Wpf progress bar not updating

21 Apr

The full function appears here: Now to build our starting Write-Progress Bar function.

To start out we aren’t going to want to mess with re-creating every functionality of Write-Progress, so we are just going to add the ability to pass in an updated Activity which will update the title of the progress bar window and Percent Complete. So what we are going to do is modify the properties in the second runspace by using the dispatcher which is exposed in our $Sync Hash variable. The next posting we will get into replicating the exact functionality of the write-progress function as well as dealing with some of the performance issues you will see when running the below demo.

We'll take a look at another example that will bring all of these concepts together to illustrate executing a long running task on a seperate thread with a progress bar that updates the user interface via the Dispatcher object. The main window contains the following controls; A List Box control that will hold random values that are generated during the long running process.

However, there are a few concerns that you must be aware of if you plan to access values on the UI thread from the worker thread. So by using the dispatcher object from the user interface code you are able to access the user interface controls from your worker thread.

A Progress Bar control that will illustrate the progress of the long running task. It's shown when the long running process begins and is hidden again when the process has ended or is canceled.using System; using System.

The pupose of this control is to illustrate the responsiveness of the user interface during the long running process.

The control contains the following properties to control how the progress is displayed to the user. Dispatcher object is used to execute code on the UI thread from the executing worker thread. If so, I'm sure you've noticed that your user interface becomes unresponsive. You can't use any controls on the form until the process completes. It means that you cannot update you form unless your process is finished.As usual with these posts, although the specific code in the article relates to MVVM Cross, it should be applicable to any MVVM framework. The Scenario In the current game that I’m writing in MVVM Cross (yes, that’s right – a game), I have a situation where the user selects to create a “New Game” and the game world needs to be generated.