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MenuDesigner.GetEmptyDesignTimeHtml Method

Gets the markup that renders a placeholder for the associated control at design time when no markup is otherwise available.

Namespace:  System.Web.UI.Design.WebControls
Assembly:  System.Design (in System.Design.dll)

protected override string GetEmptyDesignTimeHtml()

Return Value

Type: System.String
A string containing markup text that renders to a placeholder on the design surface.

The GetEmptyDesignTimeHtml method generates the markup for a placeholder that specifies the Menu control name and a message instructing you to use the collection editor to add items.

The following code example shows how to override the GetEmptyDesignTimeHtml method in a class that is inherited from the MenuDesigner class. The overridden method changes the appearance of a control that is derived from the Menu class at design time. The example generates the markup for a placeholder that includes a message indicating that no menu items are defined for the associated control.

// Generate the design-time markup for the control  
// when the template is empty. 
protected override string GetEmptyDesignTimeHtml()
    string noElements = "Contains no menu items.";

    return CreatePlaceHolderDesignTimeHtml(noElements);
} // GetEmptyDesignTimeHtml

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0