DataGridDesigner.GetDesignTimeHtml 方法

public:
 override System::String ^ GetDesignTimeHtml();

public override string GetDesignTimeHtml();

override this.GetDesignTimeHtml : unit -> string

Public Overrides Function GetDesignTimeHtml () As String

傳回

設計時用來表示 DataGrid 控制項的 HTML 標記。

範例

以下程式碼範例說明如何覆寫該 GetDesignTimeHtml 方法，以改變控制項在設計表面上的外觀 DataGrid 。

程式碼使用 Try...Catch...Finally 語法來達成以下功能：

• 該 Try 區段會改變資料網格控制項屬性的值。

• 該Catch區段會捕捉任何例外並傳送到方法。GetErrorDesignTimeHtml

• 該區段 Finally 將屬性設定為原始值。

此範例是本類別更大 DataGridDesigner 範例的一部分。

' Override the GetDesignTimeHtml method to add style to the control
' on the design surface.
Public Overrides Function GetDesignTimeHtml() As String
    ' Cast the control to the Component property of the designer.
    simpleList = CType(Component, SimpleDataList)

    Dim designTimeHtml As String = Nothing

    ' Create variables to hold current property values.
    Dim oldBorderWidth As Unit = simpleList.BorderWidth
    Dim oldBorderColor As Color = simpleList.BorderColor

    ' Set the properties and generate the design-time HTML.
    If (simpleList.Enabled) Then
        Try
            simpleList.BorderWidth = Unit.Point(5)
            simpleList.BorderColor = Color.Purple
            designTimeHtml = MyBase.GetDesignTimeHtml()

            ' Call the GetErrorDesignTimeHtml method if an
            ' exception occurs.
        Catch ex As Exception
            designTimeHtml = GetErrorDesignTimeHtml(ex)

            ' Return the properties to their original settings.
        Finally
            simpleList.BorderWidth = oldBorderWidth
            simpleList.BorderColor = oldBorderColor
        End Try
        ' If the list is not enabled, call the GetEmptyDesignTimeHtml
        ' method.
    Else
        designTimeHtml = GetEmptyDesignTimeHtml()
    End If

    Return designTimeHtml

End Function

另請參閱

• GridView 網頁伺服器控制概述
• 提供 Design-Time 支持
• 如何：擴展設計模式下控制項的外觀與行為