aspx page
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="REGISTERINFO.aspx.cs" Inherits="REGISTERAPP.REGISTERINFO" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
  <title>REGISTER FORM</title>
  <script src="Scripts/jquery-3.6.0.js"></script>
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.6.0/jquery.min.js"></script>
  <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/jquery-json/2.6.0/jquery.json.min.js"></script>
  <link rel="stylesheet" type="text/css"
   href="https://cdn.datatables.net/1.11.4/css/jquery.dataTables.min.css" />
  <script src="Scripts/DataTables/jquery.dataTables.js"></script>
  <script src="https://cdn.datatables.net/1.11.4/js/jquery.dataTables.min.js"></script>
  <script type="text/javascript">
    $(document).ready(function () {
      //dataTable provide searching, pagination, sorting for user Defined Table
      $.ajax({
        url: 'WebServiceRegister.asmx/Getdata',
        method: 'get',
        dataType: 'json',
        success: function (data) {
          $('#table1').dataTable({
            paging: true,
            sort: true,
            searching: true,
            data: data,
            columns: [
              { 'data': 'ID' },
              { 'data': 'StudentName' },
              { 'data': 'FatherName' },
              { 'data': 'PhoneNumber' },
              { 'data': 'City' },
              { 'data': 'Email' }
            ],
            error: function () {
              alert("Get DataTable Error");
            },
          });
        },
      });
      $("#Button1").click(function () {
        var detail = {};
        //check all textbox in empty
        if ($('#TextBox0').val() == '' && $('#TextBox1').val() == '' && $('#TextBox2').val() == '' && $('#TextBox3').val() == '' && $('#TextBox4').val() == '' && $('#TextBox5').val() == '') {
          alert("Please Fill the Registration Form");
          return false;
        }
        //if textbox one and more NOT all textbox empty then checkÂ
        detail.ID = $("#TextBox0").val();
        if (detail.ID == '') {
          alert("Please Enter ID");
          return false;
        }
        detail.StudentName = $("#TextBox1").val();
        if (detail.StudentName == '') {
          alert("Please Enter Student Name");
          return false;
        }
        detail.FatherName = $("#TextBox2").val();Â
        if (detail.FatherName == '') {
          alert("Please Enter Father Name");
          return false;
        }
        detail.PhoneNumber = $("#TextBox3").val();
        if (detail.PhoneNumber == '') {
          alert("Please Enter Phone Number");
          return false;
        }
        detail.City = $("#TextBox4").val();
        if (detail.City == '') {
          alert("Please Enter City");
          return false;
        }
        detail.Email = $("#TextBox5").val();
        if (detail.Email == '') {
          alert("Please Enter Email");
          return false;
        }
        //call post method to save the data in DB
        $.ajax({
          url: 'WebServiceRegister.asmx/Savedata',
          method: "post",
          data: '{save: ' + JSON.stringify(detail) + '}',
          contentType: "application/json; charset=utf-8",
          dataType: "json",
          success: function (response) {
            alert("SAVE DATA IN DATABASE");
            location.reload();
            Â
          },
          error: function () {
            alert("saVE ERROR");
          },
        });
        //after save the data in DB then textbox is clear;
        $("#TextBox0").val("");
        $("#TextBox1").val("");
        $("#TextBox2").val("");
        $("#TextBox3").val("");
        $("#TextBox4").val("");
        $("#TextBox5").val("");
        return false;
      });
    });
  </script>
  <style type="text/css">
    *{
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    body {
      background-color: aquamarine;
      font-family: sans-serif;
    }
    .formbox {
      width: 500px;
      background-color: white;
      padding: 30px 20px;
      position: center;
      display: block;
      margin: 10px auto;
      box-shadow: 0 0 15px #ff6a00;
    }
    h3 {
      text-align: center;
      margin-top: 10px;
      color: chocolate;
      font-weight: normal;
      font-family: Book Antiqua;
    }
    .textbox {
      width: 100%;
      border-radius: 3px;
      padding: 8px 5px;
      box-sizing: border-box;
      margin-top: 10px;
      font-size: 15px;
      border: 0.5px solid;
    }
    #Button1 {
