expressappframework-devexpress-dot-expressapp-dot-win-dot-systemmodule-dot-imodeloptionswin-d7d9a8b0.md
Specifies the Show View Strategy (see ShowViewStrategyBase) used in the WinForms application.
Namespace : DevExpress.ExpressApp.Win.SystemModule
Assembly : DevExpress.ExpressApp.Win.v25.2.dll
NuGet Packages : DevExpress.ExpressApp.Win, DevExpress.ExpressApp.Win.Design
[DefaultValue(UIType.MultipleWindowSDI)]
UIType UIType { get; set; }
<DefaultValue(UIType.MultipleWindowSDI)>
Property UIType As UIType
| Type | Default | Description |
|---|---|---|
| UIType | MultipleWindowSDI |
A UIType enumeration value specifying the type of the UI used in the WinForms application.
|
Available values:
| Name | Description |
|---|---|
| MultipleWindowSDI |
The UI displays a single document interface. The application uses ShowInMultipleWindowsStrategy.
Applies to : Windows Forms
| | SingleWindowSDI |
The UI displays a single document interface. The application uses ShowInSingleWindowStrategy for Windows Forms and DevExpress.ExpressApp.Blazor.BlazorShowViewStrategy for ASP.NET Core Blazor.
Applies to : ASP.NET Core Blazor and Windows Forms
| | StandardMDI |
The UI displays a multiple document interface. The application uses MdiShowViewStrategy in standard mode.
Applies to : Windows Forms
| | TabbedMDI |
The UI displays a multiple document interface. The application uses MdiShowViewStrategy in tabbed mode for Windows Forms and DevExpress.ExpressApp.Blazor.BlazorMdiShowViewStrategy for ASP.NET Core Blazor.
Applies to : ASP.NET Core Blazor and Windows Forms
|
We do not recommend setting this property to StandardMDI when the Ribbon interface is used. This configuration has not been thoroughly tested, as we have found it much less usable than others, and can potentially lead to errors. In conjunction with the Ribbon, the TabbedMDI mode provides better usability.
The following images demonstrate how the WinForms application UI is modified depending on this property’s value.
MultipleWindowSDI SingleWindowSDI StandardMDI TabbedMDI
The following code snippet (auto-collected from DevExpress Examples) contains a reference to the UIType property.
Note
The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.
void application_ModelChanged(object sender, EventArgs e) {
UIType uiType = ((IModelOptionsWin)Application.Model.Options).UIType;
if (uiType == UIType.StandardMDI) {
See Also
How to: Change View Display Mode from Tabbed MDI to Single Window (SDI)