Feature Change Request: Diagram node children

[Scott Peal]

Bug maybe? If we instantiate the diagram node children but don't add any children, then the node doesn't appear and throws a Chrome bug. Would it be better to change the children to a List<string>? Then we could just do a server.childern.add(childId) and foreach.

Example:

     var myParentNode = new DiagramNode {...}

     myParentNode.Children = new string[Apps.Count];

Uncaught (in promise) TypeError: Cannot read property 'id' of undefined

    at r.insertBlazorDiagramObjects (diagrams-d6d441.min.js:1)

    at r.insertBlazorDiagramObjects (diagrams-d6d441.min.js:1)

    at r.drag (diagrams-d6d441.min.js:1)

    at r.updateGroupOffset (diagrams-d6d441.min.js:1)

    at r.initObject (diagrams-d6d441.min.js:1)

    at r.initNodes (diagrams-d6d441.min.js:1)

    at r.initLayerObjects (diagrams-d6d441.min.js:1)

    at r.initObjects (diagrams-d6d441.min.js:1)

    at r.render (diagrams-d6d441.min.js:1)

    at r.appendTo (syncfusion-blazor.min.js:1)

[Aravind Ravi]

Hi Scott, 

By default, In the group node we only able to set node id’s as children to the group node. We suspect that issue occurs due to you set any number value or any node which is not added in diagram as children to the group node. So that the reported issue occurs. So please add only string as children to the group node. In case if the issue still persists, please share us more details about issue which would help us to proceed further. 

Regards 

Aravind Ravi 

[Scott Peal]

My issue was I added the wrong ID's to the parent. When I corrected, the issue was fixed. I would prefer List<Diagram> for children so we could use foreach loops from a database call to add node and would eliminate an issue like misspelling the Id.

[Aravind Ravi]

Hi Scott, 

We does not have any immediate plans to change the string array to List<children>. However, by using diagram GetNode we can find whether the node is added in the diagram or not. If the node is present in the diagram node collection means then get node method returns that node else it returns null. So before add children to the node check it by using GetNode method. Please find the below code snippet for how to use the GetNode method. 

List<string> childnodes = new List<string>(); 

        foreach(string childNode in child) 

        { 

            var node = diagram.GetNode(childNode); 

            if(node != null) 

            { 

                childnodes.Add(childNode); 

            } 

        } 

       string[] children = childnodes.ToArray(); 

Regards 

Aravind Ravi