FormViewDesigner.GetDesignTimeHtml Method ()
Assembly: System.Design (in system.design.dll)
If an item template has been defined for the FormView control, the GetDesignTimeHtml method sets the DataKeyNames collection of the control to an empty String array if the schema for the data source cannot be obtained. The GetDesignTimeHtml refreshes the TypeDescriptor object to force a call to the PreFilterProperties method. The GetDesignTimeHtml then calls the base method to generate the markup.
If no item template has been defined for the FormView control, the GetDesignTimeHtml calls the GetEmptyDesignTimeHtml method to generate markup that renders to a placeholder.
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 FormView control or a copy of the FormView control to generate the markup.The following code example shows how to override the GetDesignTimeHtml method in a class that is inherited from the FormViewDesigner class to change the appearance of the FormView 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 FormView is the NotSet or None value, the GetDesignTimeHtml draws a blue dashed border around the control to make its extent more visible. The example does not change the run-time appearance of the control.
Reference
FormViewDesigner ClassFormViewDesigner Members
System.Web.UI.Design.WebControls Namespace
Refresh
CurrentMode
ItemTemplate
GetEmptyDesignTimeHtml
FormView
BaseDataBoundControlDesigner.GetDesignTimeHtml
ControlDesigner.GetDesignTimeHtml