.NET Framework 4.5.2+
.NET Framework 4.5.2+
.NET Standard 2.0+
.NET Core 3.0+

ViewController.TargetViewType Property

Specifies the type of the View, for which a View Controller is intended.

Namespace: DevExpress.ExpressApp

Assembly: DevExpress.ExpressApp.v19.2.dll

Declaration

[DefaultValue(ViewType.Any)]
public ViewType TargetViewType { get; set; }
<DefaultValue(ViewType.Any)>
Public Property TargetViewType As ViewType
[DefaultValue(ViewType.Any)]
public ViewType TargetViewType { get; set; }
<DefaultValue(ViewType.Any)>
Public Property TargetViewType As ViewType
[DefaultValue(ViewType.Any)]
public ViewType TargetViewType { get; set; }
<DefaultValue(ViewType.Any)>
Public Property TargetViewType As ViewType

Property Value

Type Default Description
ViewType

Any

A ViewType enumeration value identifying a View type.

Property Value

Type Default Description
ViewType

Any

A ViewType enumeration value identifying a View type.

Property Value

Type Default Description
ViewType

Any

A ViewType enumeration value identifying a View type.

Remarks

View Controllers can be activated for both List and Detail Views. You can use the TargetViewType property to provide View Controller activation within the List, Detail, or any type of View.

Note

The TargetViewType property affects only ViewController's activation. Controller.FrameAssigned and other events that are irrelevant to the view type always fire.

Alternatively, you can implement the generic ViewController<ViewType> Controller instead of the ViewController and specify the View's type, for which this Controller is intended, in the ViewType generic parameter. In this case, you do not need to perform an additional cast when you access the View.

The example below demonstrates how to add a PopupWindowShowAction to all List Views in an application.

using System;
using DevExpress.ExpressApp;
using DevExpress.ExpressApp.Actions;
using DevExpress.Persistent.Base;
using DevExpress.Persistent.BaseImpl;
// ...
public class ShowListViewController : ViewController {
    public ShowListViewController() {
        TargetViewType = ViewType.ListView;
        PopupWindowShowAction showListViewAction = new PopupWindowShowAction(this, "ShowListView",
            PredefinedCategory.Edit);
        showListViewAction.CustomizePopupWindowParams += ShowListViewAction_CustomizePopupWindowParams;
    }
    private void ShowListViewAction_CustomizePopupWindowParams(object sender, CustomizePopupWindowParamsEventArgs e) {
        Type objectType = typeof(Person);
        e.View = Application.CreateListView(objectType, true);
    }
}
See Also