How to Send a WhatsApp API using C#

How to Send a WhatsApp API using C#-alvochat
Contents hide
1 Introduction
2 Send template using WhatsApp API and c#
3 Send a text message using WhatsApp API and c#
4 Send image
5 Send audio
6 Send video
7 Send document
8 Send sticker
9 Send Contact
10 Send Location
11 Send list
12 Send button
13 Send products

Introduction

In this c# code snippet, you learn how to send a WhatsApp API using c-sharp, to send a text message, WhatsApp Templates, media, interactive buttons, lists, products … etc, Alvochat account is required to run the following codes. Create an Account if you don’t have one.

Initially, you must make sure that the RestSharp library last Ver: 108.0.1 is ready because we will use this library in this article to send Whatsapp messages to the Alvochat Gateway.

Send template using WhatsApp API and c#

using System;
using System.Threading.Tasks;
using RestSharp;

public class Program
{
    public static async Task Main()
    {

        var url = "https://api.alvochat.com/instance1199/messages/template";
        var client = new RestClient(url);

        var request = new RestRequest(url, Method.Post);    
        request.AddHeader("content-type", "application/x-www-form-urlencoded");
              request.AddParameter("token", "YourToken");
            request.AddParameter("to", "16315555555");
            request.AddParameter("name", "hello_world");
            request.AddParameter("language", "en_us");
            request.AddParameter("header", "");
            request.AddParameter("body", "");
            request.AddParameter("buttons", "");
            request.AddParameter("priority", "");


        RestResponse response = await client.ExecuteAsync(request);
        var output = response.Content;
        Console.WriteLine(output);
    }
}
using System;
using System.Threading.Tasks;
using RestSharp;

public class Program
{
    public static async Task Main()
    {

        var url = "https://api.alvochat.com/instance1199/messages/template";
        var client = new RestClient(url);

        var request = new RestRequest(url, Method.Post);    
        request.AddHeader("content-type", "application/x-www-form-urlencoded");
  			request.AddParameter("token", "YourToken");
			request.AddParameter("to", "16315555555");
			request.AddParameter("name", "hello_world");
			request.AddParameter("language", "en_us");
			request.AddParameter("header", "");
			request.AddParameter("body", "");
			request.AddParameter("buttons", "");
			request.AddParameter("priority", "");


        RestResponse response = await client.ExecuteAsync(request);
        var output = response.Content;
        Console.WriteLine(output);
    }
}

Send a text message using WhatsApp API and c#

using System;
using System.Threading.Tasks;
using RestSharp;

public class Program
{
    public static async Task Main()
    {

        var url = "https://api.alvochat.com/instance1199/messages/chat";
        var client = new RestClient(url);

        var request = new RestRequest(url, Method.Post);    
        request.AddHeader("content-type", "application/x-www-form-urlencoded");
              request.AddParameter("token", "YourToken");
            request.AddParameter("to", "16315555555");
            request.AddParameter("body", "WhatsApp API on alvochat.com works good");
            request.AddParameter("priority", "");
            request.AddParameter("preview_url", "");
            request.AddParameter("message_id", "");


        RestResponse response = await client.ExecuteAsync(request);
        var output = response.Content;
        Console.WriteLine(output);
    }
}
using System;
using System.Threading.Tasks;
using RestSharp;

public class Program
{
    public static async Task Main()
    {

        var url = "https://api.alvochat.com/instance1199/messages/chat";
        var client = new RestClient(url);

        var request = new RestRequest(url, Method.Post);    
        request.AddHeader("content-type", "application/x-www-form-urlencoded");
  			request.AddParameter("token", "YourToken");
			request.AddParameter("to", "16315555555");
			request.AddParameter("body", "WhatsApp API on alvochat.com works good");
			request.AddParameter("priority", "");
			request.AddParameter("preview_url", "");
			request.AddParameter("message_id", "");


        RestResponse response = await client.ExecuteAsync(request);
        var output = response.Content;
        Console.WriteLine(output);
    }
}

