FormsAuthenticationTicket Class
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Provides access to properties and values of the ticket used with forms authentication to identify users. This class cannot be inherited.
public ref class FormsAuthenticationTicket sealed
[System.Serializable]
public sealed class FormsAuthenticationTicket
[<System.Serializable>]
type FormsAuthenticationTicket = class
Public NotInheritable Class FormsAuthenticationTicket
- Inheritance
-
FormsAuthenticationTicket
- Attributes
Examples
The following code example stores the result of the Encrypt method in a cookie using the FormsCookieName and redirects the user to the URL returned from the GetRedirectUrl method.
Important
This example contains a text box that accepts user input, which is a potential security threat. By default, ASP.NET Web pages validate that user input does not include script or HTML elements. For more information, see Script Exploits Overview.
<%@ 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>
Remarks
The FormsAuthenticationTicket class is used to create an object that represents the authentication ticket that is used by forms authentication to identify an authenticated user. The properties and values of a forms-authentication ticket are converted to and from an encrypted string that is stored in a cookie or in the URL.
The FormsAuthentication class provides an Encrypt method to create a string value that can be stored in a cookie or in the URL from a FormsAuthenticationTicket. The FormsAuthentication class also provides a Decrypt method to create a FormsAuthenticationTicket object from the encrypted authentication ticket retrieved from the forms-authentication cookie or the URL.
The FormsAuthenticationTicket for the current authenticated user can be accessed using the Ticket property of the FormsIdentity class. You can access the current FormsIdentity object by casting the Identity property of the current User as type FormsIdentity.
Constructors
FormsAuthenticationTicket(Int32, String, DateTime, DateTime, Boolean, String) |
Initializes a new instance of the FormsAuthenticationTicket class with cookie name, version, expiration date, issue date, persistence, and user-specific data. The cookie path is set to the default value established in the application's configuration file. |
FormsAuthenticationTicket(Int32, String, DateTime, DateTime, Boolean, String, String) |
Initializes a new instance of the FormsAuthenticationTicket class with cookie name, version, directory path, issue date, expiration date, persistence, and user-defined data. |
FormsAuthenticationTicket(String, Boolean, Int32) |
Initializes a new instance of the FormsAuthenticationTicket class using a cookie name and expiration information. |
Properties
CookiePath |
Gets the cookie path for the forms-authentication ticket. |
Expiration |
Gets the local date and time at which the forms-authentication ticket expires. |
Expired |
Gets a value indicating whether the forms-authentication ticket has expired. |
IsPersistent |
Gets a value indicating whether the cookie that contains the forms-authentication ticket information is persistent. |
IssueDate |
Gets the local date and time at which the forms-authentication ticket was originally issued. |
Name |
Gets the user name associated with the forms-authentication ticket. |
UserData |
Gets a user-specific string stored with the ticket. |
Version |
Gets the version number of the ticket. |
Methods
Equals(Object) |
Determines whether the specified object is equal to the current object. (Inherited from Object) |
GetHashCode() |
Serves as the default hash function. (Inherited from Object) |
GetType() |
Gets the Type of the current instance. (Inherited from Object) |
MemberwiseClone() |
Creates a shallow copy of the current Object. (Inherited from Object) |
ToString() |
Returns a string that represents the current object. (Inherited from Object) |