共用方式為


FormsAuthentication.Encrypt(FormsAuthenticationTicket) 方法

定義

建立包含已加密表單驗證票證 (適用於 HTTP Cookie 中) 的字串。

public:
 static System::String ^ Encrypt(System::Web::Security::FormsAuthenticationTicket ^ ticket);
public static string Encrypt (System.Web.Security.FormsAuthenticationTicket ticket);
static member Encrypt : System.Web.Security.FormsAuthenticationTicket -> string
Public Shared Function Encrypt (ticket As FormsAuthenticationTicket) As String

參數

ticket
FormsAuthenticationTicket

FormsAuthenticationTicket 物件,可用來建立已加密的表單驗證票證。

傳回

字串,包含已加密的表單驗證票證。

例外狀況

ticketnull

範例

下列程式代碼範例會使用 FormsCookieName 屬性將 方法的結果Encrypt儲存在 Cookie 中,並將使用者重新導向至從方法傳回的 GetRedirectUrl URL。

重要

此範例包含一個文本框,可接受用戶輸入,這是潛在的安全性威脅。 根據預設,ASP.NET Web 網頁會驗證使用者輸入未包含指令碼或 HTML 項目。 如需詳細資訊,請參閱 Script Exploits Overview (指令碼攻擊概觀)。

<%@ Page Language="C#" %>
<%@ Import Namespace="System.Web.Security" %>
<!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 Login_Click(Object sender, EventArgs e)
  {
    // Create a custom FormsAuthenticationTicket containing
    // application specific data for the user.

    string username     = UserNameTextBox.Text;
    string password     = UserPassTextBox.Text;
    bool   isPersistent = false;

    if (Membership.ValidateUser(username, password))
    {
      string userData = "ApplicationSpecific data for this user.";

      FormsAuthenticationTicket ticket = new FormsAuthenticationTicket(1,
        username,
        DateTime.Now,
        DateTime.Now.AddMinutes(30),
        isPersistent,
        userData,
        FormsAuthentication.FormsCookiePath);

      // Encrypt the ticket.
      string encTicket = FormsAuthentication.Encrypt(ticket);

      // Create the cookie.
      Response.Cookies.Add(new HttpCookie(FormsAuthentication.FormsCookieName, encTicket));

      // Redirect back to original URL.
      Response.Redirect(FormsAuthentication.GetRedirectUrl(username, isPersistent));
    }
    else
    {
      Msg.Text = "Login failed. Please check your user name and password and try again.";
    }
  }

</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
    <title>Forms Authentication Login</title>
</head>
<body>
    <form id="form1" runat="server">
        <span style="BACKGROUND: #80ff80; font-weight:bold"> 
            Login Page
        </span> 
        <asp:Label id="Msg" ForeColor="maroon" runat="server" /><br />
        <table border="0">
            <tbody>
                <tr>
                    <td>Username:</td>
                    <td><asp:TextBox id="UserNameTextBox" runat="server" /></td>
                    <td>
                      <asp:RequiredFieldValidator id="RequiredFieldValidator1" 
                                                  runat="server" ErrorMessage="*" 
                                                  Display="Static" 
                                                  ControlToValidate="UserNameTextBox" />
                    </td>
                </tr>
                <tr>
                    <td>Password:</td>
                    <td><asp:TextBox id="UserPassTextBox" TextMode="Password" runat="server" /></td>
                    <td>
                      <asp:RequiredFieldValidator id="RequiredFieldValidator2" 
                                                  runat="server" ErrorMessage="*" 
                                                  Display="Static" 
                                                  ControlToValidate="UserPassTextBox" />
                    </td>
                </tr>
            </tbody>
        </table>
        <input type="submit" value="Login" runat="server" onserverclick="Login_Click" />
    </form>
</body>
</html>
<%@ Page Language="VB" %>
<%@ Import Namespace="System.Web.Security" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

  Private Sub Login_Click(sender As Object, e As EventArgs)
  
    ' Create a custom FormsAuthenticationTicket containing
    ' application specific data for the user.

        Dim username As String = UserNameTextBox.Text
        Dim password As String = UserPassTextBox.Text
        Dim isPersistent As Boolean = False

    If Membership.ValidateUser(username, password) Then
    
      Dim userData As String = "ApplicationSpecific data for this user."

      Dim ticket As FormsAuthenticationTicket = New FormsAuthenticationTicket(1, _
        username, _
        DateTime.Now, _
        DateTime.Now.AddMinutes(30), _
        isPersistent, _
        userData, _
        FormsAuthentication.FormsCookiePath)

      ' Encrypt the ticket.
      Dim encTicket As String = FormsAuthentication.Encrypt(ticket)

      ' Create the cookie.
      Response.Cookies.Add(New HttpCookie(FormsAuthentication.FormsCookieName, encTicket))

      ' Redirect back to original URL.
      Response.Redirect(FormsAuthentication.GetRedirectUrl(username, isPersistent))
    Else    
      Msg.Text = "Login failed. Please check your user name and password and try again."
    End If
  End Sub

</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
    <title>Forms Authentication Login</title>
</head>
<body>
    <form id="form1" runat="server">
        <span style="BACKGROUND:#80ff80; font-weight:bold"> 
          Login Page
        </span> 
        <asp:Label id="Msg" ForeColor="maroon" runat="server" /><br />
        <table border="0">
            <tbody>
                <tr>
                    <td>Username:</td>
                    <td><asp:TextBox id="UserNameTextBox" runat="server" /></td>
                    <td>
                      <asp:RequiredFieldValidator id="RequiredFieldValidator1" 
                                                  runat="server" ErrorMessage="*" 
                                                  Display="Static" 
                                                  ControlToValidate="UserNameTextBox" />
                    </td>
                </tr>
                <tr>
                    <td>Password:</td>
                    <td><asp:TextBox id="UserPassTextBox" TextMode="Password" runat="server" /></td>
                    <td>
                      <asp:RequiredFieldValidator id="RequiredFieldValidator2" 
                                                  runat="server" ErrorMessage="*" 
                                                  Display="Static" 
                                                  ControlToValidate="UserPassTextBox" />
                    </td>
                </tr>
            </tbody>
        </table>
        <input type="submit" value="Login" runat="server" onserverclick="Login_Click" />
    </form>
</body>
</html>

適用於

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