Send image 

using System;
using System.Threading.Tasks;
using RestSharp;

public class Program
{
    public static async Task Main()
    {

        var url = "https://api.alvochat.com/instance1199/messages/image";
        var client = new RestClient(url);

        var request = new RestRequest(url, Method.Post);    
        request.AddHeader("content-type", "application/x-www-form-urlencoded");
              request.AddParameter("token", "YourToken");
            request.AddParameter("to", "16315555555");
            request.AddParameter("image", "https://alvochat-example.s3-accelerate.amazonaws.com/image/1.jpeg");
            request.AddParameter("caption", "image caption");
            request.AddParameter("priority", "");
            request.AddParameter("message_id", "");


        RestResponse response = await client.ExecuteAsync(request);
        var output = response.Content;
        Console.WriteLine(output);
    }
}
using System;
using System.Threading.Tasks;
using RestSharp;

public class Program
{
    public static async Task Main()
    {

        var url = "https://api.alvochat.com/instance1199/messages/image";
        var client = new RestClient(url);

        var request = new RestRequest(url, Method.Post);    
        request.AddHeader("content-type", "application/x-www-form-urlencoded");
  			request.AddParameter("token", "YourToken");
			request.AddParameter("to", "16315555555");
			request.AddParameter("image", "https://alvochat-example.s3-accelerate.amazonaws.com/image/1.jpeg");
			request.AddParameter("caption", "image caption");
			request.AddParameter("priority", "");
			request.AddParameter("message_id", "");


        RestResponse response = await client.ExecuteAsync(request);
        var output = response.Content;
        Console.WriteLine(output);
    }
}

Send audio 

using System;
using System.Threading.Tasks;
using RestSharp;

public class Program
{
    public static async Task Main()
    {

        var url = "https://api.alvochat.com/instance1199/messages/audio";
        var client = new RestClient(url);

        var request = new RestRequest(url, Method.Post);    
        request.AddHeader("content-type", "application/x-www-form-urlencoded");
              request.AddParameter("token", "YourToken");
            request.AddParameter("to", "16315555555");
            request.AddParameter("audio", "https://alvochat-example.s3-accelerate.amazonaws.com/audio/1.mp3");
            request.AddParameter("priority", "");
            request.AddParameter("message_id", "");


        RestResponse response = await client.ExecuteAsync(request);
        var output = response.Content;
        Console.WriteLine(output);
    }
}
using System;
using System.Threading.Tasks;
using RestSharp;

public class Program
{
    public static async Task Main()
    {

        var url = "https://api.alvochat.com/instance1199/messages/audio";
        var client = new RestClient(url);

        var request = new RestRequest(url, Method.Post);    
        request.AddHeader("content-type", "application/x-www-form-urlencoded");
  			request.AddParameter("token", "YourToken");
			request.AddParameter("to", "16315555555");
			request.AddParameter("audio", "https://alvochat-example.s3-accelerate.amazonaws.com/audio/1.mp3");
			request.AddParameter("priority", "");
			request.AddParameter("message_id", "");


        RestResponse response = await client.ExecuteAsync(request);
        var output = response.Content;
        Console.WriteLine(output);
    }
}

Send video 

using System;
using System.Threading.Tasks;
using RestSharp;

public class Program
{
    public static async Task Main()
    {

        var url = "https://api.alvochat.com/instance1199/messages/video";
        var client = new RestClient(url);

        var request = new RestRequest(url, Method.Post);    
        request.AddHeader("content-type", "application/x-www-form-urlencoded");
              request.AddParameter("token", "YourToken");
            request.AddParameter("to", "16315555555");
            request.AddParameter("video", "https://alvochat-example.s3-accelerate.amazonaws.com/video/1.mp4");
            request.AddParameter("caption", "video caption");
            request.AddParameter("priority", "");
            request.AddParameter("message_id", "");


