ModelEditorGroupingHelper.RegisterNodeGroupPathDelegate(Type, Func<IModelNode, String[]>) Method

Registers the method used to calculate the Application Model node’s group path in the Model Editor‘s Nodes Tree.

Namespace: DevExpress.ExpressApp.ModelEditor

Assembly: DevExpress.ExpressApp.v18.2.dll

Declaration

C#

public void RegisterNodeGroupPathDelegate(
    Type collectionNodeType,
    Func<IModelNode, string[]> GetNodeGroupPathDelegate
)

VB.NET

Public Sub RegisterNodeGroupPathDelegate(
    collectionNodeType As Type,
    GetNodeGroupPathDelegate As Func(Of IModelNode, String())
)

Parameters

Name	Type	Description
collectionNodeType	Type	A Type object specifying the type of the Application Model node.
GetNodeGroupPathDelegate	Func<IModelNode, String[]>	A delegate used to calculate the Application Model node’s group path.

Remarks

You can call the RegisterNodeGroupPathDelegate method in the platform-agnostic module’s constructor.

C#

using DevExpress.ExpressApp.ModelEditor;
// ...
public sealed partial class MySolutionModule : ModuleBase {
    public MySolutionModule () {
        InitializeComponent();
        ModelEditorGroupingHelper.Instance.AllowSplitByGroupLevels = true;
        ModelEditorGroupingHelper.Instance.RegisterNodeGroupPathDelegate(
            typeof(IModelViews), node => CusomGroupPathCalculator(node));
    }
    public string[] CusomGroupPathCalculator(IModelNode node) {
        // ...
    }
    // ...
}

VB.NET

Imports DevExpress.ExpressApp.ModelEditor
' ...
Public NotInheritable Partial Class MySolutionModule
    Inherits ModuleBase

    Public Sub New()
        InitializeComponent()
        ModelEditorGroupingHelper.Instance.AllowSplitByGroupLevels = True
        ModelEditorGroupingHelper.Instance.RegisterNodeGroupPathDelegate(GetType(IModelViews), Function(node) CusomGroupPathCalculator(node))
    End Sub
    Public Function CusomGroupPathCalculator(ByVal node As IModelNode) As String()
        ' ...
    End Function
    ' ...
End Class

You can use the ModelEditorGroupingHelper.SplitGroupPath helper method in your custom delegate to calculate the group path.

The ModelEditorGroupingHelper provides two built-in delegates that can be passed to the RegisterNodeGroupPathDelegate method:

• ModelEditorGroupingHelper.DefaultGroupPathCalculator
• ModelEditorGroupingHelper.ActionsNodeGroupPathCalculator