Control.IsLiteralContent 方法

定义

命名空间:

System.Web.UI

程序集:

System.Web.dll

确定服务器控件是否只包含文字内容。

protected:
 bool IsLiteralContent();

protected bool IsLiteralContent ();

member this.IsLiteralContent : unit -> bool

Protected Function IsLiteralContent () As Boolean

返回

Boolean

如果服务器控件只包含文本内容，则为 true；否则为 false。

示例

以下示例检查包含服务器控件的页面是否已回发。 如果控件包含，则调用 IsLiteralContent 该方法来确定控件是否只包含文本内容，还是其他服务器控件的父控件。 如果它只包含文本内容，则UniqueIDLiteralControl表示该内容的属性将写入响应。

// Override the OnLoad method to check if the 
// page that uses this control has posted back.
// If so, check whether this controls contains
// only literal content, and if it does,
// it gets the UniqueID property and writes it
// to the page. Otherwise, it writes a message
// that the control contains more than literal content.
protected override void OnLoad(EventArgs e)
{
        if (Page.IsPostBack)
        {
                String s;

                if (this.IsLiteralContent())
                {
                        s = Controls[0].UniqueID;
                        Context.Response.Write(s);
                }
                else
                {
                        Context.Response.Write(
                                "The control contains more than literal content.");
                }
        }
}

' Override the OnLoad method to check if the 
' page that uses this control has posted back.
' If so, check whether this controls contains
' only literal content, and if it does,
' it gets the UniqueID property and writes it
' to the page. Otherwise, it writes a message
' that the control contains more than literal content.
Overrides Protected Sub OnLoad(ByVal e As EventArgs)

   If Page.IsPostBack = True Then
      Dim s As String

      If Me.IsLiteralContent() = True Then
         s = Controls(0).UniqueID
         Context.Response.Write(s)
      Else
         Context.Response.Write( _
         "The control contains more than literal content.")
      End If
   End If
End Sub

注解

此方法返回 true时，服务器控件的集合包含单个文本控件。

另请参阅

• HasControls()
• LiteralControl