通过

HttpCapabilitiesBase.RequiresLeadingPageBreak 属性

  • 参考

定义

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

获取一个值，该值指示浏览器是否要求网页正文的第一个元素为 HTML <br> 元素。

public:
 virtual property bool RequiresLeadingPageBreak { bool get(); };
public virtual bool RequiresLeadingPageBreak { get; }
member this.RequiresLeadingPageBreak : bool
Public Overridable ReadOnly Property RequiresLeadingPageBreak As Boolean

属性值

Boolean

如果浏览器要求网页正文的第一个元素是 HTML BR 元素，则为 true；否则为 false。 默认值为 false。

示例

下面的代码示例演示如何确定浏览器是否要求网页正文中的第一个元素为 HTML <br> 元素。

<%@ 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)
    {
        CheckBrowserCaps();
    }

    void CheckBrowserCaps()
    {
        String labelText = "";
        System.Web.HttpBrowserCapabilities myBrowserCaps = Request.Browser;
        if (((System.Web.Configuration.HttpCapabilitiesBase)myBrowserCaps).RequiresLeadingPageBreak)
        {
            labelText = "Browser requires that the first element in the body of a web page be an HTML BR element.";
        }
        else
        {
            labelText = "Browser does not require that the first element in the body of a web page be an HTML BR element.";
        }

        Label1.Text = labelText;
    }
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
    <title>Browser Capabilities Sample</title>
</head>
<body>
    <form runat="server" id="form1">
        <div>
            Browser Capabilities:
            <p/><asp:Label ID="Label1" Runat="server" />
        </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">
    Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)
        CheckBrowserCaps()
    End Sub

    Function CheckBrowserCaps()

        Dim labelText As String = ""
        Dim myBrowserCaps As System.Web.HttpBrowserCapabilities = Request.Browser
        If (CType(myBrowserCaps, System.Web.Configuration.HttpCapabilitiesBase)).RequiresLeadingPageBreak Then
            labelText = "Browser requires that the first element in the body of a web page be an HTML BR element."
        Else
            labelText = "Browser does not require that the first element in the body of a web page be an HTML BR element."
        End If

        Label1.Text = labelText

    End Function 'CheckBrowserCaps
</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
    <title>Browser Capabilities Sample</title>
</head>
<body>
    <form runat="server" id="form1">
        <div>
            Browser Capabilities:
            <p/><asp:Label ID="Label1" Runat="server" />
        </div>
    </form>
</body>
</html>

注解

如果true为 ，则服务器控制适配器在网页中的 <body> 标记后面插入附加<br>元素。

适用于