Concatenating Javascript with html in C# Code behind page

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C#

ASP.NET

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Hello Guys

I want to Concatenate Javascript function with anchor tag that is coded in Code behind Cs file.
The purpose is to show a messege with the url to navigate the client to his login page if he has been already registered inside a popup window. How can i achieve it. Please tell?

HTML

<%@ Page Title="Registration" Language="C#" MasterPageFile="~/include/master/customer.master"
  AutoEventWireup="true" CodeFile="registeration.aspx.cs" Inherits="registeration" %>

<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="Server">
<script type="text/javascript" src="/include/js/ModalPopupWindow.js">
</script>
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="Server">
  <div class="container mg">
    <div class="wrapper_adminpannel">
      <div class="container_content c_login_bg">
        <div class="customer_login c_txt">
          <div class="c_login_area c_login_hed c_login_center">
            Register Customer
          </div>
          <div style="padding-left:10px; text-align:justify">
            <asp:Label ID="lblTop" runat="server" Text="Label"  ForeColor="Red" Font-Size="16px"
              Visible="false"></asp:Label></div>
          <div class="login_area1 h2" style="padding-top: 36px">
            <asp:Label ID="lblFirstName" runat="server" Font-Size="X-Large"><span style ="color:Red">*</span>First Name</asp:Label></div>
          <div class="c_login_area c_login_center">
            <asp:TextBox ID="txtFirstName" CssClass="login_field" runat="server" autofocus="autofocus"></asp:TextBox>
            <div>
              <asp:RequiredFieldValidator ID="rfvFirstName" runat="server" ErrorMessage="Fill Details"
                ControlToValidate="txtFirstName" ForeColor="Red" Font-Size="17px"></asp:RequiredFieldValidator></div>
          </div>
          <div class="login_area1 h2" style="padding-top: 28px">
            <asp:Label ID="lblMiddleName" runat="server" Text="Middle Name" Font-Size="X-Large"></asp:Label></div>
          <div class="c_login_area c_login_center">
            <asp:TextBox ID="txtMiddleName" CssClass="login_field" runat="server" Font-Size="X-Large"></asp:TextBox>
          </div>
          <div class="login_area1 h2" style="padding-top: 51px">
            <asp:Label ID="lblLastName" runat="server" Font-Size="X-Large"><span style ="color:Red">*</span>Last Name</asp:Label></div>
          <div class="c_login_area c_login_center">
            <asp:TextBox ID="txtLastName" CssClass="login_field"  runat="server"></asp:TextBox>
            <div>
              <asp:RequiredFieldValidator ID="rfvLastName" runat="server" ForeColor="Red" Font-Size="17px"
                ErrorMessage="Fill Details" ControlToValidate="txtLastName"></asp:RequiredFieldValidator>
            </div>
          </div>
          <div class="login_area1 h2" style="padding-top: 29px">
            <asp:Label ID="lblEmail" runat="server" Font-Size="X-Large"><span style ="color:Red">*</span>Email</asp:Label></div>
          <div class="c_login_area c_login_center">
            <asp:TextBox ID="txtEmail" CssClass="login_field" runat="server"></asp:TextBox>
            <div>
              <span>
                <asp:Label ID="lblMessage" runat="server" Text="Label" ForeColor="Red" Font-Size="15px"
                  Visible="false"></asp:Label></span>
              <div>
                <asp:RegularExpressionValidator ID="revEmail" runat="server" ErrorMessage="Invalid Email"
                  Font-Size="17px" SetFocusOnError="true" ForeColor="Red" ControlToValidate="txtEmail"
                  ValidationExpression="\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*"></asp:RegularExpressionValidator>
              </div>
            </div>
          </div>
