IComplexViewItem Interface

Declares members implemented by View Items that have access to the XafApplication object and IObjectSpace of the current View.

Namespace: DevExpress.ExpressApp.Editors

Assembly: DevExpress.ExpressApp.v23.2.dll

NuGet Package: DevExpress.ExpressApp

Declaration

C#

public interface IComplexViewItem

VB.NET

Public Interface IComplexViewItem

Remarks

When implementing a custom Property Editor or a custom View Item you may want to:

• load arbitrary data from the application database;
• use methods provided by the application object, (e.g., XafApplication.CreateDetailView).

In these scenarios, a View Item or Property Editor requires access to the application object and to the Object Space of the current View. To get these objects, the Property Editor should support the IComplexViewItem interface. This interface exposes a single IComplexViewItem.Setup method that accepts objectSpace and application parameters. This method is called automatically for all IComplexViewItem View Items when a View is shown.

Here is an example of how to implement IComplexViewItem in a PropertyEditor descendant:

C#

using DevExpress.ExpressApp;
using DevExpress.ExpressApp.Editors;
// ...
public class CustomPropertyEditor : PropertyEditor, IComplexViewItem {
    private IObjectSpace objectSpace;
    private XafApplication application;

    #region IComplexViewItem Members
    void IComplexViewItem.Setup(IObjectSpace objectSpace, 
XafApplication application) {
        this.objectSpace = objectSpace;
        this.application = application;
    }
    #endregion

    // Example:
    protected override object CreateControlCore() {
        IList dataSource = objectSpace.GetObjects(Model.ModelMember.Type);
        // ...
    }
}

VB.NET

Imports DevExpress.ExpressApp
Imports DevExpress.ExpressApp.Editors
'...
Public Class CustomListEditor
    Inherits PropertyEditor
    Implements IComplexViewItem

    Private objectSpace As IObjectSpace
    Private application As XafApplication
    #Region "IComplexViewItem Members"
        Public Sub Setup(ByVal objectSpace As IObjectSpace, _
ByVal application As XafApplication) Implements IComplexViewItem.Setup
            Me.objectSpace = objectSpace
            Me.application = application
        End Sub
    #End Region
    ' Example:
    Protected Overrides Function CreateControlCore() As Object
        Dim dataSource As IList = objectSpace.GetObjects(Model.ModelMember.Type)
        ' ...
    End Function
End Class