Wpf itemssource not updating

If I were rating the technical level of each post in this series, I would put this particular post somewhere in the range of moderate to advanced (but still very approachable :)).

The Items Collection (a.k.a, the , that make up the logical content of the control. (I will use the terms “Items collection” and “Item Collection” interchangeably.) The “Type” of each item within the Items collection is Object.

The code snippet below also show some C# specific techniques, namely: anonymous delegates and extension methods.

Is your m_Variable List implementing INotify Collection Changed?

| this answer answered Jun 17 '09 at Tony Borres 1,196 8 9 Thanks, Tony.

So, I have this WPF datagrid, and it's quite happy in the way it works. Some background, I'm not doing the base behavior for editing/adding, but rather have a separate control outside the grid which is responsible for that behavior (as it is also the control responsible for adding the initial element).

All my internet searches actually shows how to do this using background thread - it is the approach that needs to be taken in a proper programming context, however there are times when you just want to do something quick & dirty or you want to augment an existing app / port where you don't want to introduce new elements.

There are also considerations to be made when both UI and worker thread access the same data, especially with regard to data binding (see my post about collection change not supporting multi-threading out of the box).

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So, I expected something similar (if not exactly the same) to also be present in WPF; much to my surprise, there is no equivalent.We will look at how this works shortly, but before we do, we should look at the simpler, non-databound (or ) scenario…Item Collection Modes: Direct and Items Source Although the Items property is read only, the provided collection is not necessarily read only.Essentially changing the text of a label (or sophisticatedly we can say a text-based progress bar).In my past coding with MFC and Win Forms, it's fairly easy enough, you just invalidate and do an update (Invalidate / Update Window in MFC or Invalidate / Update in Win Forms).