      border-style: none;
      border-color: inherit;
      border-width: 0;
      background: #00ff21;
      cursor: pointer;
      color: black;
      width: 260px;
      padding: 10px;
      border-radius: 10px;
      margin: 15px auto;
      display: block;
      font-family: sans-serif;
      font-size: medium;
      font-weight: bold;
      box-shadow: 0 0 5px #808080;
    }
      #Button1:hover {
        background-color: aqua;
      }
    #table1 {
      font-family: sans-serif;
      border-collapse: collapse;
      width: 50%;
      margin-left: auto;
      margin-right: auto;
    }
      #table1 td, #table1 th {
        border: 1px solid black;
        padding: 5px;
        width: 20px;
      }
      #table1 tr:hover {
        background-color: chartreuse;
      }
      #table1 th {
        padding-top: 2px;
        padding-bottom: 2px;
        text-align: center;
        background-color: navajowhite;
        color: black;
      }
  </style>
</head>
<body>
  <div class="formbox">
    <form id="form1" runat="server">
      <h3>Registration Form</h3>
      <asp:TextBox ID="TextBox0" runat="server" CssClass="textbox" placeholder="ID"></asp:TextBox><br />
      <asp:TextBox ID="TextBox1" runat="server" CssClass="textbox" placeholder="Student Name"></asp:TextBox><br />
      <asp:TextBox ID="TextBox2" runat="server" CssClass="textbox" placeholder="Father Name"></asp:TextBox><br />
      <asp:TextBox ID="TextBox3" runat="server" CssClass="textbox" TextMode="Phone" placeholder="Phone Number"></asp:TextBox><br />
      <asp:TextBox ID="TextBox4" runat="server" CssClass="textbox" placeholder="City"></asp:TextBox><br />
      <asp:TextBox ID="TextBox5" runat="server" CssClass="textbox" TextMode="Email" placeholder="Email"></asp:TextBox><br />
      <asp:Button ID="Button1" runat="server" Text="Register" BorderColor="Red" BorderStyle="Solid" />
    </form>
  </div>
  <table id="table1">
    <thead>
      <tr>
        <th>ID</th>
        <th>StudentName</th>
        <th>FatherName</th>
        <th>PhoneNumber</th>
        <th>City</th>
        <th>Email</th>
      </tr>
    </thead>
    <tfoot></tfoot>
  </table>
</body>
</html>
asmx page
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Services;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Configuration;
using System.Data.SqlClient;
using System.Web.Script.Serialization;
namespace REGISTERAPP {
/// <summary>
/// Summary description for WebServiceRegister
/// </summary>
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[System.ComponentModel.ToolboxItem(false)]
// To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line.Â
[System.Web.Script.Services.ScriptService]
public class WebServiceRegister: System.Web.Services.WebService {
public class Savedataclass {
public int ID {
get;
set;
}
public string StudentName {
get;
set;
}
public string FatherName {
get;
set;
}
public string PhoneNumber {
get;
set;
}
public string City {
get;
set;
}
public string Email {
get;
set;
}
}
[WebMethod]
public void Savedata(Savedataclass save) {
SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["Register"].ConnectionString);
SqlCommand cmd = new SqlCommand("INSERT INTO REGISTERFORMTABLE VALUES(@ID, @StudentName, @FatherName, @PhoneNumber, @City, @Email)", con);
cmd.CommandType = CommandType.Text;
cmd.Parameters.AddWithValue("@ID", save.ID);
cmd.Parameters.AddWithValue("@StudentName", save.StudentName);
cmd.Parameters.AddWithValue("@FatherName", save.FatherName);
cmd.Parameters.AddWithValue("@PhoneNumber", save.PhoneNumber);
cmd.Parameters.AddWithValue("@City", save.City);
cmd.Parameters.AddWithValue("@Email", save.Email);
cmd.Connection = con;
con.Open();
cmd.ExecuteNonQuery();
con.Close();
}
[WebMethod]
public void Getdata() {
List < Savedataclass > registerlist = new List < Savedataclass > ();
SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["Register"].ConnectionString);
SqlCommand cmd = new SqlCommand("spGetRegisterselect", con);
cmd.CommandType = CommandType.StoredProcedure;
con.Open();
SqlDataReader rdr = cmd.ExecuteReader();
while (rdr.Read()) {
Savedataclass Info = new Savedataclass();
Info.ID = Convert.ToInt32(rdr["ID"]);
Info.StudentName = rdr["Studentname"].ToString();
Info.FatherName = rdr["Fathername"].ToString();
Info.PhoneNumber = rdr["Phonenumber"].ToString();
Info.City = rdr["City"].ToString();
Info.Email = rdr["Email"].ToString();
registerlist.Add(Info);
}
JavaScriptSerializer js = new JavaScriptSerializer();
Context.Response.Write(js.Serialize(registerlist));
}
}
}