LoginViewDesigner.GetEmptyDesignTimeHtml Method ()
Gets the markup that renders a placeholder for the associated control at design time when the current template is not defined.
Assembly: System.Design (in System.Design.dll)
Return Value
Type: System.StringA string containing markup text that renders to a placeholder on the design surface.
The GetEmptyDesignTimeHtml method first formats a string message that specifies the name of the current template of the associated LoginView control and also specifies that the template is empty. Then the GetEmptyDesignTimeHtml generates the markup for a placeholder containing that message.
The following code example shows how to override the GetEmptyDesignTimeHtml method in a class that is inherited from the LoginViewDesigner class to change the appearance of a control that is derived from the LoginView class at design time. The example generates the markup for a placeholder that includes the names of all the RoleGroup objects that are defined for the associated control.
// Generate the design-time markup for the control // when the template is empty. protected override string GetEmptyDesignTimeHtml() { // Generate a design-time placeholder containing the names of all // the role groups. MyLoginView myLoginViewCtl = (MyLoginView)ViewControl; RoleGroupCollection roleGroups = myLoginViewCtl.RoleGroups; string roleNames = null; // If there are any role groups, form a string of their names. if (roleGroups.Count > 0) { roleNames = "Role Groups: <br /> " + roleGroups[0].ToString(); for( int rgX = 1; rgX < roleGroups.Count; rgX++ ) roleNames += "<br /> " + roleGroups[rgX].ToString(); } return CreatePlaceHolderDesignTimeHtml( roleNames); } // GetEmptyDesignTimeHtml
Available since 2.0