Skip to main content

ASPxDiagram.EdgeInserted Event

Occurs after an edge was inserted.

Namespace: DevExpress.Web.ASPxDiagram

Assembly: DevExpress.Web.ASPxDiagram.v22.1.dll

Declaration

public event DiagramItemInsertedEventHandler EdgeInserted

Event Data

The EdgeInserted event's data class is DiagramItemInsertedEventArgs. The following properties provide information specific to this event:

Property Description
AffectedRecords Gets the number of records affected by the update operation. Inherited from ASPxDataBaseUpdatedEventArgs.
Exception Gets the exception (if any) that was raised during the update operation. Inherited from ASPxDataBaseUpdatedEventArgs.
ExceptionHandled Gets or sets whether an exception raised during the update operation was handled in the event handler. Inherited from ASPxDataBaseUpdatedEventArgs.
KeyValue Specifies the key value of the inserted item.
NewValues Gets a dictionary that contains the values of the non-key field name/value pairs in the row to be inserted. Inherited from ASPxDataInsertedEventArgs.

Remarks

<dx:ASPxDiagram ID="Diagram" runat="server" Width="100%" Height="600px" Units="In"
    NodeDataSourceID="FlowNodeDataSource" EdgeDataSourceID="FlowEdgeDataSource" 
    OnNodeInserted="Diagram_ItemInserted" OnEdgeInserted="Diagram_ItemInserted" >
    <SettingsAutoLayout Type="Layered" Orientation="Vertical" />
    <Mappings>
        <Node Key="ID" Type="Type" Width="Width" Height="Height" />
        <Edge Key="ID" FromKey="FromID" ToKey="ToID" Text="Text" />
    </Mappings>
</dx:ASPxDiagram>
<ef:EntityDataSource runat="server" ID="FlowNodeDataSource" ContextTypeName="DevExpress.Web.Demos.FlowContextSL" 
  EntitySetName="Nodes" EnableDelete="True" EnableInsert="True" EnableUpdate="True" OnInserted="FlowItemDataSource_Inserted">
</ef:EntityDataSource>
<ef:EntityDataSource runat="server" ID="FlowEdgeDataSource" ContextTypeName="DevExpress.Web.Demos.FlowContextSL" 
  EntitySetName="Edges" EnableDelete="True" EnableInsert="True" EnableUpdate="True" OnInserted="FlowItemDataSource_Inserted">
</ef:EntityDataSource>

Important

When you bind the ASPxDiagram control to a data source, ensure that the KeyValue property is specified.

protected void FlowItemDataSource_Inserted(object sender, Microsoft.AspNet.EntityDataSource.EntityDataSourceChangedEventArgs e) {
    if (e.Entity is FlowEntity)
        lastInsertedId = ((FlowEntity)e.Entity).ID;
}

protected void Diagram_ItemInserted(object sender, DevExpress.Web.ASPxDiagram.DiagramItemInsertedEventArgs e) {
    e.KeyValue = lastInsertedId;
}

Run Demo: Node and Edge Data Sources

See Also