This documentation is archived and is not being maintained.

GridViewDesigner::GetDesignTimeHtml Method

Gets the markup that is used to render the associated control at design time.

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

public:
virtual String^ GetDesignTimeHtml() override

Return Value

Type: System::String
A String containing the markup used to render the GridView at design time.

The GetDesignTimeHtml() method does the following:

  1. Sets the AutoGenerateColumns property of the control to true, if the Columns property is empty.

  2. Sets the DataKeyNames property of the control to nullptr, if the schema of the data source cannot be obtained.

  3. Refreshes the TypeDescriptor object to force the PreFilterProperties method to be called.

  4. Calls the base method to generate the markup.

Notes to Inheritors

If you override the GetDesignTimeHtml method, be sure to call the base method, because it eventually, through several override levels, calls on the GridView control or a copy of the control to generate the markup.

The following code example shows how to override the GetDesignTimeHtml method in a class that is inherited from the GridViewDesigner class to change the appearance of the GridView control at design time. The example adds a new first row to the grid to contain the Caption property, if the Caption is defined. If the BorderStyle property of the control that is derived from the GridView class has the NotSet or None value, the GetDesignTimeHtml draws a blue dashed border around the control to make its extent more visible. It does not change the run-time appearance of the control.

No code example is currently available or this language may not be supported.

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
Show: