HtmlTextWriter.TagName 屬性

定義

命名空間:

System.Web.UI

組件:

System.Web.dll

取得或設定所呈現的標記項目的標記名稱。

protected:
 property System::String ^ TagName { System::String ^ get(); void set(System::String ^ value); };

protected string TagName { get; set; }

member this.TagName : string with get, set

Protected Property TagName As String

屬性值

String

所呈現的標記項目的標記名稱。

範例

下列程式碼範例示範衍生自 HtmlTextWriter 類別中方法的 RenderBeforeTag 覆寫版本。 程式碼範例會藉由呼叫 String.Compare 方法來檢查要呈現的專案是否為 <label> 專案，然後傳遞 TagName 屬性值和字串 "label" 作為參數引數。 <label>如果專案即將轉譯，則會在元素的開頭標記之前 <label> 轉譯元素的開頭標記 <font> ，並將 color 屬性設定 red 為 。 如果要轉譯的專案不是 <label> 專案，則會呼叫基類的 RenderBeforeTag 方法版本。

// Override the RenderBeforeTag method to add the
// opening tag of a Font element before the
// opening tag of any Label elements rendered by this
// custom markup writer.
virtual String^ RenderBeforeTag() override
{
   // Compare the TagName property value to the
   // String* label to determine whether the element to
   // be rendered is a Label. If it is a Label,
   // the opening tag of the Font element, with a Color
   // style attribute set to red, is added before
   // the Label.
   if ( String::Compare( TagName, "label" ) == 0 )
   {
      return "<font color=\"red\">";
   }
   // If a Label is not being rendered, use
   // the base RenderBeforeTag method.
   else
   {
      return __super::RenderBeforeTag();
   }
}

// Override the RenderBeforeTag method to add the 
// opening tag of a Font element before the 
// opening tag of any Label elements rendered by this 
// custom markup writer. 
protected override string RenderBeforeTag()
{
    // Compare the TagName property value to the
    // string label to determine whether the element to 
    // be rendered is a Label. If it is a Label,
    // the opening tag of the Font element, with a Color
    // style attribute set to red, is added before
    // the Label.
    if (String.Compare(TagName, "label") == 0)
    {
        return "<font color=\"red\">";
    }
    // If a Label is not being rendered, use 
        // the base RenderBeforeTag method.
    else
    {
        return base.RenderBeforeTag();
    }
}

' Override the RenderBeforeTag method to add the 
' opening tag of a Font element before the 
' opening tag of any Label elements rendered by this 
' custom markup writer. 
Protected Overrides Function RenderBeforeTag() As String
    ' Compare the TagName property value to the
    ' string label to determine whether the element to 
    ' be rendered is a Label. If it is a Label,
    ' the opening tag of the Font element, with a Color
    ' style attribute set to red, is added before
    ' the Label.
    If String.Compare(TagName, "label") = 0 Then
        Return "<font color=""red"">"
        ' If a Label is not being rendered, use 
        ' the base RenderBeforeTag method.
    Else
        Return MyBase.RenderBeforeTag()
    End If
End Function 'RenderBeforeTag

備註

屬性 TagName 只用于繼承自 類別的 HtmlTextWriter 類別。 您應該只在方法呼叫中 RenderBeginTag 讀取或設定 TagName 屬性;這是它設定為一致值的唯一時間。

另請參閱

• TextWriter
• HtmlTextWriterTag
• RenderBeginTag
• TagKey