          <div class="login_area1 h2" style="padding-top: 27px">
            <asp:Label ID="lblPassword" runat="server" Font-Size="X-Large"><span style ="color:Red">*</span>Password<span class="comment_style">(should not contain spaces)</span></asp:Label></div>
          <div class="c_login_area c_login_center">
            <asp:TextBox ID="txtPassword" CssClass="login_field" runat="server" TextMode="Password"></asp:TextBox>
            <div>
              <asp:RequiredFieldValidator ID="rfvPassword" runat="server" ForeColor="Red" Font-Size="17px"
                ErrorMessage="Fill Details" ControlToValidate="txtPassword"></asp:RequiredFieldValidator>
            </div>
          </div>
          <div class="login_area1 h2" style="padding-top: 28px">
            <asp:Label ID="lblConfirmPassword" runat="server" Font-Size="X-Large"><span style ="color:Red">*</span>Confirm Password</asp:Label></div>
          <div class="c_login_area c_login_center">
            <asp:TextBox ID="txtConfirmPassword" CssClass="login_field" runat="server" TextMode="Password"></asp:TextBox>
            <div>
              <asp:RequiredFieldValidator ID="rfvConfirmPassword" runat="server" ErrorMessage="Fill Details"
                ControlToValidate="txtConfirmPassword" ForeColor="Red" Font-Size="17px"></asp:RequiredFieldValidator></div>
            <span>
              <asp:CompareValidator ID="cvConfirmPassword" runat="server" ErrorMessage="Password does not Match"
                ControlToValidate="txtConfirmPassword" ForeColor="Red" Font-Size="15px" ControlToCompare="txtPassword"></asp:CompareValidator></span>
          </div>
          <div class="login_area1 h2">
            <asp:Label ID="lblMobile" runat="server" Text=" Mobile" Font-Size="X-Large"></asp:Label></div>
          <div class="c_login_area c_login_center">
            <asp:TextBox ID="txtMobile" CssClass="login_field" runat="server"></asp:TextBox>
          </div>
          <div class="login_area1 h2" style="padding-top: 40px">
            <asp:Label ID="lblPhone" runat="server" Text="Phone" Font-Size="X-Large"></asp:Label></div>
          <div class="c_login_area c_login_center">
            <asp:TextBox ID="txtPhone" CssClass="login_field" runat="server"></asp:TextBox>
          </div>
          <div class="login_area1 h2" style="padding-top: 48px">
            <asp:Label ID="lblComments" runat="server" Font-Size="X-Large">Comments<span class="comment_style">(Not exceeding 450 characters)</span></asp:Label></div>
          <div class="c_login_area c_login_center">
            <asp:TextBox ID="txtComments" CssClass="comment_field" runat="server"
              TextMode="MultiLine"></asp:TextBox><span><asp:RegularExpressionValidator ID="revComments"
                runat="server" ErrorMessage="You cannot specify more than 450 characters"
              Font-Size="17px" ForeColor="Red" ValidationExpression="^[\s\S]{0,450}$"
              ControlToValidate="txtComments"></asp:RegularExpressionValidator></span>
          </div>
          <div style="padding-left:20px">
            <asp:Label ID="lblRequiredField" runat="server" Font-Size="17px"><span style ="color:Red">*</span>Required Field</asp:Label>
            </div>
          <div class="c_login_area" style="padding-top:50px">
            <asp:Button ID="btnRegister" CssClass="login_btn" runat="server" Text="Register"
              OnClick="btnRegister_Click"/>
          </div>
          <asp:CustomValidator ID="CsvEmail" runat="server" Font-Size="17px" ForeColor="Red"
            OnServerValidate="btnRegister_Click" ControlToValidate="txtEmail" Visible="false"></asp:CustomValidator>
          <div>
            <asp:HiddenField ID="hdField" runat="server" />
          </div>
        </div>
      </div>
    </div>
  </div>
  <script>
    var popup = CreateModalPopUpObject();
    function Confirmation() {
      popup.ShowMessage("You are Successfully Registered", 400, 400, "Messege");
    }

