FormsAuthenticationTicket.IsPersistent 屬性
定義
重要
部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。
取得值，指出包含表單驗證票證資訊的 Cookie 是否為持續性。
public:
property bool IsPersistent { bool get(); };public bool IsPersistent { get; }member this.IsPersistent : boolPublic ReadOnly Property IsPersistent As Boolean屬性值
如果核發了持久性 Cookie (跨瀏覽器工作階段儲存的 Cookie)，則為 true，否則為 false。
範例
下列程式代碼範例會顯示目前登入使用者的 屬性值 FormsAuthenticationTicket 。
注意
如果沒有登入的使用者，屬性 Identity 將會是 null ，而且當您嘗試將 Identity 屬性 FormsIdentity 轉換成 物件時，您會收到編譯程式例外狀況。
<%@ Page Language="C#" AutoEventWireup="true"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
private void Page_Load(Object Src, EventArgs e)
{
Welcome.InnerHtml = "Hello, " +
Server.HtmlEncode(User.Identity.Name);
FormsIdentity id = (FormsIdentity)User.Identity;
FormsAuthenticationTicket ticket = id.Ticket;
cookiePath.Text = ticket.CookiePath;
expireDate.Text = ticket.Expiration.ToString();
expired.Text = ticket.Expired.ToString();
isPersistent.Text = ticket.IsPersistent.ToString();
issueDate.Text = ticket.IssueDate.ToString();
name.Text = ticket.Name;
userData.Text = ticket.UserData;
version.Text = ticket.Version.ToString();
}
private void Signout_Click(Object sender, EventArgs e)
{
FormsAuthentication.SignOut();
Response.Write("Logged out - cookie deleted.");
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>Forms Authentication</title>
</head>
<body>
<h3>Forms Authentication Example</h3>
<span id="Welcome" runat="server"> </span>
<form id="form1" runat="server">
<input type="submit" value="Signout" runat="server" onserverclick="Signout_Click" />
<h3>Forms Authentication Ticket Properties</h3>
<table>
<tbody>
<tr>
<td>
CookiePath:
</td>
<td><asp:Label id="cookiePath" runat="server" />
</td>
</tr>
<tr>
<td>
Expiration:
</td>
<td><asp:Label id="expireDate" runat="server" />
</td>
</tr>
<tr>
<td>
Expired:
</td>
<td><asp:Label id="expired" runat="server" />
</td>
</tr>
<tr>
<td>
IsPersistent:
</td>
<td><asp:Label id="isPersistent" runat="server" />
</td>
</tr>
<tr>
<td>
IssueDate:
</td>
<td><asp:Label id="issueDate" runat="server" />
</td>
</tr>
<tr>
<td>
Name:
</td>
<td><asp:Label id="name" runat="server" />
</td>
</tr>
<tr>
<td>
UserData:
</td>
<td><asp:Label id="userData" runat="server" />
</td>
</tr>
<tr>
<td>
Version:
</td>
<td><asp:Label id="version" runat="server" />
</td>
</tr>
</tbody>
</table>
<p>
</p>
</form>
</body>
</html>
<%@ Page Language="VB" AutoEventWireup="true"%>
<!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(sender As Object, e As EventArgs)
Welcome.InnerHtml = "Hello, " + _
Server.HtmlEncode(User.Identity.Name)
Dim id As FormsIdentity = CType(User.Identity, FormsIdentity)
Dim ticket As FormsAuthenticationTicket = id.Ticket
cookiePath.Text = ticket.CookiePath
expireDate.Text = ticket.Expiration.ToString()
expired.Text = ticket.Expired.ToString()
isPersistent.Text = ticket.IsPersistent.ToString()
issueDate.Text = ticket.IssueDate.ToString()
name.Text = ticket.Name
userData.Text = ticket.UserData
version.Text = ticket.Version.ToString()
End Sub
Sub Signout_Click(sender As Object, e As EventArgs)
FormsAuthentication.SignOut()
Response.Write("Logged out - cookie deleted.")
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>Forms Authentication</title>
</head>
<body>
<h3>Forms Authentication Example</h3>
<span id="Welcome" runat="server"> </span>
<form id="form1" runat="server">
<input type="submit" value="Signout" runat="server" onserverclick="Signout_Click" />
<h3>Forms Authentication Ticket Properties</h3>
<table>
<tbody>
<tr>
<td>
CookiePath:
</td>
<td><asp:Label id="cookiePath" runat="server" />
</td>
</tr>
<tr>
<td>
Expiration:
</td>
<td><asp:Label id="expireDate" runat="server" />
</td>
</tr>
<tr>
<td>
Expired:
</td>
<td><asp:Label id="expired" runat="server" />
</td>
</tr>
<tr>
<td>
IsPersistent:
</td>
<td><asp:Label id="isPersistent" runat="server" />
</td>
</tr>
<tr>
<td>
IssueDate:
</td>
<td><asp:Label id="issueDate" runat="server" />
</td>
</tr>
<tr>
<td>
Name:
</td>
<td><asp:Label id="name" runat="server" />
</td>
</tr>
<tr>
<td>
UserData:
</td>
<td><asp:Label id="userData" runat="server" />
</td>
</tr>
<tr>
<td>
Version:
</td>
<td><asp:Label id="version" runat="server" />
</td>
</tr>
</tbody>
</table>
<p>
</p>
</form>
</body>
</html>
