Introduction
This code shows how to validate against an XML file for Forms Authentication security in ASP.Net. Please read one of the earlier articles on Forms Authentication for an introduction and to see the required settings in the web.config file.
The Login Page
<%@Page Language="VB" Trace="false"%> <%@ Import Namespace="System.Web.Security" %> <%@ Import Namespace="System.Xml" %> <script language="VB" runat=server> Sub ValidateLogin(Src as Object, E as EventArgs) Dim sXmlPath As String = "C:\Inetpub\wwwroot\users.xml" Dim oXmlDoc As New XmlDocument() Try oXmlDoc.Load(sXmlPath) Catch oError As Exception StatusMessage.innerHTML = "There was an error:<BR>" & oError.Message & "<BR>" _ & oError.Source & "." Exit Sub End Try Dim oXmlUser As XmlNodeList oXmlUser = oXmlDoc.GetElementsByTagname(txtUser.Value) If Not (oXmlUser Is Nothing) Then If txtPwd.Value = oXmlUser(0).FirstChild().Value Then FormsAuthentication.RedirectFromLoginPage(txtUser.Value, false) Else StatusMessage.InnerHtml = "Invalid login" End If End If End Sub </script> <html> <head> <title> Forms Authentication Against An XML File </title> </head> <body> <form method="post" runat="server"> Username: <INPUT type="text" name="txtUser" id="txtUser" runat="server"/> <BR> Password: <INPUT type="password" name="txtPwd" id="txtPwd" runat="server"/> <BR> <INPUT type="submit" OnServerClick="ValidateLogin" runat="server"/> </form> <SPAN id="StatusMessage" runat="server"/> </body> </html>
The XML File
Here is the XML file used to hold the usernames and passwords.
<?xml version="1.0" ?> <users> <!-- format is <username>password</username> --> <user1>pass1</user1> <user2>pass2</user2> <user3>pass3</user3> </users>
About the author
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Name : |
Brad Kingsley |
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Email : |
webteam@orcsweb.com |
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Profile : |
Brad Kingsley is founder and president of ORCS Web, Inc. - a company that provides managed hosting services for clients who develop and deploy their applications on Microsoft Windows platforms. |