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Normal Topic Custom class inherited from DiagramLink (Read 2123 times)
binuvc
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Custom class inherited from DiagramLink
Nov 17th, 2011 at 11:21am
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Hi,
I tried the following scenarion where i have created a custom class LinkElement inherited from DiagramLink.

public partial class LinkElement : MindFusion.Diagramming.Silverlight.DiagramLink
    {
       public LinkElement()
           : base()
       {
           InitializeComponent();
       }
    }

When I try to add this to my diagram it is throwing an object reference exception

diagramLite.Items.Add(new LinkElement());

StackTrace :

   at MindFusion.Diagramming.Silverlight.DiagramLink.x7bad83d86d80fec5()
   at MindFusion.Diagramming.Silverlight.Diagram.x329b27fa9b90943a(DiagramItem xccb63ca5f63dc470)
   at MindFusion.Diagramming.Silverlight.Diagram.x5921718e79c67372(DiagramItem xccb63ca5f63dc470)
   at MindFusion.Diagramming.Silverlight.Diagram.x847065cd3dd0f60f(Object xe0292b9ed559da7d, ItemEventArgs`1 xfbf34718e704c6bc)
   at MindFusion.Diagramming.Silverlight.CollectionBase`2.RaiseAdding(T item)
   at MindFusion.Diagramming.Silverlight.CollectionBase`2.xd6b6ed77479ef68c(T xccb63ca5f63dc470, Boolean x808547253555a9ba)
   at MindFusion.Diagramming.Silverlight.CollectionBase`2.Add(T item)

Please advice.
  
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Stoyo
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Re: Custom class inherited from DiagramLink
Reply #1 - Nov 17th, 2011 at 11:34am
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Hi,

It seems you must set the link's Origin and Destination before adding it. If you don't know the origin and destination yet, use the DummyNode class:

Code
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var link = new LinkElement();
link.Origin = new DummyNode(diagram);
link.Destination = new DummyNode(diagram);
diagram.Items.Add(link);


I hope that helps,
Stoyan
  
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binuvc
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Re: Custom class inherited from DiagramLink
Reply #2 - Nov 17th, 2011 at 12:05pm
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Its working now!!

Thanks Smiley
  
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