namespace SendSmsMessage
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void btnSend_Click(object sender, EventArgs e)
        {
            using (System.Net.WebClient client = new System.Net.WebClient()
            {
                try
                    {
                        string url = "http://smsc.vianett.no/v3/send.ashx?" +
                            "src=" + txtPhoneNumber.Text + "&" +
                            "dst=" + txtPhoneNumber.Text + "&" +
                            "msg="System.Web.HttpUtility.UrlEncode(txtMessage.Text, System.Text.Encoding.GetEncoding("ISO-8859-1")) + "" +
                            "username=" + System.Web.HttpUtility.UrlEncode(txtUsername.Text + "&" +
                            "password=" + System.Web.HttpUtility.UrlEncode(txtPassword.Text);
                        string result = client.DownloadString(url);
                        if (result.Contains("OK"))
                            MessageBox.Show("Tvoje zprava byla uspesne odeslana.", "Message", MessageBoxButtons.OK, MessageBoxIcon.Information);
                        else
                            MessageBox.Show("Chyba: Zpravu nebylo mozne odeslat", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    }
                    catch (Exception ex)
                    {
                        MessageBox.Show(ex.Message, "Message", MessageBoxButtons.OK, MessageBoxIcon.Error);
                    }
        }
    }
}