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                                  • Hi,

                                    I have a question concerning the diagram control:

                                    Is there any way to force a new connection to actually be connected to 2 items? For example, we start to drag a connection from one item; is there a way to enforce that the user drop it onto a second item and ignore the connection creation if the user drops it outside an item?

                                    Thanks for your help,
                                    Stefan

                                1 Solution

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                                Hi Stefan,
                                To prohibit adding connectors without end items, handle the AddingNewItem event and set e.Cancel to true if the BeginItem and EndItem properties are null:

                                [C#]
                                private void DiagramDesignerControl_AddingNewItem(object sender, DevExpress.Xpf.Diagram.DiagramAddingNewItemEventArgs e) { DiagramConnector connector = e.Item as DiagramConnector; if (connector != null && (connector.BeginItem == null || connector.EndItem == null)) e.Cancel = true; }

                                Thanks,
                                Alexander