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Roles.DeleteCookie Method

Deletes the cookie where role names are cached.

Namespace:  System.Web.Security
Assembly:  System.Web (in System.Web.dll)

public static void DeleteCookie()

ExceptionCondition
System.Configuration.Provider.ProviderException

Role management is not enabled.

The DeleteCookie method clears the contents of the cookie that is used to cache role names. For more information on caching role names, see CacheRolesInCookie.

The following code example calls the DeleteCookie method to clear any cached role names when a user logs in. For an example of a Web.config file that enables role management, see Roles.

Security noteSecurity Note

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">

public void Login_OnClick(object sender, EventArgs args)
{
   if (Membership.ValidateUser(UsernameTextbox.Text, PasswordTextbox.Text))
   {
      Roles.DeleteCookie();
      FormsAuthentication.RedirectFromLoginPage(UsernameTextbox.Text, NotPublicCheckbox.Checked);
   }
   else
     Msg.Text = "User authentication failed. Please check your username and password and try again.";
}


</script>

<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
  <title>Login</title>
</head>
<body>

<form id="form1" runat="server">
  <h3>Login</h3>

  <asp:Label id="Msg" ForeColor="maroon" runat="server" /><br />

  Username: <asp:Textbox id="UsernameTextbox" runat="server" /><br />
  Password: <asp:Textbox id="PasswordTextbox" runat="server" TextMode="Password" /><br />

  <asp:Button id="LoginButton" Text="Login" OnClick="Login_OnClick" runat="server" />
  <asp:CheckBox id="NotPublicCheckbox" runat="server" /> Check here if this is <span style="text-decoration:underline">not</span> a public computer

</form>

</body>
</html>

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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