How to prevent a container's size from updating when drawing a connector between child nodes of different containers in WPF Diagram (SfDiagram)?

In the WPF Diagram, you can restrict the Container size from updating while drawing a Connector from its child node to another container’s child Node by removing the connector from the container’s Connectors property using the connector’s events. Here’s a code example to demonstrate how to achieve this:

C# Code Snippet:

// Subscribe to the ConnectorSourceChangedEvent  
Diagram.Info as IGraphInfo).ConnectorSourceChangedEvent += ConnectorSourceChangedEvent;

private void ConnectorSourceChangedEvent(object sender, ChangeEventArgs<object, ConnectorChangedEventArgs> args)
       {
           if (((args.Item as ConnectorViewModel).SourceNode != null && (args.Item as ConnectorViewModel).SourceNode is NodeViewModel) && ((args.Item as ConnectorViewModel).TargetNode != null && (args.Item as ConnectorViewModel).TargetNode is NodeViewModel))
           {
               if (((args.Item as ConnectorViewModel).SourceNode as NodeViewModel).ParentGroup != ((args.Item as ConnectorViewModel).TargetNode as NodeViewModel).ParentGroup)
               {
                   if ((((args.Item as ConnectorViewModel).SourceNode as NodeViewModel).ParentGroup) != null)
                   {
                       ((((args.Item as ConnectorViewModel).SourceNode as NodeViewModel).ParentGroup as ContainerViewModel).Connectors as ConnectorCollection).Remove(args.Item as ConnectorViewModel);
                   }

                   if ((((args.Item as ConnectorViewModel).TargetNode as NodeViewModel).ParentGroup) != null)
                   {
                       ((((args.Item as ConnectorViewModel).TargetNode as NodeViewModel).ParentGroup as ContainerViewModel).Connectors as ConnectorCollection).Remove(args.Item as ConnectorViewModel);
                   }
               }
           }
       } 

Conclusion

I hope you enjoyed learning about how to prevent a container’s size from updating when drawing a connector between child nodes of different containers in the WPF Diagram.
You can refer to our WPF Diagram feature tour page to learn about its other groundbreaking feature representations and documentation, and how to quickly get started for configuration specifications.
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