Telerik Window

Showing the progress of your application gives the user a better experience. They can continue with other tasks and still see where your app is up to.

Adding this for a regular WPF Window is quite simple, you can create a TaskbarItemInfo in markup:

<Window.TaskbarItemInfo>
    <TaskbarItemInfo x:Name="taskBarItemInfo" />
</Window.TaskbarItemInfo>

The ProgressValue takes a double between 0 – 1 where 0 has no green bar and 1 is a full bar.
The ProgressState takes an enum of TaskbarItemProgressState which can be:

TaskbarItemProgressState Enum

So setting the ProgressState to normal, and the ProgressValue to .50

taskbarItemInfo.ProgressState = TaskbarItemProgressState.Normal;
taskbarItemInfo.ProgressValue = .5;

Will look like this:

Taskbar with half bar

We can then set the ProgressValue to update according to the task we’re processing and set the ProgressState back to none when done.

The RadWindow though does not expose a TaskbarItemInfo property. It is primarily a child window, and whilst it can used as a main Window it does not have all the properties a regular WPF Window has.
To get around this issue we need to tap into the parent of the RadWindow, this is a regular WPF Window. Then we can set the TaskbarItemInfo up on that.

private void ShowProgressInTaskbar() {
  Dispatcher.Invoke(() => {
    Window window = this.ParentOfType<Window>();
    if (window != null) {
      window.TaskbarItemInfo = new() {
        ProgressState = TaskbarItemProgressState.Normal,
        ProgressValue = .5
      };
    }
  });
}

We need to invoke the dispatcher since the code is running on a different thread than the UI. If your setting the ProgressValue elsewhere then that will also need to be wrapped in a Dispatcher.Invoke:

while ((read = input.Read(buffer, 0, buffer.Length)) > 0) {
  output.Write(buffer, 0, read);
  totalRead += read;
  int megabytesRead = totalRead / 1024 / 1024;
  ProgressValue = megabytesRead * 100 / megabytesTotal;
  BusyContent = title + Environment.NewLine + $"Saving {megabytesRead} MB / {megabytesTotal} MB ...";
  Dispatcher.Invoke(() => {
    Window.TaskbarItemInfo.ProgressValue = Math.Round(ProgressValue / 100d, 2);
  });
}

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