Create Login Form in ASP.NET using SQL Server Database

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


<!DOCTYPE html>


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

<head runat="server">

    <title></title>

    <style type="text/css">

        .auto-style1 {

            font-size: xx-large;

            text-align: center;

            color: #00FF00;

        }

        .auto-style2 {

            width: 100%;

            font-size:large;

        }

        .auto-style3 {

            width: 82px;

        }

    </style>

</head>

<body>

    <form id="form1" runat="server">

        <div class="auto-style1">

            <strong>Login Form

        </strong>

        </div>

        <table class="auto-style2">

            <tr>

                <td class="auto-style3">Username</td>

                <td>

                    <asp:TextBox ID="txtuser" runat="server" Width="178px"></asp:TextBox>

                </td>

            </tr>

            <tr>

                <td class="auto-style3">Password</td>

                <td>

                    <asp:TextBox ID="txtpass" runat="server" Width="178px"></asp:TextBox>

                </td>

            </tr>

            <tr>

                <td class="auto-style3">&nbsp;</td>

                <td>

                    <asp:Button ID="Button1" runat="server" Text="Login" OnClick="Button1_Click"/>

                </td>

            </tr>

        </table>

    </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;
using System.Runtime.InteropServices;

namespace LoginForm
{
    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 query = "SELECT COUNT(*) FROM aspnew WHERE username=@username AND password=@password";
                    SqlCommand cmd = new SqlCommand(query,con);
                    cmd.Parameters.AddWithValue("@username",txtuser.Text);
                    cmd.Parameters.AddWithValue("@password",txtpass.Text);
                    SqlDataAdapter sda = new SqlDataAdapter(cmd);
                    DataTable data = new DataTable();
                    sda.Fill(data);
                    cmd.ExecuteNonQuery();
                    if (data.Rows[0][0].ToString() == "1")
                    {
                        Response.Write("<script>alert('successful in login')</script>");
                        Response.Redirect("WebForm2.aspx");
                    }
                    else
                    {
                        Response.Write("<script>alert('error in login')</script>");
                    }
                }
            }
            catch (SqlException ex)
            {
                Response.Write("SqlException: " + ex.Message);
            }
            catch (Exception ex)
            {
                Response.Write("Exception: " + ex.Message);
            }
        }
    }
}
ABOVE FILE IS WebForm1.aspx.cs













<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm2.aspx.cs" Inherits="LoginForm.WebForm2" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
        <div>
        </div>
    </form>
</body>
</html>
ABOVE FILE IS WebForm2.aspx
















<?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=aspnew;Integrated Security=True;TrustServerCertificate=True" providerName="System.Data.SqlClient"/>
</connectionStrings>
</configuration>
ABOVE FILE IS Web.config





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