Sunday, 1 April 2018

Send OTP ( One Time Password ) SMS to Verify user Mobile Number in Asp.Net C#

Important Namespaces Used
--------------------------

using System.Net;
using System.Data;
using System.Data.SqlClient;
using System.Collections.Specialized;


---------------------------


(Send Otp) Button Click Event Coding
--------------------------------------

Panel1.Visible = false;
        Panel2.Visible = true;
        Random random = new Random();
        int value = random.Next(1001, 9999);
        string destinationaddr = "91" + TextBox1.Text;
        string message = "Your OTP Number is " + value + " ( Sent By : Coding Logic and Syntax )";
        //Label3.Text = message;
        String message1 = HttpUtility.UrlEncode(message);

        using (var wb = new WebClient())
        {
            byte[] response = wb.UploadValues("https://api.textlocal.in/send/", new NameValueCollection()
                {
                {"apikey" , "FammnpFW0Ks-gRKkiQvnke2nG940NkDbbl4jUV4elK"},
                {"numbers" , destinationaddr},
                {"message" , message1},
                {"sender" , "TXTLCL"}
                });
            string result = System.Text.Encoding.UTF8.GetString(response);
            Session["otp"] = value;


        }


--------------------------------------


( Verify ) Button Click Event Coding
--------------------------------------

 if(TextBox2.Text==Session["otp"].ToString())
        {
            Panel2.Visible = false;
            Label3.Text = "Your Mobile Number Has Been Verified Successfully - Thanks";
        }
        else
        {
            Label3.Text = "OTP Number is Not Correct : Your Mobile Number not Verified";
            Panel2.Visible = true;
        }


----------------------------------------
at

7 comments:

  1. Unknown3 July 2018 at 11:20

    this is not working .I cannot send MSG

    API key -"uxCstHkdalY-OfYbCOrFXl0F4nqPmGboWDC7sUiOuJ"

    I need your help .



    below is my code
    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Web;
    using System.Web.UI;
    using System.Web.UI.WebControls;

    using System.Net;
    using System.Data;
    using System.Data.SqlClient;
    using System.Collections.Specialized;

    namespace OTP_generation
    {
    public partial class Mobile_Verification : System.Web.UI.Page
    {
    protected void Page_Load(object sender, EventArgs e)
    {

    }

    protected void Button1_Click(object sender, EventArgs e)
    {
    Panel1.Visible = false;
    Panel2.Visible = true;
    try
    {

    Random random = new Random();
    int value = random.Next(1001, 9999);
    string destinationaddr = "91" + TextBoxmob.Text;
    string message = "Your OTP Number is" + value + "(Sent by Payal Morekar----Testing Testing)";
    string message1 = HttpUtility.UrlEncode(message);


    using (var wb = new WebClient())
    {
    byte[] response = wb.UploadValues("https://api.textlocal.in/send/", new NameValueCollection()
    {
    {"apikey" , "uxCstHkdalY-OfYbCOrFXl0F4nqPmGboWDC7sUiOuJ"},
    {"numbers" , destinationaddr},
    {"message" , message1},
    {"sender" , "TXTLCL"}
    });
    string result = System.Text.Encoding.UTF8.GetString(response);
    Session["otp"] = value;

    }
    }
    catch (Exception es)
    {
    Response.Write(es.ToString());
    }
    }

    protected void Buttonverotp_Click(object sender, EventArgs e)
    {
    if (TextBoxotp.Text == Session["otp"].ToString())
    {
    Panel2.Visible = false;
    Response.Write("Your Mobile Number Has Been Verified Successfully - Thanks");
    }
    else
    {
    Response.Write("OTP Number is Not Correct : Your Mobile Number not Verified");
    Panel2.Visible = true;
    }

    }




    }
    }

    ReplyDelete
  2. Prem Pandey12 March 2019 at 03:25

    very useful code.

    ReplyDelete
  3. Unknown1 April 2019 at 03:57

    OTP message is not showing the message

    ReplyDelete
  4. Utsav Mevada6 April 2019 at 08:43

    Not Working Properly
    i Need Your Help



    using System;
    using System.Collections.Generic;
    using System.Net;
    using System.Collections.Specialized;
    using System.IO;
    using System.Text;


    using System.Web;
    using System.Net;
    using System.Data;
    using System.Data.SqlClient;
    using System.Collections.Specialized;

    public partial class User_OTP : System.Web.UI.Page
    {
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void Button1_Click(object sender, EventArgs e)
    {
    Panel1.Visible = false;
    Panel2.Visible = true;
    Random random = new Random();
    int value = random.Next(1001, 9999);
    string destinationaddr = "91" + TextBox1.Text;
    string message = "Your OTP Number is " + value + " ( Sent By : Coding Logic and Syntax )";
    //Label3.Text = message;
    String message1 = HttpUtility.UrlEncode(message);

    using (var wb = new WebClient())
    {
    byte[] response = wb.UploadValues("https://api.textlocal.in/send/", new NameValueCollection()
    {
    {"apikey" , "Lqn5n6ovuDM-tfn3l6kNLpHHaMA2X8Usl0brJORqyU"},
    {"numbers" , destinationaddr},
    {"message" , message1},
    {"sender" , "TXTLCL"}
    });
    string result = System.Text.Encoding.UTF8.GetString(response);
    Session["otp"] = value;
    }

    }
    protected void Button2_Click(object sender, EventArgs e)
    {
    if (TextBox2.Text == Session["otp"].ToString())
    {
    Panel2.Visible = false;
    Response.Write("Your Mobile Number Has Been Verified Successfully - Thanks");
    }
    else
    {
    Response.Write("OTP Number is Not Correct : Your Mobile Number not Verified");
    Panel2.Visible = true;
    }


    }

    }

    ReplyDelete
  5. Shivangi Rathore22 August 2019 at 01:49

    Thanks for sharing
    plz check : OTP SMS delivers instantly

    ReplyDelete
  6. Unknown5 September 2020 at 23:42

    verified mobile number is not receiving OTP

    ReplyDelete
  7. jodi27 October 2021 at 03:32

    That is really nice to hear. thank you for the update and good luck. Ben Luker Modern Behaviour

    ReplyDelete

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