通过

HttpCapabilitiesBase.CanRenderSetvarZeroWithMultiSelectionList 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支持 value 特性为 0 的 WML <setvar> 元素。

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

属性值

Boolean

如果浏览器支持 true 特性为 <setvar> 的 WML value 元素，则为 0；否则为 false。 默认值为 true。

示例

下面的代码示例演示如何确定浏览器是否支持具有 0 特性的 value WML <setvar> 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).CanRenderSetvarZeroWithMultiSelectionList)
        {
            labelText = "Browser supports HTML SETVAR elements whose VALUE attribute is 0.";
        }
        else
        {
            labelText = "Browser does not support HTML SETVAR elements whose VALUE attribute is 0.";
        }

        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)).CanRenderSetvarZeroWithMultiSelectionList Then
            labelText = "Browser supports HTML SETVAR elements whose VALUE attribute is 0."
        Else
            labelText = "Browser does not support HTML SETVAR elements whose VALUE attribute is 0."
        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

此属性 CanRenderSetvarZeroWithMultiSelectionList 仅适用于 WML 兼容的移动设备。

如果false出现，具有value属性的 0 HTML <setvar> 元素将无法正确显示。

适用于