Question

I’ve been trying to figure out how to do this for a couple of days now.

It’s a fairly common problem so I’ll explain the situation as generically as possible so maybe others can get a bit of use out of it.

I have a list view on my WPF (using MVVM) dialog, it’s bound to an observable collection of items with, say, five properties which are displayed in seperate columns.

I call a function which iterates over all the items and changes one of their properties. This function takes a while to get through all the items so I want it to update each item as it goes.

What are the options to do this so the UI remains responsive, and which is the simplest to implement?

Answer 1

If you are using C# 4.0, use

Task.Factory.StartNew(new Action(() =>
{
    .....
     //CALL YOUR UPDATE METHOD



 })).ContinueWith( { //something to execute after, if need}..)

and when set ModelView object from other thread, use

Application.Current.Dispatcher.Invoke(new Action(() =>
{
    //set ModelView object properties here
}));