I fire up using .ShowDialog in the main routine

What I am trying to do is make the progress bar show progress during the compression process (because it takes a little bit),
but I don't seem to be doing it correctly, as all that shows it the blank progress bar.

default values of the control are Minimum =0 and Maximum = 100

Here's the code for the compressor sub:
 
Private Sub CompressTheFile(ByVal _TheFilePath As String)
        Dim _Progress As New Progress()
        _Progress.ShowDialog()
        Using _p As New Process
            With _p
                .StartInfo.FileName = "cmd.exe"
                .StartInfo.Arguments = "/C java -jar " & My.Application.Info.DirectoryPath & "\yuicompressor-2.4.6.jar " & _TheFilePath & " -o " & _TheFilePath
                .StartInfo.RedirectStandardOutput = True
                .StartInfo.UseShellExecute = False
                .StartInfo.CreateNoWindow = True
                .Start()
                For i = 0 To 10
                    Threading.Thread.Sleep(1)
                    _Progress.ProgressBar.Value += 1
                    _Progress.ProgressBar.Update()
                Next
                .WaitForExit()
            End With
        End Using
        _Progress.Close()
    End Sub

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How can I make this work?
Avatar of Jacques Bourgeois (James Burger)
Jacques Bourgeois (James Burger)
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Your Progress Bar form is _Progress, isn't it?

You are displaying it with ShowDialog. ShowDialog freezes the procedure until the form is closed. So you procedure does not even run when the form is on the screen.

Use Show instead.
Avatar of kevp75

ASKER

Ok.   Yes, _Progress is the Progress Bar form.

Ok, well...  now it's not freezing anymore LOL, but still no progress shown
Avatar of kevp75

ASKER

Ok.  I got it to work by changing the for loop to this:
For i = 0 To 100
                    Threading.Thread.Sleep(50)
                    _Progress.ProgressBar.Value = i
                    _Progress.ProgressBar.Update()
                Next

however, on some longer processes, the progress bar stops before the process is completed....  so, how do I get it to keep going until the process is completed?
ASKER CERTIFIED SOLUTION
Avatar of Mike Tomlinson
Mike Tomlinson
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Hehe...remove my line #9...  ;)
Avatar of kevp75

ASKER

But I really want to fire off the calculator ;o)

Much tthanks!!!