Progressbars in WPF

Question

I'm developing a tool which does the following operations:

• Download a zip file from a repository
• Extract the zip file.
• Run 5-6 exe/bat files from the extracted contents as separate Process.

I need to show a progress bar with approximate percentage completions for these operations. What would be the best way to do this?

Answer 1

What do you use to realize each point? Which libraries?

• If you use some external, compiled libraries, you can catch the output and parse it:

  var proc = new Process {
      StartInfo = new ProcessStartInfo {
          FileName = "program.exe",
          Arguments = "command line arguments to your executable",
          UseShellExecute = false,
          RedirectStandardOutput = true,
          CreateNoWindow = true
      }
  };
  

And start the process:

proc.Start();
while (!proc.StandardOutput.EndOfStream) {
    string line = proc.StandardOutput.ReadLine();
    // parse your output
}

• When you download a file, you can use just a simple pattern:

bytes_already_downloaded/bytes_total * 100 = download_progress_in_%

• If you use some classes (you have source code), you can create a callback action:

  public void DoSomethingMethod(Action<int> progressCallback)
  {
      while(true)
      {
          // do something here
          // return the progress
          int progress = stuff_done / stuff_total * 100;
          progressCallback(progress);
      }
  }
  

And how to use it?

MyClass.DoSomethingMethod(delegate(int i) { progressBar.Progress = i; });

Or just:

MyClass.DoSomethingMethod(i => progressBar.Progress = i);

If you mean something else, you can specify it in the comment. I will try to answer:)