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DataGridDesigner.GetErrorDesignTimeHtml(Exception) Method

  • Reference

Definition

Namespace:
System.Web.UI.Design.WebControls
Assembly:
System.Design.dll

Gets the HTML markup displayed at design time for the specified exception when an error has been encountered while rendering the control.

protected:
 override System::String ^ GetErrorDesignTimeHtml(Exception ^ e);
protected override string GetErrorDesignTimeHtml (Exception e);
override this.GetErrorDesignTimeHtml : Exception -> string
Protected Overrides Function GetErrorDesignTimeHtml (e As Exception) As String

Parameters

e
Exception

The exception that occurred.

Returns

String

The HTML markup displayed at design time for the specified exception.

Examples

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

Applies to

See also