How to perform Drag and drop operation in OrgChart in ASP.NET Web Forms Diagram?

How to perform Drag and Drop operation in OrgChart

In the Orgchart sample, we can drag and drop the node onto another node using the drop event which establish the parent/child relationship. Also we need to enable the AllowDrop constraints which shows the highlighter, when we drag the node and mouse hover on the another node. Please refer to the code example below.

ASPX

<ej:Diagram ID="BusinessChart" runat="server" Height="100%" Width="100%" EnableContextMenu="false">
                    <Layout Type="OrganizationalChart" MarginY="30" HorizontalSpacing="40" VerticalSpacing="40" />
                        <SnapSettings SnapConstraints="None" />
             </ej:Diagram>

ASPX.CS

//Enable the Allowdrop constraints which shows the highlighter, when we drag the node and mouse hover on the another node.      BusinessChart.Model.DefaultSettings.Node = new Node() {Constraints=NodeConstraints.Default |NodeConstraints.AllowDrop };
//define drop event
BusinessChart.OnClientDrop = "drop";

ASPX

function drop(args) {
   var diagram = $("#BusinessChart").ejDiagram("instance");
   if (!args.source.cssClass) {
     if (diagram.getObjectType(args.target) == "node") {
        if (args.element) {
           var connector = diagram.findNode(args.element.inEdges[0]);
         }
         if (connector) {
            diagram.updateConnector(connector.name, { sourceNode: args.target.name, targetNode: args.element.name });
          }
          else {
              diagram.add({ name: "connector" + ej.datavisualization.Diagram.Util.randomId(), segments: [{ type: "orthogonal" }], sourceNode: args.target.name, targetNode: args.element.name });
               }
        }
     }
     //update the layout
     diagram.layout();
  }

Note:

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