Progress Bar

Sean89

I have the following callback function which I am using to update a progress bar. The only problem is, when I change the value of the progress bar, the bar doesnt change:confused: It just shoots to 100 when it is done. I have tried using Application.DoEvents(); .

    private Int32 CopyInProgress(uint TotalFileSize, uint BytesTransfered, uint StreamSize, uint StreamBytesTransfered, uint DwStreamNumber, long dwCallbackReason, long hSourceFile, long hDestinationFile, long lpData)
    {
        float t = TotalFileSize;
		float bt = StreamSize;
			
	    int nPercent = (int)(bt/t)\* 100;

        percentComp.Text = nPercent.ToString() + "%";

        progressBar.Value = nPercent;
       
        Application.DoEvents();

        return PROGRESS\_CONTINUE;
    }

Any ideas why this is happening?

Sean :)

Phil C

Yup, I got an idea. You are converting a float (bt/t) into an int...then multiplying it by 100. By definition, when you make it an int in this manner the answer can only be 0 or 100 and nothing in between. try changing it to: int nPercent = (int)(bt/t*100); :)

Rob Philpott

Nicely spotted! I was trying to find a reason why the message couldn't have reached the control. Tuh! Regards, Rob Philpott.

Phil C

Not a problem. Even a crusty old C programmer gets to get one right once in a while. The rest of the time I'm generally walking around C# and .NET like a complete idiot because so many of the rules have been changed that there's not a lot of advantage to having programmed for 20+ years...LOL. Score: Cprogrammers = 1; WhizKids = INT_MAX; :)

Sean89

Hey thanks a lot ;)

Sean :)