Wpf treeview observablecollection not updating scott baio dating nicole eggert

Posted by / 04-Dec-2017 11:48

Wpf treeview observablecollection not updating

Binding Expression: Path=Show Price; Data Item=null; target element is ‘Data Grid Text Column’ (Hash Code=32685253); target property is ‘Visibility’ (type ‘Visibility’) But none of these workarounds seems to work, we always get the same result…

At this point, it seems that the only viable approach would be to change the column visibility in code-behind, which we usually prefer to avoid when using the MVVM pattern…

Today I saw a question in the Composite WPF forum that was asking for a way to show 40000 entries in a WPF List View, with Databinding, in a fast manner since the user’s application was taking to long to load all the employees.

Therefore, I started doing some digging and found out that UI Virtualization could do the trick.

But I’m not going to give up so soon, at least not while there are other options to consider 😉 The solution to our problem is actually quite simple, and takes advantage of the even when they’re not in the visual or logical tree.

I don’t know the exact mechanism that enables this behavior, but we’re going to take advantage of it to make our binding work…

We will temporarily add a few “fake” workbooks to the Excel View Model: Now that the tree structure is in place, let’s hook it up to the control.

We will expose the add-in functionality to the Anakin View user control through one class, the Anakin View Model; it will handle the actions received from the user through the Anakin View, and transform data coming from Excel in a format suitable for user interface consumption.

However, in some cases the is not accessible: it happens for elements that are not part of the visual or logical tree.The shell of our control is ready – today we will fill the Tree View with all the open workbooks and worksheets.We will use a common design pattern in WPF: we will create objects that act as intermediary between the user interface and the domain objects.Dynamic Data Display 2.0 is a set of Silverlight controls for adding interactive visualization of dynamic data to your Silverlight application.It allows to create line graphs, bubble charts, heat maps and other complex 2D plots which are very common in scientific software.

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