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HttpCapabilitiesBase.SupportsEmptyStringInCookieValue 屬性

  • 參考

定義

命名空間:
System.Web.Configuration
組件:
System.Web.dll

取得值，指出瀏覽器是否支援 Cookie 值中的空 (null) 字串。

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

屬性值

Boolean

如果瀏覽器支援 Cookie 值中的空 (true) 字串，則為 null，否則為 false。 預設為 false。

範例

下列程式碼範例示範如何判斷瀏覽器是否支援 cookie 值中的空 (null) 字串。

<%@ 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).SupportsFontColor)
        {
            labelText = "Browser supports empty(null) strings in cookie values.";
        }
        else
        {
            labelText = "Browser does not support empty(null) strings in cookie values.";
        }

        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)).SupportsFontColor Then
            labelText = "Browser supports empty(null) strings in cookie values."
        Else
            labelText = "Browser does not support empty(null) strings in cookie values."
        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>

適用於