Create a Login Form in ASP.NET using SQL Server Database and Visual Studio

 <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="LoginFormWebApp.WebForm1" %>


<!DOCTYPE html>


<html xmlns="http://www.w3.org/1999/xhtml">

<head runat="server">

    <title></title>

    <style>

        body{

            text-align:center;

            margin-top:10rem;

            font-size:2rem;

        }

        form{

            border:solid;

            margin-left:30%;

            margin-right:30%;

            padding-bottom:10px;

        }

        div{

            padding:5px;

        }

        .btn-login{

            margin-left:5%;

        }

        .checkbox{

            margin-left:15%;

        }

    </style>

</head>

<body>

    <form id="form1" runat="server">

        <div>

            <asp:Label ID="Label1" runat="server" Text="Login Form" ForeColor="#FF0066"></asp:Label>

        </div>

        <div>

            <asp:Label ID="Label2" runat="server" Text="Username"></asp:Label>

            <asp:TextBox ID="TextBox1" runat="server" Height="35px"></asp:TextBox>

        </div>

        <div>

            <asp:Label ID="Label3" runat="server" Text="Password"></asp:Label>

            <asp:TextBox ID="TextBox2" runat="server" TextMode="Password" Height="35px"></asp:TextBox>

        </div>

        <input class="checkbox" type="checkbox" onchange="document.getElementById('TextBox2').type=this.checked ? 'text' : 'password'"/>Show Password

        <div>

            <asp:Button CssClass="btn-login" ID="Button1" runat="server" Text="Login" ForeColor="White" BackColor="#33CC33" Height="30px" Width="80px" OnClick="Button1_Click"/>

            <asp:Button ID="Button2" runat="server" Text="Cancel" ForeColor="White" BackColor="Red" Height="30px" Width="80px"/>

        </div>

    </form>

</body>

</html>

ABOVE FILE IS WebForm1.aspx















using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.SqlClient;
using System.Data;
using System.Configuration;

namespace LoginFormWebApp
{
    public partial class WebForm1 : System.Web.UI.Page
    {
        string cs = ConfigurationManager.ConnectionStrings["dbcs"].ConnectionString;
        protected void Page_Load(object sender, EventArgs e)
        {

        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            try
            {
                using (SqlConnection con = new SqlConnection(cs))
                {
                    con.Open();
                    string loginQuery = "SELECT COUNT(*) FROM login WHERE username=@username AND password=@password";
                    SqlCommand cmd = new SqlCommand(loginQuery,con);
                    cmd.Parameters.AddWithValue("@username",TextBox1.Text);
                    cmd.Parameters.AddWithValue("@password",TextBox2.Text);
                    int count = (int)cmd.ExecuteScalar();
                    con.Close();
                    if (count > 0)
                    {
                        Response.Write("<script>alert('Login Successful !!')</script>");
                    }
                    else
                    {
                        Response.Write("<script>alert('Login Failed !!')</script>");
                    }
                }
            }
            catch (SqlException ex)
            {
                Response.Write("SqlException: " + ex.Message);
            }
            catch (Exception ex)
            {
                Response.Write("Exception: " + ex.Message);
            }
        }
    }
}
ABOVE FILE IS WebForm1.aspx.cs
















<?xml version="1.0" encoding="utf-8"?>
<!--
  For more information on how to configure your ASP.NET application, please visit
  https://go.microsoft.com/fwlink/?LinkId=169433
  -->
<configuration>
  <system.web>
    <compilation debug="true" targetFramework="4.7.2" />
    <httpRuntime targetFramework="4.7.2" />
    <pages>
      <namespaces>
        <add namespace="System.Web.Optimization" />
      </namespaces>
      <controls>
        <add assembly="Microsoft.AspNet.Web.Optimization.WebForms" namespace="Microsoft.AspNet.Web.Optimization.WebForms" tagPrefix="webopt" />
      </controls>
    </pages>
  </system.web>
  <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="Antlr3.Runtime" publicKeyToken="eb42632606e9261f" />
        <bindingRedirect oldVersion="0.0.0.0-3.5.0.2" newVersion="3.5.0.2" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="Microsoft.Web.Infrastructure" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="0.0.0.0-2.0.0.0" newVersion="2.0.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="Newtonsoft.Json" publicKeyToken="30ad4fe6b2a6aeed" />
        <bindingRedirect oldVersion="0.0.0.0-13.0.0.0" newVersion="13.0.0.0" />
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="WebGrease" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="0.0.0.0-1.6.5135.21930" newVersion="1.6.5135.21930" />
      </dependentAssembly>
    </assemblyBinding>
  </runtime>
  <system.codedom>
    <compilers>
      <compiler language="c#;cs;csharp" extension=".cs" type="Microsoft.CodeDom.Providers.DotNetCompilerPlatform.CSharpCodeProvider, Microsoft.CodeDom.Providers.DotNetCompilerPlatform, Version=2.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" warningLevel="4" compilerOptions="/langversion:default /nowarn:1659;1699;1701" />
      <compiler language="vb;vbs;visualbasic;vbscript" extension=".vb" type="Microsoft.CodeDom.Providers.DotNetCompilerPlatform.VBCodeProvider, Microsoft.CodeDom.Providers.DotNetCompilerPlatform, Version=2.0.1.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" warningLevel="4" compilerOptions="/langversion:default /nowarn:41008 /define:_MYTYPE=\&quot;Web\&quot; /optionInfer+" />
    </compilers>
  </system.codedom>
<connectionStrings>
<add name="dbcs" connectionString="Data Source=DESKTOP-77M6N4G\SQLEXPRESS;Initial Catalog=asplogin;Integrated Security=True;TrustServerCertificate=True" providerName="System.Data.SqlClient"/>
</connectionStrings>
</configuration>
ABOVE FILE IS Web.config















CREATE DATABASE asplogin;

USE asplogin;

CREATE TABLE login(
username NVARCHAR(50) NOT NULL,
password NVARCHAR(50) NOT NULL
);

INSERT INTO login(username,password)
VALUES('admin','admin');

SELECT * FROM login;






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