Registration form with jquery validations

Registration.aspx

<%@ Page Language="C#" MasterPageFile="~/MasterPage.master" AutoEventWireup="true" CodeFile="registration.aspx.cs" Inherits="registration" Title="Untitled Page" %>

<asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server">
    <style type="text/css">
        .style3
        {
            height: 22px;
        }
    </style>
  
    <script type="text/javascript">
        function StandardCheck(source, args)
         {
            var ddlStandards = document.getElementById("<%=ddlStandards.ClientID%>");
            var Standard = ddlStandards.options[ddlStandards.selectedIndex].value;
            if (Standard == "0")
            {
                args.IsValid = false;
            }
            else
            {
             args.IsValid = true;
            }
         }
         function StatesCheck(source, args)
            {
                var ddlStates = document.getElementById("<%=ddlStates.ClientID%>");
                var States = ddlStates.options[ddlStates.selectedIndex].value;
                if (States == "0")
                   {
                     args.IsValid = false;
                    }
                else
                     {
                        args.IsValid = true;
                     }
            }
            function DistrictsCheck(source, args)
            {
                var ddlDistricts = document.getElementById("<%=ddlDistricts.ClientID%>");
                var Districts = ddlDistricts.options[ddlDistricts.selectedIndex].value;
                if (Districts == "0")
                    {
                     args.IsValid = false;
                    }
                else
                    {
                    args.IsValid = true;
                    }
            }
            function QuestionCheck(source, args)
            {
                var ddlSecurityQues = document.getElementById("<%=ddlSecurityQues.ClientID%>");
                var Question = ddlSecurityQues.options[ddlSecurityQues.selectedIndex].value;
                if (Question == "0")
                {
                    args.IsValid = false;
                 }
             else
                 {
                 args.IsValid = true;
                 }
             }
            jQuery(document).ready(function() {
            {
             $("#aspnetForm").validationEngine();
            }
         });
  
    </script>
</asp:Content>
    <asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
    <center>
    <div id="div1" runat="server">
<br/>
<br/>
    <asp:Label ID="lblRegistration" runat="server" Text="Registration Form" Font-Bold="True" ForeColor="#0066FF" Font-Size="Large"></asp:Label>
<br />
<br />
  <table>

