Hi again.

I've manage d to reproduce what appears to be an unhandled exception within the Diagramming DLL.
The following describes a situation where no exception is encountered:

1) Place a diagram on the main form, set to automatic height / width and WPFPoint measurement unit (this unit is not required as such, it just keeps the diagram small to make things easier)
2) Add a button to the form
3) In the button click event add

Diagram1.Bounds = New Rect(1, 1, Me.Height, Me.Width)

4) Run app
5) Maximise window
6) Click button

The diagram resizes as expected (well, almost as expected, as in my app the me.height and me.width didn't seem to increase after the maximize).

The following steps replicate exception:

7) Now add a new UserControl to the project and replicate the objects and code from the main form (diagram, button and click event).
8) create an instance of the new user control on the main form
9) set width and height of user control to auto, ensuring no margins
10) run app again and click the button within the usercontrol.

At this point I generally found that nothing would appear to happen but if I alt+tabbed back to VS there was an exception window waiting for me saying:

System.InvalidOperationException was unhandled
Message="Layout measurement override of element 'MindFusion.Diagramming.Wpf.Diagram' should not return NaN values as its DesiredSize."

I can post full exception stack trace if required.


Paul

Outstanding - I knew I could rely you folks

Have a good weekend.

Hi Stoyan

Using the 'Actual' values worked - thanks for the assistance.


best regards

Paul