Is there any command to update UI immediately?
asynchronous, c#, dispatcher, user-interface, wpf
Solution
Please don't sleep in the UI thread. It will freeze your UI - it's a bad thing to do.
Either have a timer of some kind (use the right kind of timer and you should be able to get it to fire in your UI thread) or use a separate thread (either via `BackgroundWorker`, a new separate thread, or the `ThreadPool`) and make it call back to the UI thread to update it.
`Application.DoEvents` is a hacky workaround in WinForms, but the fact that you've mentioned a `Dispatcher` suggests you're using WPF - is that the case? The kind of timer you should use (if you want to use that solution) will depend on the UI framework you're using.
Problem
I want to update a progress bar from running 1 to 100 with this code. ``` for (int i = 0; i <= 100; i++) { System.Threading.Thread.Sleep(100); progressBar1.Value = i; } ``` But the result is, the UI freeze until looping finish. I know `Dispatcher` can help, but I don't want to split function. Is there any command to update UI immediately like.. ``` for (int i = 0; i <= 100; i++) { System.Threading.Thread.Sleep(100); progressBar1.Value = i; UpdateUINow(); } ``` Edit: I'm using WPF, and I use Thread.Sleep to simulate long running process. In fact, I want any command liked `Application.DoEvents`. But I cannot find this command in WPF.