    <tr>
            <td align="left" style="font-weight: bold"> Student Details </td> 
    </tr>
    <tr>
            <td align="left">First Name</td>
            <td><asp:TextBox ID="txtFirstName" runat="server" Width="200px" CssClass="validate[Enter FirstName]"></asp:TextBox></td>
    </tr>
    <tr>
            <td align="left">Last Name</td>
            <td><asp:TextBox ID="txtLastName" runat="server" Width="200px" CssClass="validate[required]"></asp:TextBox></td>
    </tr>
    <tr>
            <td align="left">Father Name</td>
            <td><asp:TextBox ID="txtFatherName" runat="server" Width="200px" CssClass="validate[required]" ValidationGroup="d"></asp:TextBox></td>
    </tr>
    <tr>
            <td align="left">Date of Birth</td>
            <td><asp:TextBox ID="txtDOB" runat="server" Width="200px" CssClass="validate[required]"></asp:TextBox></td>
    </tr>
    <tr>
            <td align="left" class="style3">Gender</td>
            <td class="style3">
                <asp:RadioButtonList ID="rbGender" runat="server" RepeatDirection="Horizontal">
                <asp:ListItem  Value="1">Male</asp:ListItem>
                <asp:ListItem Value="0">Female</asp:ListItem>
                </asp:RadioButtonList>
            </td>
    </tr>
    <tr>
            <td align="left">Standard</td>
            <td><asp:DropDownList ID="ddlStandards" runat="server" Height="26px" Width="200px"></asp:DropDownList></td>
            <td><asp:CustomValidator ID="CustomValidator3" runat="server" ErrorMessage="Please Select Standard" ControlToValidate="ddlStandards" ClientValidationFunction="StandardCheck" ValidationGroup="g1" ></asp:CustomValidator></td>
    </tr>
    <tr>
            <td align="left">State</td>
            <td><asp:DropDownList ID="ddlStates" runat="server" Height="26px" Width="200px" AutoPostBack="True" onselectedindexchanged="ddlStates_SelectedIndexChanged"></asp:DropDownList></td>
            <td><asp:CustomValidator ID="CustomValidator1" runat="server" ErrorMessage="Please Select State" ControlToValidate="ddlStates" ClientValidationFunction="StatesCheck" ValidationGroup="g1"></asp:CustomValidator></td>
    </tr>
    <tr>
            <td align="left">District</td>
            <td><asp:DropDownList ID="ddlDistricts" runat="server" Height="26px" Width="200px"></asp:DropDownList></td>
            <td><asp:CustomValidator ID="CustomValidator2" runat="server" ErrorMessage="Please Select District" ControlToValidate="ddlDistricts" ClientValidationFunction="DistrictsCheck" ValidationGroup="g1"></asp:CustomValidator></td>
</tr>
    <tr>
            <td align="left">Address</td>
            <td><asp:TextBox ID="txtAddress" runat="server" TextMode="MultiLine" Width="200px" CssClass="validate[required]" ValidationGroup="d"></asp:TextBox></td>
    </tr>
    <tr>
            <td align="left">Mobile Number</td>
            <td><asp:TextBox ID="txtMobile" runat="server" Width="200px" CssClass="validate[required,custom[integer]"></asp:TextBox></td> 
    </tr>
    <tr>
            <td align="left">Landline Number</td>
            <td><asp:TextBox ID="txtLandline" runat="server" Width="200px" CssClass="validate[required,custom[integer]"></asp:TextBox></td>
    </tr>
    <tr>
            <td align="left">Email Id</td>
            <td><asp:TextBox ID="txtEmail" runat="server" Width="200px" CssClass="validate[required,custom[email]"></asp:TextBox></td>
    </tr>
    Student Login Details
     <tr>
            <td align="left">Login Name</td>
            <td><asp:TextBox ID="txtLoginId" runat="server" CssClass="validate[required]" Width="200px" OnTextChanged="Login_TextChanged" AutoPostBack="true"></asp:TextBox></td>
            <td><asp:Label ID="lblerror" runat="server" Text=""></asp:Label></td>
    </tr>
    <tr>
            <td align="left">Password</td>
            <td><asp:TextBox ID="txtPassword" runat="server" CssClass="validate[required]" TextMode="Password" Width="200px"></asp:TextBox></td>
    </tr>
    <tr>
            <td align="left">Confirm Password</td>
            <td><asp:TextBox ID="txCtPassword" runat="server" CssClass="validate[required]" TextMode="Password" Width="200px"></asp:TextBox> </td>
            <td><asp:CompareValidator ID="comp" runat="server" ControlToValidate="txCtPassword" ControlToCompare="txtPassword" ErrorMessage="*Not Matched"/></td>         
    </tr>
    <tr>
            <td align="left">Security Question</td>
            <td><asp:DropDownList ID="ddlSecurityQues" runat="server" Height="26px" Width="200px"></asp:DropDownList></td>
    </tr>
    <tr>
            <td align="left">Security Answer</td>
            <td><asp:TextBox ID="txtSAnswer" runat="server" CssClass="validate[required]" Width="200px"></asp:TextBox></td>
    </tr>
    <tr>
            <td align="left" colspan="2"><asp:CheckBox ID="cbTerms" runat="server" Text="Check All the above Information is correct"/></td>
    </tr>
    <tr>
            <td align="left">
            <br/><asp:Button ID="btnSubmit" runat="server" Text="Submit" Width="99px" onclick="btnSubmit_Click" CausesValidation="true"/></td>
            <td><asp:Label ID="lblMsg" runat="server" Text=""></asp:Label></td>
    </tr>
</table>

<br/>
<br/>
<br/>
<br/>
</div>
</center>
</asp:Content>

Registration.aspx.cs

using System;

using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using OnlineAcademicExam_BAO;

public partial class registration : System.Web.UI.Page
{
    Register _objReg = new Register();
    PropertiesReg _objProperties = new PropertiesReg(); 
    ListItem _objlistitem = new ListItem("--Select--", "0");

