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How to send SMS using ASP.NET through HTTP (C#)

Hello Guys, This short ASP.NET code snippet is intended to provide you a brief review on how to add SMS functionality to your website. You will see, this is a very simple but smart solution. This ASP.NET application is able to send messages by using HTTP requests towards the SMS gateway that sends the SMSs to the destination telephone via a GSM modem or an IP SMS connection. Let’s take a quick look at the software requirements that are essentially needed for this solution. In order to send SMS messages from your ASP.NET application, you need a development platform, e.g Visual Studio, of course, .NET Framework 4.0, Internet Information Services (IIS) and an SMS gateway (I used Ozeki NG – http://www.ozekisms.com). You also need a GSM modem attached to your PC or an IP SMS connection to be able to send messages. Okay and now let’s use the code snippet! Copy the content of smssend.aspx and smssend.aspx.cs into the main directory of the IIS server - C:\Inetpub\wwwroot\ directory (). Configure the fixed data in the smssend.aspx.cs file (the IP address and port number of the SMS gateway, username, password). Launch your SMS gateway Server. Start a web browser and enter this URL: http://127.0.0.1/smssend.aspx - where 127.0.0.1 means that the smssend.aspx and smssend.aspx.cs files can be found on the same computer on which the browser has been opened). Fill in the required fields, and then click the Send button. It’s as easy as that! Happy coding! :)

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//smssend.sapx

<%@ Page Language="C#" AutoEventWireup="true"  CodeFile="smssend.aspx.cs" Inherits="_Default" validateRequest="false" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>How to send SMS using ASP.NET through HTTP</title>
</head>
<body>
    <center>
    <form id="smsdata" runat="server">
        <asp:Table id="smstable" runat="server" style="text-align:left; border-width:thin; border-color:Silver;" BorderStyle="Solid">
            <asp:TableRow>
                <asp:TableCell ColumnSpan="2">
                    <b>Compose a message:</b>
                    <br />
                    <br />
                </asp:TableCell>
            </asp:TableRow>
            <asp:TableRow>
                <asp:TableCell HorizontalAlign="Left" VerticalAlign="Top">
                    <asp:Label ID="labelRecipient" runat="server" Text="Recipient: "></asp:Label>
                </asp:TableCell>
                <asp:TableCell>
                    <asp:TextBox ID="textboxRecipient" runat="server"></asp:TextBox>
                </asp:TableCell>
            </asp:TableRow>
            <asp:TableRow>
                <asp:TableCell HorizontalAlign="Left" VerticalAlign="Top">
                    <asp:Label ID="labelMessage" runat="server" Text="Message Text: "></asp:Label>
                </asp:TableCell>
                <asp:TableCell>
                    <asp:TextBox ID="textboxMessage" runat="server" TextMode="MultiLine"></asp:TextBox>
                </asp:TableCell>
            </asp:TableRow>
            <asp:TableRow>
                <asp:TableCell ColumnSpan="2" HorizontalAlign="Center">
                    <asp:Button ID="buttonSend" runat="server" Text="Send Message" OnClick="buttonSendOnClick" />
                </asp:TableCell>
            </asp:TableRow>
            <asp:TableRow>
                <asp:TableCell ColumnSpan="2" HorizontalAlign="Center">
                    <asp:TextBox ID="textboxError" runat="server" BorderStyle="None" TextMode="MultiLine"></asp:TextBox>
                </asp:TableCell>
            </asp:TableRow>
        </asp:Table>
    </form>
    </center>
</body>
</html>

//smssend.aspx.cs

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Net;
using System.Text.RegularExpressions;

public partial class _Default : System.Web.UI.Page 
{
    

    protected void Page_Load(object sender, EventArgs e)
    {
        textboxRecipient.Width = 400;
        textboxMessage.Width = 450;
        textboxMessage.Rows = 10;
        textboxError.Width = 400;
        textboxError.Rows = 5;

        textboxError.ForeColor = System.Drawing.Color.Red;
        textboxError.Visible = false;
        textboxError.Text = "";

        if (!Page.IsPostBack)
        {
            textboxRecipient.Text = "+441234567";
            textboxMessage.Text = "Test message!";
        }
    }

    protected void buttonSendOnClick(object sender, EventArgs e)
    {
        //are required fields filled in:
        if (textboxRecipient.Text == "")
        {
            textboxError.Text += "Recipient(s) field must not be empty!\n";
            textboxError.Visible = true;
            return;
        }

        //we creating the necessary URL string:
        string ozSURL = "http://127.0.0.1"; //where the SMS Gateway is running
        string ozSPort = "9501"; //port number where the SMS Gateway is listening
        string ozUser = HttpUtility.UrlEncode("admin"); //username for successful login
        string ozPassw = HttpUtility.UrlEncode("abc123"); //user's password
        string ozMessageType = "SMS:TEXT"; //type of message
        string ozRecipients = HttpUtility.UrlEncode(textboxRecipient.Text); //who will get the message
        string ozMessageData = HttpUtility.UrlEncode(textboxMessage.Text); //body of message

        string createdURL = ozSURL + ":" + ozSPort + "/httpapi" +
            "?action=sendMessage" +
            "&username=" + ozUser +
            "&password=" + ozPassw +
            "&messageType=" + ozMessageType +
            "&recipient=" + ozRecipients +
            "&messageData=" + ozMessageData;

        try
        {
            //Create the request and send data to the SMS Gateway Server by HTTP connection
            HttpWebRequest myReq = (HttpWebRequest)WebRequest.Create(createdURL);

