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Vote

dynamicaly generating diagram through button click doesn't work

I have a function named "updateData", which fills my Connector- and NodeCollections. I have 10 Connectionobjects and 11 Nodes.

I am getting a correct diagram, when i am calling the function from OnInitialized().

When i call the function through a button click, i am getting just some (11 + 10) not connected boxed.


protected override void OnInitialized()
    {
        //updateData();
    }
    private void updateData()
    {
        var tree = chartservice.GetDashboard();
        var rowList = tree.Rows;
        foreach (DataRow node in rowList)
        {
            var diagramNode = new DiagramNode { Id = node["Id"].ToString(), Annotations = new ObservableCollection() { new DiagramNodeAnnotation() { Content = node["Titel"].ToString() } } };
            NodeCollection.Add(diagramNode);
            int nodeId = int.Parse(node["Id"].ToString());
            if (nodeId > 0)
            {
                var connector = new DiagramConnector() { Id = "connector" + node["Id"].ToString(), SourceID = node["ParentId"].ToString(), TargetID = node["Id"].ToString() };
                ConnectorCollection.Add(connector);
            }
        }
    }

Console Errorstack:
System.InvalidCastException: Unable to cast object of type 'Syncfusion.EJ2.Blazor.Diagrams.DiagramNode' to type 'Syncfusion.EJ2.Blazor.BaseComponent'.
   at Syncfusion.EJ2.Blazor.BaseComponent.UpdateCollectionValue(Object propertyValue, Type propertyType, Nullable`1 ejsIndex, Object model, Boolean isAutoInitialized)
   at Syncfusion.EJ2.Blazor.BaseComponent.UpdateComponentModel(Dictionary`2 properties, BaseComponent parentObject, Boolean isAutoInitialized)
   at Syncfusion.EJ2.Blazor.BaseComponent.UpdateModel(Dictionary`2 properties)
Error: System.InvalidCastException: Unable to cast object of type 'Syncfusion.EJ2.Blazor.Diagrams.DiagramNode' to type 'Syncfusion.EJ2.Blazor.BaseComponent'.
   at Syncfusion.EJ2.Blazor.BaseComponent.UpdateCollectionValue(Object propertyValue, Type propertyType, Nullable`1 ejsIndex, Object model, Boolean isAutoInitialized)
   at Syncfusion.EJ2.Blazor.BaseComponent.UpdateComponentModel(Dictionary`2 properties, BaseComponent parentObject, Boolean isAutoInitialized)
   at Syncfusion.EJ2.Blazor.BaseComponent.UpdateModel(Dictionary`2 properties)
    at Object.endInvokeDotNetFromJS (https://localhost:44380/_framework/blazor.server.js:8:31660)
    at e. (https://localhost:44380/_framework/blazor.server.js:8:103446)
    at https://localhost:44380/_framework/blazor.server.js:1:19202 
    at Array.forEach ()
    at e.invokeClientMethod (https://localhost:44380/_framework/blazor.server.js:1:19173)
    at e.processIncomingData (https://localhost:44380/_framework/blazor.server.js:1:17165)
    at e.connection.onreceive (https://localhost:44380/_framework/blazor.server.js:1:10276)
    at WebSocket.i.onmessage (https://localhost:44380/_framework/blazor.server.js:1:38091)