Question

Im building a wpf app with the composite application block (“prism”) V2, and Im having an issue where a user control that is injected by a module is very slow in rendering. The user control contains a datagrid with some 2000 rows in it and there is considerable lag in the control rendering to the screen. Initially I thought the slowness was due to the wpf toolkit datagrid control itself but this is not the case. When I move the control containing the datagrid (TestControl) out of the external module and into the shell project and load it straight from there the control renders immediately without any problems.

Im using the following code in the implementation of IModule in my module to inject the wpf user control into the shell

 this.regionManager.RegisterViewWithRegion("mainRegion", typeof(TestControl));

Is there performance issues when loading controls from other modules in a prism app? Whats the most optimal way to load them in?

Thanks

Answer 1

the problem here seemed to be wpf being slow to update when the UI is being updated vai the dispatcher from a background thread. I took up the conversation on codeplex and got it more or less sorted.

http://compositewpf.codeplex.com/Thread/View.aspx?ThreadId=64113