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Simple ASP.Net Login Page using C#

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Join Date: Feb 2003 Posts: 793 Reputation: Solved Threads: 26

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Simple ASP.Net Login Page using C#

0

May 23rd, 2005 Simple ASP.NET

Login

#1

Page using C# ( ASP.NET 1.0 & 1.1 ONLY!!! NOT 2.0)

This is just a small demonstration to show how easy one can "port" the code from my previous tutorials ( Updated: Simple ASP.Net

Login

Page & ASP.Net

Login

Page with SQL & ASP.Net Registration Page ) over to another programming language in the .NET environment. In this example I chose to use C#. So for all considerations this tutorial is an exact duplicate of the Updated: Simple ASP.NET

Login

Page using VB.NET that I did previously, but using SQL instead of

Access for the DB RELATED FORUM FEATURES C# Forum

1. Create a Login Webform (HTML/ASP.NET)

Software Development Forum

- Include any control validation you feel necessary.

C# Upvoted Threads (61) NorthCSharp.aspx C# Solved Threads (1,364) (Toggle Plain Text) <%@

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C# Code Snippets (133) language="c#" Codebehind=" Login .aspx.cs" AutoEventWireup="false" Inherits="NorthCSharp.Web

AutoEventWireup="false" Inherits="NorthCSharp.WebForm1" %>

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Login : Password:

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2. Create the Code Behind (C#) - One thing to note here, you use the keyword using instead of import to "import/include" the namespaces you require for security, data access, etc. - Also note how clean and short the code structure is when comparing VB.Net to C#. Now in my opinion, I love VB.Net far more than C# or C++, as I find it more intuitive, but each to his own.

NorthCSharp.aspx.cs

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using System; using System.Collections; using System.ComponentModel; using System.Data; using System.Drawing; using System.Web; using System.Web.SessionState; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.HtmlControls; // <summmary> // What has been added for Login Page // for this application to function // using System.Web.Security; using System.Data.SqlClient; using System.Configuration; namespace NorthCSharp { /// <summary> /// Summary description for WebForm1. /// public class WebForm1 : System.Web.UI.Page { protected System.Web.UI.WebControls.TextBox txtUserName; protected System.Web.UI.WebControls.RequiredFieldValidator rvUserValidator; protected System.Web.UI.WebControls.TextBox txtPassword; protected System.Web.UI.WebControls.RequiredFieldValidator rvPasswordValidator; protected System.Web.UI.WebControls.Button cmdSubmit; protected System.Web.UI.WebControls.ValidationSummary Validationsummary1; protected System.Web.UI.WebControls.Label lblMessage; protected System.Web.UI.WebControls.Label lblMessage2; private void Page_Load(object sender, System.EventArgs e) { // Put user code to initialize the

page

here

} #region Web Form Designer generated code override protected void OnInit(EventArgs e) { // // CODEGEN: This call is required by the

ASP.NET

Web Form

Designer. // InitializeComponent(); base.OnInit(e); } /// <summary> /// Required method for Designer support - do not modify /// the contents of this method with the code editor. /// private void InitializeComponent() { this.cmdSubmit.Click += new System.EventHandler (this.cmdSubmit_Click); this.Load += new System.EventHandler(this.Page_Load); } #endregion private void cmdSubmit_Click(object sender, System.EventArgs e) { if ( Page .IsValid) {

if (DBConnection(txtUserName.Text.Trim(), txtPassword.Text.Trim())) { FormsAuthentication.RedirectFromLoginPage (txtUserName.Text, false); } else { lblMessage.Text = "Invalid }

Login , please try again!";

} } private bool DBConnection(string txtUser, string txtPass) { SqlConnection myConn = new SqlConnection (ConfigurationSettings.AppSettings["strConn"]); SqlCommand myCmd = new SqlCommand("sp_ValidateUser", myConn); myCmd.CommandType = CommandType.StoredProcedure; SqlParameter objParam1; SqlParameter objParam2; SqlParameter returnParam; objParam1 = myCmd.Parameters.Add ("@UserName", SqlDbType.VarChar); objParam2 = myCmd.Parameters.Add ("@Password", SqlDbType.VarChar); returnParam = myCmd.Parameters.Add ("@Num_of_User", SqlDbType.Int); objParam1.Direction = ParameterDirection.Input; objParam2.Direction = ParameterDirection.Input; returnParam.Direction = ParameterDirection.ReturnValue; objParam1.Value = txtUser; objParam2.Value = txtPass; try { if (myConn.State.Equals(ConnectionState.Closed)) { myConn.Open(); myCmd.ExecuteNonQuery(); } if ((int)returnParam.Value < 1) { lblMessage.Text = "Invalid return false; }

Login !";

else { myConn.Close(); return true; } } catch (Exception ex) { lblMessage2.Text = ex + "Error Connecting to the database"; return false; } } } }

3. Add the following line to the Web.Config file to enable DB access - Notice that this is no different than the one used in the VB.Net Example - I have removed my login info from the strConn, don't forget to add yours in place! Web.Config

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] <system.web>