    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            StandardBind();
            StateBind();
            QuestionBind();
        }
        lblerror.Text = "";
    }
    public void Login_TextChanged(object sender,EventArgs e)
    {
        string loginid = txtLoginId.Text;
        int i=_objReg.Check(loginid);
        if (i > 0)
        {
               Response.Write(@"<script language='javascript'>confirm('Already Exist');</script>");
                txtLoginId.Text = "";
        }
        else
        {
            lblerror.Text = "Available";
            lblerror.ForeColor = System.Drawing.Color.Green;
        }
    }
    public void StateBind()
    {
        DataTable _dtTable = _objReg.LoadState();
        if (_dtTable != null && _dtTable.Rows.Count > 0)
        {
            ddlStates.DataSource = _dtTable;
            ddlStates.DataTextField = _dtTable.Columns["statename"].ToString();
            ddlStates.DataValueField = _dtTable.Columns["stateid"].ToString();
            ddlStates.DataBind();
            ddlStates.Items.Insert(0, _objlistitem);
        }
    }
    public void DistrictBind(int stateid)
    {
        DataTable _dtTable = _objReg.LoadDistrict(stateid);
        if (_dtTable != null && _dtTable.Rows.Count > 0)
        {
            ddlDistricts.DataSource = _dtTable;
            ddlDistricts.DataTextField = _dtTable.Columns["DistrictName"].ToString();
            ddlDistricts.DataValueField = _dtTable.Columns["DistrictId"].ToString();
            ddlDistricts.DataBind();
            ddlDistricts.Items.Insert(0, _objlistitem);
        }
    }
    public void QuestionBind()
    {
        DataTable _dtTable = _objReg.LoadQuestions();
        if (_dtTable != null && _dtTable.Rows.Count > 0)
        {
            ddlSecurityQues.DataSource = _dtTable;
            ddlSecurityQues.DataTextField = "SecurityQuestion";
            ddlSecurityQues.DataValueField = "SecurityId";
            ddlSecurityQues.DataBind();
            ddlSecurityQues.Items.Insert(0, _objlistitem);
        }
    }
    public void StandardBind()
    {
        DataTable _dtTable = _objReg.LoadStandard();
        ddlStandards.DataSource = _dtTable;
        ddlStandards.DataTextField = "Standard";
        ddlStandards.DataValueField = "StandardId";
        ddlStandards.DataBind();
        ddlStandards.Items.Insert(0,_objlistitem);
    }
    protected void btnSubmit_Click(object sender, EventArgs e)
    {
        _objProperties.FirstName = txtFirstName.Text;
        _objProperties.LastName = txtLastName.Text;
        _objProperties.FatherName = txtFatherName.Text;
        _objProperties.Gender = Convert.ToInt32(rbGender.SelectedItem.Value).ToString();
        _objProperties.DateofBirth = txtDOB.Text;
        _objProperties.Standard = Convert.ToInt32(ddlStandards.SelectedItem.Value);
        _objProperties.State = Convert.ToInt32(ddlStates.SelectedItem.Value);
        _objProperties.District = Convert.ToInt32(ddlDistricts.SelectedItem.Value);
        _objProperties.Address = txtAddress.Text;
        _objProperties.MobileNumber = txtMobile.Text;
        _objProperties.LandNumber = txtLandline.Text;
        _objProperties.Email = txtEmail.Text;
        _objProperties.LoginName = txtLoginId.Text;
        _objProperties.Password = txtPassword.Text;

        _objProperties.SecurityQuestion = Convert.ToInt32(ddlSecurityQues.SelectedItem.Value);
        _objProperties.Answer = txtSAnswer.Text;

        int i = _objReg.InsertUser(_objProperties);
        if (i > 0)
        {
           // lblMsg.Text = "Register Sucessfully";
            Response.Write(@"<script language='javascript'>confirm('Registered Successfully');</script>");
            Response.Redirect("login.aspx"); 
        }
        else
        {
            Response.Write(@"<script language='javascript'>alert('Registration Failed');</script>");         
        }
    }
    protected void ddlStates_SelectedIndexChanged(object sender, EventArgs e)
    {
        int i = Convert.ToInt32(ddlStates.SelectedItem.Value);
        DistrictBind(i);
    }   
}