    function VerificationPending() {
      popup.ShowMessage("This email address is already registered but your account verification is pending. Please check your email address for verification code and enter your code", 250, 400, "Verification Messege")
    }

  </script>
</asp:Content>

CS File

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Text;
using System.Data;
using CloudPOS;

public partial class registeration : System.Web.UI.Page
{
  private string m_sPageUrl = string.Empty;
  private string m_sEmail = string.Empty;

  protected void Page_Load(object sender, EventArgs e)
  {
    if (!IsPostBack)
    {
      this.clearFunction();
    }
  }

  protected void btnRegister_Click(object sender, EventArgs e)
  {
    CommonUsercl oCommonUsercl = new CommonUsercl();
    DataTable oDatatable = oCommonUsercl.GetUserTypeDetails(txtEmail.Text, CommonUsercl.eUserType.Client_Customer);
    bool bVerified = oCommonUsercl.GetVerifiedUser(txtEmail.Text, CommonUsercl.eUserType.Client_Customer);
    int iUserId = oCommonUsercl.GetUserId(txtEmail.Text, CommonUsercl.eUserType.Client_Customer);
    if (oDatatable.Rows.Count > 0 && bVerified == true)
    {
      //CsvEmail.ErrorMessage = "This email address is already registered. To login or reset your password, please click on the link. <a style='color:white; font-size:15px' href='/customer/customer_login.aspx'>Login/Reset Password</a>";
      //lblTop.Text = CsvEmail.ErrorMessage;
      //lblTop.Visible = true;
      ScriptManager.RegisterStartupScript(this, GetType(), "none", "<script>Confirmation();</script>", false);
    }
    else if (oDatatable.Rows.Count > 0 && bVerified == false)
    {
      //CsvEmail.ErrorMessage = "This email address is already registered but your account verification is pending. Please check your email address for verification code and enter your code <a style='color:white; font-size:15px' href='/verify.aspx?i=" + iUserId + "'>here</a>";
      //lblTop.Text = CsvEmail.ErrorMessage;
      //lblTop.Visible = true;
      ScriptManager.RegisterStartupScript(this, GetType(), "none", "<script>VerificationPending();</script>", false);


    }
    else if (string.IsNullOrEmpty(txtEmail.Text) == true)
    {
      CsvEmail.ErrorMessage = "Fill Details";
      lblTop.Visible = false;
      lblMessage.Text = CsvEmail.ErrorMessage;
      lblMessage.Visible = true;
    }
    else
    {
      int iVerificationCode = this.GenerateRandomVerificationCode();
      hdField.Value = Stringcl.GetValue(oCommonUsercl.AddUserDetails(txtEmail.Text.Trim(), txtPassword.Text.Trim(), CommonUsercl.GetUserTypeId(CommonUsercl.eUserType.Client_Customer), txtFirstName.Text.Trim(), txtMiddleName.Text.Trim(), txtLastName.Text.Trim(), txtMobile.Text.Trim(), txtPhone.Text.Trim(), txtComments.Text.Trim(), Stringcl.GetValue(iVerificationCode), false, true));
      string sName = txtFirstName.Text;
      string sEmail = "<html><head><title>CloudPOS - Verify Your Account</title></head><body><p>Dear " + sName + ", </p>";
      sEmail += " <p> We have received your request to set up a new account. To ensure account security please click on the link below to complete verification :</p>";
      sEmail += "<p><b>Verification Url</b> : <a href='" + Applicationcl.GetWebsiteUrl() + "/verify.aspx?i=" + hdField.Value + "'>"
      + Applicationcl.GetWebsiteUrl() + "/verify.aspx?i=" + hdField.Value + "</a><br/><b>Authentication Code</b> : " + iVerificationCode
      + "#EMAIL_SIGNATURE#</body></html>";
      Emailcl oEmailcl = new Emailcl();
      oEmailcl.SendEmail(Emailcl.enmModule.Regular, txtEmail.Text, "", "CloudPOS: Verfication Mail", sEmail, true);
      //lblTop.Text = "Your registeration is complete. An email has been sent to your email address. Please verify your credentials and login <a style='color:white; font-size:15px' href='/customer/customer_login.aspx'>here.</a>";
      //lblTop.Visible = true;
      ScriptManager.RegisterStartupScript(this, GetType(), "none", "<script>Confirmation();</script>", false);
    }
  }

  public int GenerateRandomVerificationCode()
  {
    Random oRandom = new Random();
    int iVerificationCode = oRandom.Next(10000, 99999);
    return iVerificationCode;
  }

  private void clearFunction()
  {
    txtFirstName.Text = string.Empty;
    txtMiddleName.Text = string.Empty;
    txtLastName.Text = string.Empty;
    txtPhone.Text = string.Empty;
    txtMobile.Text = string.Empty;
    txtComments.Text = string.Empty;
    lblTop.Text = string.Empty;
    txtEmail.Text = string.Empty;
  }
}