CODEWITHSUNDEEP
c#asp.netvb.netprocessprogress-bar
Sijav
Sijav

Reputation: 1525

how to show progress bar in vb.net asp.net while process long

I had a SQL Stored Procedure that get a mbd file and import it using itself in less than 3 second but because of the security of the shared server I can't do it anymore but instead I can use vb.net to import necessary temp tables to Sql server and continue the process
Unfortunately it gets so long to complete the process (about 3 minutes for a 3MegaByte mdb file), and I need to show client the process so the client can wait patiently and know how far the process has gone.
I have seen many things related to this but they are all showing an image loading instead of exact progress bar,
My question is: Is there any possible way to show the progress bar while based on how the process is doing?
PS: I can place the show progress percent in my for loop in vb.net.

EDIT: To be specific I just need to know how can I show the client the progress and just update the progress bar in html or maybe change the progress bar width style?

Thanks

Upvotes: 0

Views: 2981

Answers (1)

Avi Turner
Avi Turner

Reputation: 10456

You can use a BackGroundWorker:

When using backgroundWorker, it is always convenient for me to use @Keith template

BackgroundWorker bw = new BackgroundWorker { WorkerReportsProgress = true };

bw.DoWork += (sender, e) => 
   {
       //what happens here must not touch the form
       //as it's in a different thread

       //Here you should call the function that does the heavy, slow work.
       //pass the BackgroundWorker instance (bw) as an argument
   };

bw.ProgressChanged += ( sender, e ) =>
   {
       //update progress bars here
   };

bw.RunWorkerCompleted += (sender, e) => 
   {
       //now you're back in the UI thread you can update the form
       //remember to dispose of bw now
   };

worker.RunWorkerAsync();

In you function update about the progress by using something like:

    void YourFunction(BackgroundWorker bw)
    {
        for (int i = 0; i < length; i++)
        {
            //do your work
            int percent = (i / length) * 100;
            bw.ReportProgress(percent);
        }
    }

Upvotes: 1

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