            //Get response from the SMS Gateway Server and read the answer
            HttpWebResponse myResp = (HttpWebResponse)myReq.GetResponse();
            System.IO.StreamReader respStreamReader = new System.IO.StreamReader(myResp.GetResponseStream());
            string responseString = respStreamReader.ReadToEnd();
            respStreamReader.Close();
            myResp.Close();

            //inform the user
            textboxError.Text = responseString;
            textboxError.Visible = true;
        }
        catch (Exception)
        {
            //if sending request or getting response is not successful the SMS Gateway Server may do not run
            textboxError.Text = "The SMS Gateway Server is not running!";
            textboxError.Visible = true;
        }

    }
}
val using : resource:'T -> action:('T -> 'U) -> 'U (requires 'T :> System.IDisposable)

Full name: Microsoft.FSharp.Core.Operators.using
val id : x:'T -> 'T

Full name: Microsoft.FSharp.Core.Operators.id
namespace System
namespace System.Data
namespace System.Configuration
namespace System.Web
namespace System.Web.Security
namespace System.Web.UI
namespace System.Web.UI.WebControls
namespace System.Web.UI.WebControls.WebParts
namespace System.Web.UI.HtmlControls
namespace System.Net
namespace System.Text
namespace System.Text.RegularExpressions
Multiple items
type Page =
  inherit TemplateControl
  new : unit -> Page
  member AddOnPreRenderCompleteAsync : beginHandler:BeginEventHandler * endHandler:EndEventHandler -> unit + 1 overload
  member Application : HttpApplicationState
  member AsyncTimeout : TimeSpan with get, set
  member AutoPostBackControl : Control with get, set
  member Buffer : bool with get, set
  member Cache : Cache
  member ClientQueryString : string
  member ClientScript : ClientScriptManager
  member ClientTarget : string with get, set
  ...

Full name: System.Web.UI.Page

--------------------
System.Web.UI.Page() : unit
namespace System.Drawing
type Color =
  struct
    member A : byte
    member B : byte
    member Equals : obj:obj -> bool
    member G : byte
    member GetBrightness : unit -> float32
    member GetHashCode : unit -> int
    member GetHue : unit -> float32
    member GetSaturation : unit -> float32
    member IsEmpty : bool
    member IsKnownColor : bool
    ...
  end

Full name: System.Drawing.Color
property System.Drawing.Color.Red: System.Drawing.Color
Multiple items
val string : value:'T -> string

Full name: Microsoft.FSharp.Core.Operators.string

--------------------
type string = System.String

Full name: Microsoft.FSharp.Core.string
namespace System.IO
Multiple items
type StreamReader =
  inherit TextReader
  new : stream:Stream -> StreamReader + 9 overloads
  member BaseStream : Stream
  member Close : unit -> unit
  member CurrentEncoding : Encoding
  member DiscardBufferedData : unit -> unit
  member EndOfStream : bool
  member Peek : unit -> int
  member Read : unit -> int + 1 overload
  member ReadLine : unit -> string
  member ReadToEnd : unit -> string
  ...

Full name: System.IO.StreamReader

--------------------
System.IO.StreamReader(stream: System.IO.Stream) : unit
System.IO.StreamReader(path: string) : unit
System.IO.StreamReader(stream: System.IO.Stream, detectEncodingFromByteOrderMarks: bool) : unit
System.IO.StreamReader(stream: System.IO.Stream, encoding: System.Text.Encoding) : unit
System.IO.StreamReader(path: string, detectEncodingFromByteOrderMarks: bool) : unit
System.IO.StreamReader(path: string, encoding: System.Text.Encoding) : unit
System.IO.StreamReader(stream: System.IO.Stream, encoding: System.Text.Encoding, detectEncodingFromByteOrderMarks: bool) : unit
System.IO.StreamReader(path: string, encoding: System.Text.Encoding, detectEncodingFromByteOrderMarks: bool) : unit
System.IO.StreamReader(stream: System.IO.Stream, encoding: System.Text.Encoding, detectEncodingFromByteOrderMarks: bool, bufferSize: int) : unit
System.IO.StreamReader(path: string, encoding: System.Text.Encoding, detectEncodingFromByteOrderMarks: bool, bufferSize: int) : unit
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More information

Link:http://fssnip.net/py
Posted:4 years ago
Author:Aarav Gupta
Tags: send , sms , asp , asp.net , http , request , gateway , c# , csharp , website , iis , internet , information , services , gsm , modem , ip sms , smpp , aspx.cs , aspx

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The first version of fssnip.net has been created by @tomaspetricek back in 2010. This web site is a new, open-source and contribution-friendly version.