windowsforms-devexpress-dot-xtradiagram-dot-diagramdatabindingcontrollerbase-be8fa66c.md
Specifies the name of the data field that identifies the data item.
Namespace : DevExpress.XtraDiagram
Assembly : DevExpress.XtraDiagram.v25.2.dll
NuGet Package : DevExpress.Win.Diagram
[DiagramCategory(DiagramCategory.Data)]
public virtual string KeyMember { get; set; }
<DiagramCategory(DiagramCategory.Data)>
Public Overridable Property KeyMember As String
| Type | Description |
|---|---|
| String |
A System.String value.
|
Use the DiagramDataBindingControllerBase.KeySelector property to define a custom logic for choosing the data field that identifies the data item (e.g., when binding to data with multiple types of data objects).
The following code snippet (auto-collected from DevExpress Examples) contains a reference to the KeyMember property.
Note
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How-to-bind-diagram-items-Position/CS/DXSample/Form1.cs#L16
diagramDataBindingController1.DataSource = viewModel.Items;
diagramDataBindingController1.KeyMember = "Id";
diagramDataBindingController1.ConnectorsSource = viewModel.Connections;
How-to-bind-diagram-items-Position/VB/DXSample/Form1.vb#L16
diagramDataBindingController1.DataSource = viewModel.Items
diagramDataBindingController1.KeyMember = "Id"
diagramDataBindingController1.ConnectorsSource = viewModel.Connections
See Also
DiagramDataBindingControllerBase Class