IStyleSheet.CreateStyleRule(Style, IUrlResolutionService, String) 方法

  • 参考

定义

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

由类实现时，它为指定的文档语言元素类型或选择器创建样式规则。

public:
 void CreateStyleRule(System::Web::UI::WebControls::Style ^ style, System::Web::UI::IUrlResolutionService ^ urlResolver, System::String ^ selector);
public void CreateStyleRule (System.Web.UI.WebControls.Style style, System.Web.UI.IUrlResolutionService urlResolver, string selector);
abstract member CreateStyleRule : System.Web.UI.WebControls.Style * System.Web.UI.IUrlResolutionService * string -> unit
Public Sub CreateStyleRule (style As Style, urlResolver As IUrlResolutionService, selector As String)

参数

style
Style

要添加到嵌入式样式表中的样式规则。

urlResolver
IUrlResolutionService

一个实现了 IUrlResolutionService 的对象，它包含当前位置 (URL) 的上下文信息。

selector
String

HTML 页中受到样式影响的部分。

示例

下面的代码示例使用 Header 实现 IStyleSheet 来演示如何定义新 Style 对象 bodyStyle。 然后 bodyStyle ，通过调用 CreateStyleRule添加到当前 URL。

<%@ 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">

  void Page_Load(object sender, EventArgs e)
  {
    if (Page.Header != null)
    {
      // Create a Style object for the <body> section of the Web page.
      Style bodyStyle = new Style();

      bodyStyle.ForeColor = System.Drawing.Color.Blue;
      bodyStyle.BackColor = System.Drawing.Color.LightGray;

      // Add the style to the header of the current page.
      Page.Header.StyleSheet.CreateStyleRule(bodyStyle, this, "BODY");

      // Add text to the label2 control to see the style rules applied to it.
      label1.Text = "This is what the bodyStyle looks like.";
    }
  }

</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="head1" runat="server">
    <title>IStyleSheet Example</title>
</head>    
<body>
    <form id="form1" runat="server">
        <h1>IStyleSheet Example</h1>
        <asp:Label 
          id="label1" 
          runat="server">
        </asp:Label>
    </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">
  
  Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
  
    If Not Page.Header Is Nothing Then
    
      ' Create a Style object for the <body> section of the Web page.
      Dim bodyStyle As Style = New Style()

      bodyStyle.ForeColor = System.Drawing.Color.Blue
      bodyStyle.BackColor = System.Drawing.Color.LightGray

      ' Add the style to the header of the current page.
      Page.Header.StyleSheet.CreateStyleRule(bodyStyle, me, "BODY")

      ' Add text to the label2 control to see the style rules applied to it.
      label1.Text = "This is what the bodyStyle looks like."
      
    End If
    
  End Sub


</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="head1" runat="server">
    <title>IStyleSheet Example</title>
</head>    
<body>
    <form id="form1" runat="server">
        <h1>IStyleSheet Example</h1>
        <asp:Label 
          id="label1" 
          runat="server">
        </asp:Label>
    </form>
  </body>
</html>

注解

该方法 CreateStyleRule 为指定的选择器创建样式规则。 可以为同一选择器创建多个样式规则。

如果设置为 null``urlResolver，则使用当前Page实例的 URL。

备注

不支持在异步回发期间以编程方式添加或修改样式或样式规则。 将 AJAX 功能添加到 ASP.NET 网页时，异步回发会更新页面的区域，而无需更新整个页面。 有关详细信息，请参阅 Microsoft Ajax 概述。

适用于