How to Send Free SMS in C#.NET using SMS API?With Source Code]

watch the designing part in video:

Code:

       

               String result;
                string apiKey = txtapi.Text;
                string numbers = txtnum.Text; // in a comma seperated list
                string message = txtmess.Text;
                string send = txtseder.Text;

                String url = "https://api.txtlocal.com/send/?apikey=" + apiKey + "&numbers=" + numbers + "&message=" + message + "&sender=" + send;
                //refer to parameters to complete correct url string

                StreamWriter myWriter = null;
                HttpWebRequest objRequest = (HttpWebRequest)WebRequest.Create(url);

                objRequest.Method = "POST";
                objRequest.ContentLength = Encoding.UTF8.GetByteCount(url);
                objRequest.ContentType = "application/x-www-form-urlencoded";
                try
                {
                    myWriter = new StreamWriter(objRequest.GetRequestStream());
                    myWriter.Write(url);
                }
                catch (Exception ex)
                {
                    //return e.Message;
                    MessageBox.Show(null, "the error is" + ex, MessageBoxButtons.OK, MessageBoxIcon.Information);
                }
                finally
                {
                    myWriter.Close();
                }

                HttpWebResponse objResponse = (HttpWebResponse)objRequest.GetResponse();
                using (StreamReader sr = new StreamReader(objResponse.GetResponseStream()))
                {
                    result = sr.ReadToEnd();
                    // Close and clean up the StreamReader
                    sr.Close();
                }
                //return result;
                MessageBox.Show(result);
            }



       
 

Import following library file:
using System;
using System.Collections.Generic;
using System.Net;
using System.Collections.Specialized;
using System.IO;

Watch the video: