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Membership.ValidateUser Method

.NET Framework 2.0

Note: This method is new in the .NET Framework version 2.0.

Verifies that the supplied user name and password are valid.

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

C#
C++
VB
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public static bool ValidateUser (
	string username,
	string password
)
J#
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public static boolean ValidateUser (
	String username, 
	String password
)
JScript
Copy 
public static function ValidateUser (
	username : String, 
	password : String
) : boolean

Parameters

username

The name of the user to be validated.

password

The password for the specified user.

Return Value

true if the supplied user name and password are valid; otherwise, false.

ValidateUser provides an easy way to verify a user name and password from the data source. Note that, if the username parameter is empty or a null reference (Nothing in Visual Basic), an HttpException is thrown.

The following code example shows the login page for an ASP.NET application configured to use forms authentication and the Membership class. If the supplied user credentials are invalid, a message is displayed to the user. Otherwise, the user is redirected to the originally requested URL by the RedirectFromLoginPage method.

C#
VB
Copy 
<%@ Page Language="C#" %>
<%@ Import Namespace="System.Web.Security" %>

<script runat="server">

public void Login_OnClick(object sender, EventArgs args)
{
   if (Membership.ValidateUser(UsernameTextbox.Text, PasswordTextbox.Text))
      FormsAuthentication.RedirectFromLoginPage(UsernameTextbox.Text, NotPublicCheckBox.Checked);
   else
     Msg.Text = "Login failed. Please check your user name and password and try again.";
}


</script>

<html>
<head>
  <title>Login</title>
</head>
<body>

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

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

  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 <u>not</u> a public computer.

</form>

</body>
</html>

Windows 98, Windows 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

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

.NET Framework

Supported in: 2.0
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