MenuDesigner.GetEmptyDesignTimeHtml Method

Definition

Namespace:

System.Web.UI.Design.WebControls

Assembly:

System.Design.dll

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

protected:
 override System::String ^ GetEmptyDesignTimeHtml();

protected override string GetEmptyDesignTimeHtml ();

override this.GetEmptyDesignTimeHtml : unit -> string

Protected Overrides Function GetEmptyDesignTimeHtml () As String

Returns

String

A string containing markup text that renders to a placeholder on the design surface.

Examples

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

' Generate the design-time markup for the control 
' when the template is empty.
Protected Overrides Function GetEmptyDesignTimeHtml() As String

    Dim noElements As String = "Contains no menu items."

    Return CreatePlaceHolderDesignTimeHtml(noElements)

End Function ' GetEmptyDesignTimeHtml

Remarks

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.

See also

• GetDesignTimeHtml()
• GetErrorDesignTimeHtml(Exception)
• Menu
• Walkthrough: Creating a Basic Control Designer for a Web Server Control