C＃进度栏-无法将其包围

Question

I have a program that takes loops through files in a folder, creates a new folder elsewhere with that file name, then puts a common file in that folder. rinse repeat until we are done with whats in that folder (listed in a listbox).

I decided I want to be fancy and have a progress bar. I conceptually understand that I am increment the count by one (to the listbox.items.count ) for each iteration.. which I have coded and works well.

I also understand that the DoWork event is what counts for the progress bar, how do I get the two to mesh? Do I pass a counter to the DoWork for each iteration?

I am just missing the bridge from my main code loop to the DoEvents counter.

Answer 1

Use a backgroundworker as shown:

 BackgroundWorker worker = new BackgroundWorker();
 worker.WorkerReportsProgress = true;
 worker.DoWork += new DoWorkEventHandler(update_DoWork);
 worker.ProgressChanged += new ProgressChangedEventHandler(update_ProgressChanged);
 worker.RunWorkerAsync();

You need a ProgressChangedEventHandler. Then you will need to use ReportProgress when you want to update the progress bar (this will be in the DoWork method). This method will call the ProgressChangedEventHandler.

int percentProgress = 10;
worker.ReportProgress(percentProgress)

An example of a ProgressChangedEventHandler:

 private void update_ProgressChanged(object sender, ProgressChangedEventArgs e)
        {
           progressBar.Value = (e.ProgressPercentage);
        }