Listbox not updating when datasource changes wpf Feee chat sex person com
I've tried Update()ing the List Box and Refresh()ing the List Box, but that does nothing. But is there any simple function that can just make the Data Source update?I even tried deriving and calling the Refresh Items() protected member, which sometimes works, but sometimes when I do that the program crashes saying that I have accessed corrupted memory (in C#? I think the way to update the List Box might have something to do with the protected Data Manager member, but I don't know how to use that. Your way seems a little hackey, and it also destroys the user's selection (although I guess you could store Selected Index before reseting the Data Source and then reset Selected Index).This automatically fires events and updates the Data Source whenever an item is added/removed/editted. :) Original post by alex_myrpg I've had the same problem myself before, and the solution is actually quite simple, it's just not immediately obvious because you have to recast the appropriate object before you get the method you want.((Currency Manager)my List Box. Refresh(); That's the one line bit of code to refresh your listbox with new data from the Data Source.Another rather different solution is to use a Binding List as the data source. That's what happens when I type the code out directly here without testing it, but I'm glad you found the solution easily from there.There are two different scenarios that you may or may not want to handle when dealing with data source changes: Changes to the list of items and changes in the bound properties in each of the data objects.
Another rather different solution is to use a Binding List as the data source.
This automatically fires events and updates the Data Source whenever an item is added/removed/editted. Here's your MSDN article (at least the most appropriate one I could find): luck...
So far in this tutorial, we have mostly created bindings between UI elements and existing classes, but in real life applications, you will obviously be binding to your own data objects.
The Observable Collection on the other hand is very easy to deal with - it simply requires you to use this specific list type in those situations where you want changes to the source list reflected in a binding destination.
The Name property represents the name of the control, which is a unique identifier of a control.