DataGridDesigner.GetErrorDesignTimeHtml Method
.NET Framework 3.0
Gets the HTML markup displayed at design time for the specified exception when an error has been encountered while rendering the control.
Namespace: System.Web.UI.Design.WebControls
Assembly: System.Design (in system.design.dll)
Assembly: System.Design (in system.design.dll)
The following code example shows how to override the GetErrorDesignTimeHtml method to modify the appearance of the DataGrid control on the design surface when an exception occurs.
This code example is part of a larger example provided for the DataGridDesigner class.
Protected Overrides Function GetEmptyDesignTimeHtml() As String Dim emptyText As String ' Check the CanEnterTemplateMode property to ' specify which text to display if ItemTemplate ' does not contain a value. If CanEnterTemplateMode Then emptyText = _ "<b>Either the Enabled property value is false " + _ "or you need to set the ItemTemplate for this " + _ "control.<br>Right-click to edit templates.</b>" Else emptyText = _ "<b>You cannot edit templates in this view.<br>" + _ "Switch to HTML view to define the ItemTemplate.</b>" End If Return CreatePlaceHolderDesignTimeHtml(emptyText) End Function
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