通过

HtmlMeta.Scheme 属性

  • 参考

定义

命名空间:
System.Web.UI.HtmlControls
程序集:
System.Web.dll

获取或设置 scheme 特性，该特性用于解释由 HtmlMeta 控件定义的元数据属性值。

public:
 virtual property System::String ^ Scheme { System::String ^ get(); void set(System::String ^ value); };
public virtual string Scheme { get; set; }
member this.Scheme : string with get, set
Public Overridable Property Scheme As String

属性值

String

scheme 特性。

示例

下面的代码示例演示如何使用 HtmlMeta 控件定义网页的 HTML <meta> 元素。 定义了两 <meta> 个标记，一个列表关键字描述页面，一个列出页面创建日期。 该 Scheme 属性用于与日期相关的 <meta> 标记，以帮助用户代理读取日期值。

<%@ Page Language="C#" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">

  protected void Page_Load(object sender, EventArgs e)
  {
    // Create two instances of an HtmlMeta control.
    HtmlMeta hm1 = new HtmlMeta();
    HtmlMeta hm2 = new HtmlMeta();    

    // Get a reference to the page header element.
    HtmlHead head = (HtmlHead)Page.Header;
    
    // Define an HTML <meta> element that is useful for search engines.
    hm1.Name = "keywords";
    hm1.Content = "words that describe your web page";
    head.Controls.Add(hm1);
    
    // Define an HTML <meta> element with a Scheme attribute.
    hm2.Name = "date";
    hm2.Content = DateTime.Now.ToString("yyyy-MM-dd");
    hm2.Scheme = "YYYY-MM-DD";
    head.Controls.Add(hm2);
    
  }
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>HtmlMeta Example</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    View the HTML source code of the page to see the two HTML meta elements added.
    </div>
    </form>
</body>
</html>

<%@ Page Language="VB" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">

  Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)
    
    ' Create two instances of an HtmlMeta control.
    Dim hm1 As New HtmlMeta()
    Dim hm2 As New HtmlMeta()
    
    ' Get a reference to the page header element.
    Dim head As HtmlHead = Page.Header

    ' Define an HTML <meta> element that is useful for search engines.
    hm1.Name = "keywords"
    hm1.Content = "words that describe your web page"
    head.Controls.Add(hm1)

    ' Define an HTML <meta> element with a Scheme attribute.
    hm2.Name = "date"
    hm2.Content = DateTime.Now.ToString("yyyy-MM-dd")
    hm2.Scheme = "YYYY-MM-DD"
    head.Controls.Add(hm2)

  End Sub
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>HtmlMeta Example</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    View the HTML source code of the page to see the two HTML meta elements added.
    </div>
    </form>
</body>
</html>

注解

该 Scheme 属性允许指定 scheme 呈现的 HTML <meta> 元素的属性。 该 scheme 属性可用于提供用户代理，例如客户端浏览器或搜索引擎，用于解释元数据属性的其他上下文。

该 Scheme 属性呈现为 scheme 生成的 HTML <meta> 元素的属性。

适用于

另请参阅