        RestResponse response = await client.ExecuteAsync(request);
        var output = response.Content;
        Console.WriteLine(output);
    }
}
using System;
using System.Threading.Tasks;
using RestSharp;

public class Program
{
    public static async Task Main()
    {

        var url = "https://api.alvochat.com/instance1199/messages/video";
        var client = new RestClient(url);

        var request = new RestRequest(url, Method.Post);    
        request.AddHeader("content-type", "application/x-www-form-urlencoded");
  			request.AddParameter("token", "YourToken");
			request.AddParameter("to", "16315555555");
			request.AddParameter("video", "https://alvochat-example.s3-accelerate.amazonaws.com/video/1.mp4");
			request.AddParameter("caption", "video caption");
			request.AddParameter("priority", "");
			request.AddParameter("message_id", "");


        RestResponse response = await client.ExecuteAsync(request);
        var output = response.Content;
        Console.WriteLine(output);
    }
}

Send document 

using System;
using System.Threading.Tasks;
using RestSharp;

public class Program
{
    public static async Task Main()
    {

        var url = "https://api.alvochat.com/instance1199/messages/document";
        var client = new RestClient(url);

        var request = new RestRequest(url, Method.Post);    
        request.AddHeader("content-type", "application/x-www-form-urlencoded");
              request.AddParameter("token", "YourToken");
            request.AddParameter("to", "16315555555");
            request.AddParameter("document", "https://alvochat-example.s3-accelerate.amazonaws.com/document/1.pdf");
            request.AddParameter("filename", "");
            request.AddParameter("priority", "");
            request.AddParameter("message_id", "");


        RestResponse response = await client.ExecuteAsync(request);
        var output = response.Content;
        Console.WriteLine(output);
    }
}
using System;
using System.Threading.Tasks;
using RestSharp;

public class Program
{
    public static async Task Main()
    {

        var url = "https://api.alvochat.com/instance1199/messages/document";
        var client = new RestClient(url);

        var request = new RestRequest(url, Method.Post);    
        request.AddHeader("content-type", "application/x-www-form-urlencoded");
  			request.AddParameter("token", "YourToken");
			request.AddParameter("to", "16315555555");
			request.AddParameter("document", "https://alvochat-example.s3-accelerate.amazonaws.com/document/1.pdf");
			request.AddParameter("filename", "");
			request.AddParameter("priority", "");
			request.AddParameter("message_id", "");


        RestResponse response = await client.ExecuteAsync(request);
        var output = response.Content;
        Console.WriteLine(output);
    }
}

Send sticker

using System;
using System.Threading.Tasks;
using RestSharp;

public class Program
{
    public static async Task Main()
    {

        var url = "https://api.alvochat.com/instance1199/messages/sticker";
        var client = new RestClient(url);

        var request = new RestRequest(url, Method.Post);    
        request.AddHeader("content-type", "application/x-www-form-urlencoded");
              request.AddParameter("token", "YourToken");
            request.AddParameter("to", "16315555555");
            request.AddParameter("sticker", "https://alvochat-example.s3-accelerate.amazonaws.com/sticker/1.webp");
            request.AddParameter("priority", "");
            request.AddParameter("message_id", "");


        RestResponse response = await client.ExecuteAsync(request);
        var output = response.Content;
        Console.WriteLine(output);
    }
}
using System;
using System.Threading.Tasks;
using RestSharp;

public class Program
{
    public static async Task Main()
    {

        var url = "https://api.alvochat.com/instance1199/messages/sticker";
        var client = new RestClient(url);

        var request = new RestRequest(url, Method.Post);    
        request.AddHeader("content-type", "application/x-www-form-urlencoded");
  			request.AddParameter("token", "YourToken");
			request.AddParameter("to", "16315555555");
			request.AddParameter("sticker", "https://alvochat-example.s3-accelerate.amazonaws.com/sticker/1.webp");
			request.AddParameter("priority", "");
			request.AddParameter("message_id", "");


        RestResponse response = await client.ExecuteAsync(request);
        var output = response.Content;
        Console.WriteLine(output);
    }
}

