Wpf update listview from another thread

I hope you've come away from this with a real grasp of the Dispatcher and how it can be applied to your personal projects in the future. If you've enjoyed the article, which I hope you have, please apply your knowledge to enliven the code in your projects. If you have any questions or just want to connect, follow these links. Twitter LinkedIn Happy coding folks. View All. Rikam Palkar Updated date Jun 02, As the name suggests single-threaded apartment contains only a single thread.

At runtime WPF application automatically creates a new dispatcher object and calls its run method. You can use the Invoke method of Dispatcher class and pass anonymous method or your method call. Now if you run your program, you'll get no error: See the following image shows breakpoint has reached the access point where we were getting error previously.

Now Invoke method runs synchronously, meaning it will wait until our Login method finishes its execution, then it will move forward with its execution. Twitter LinkedIn. Next Recommended Reading. Net Core 6. All Windows Forms controls are not thread-safe, including ours.

This doesn't mean that you can't use threading. While you must make changes to the UI on the main thread, you can possibly do other activities on a background thread, which you would then be able to use on the main thread. For example, you might build your list on a background thread, without that list being bound to WinListView. When your thread is complete, you can pass that list back to the main thread, and from there bind it to the control. I find the following article on MSDN to be a good resource for learning about the risks of threading in Windows Forms, and the variety of ways to use multiple threads safely: Safe, Simple Multithreading in Windows Forms.

That's exactly what I needed to know! I usually can figure it out once I'm pointed in the right direction! Never had to do anything with threads before!

Thanks a bunch!! Ok so I read the article and I've modified my code I'll paste it below. The second thread fires off that scans the disk for files and it calls a delegate to update the winlistview if invokerequired is true which it always is. It works awesome for the most part with one exception. If I resize the window while it is scanning, it crashes. Not every time, but most of the time. The thing that stinks is that when this crash occurs, there is no debug information. It only does this when I resize the window.

If I comment out the "Items. Add", the program will never crash. But with that in there it crashes. Sometimes it even crashes when another window pops up on top of my application ie, someone IMs me on Yahoo and it pops up in the middle of the screen, wham, my application crashes.

Add a comment. Active Oldest Votes. Usually I'm doing it like this: using System; using System. IsDisposed control. Disposing return; if control. Telanar Telanar 3 3 silver badges 5 5 bronze badges. Community Bot 1 1 1 silver badge. Thorsten Dittmar Thorsten Dittmar My application is windows form, how can I use the Invoke methode to populate a listview — XandrUu.

The same way you would modify in control on your windows form by using the Invoke method within ISynchronizeInvoke and Dispatcher. ToArray ; listView1. BitTickler BitTickler 8, 3 3 gold badges 28 28 silver badges 47 47 bronze badges.

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