HtmlTextWriter.RenderAfterTag 方法

protected:
 virtual System::String ^ RenderAfterTag();

protected virtual string RenderAfterTag();

abstract member RenderAfterTag : unit -> string
override this.RenderAfterTag : unit -> string

Protected Overridable Function RenderAfterTag () As String

返回

在元素的结束标记之后要写入的间距或文本。

示例

下面的代码示例演示如何重写 RenderAfterTag 方法，以确定派生自 HtmlTextWriter 该类的类是否正在呈现 <label> 元素。 如果是这样，重写将RenderAfterTag紧接在元素之后<font>插入元素的<label>结束标记。 如果不是 <label> 元素， RenderAfterTag 则使用基方法。

// Override the RenderAfterTag method to add the
// closing tag of the Font element after the
// closing tag of a Label element has been rendered.
virtual String^ RenderAfterTag() 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 closing tag of a Font element is rendered
   // after the closing tag of the Label element.
   if ( String::Compare( TagName, "label" ) == 0 )
   {
      return "</font>";
   }
   // If a Label is not being rendered, use
   // the base RenderAfterTag method.
   else
   {
      return __super::RenderAfterTag();
   }
}

// Override the RenderAfterTag method to add the 
// closing tag of the Font element after the 
// closing tag of a Label element has been rendered.
protected override string RenderAfterTag()
{
    // 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 closing tag of a Font element is rendered
    // after the closing tag of the Label element.
    if (String.Compare(TagName, "label") == 0)
    {
        return "</font>";
    }
    // If a Label is not being rendered, use 
        // the base RenderAfterTag method.
    else
    {
        return base.RenderAfterTag();
    }
}

    ' Override the RenderAfterTag method to add the 
    ' closing tag of the Font element after the 
    ' closing tag of a Label element has been rendered.
    Protected Overrides Function RenderAfterTag() 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 closing tag of a Font element is rendered
        ' after the closing tag of the Label element.
        If String.Compare(TagName, "label") = 0 Then
            Return "</font>"
            ' If a Label is not being rendered, use 
            ' the base RenderAfterTag method.
        Else
            Return MyBase.RenderAfterTag()
        End If
    End Function 'RenderAfterTag
End Class

注解

如果要在元素标记后呈现其他结束标记，此方法 RenderAfterTag 非常有用。

继承者说明

HtmlTextWriter方法的RenderAfterTag()类实现返回 null。 如果要在元素结束标记之后写入文本或间距，请重写 RenderAfterTag() 。

另请参阅

• TextWriter