Send Contact

using System;
using System.Threading.Tasks;
using RestSharp;

public class Program
{
    public static async Task Main()
    {

        var url = "https://api.alvochat.com/instance1199/messages/contact";
        var client = new RestClient(url);

        var request = new RestRequest(url, Method.Post);    
        request.AddHeader("content-type", "application/x-www-form-urlencoded");
              request.AddParameter("token", "YourToken");
            request.AddParameter("to", "16315555555");
            request.AddParameter("contact", "");
            request.AddParameter("priority", "");
            request.AddParameter("message_id", "");


        RestResponse response = await client.ExecuteAsync(request);
        var output = response.Content;
        Console.WriteLine(output);
    }
}
using System;
using System.Threading.Tasks;
using RestSharp;

public class Program
{
    public static async Task Main()
    {

        var url = "https://api.alvochat.com/instance1199/messages/contact";
        var client = new RestClient(url);

        var request = new RestRequest(url, Method.Post);    
        request.AddHeader("content-type", "application/x-www-form-urlencoded");
  			request.AddParameter("token", "YourToken");
			request.AddParameter("to", "16315555555");
			request.AddParameter("contact", "");
			request.AddParameter("priority", "");
			request.AddParameter("message_id", "");


        RestResponse response = await client.ExecuteAsync(request);
        var output = response.Content;
        Console.WriteLine(output);
    }
}

Send Location 

using System;
using System.Threading.Tasks;
using RestSharp;

public class Program
{
    public static async Task Main()
    {

        var url = "https://api.alvochat.com/instance1199/messages/location";
        var client = new RestClient(url);

        var request = new RestRequest(url, Method.Post);    
        request.AddHeader("content-type", "application/x-www-form-urlencoded");
              request.AddParameter("token", "YourToken");
            request.AddParameter("to", "16315555555");
            request.AddParameter("lat", "37.484296");
            request.AddParameter("lng", "-122.148703");
            request.AddParameter("address", "Menlo Park, California, United States");
            request.AddParameter("name", "Meta Headquarters");
            request.AddParameter("priority", "");
            request.AddParameter("message_id", "");


        RestResponse response = await client.ExecuteAsync(request);
        var output = response.Content;
        Console.WriteLine(output);
    }
}
using System;
using System.Threading.Tasks;
using RestSharp;

public class Program
{
    public static async Task Main()
    {

        var url = "https://api.alvochat.com/instance1199/messages/location";
        var client = new RestClient(url);

        var request = new RestRequest(url, Method.Post);    
        request.AddHeader("content-type", "application/x-www-form-urlencoded");
  			request.AddParameter("token", "YourToken");
			request.AddParameter("to", "16315555555");
			request.AddParameter("lat", "37.484296");
			request.AddParameter("lng", "-122.148703");
			request.AddParameter("address", "Menlo Park, California, United States");
			request.AddParameter("name", "Meta Headquarters");
			request.AddParameter("priority", "");
			request.AddParameter("message_id", "");


        RestResponse response = await client.ExecuteAsync(request);
        var output = response.Content;
        Console.WriteLine(output);
    }
}

Send list

using System;
using System.Threading.Tasks;
using RestSharp;

public class Program
{
    public static async Task Main()
    {

        var url = "https://api.alvochat.com/instance1199/messages/list";
        var client = new RestClient(url);

        var request = new RestRequest(url, Method.Post);    
        request.AddHeader("content-type", "application/x-www-form-urlencoded");
              request.AddParameter("token", "YourToken");
            request.AddParameter("to", "16315555555");
            request.AddParameter("header", "header");
            request.AddParameter("body", " please select one of the following options");
            request.AddParameter("footer", "footer");
            request.AddParameter("button", "options");
            request.AddParameter("sections", "option_1,option_2,option_3");
            request.AddParameter("priority", "");
            request.AddParameter("message_id", "");


