HtmlTextWriter.TagName 属性

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

属性值

正在呈现的标记元素的标记名称。

示例

下面的代码示例演示从RenderBeforeTag类派生的类中重写的方法版本HtmlTextWriter。 代码示例通过调用<label>方法检查要呈现的元素是否为String.Compare元素，TagName然后将属性值和字符串作为参数参数传递"label"。 <label>如果元素即将呈现，则元素的<font>开始标记在元素的开始标记之前color呈现，其red属性设置为 <label>。 如果要呈现的元素不是 <label> 元素，将调用基类的方法版本 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.
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

注解

该 TagName 属性仅用于从类继承的 HtmlTextWriter 类。 应仅在方法调用中TagName读取或设置RenderBeginTag属性;这是唯一设置为一致值的时间。

另请参阅

• TextWriter
• HtmlTextWriterTag
• RenderBeginTag
• TagKey