        RestResponse response = await client.ExecuteAsync(request);
        var output = response.Content;
        Console.WriteLine(output);
    }
}
using System;
using System.Threading.Tasks;
using RestSharp;

public class Program
{
    public static async Task Main()
    {

        var url = "https://api.alvochat.com/instance1199/messages/list";
        var client = new RestClient(url);

        var request = new RestRequest(url, Method.Post);    
        request.AddHeader("content-type", "application/x-www-form-urlencoded");
  			request.AddParameter("token", "YourToken");
			request.AddParameter("to", "16315555555");
			request.AddParameter("header", "header");
			request.AddParameter("body", " please select one of the following options");
			request.AddParameter("footer", "footer");
			request.AddParameter("button", "options");
			request.AddParameter("sections", "option_1,option_2,option_3");
			request.AddParameter("priority", "");
			request.AddParameter("message_id", "");


        RestResponse response = await client.ExecuteAsync(request);
        var output = response.Content;
        Console.WriteLine(output);
    }
}

Send button

using System;
using System.Threading.Tasks;
using RestSharp;

public class Program
{
    public static async Task Main()
    {

        var url = "https://api.alvochat.com/instance1199/messages/button";
        var client = new RestClient(url);

        var request = new RestRequest(url, Method.Post);    
        request.AddHeader("content-type", "application/x-www-form-urlencoded");
              request.AddParameter("token", "YourToken");
            request.AddParameter("to", "16315555555");
            request.AddParameter("header", "header");
            request.AddParameter("body", " please select one of the following options");
            request.AddParameter("footer", "footer");
            request.AddParameter("buttons", "option_1,option_2,option_3");
            request.AddParameter("priority", "");
            request.AddParameter("message_id", "");


        RestResponse response = await client.ExecuteAsync(request);
        var output = response.Content;
        Console.WriteLine(output);
    }
}
using System;
using System.Threading.Tasks;
using RestSharp;

public class Program
{
    public static async Task Main()
    {

        var url = "https://api.alvochat.com/instance1199/messages/button";
        var client = new RestClient(url);

        var request = new RestRequest(url, Method.Post);    
        request.AddHeader("content-type", "application/x-www-form-urlencoded");
  			request.AddParameter("token", "YourToken");
			request.AddParameter("to", "16315555555");
			request.AddParameter("header", "header");
			request.AddParameter("body", " please select one of the following options");
			request.AddParameter("footer", "footer");
			request.AddParameter("buttons", "option_1,option_2,option_3");
			request.AddParameter("priority", "");
			request.AddParameter("message_id", "");


        RestResponse response = await client.ExecuteAsync(request);
        var output = response.Content;
        Console.WriteLine(output);
    }
}

Send products 

using System;
using System.Threading.Tasks;
using RestSharp;

public class Program
{
    public static async Task Main()
    {

        var url = "https://api.alvochat.com/instance1199/messages/product";
        var client = new RestClient(url);

        var request = new RestRequest(url, Method.Post);    
        request.AddHeader("content-type", "application/x-www-form-urlencoded");
              request.AddParameter("token", "YourToken");
            request.AddParameter("to", "16315555555");
            request.AddParameter("header", "header");
            request.AddParameter("body", "Hi , check out our new products");
            request.AddParameter("footer", "footer");
            request.AddParameter("catalog_id", "");
            request.AddParameter("product", "");
            request.AddParameter("priority", "");
            request.AddParameter("message_id", "");


        RestResponse response = await client.ExecuteAsync(request);
        var output = response.Content;
        Console.WriteLine(output);
    }
}
using System;
using System.Threading.Tasks;
using RestSharp;

public class Program
{
    public static async Task Main()
    {

        var url = "https://api.alvochat.com/instance1199/messages/product";
        var client = new RestClient(url);

        var request = new RestRequest(url, Method.Post);    
        request.AddHeader("content-type", "application/x-www-form-urlencoded");
  			request.AddParameter("token", "YourToken");
			request.AddParameter("to", "16315555555");
			request.AddParameter("header", "header");
			request.AddParameter("body", "Hi , check out our new products");
			request.AddParameter("footer", "footer");
			request.AddParameter("catalog_id", "");
			request.AddParameter("product", "");
			request.AddParameter("priority", "");
			request.AddParameter("message_id", "");


        RestResponse response = await client.ExecuteAsync(request);
        var output = response.Content;
        Console.WriteLine(output);
    }
}

You can see the Full Whatsapp API Documentation here.