Making telephone call from asp net application


ASP.NET is a popular programming language used for developing web applications. In this article, we will explore how to make a telephone call from an ASP.NET application. We will provide step-by-step instructions along with code examples to help you understand the process.


Before we , make sure you have the following:

  • An ASP.NET application set up on your machine or a web server.
  • A telephone service provider that supports making calls through an API.
  • An API key or provided by your telephone service provider.

Step 1: Setting up the ASP.NET Application

First, let's set up our ASP.NET application. Create a new ASP.NET project or open an one in your preferred development environment. Make sure you have the necessary permissions to modify the project files.

Next, open the web.config file of your ASP.NET application. This file configuration for your application. Add the following code inside the tag:


Replace YOUR_API_KEY with the API key or credentials provided by your telephone service provider. This key will be used to authenticate your application when making the telephone call.

Step 2: Writing the Code

Now, let's write the code to make the telephone call. In your ASP.NET application, create a new C# class file or open an existing one. Add the following code:

using System;
using System.Configuration;
using System.Net.Http;

public class TelephoneService
    private string telephonyAPIKey;

    public TelephoneService()
        telephonyAPIKey = ConfigurationManager.AppSettings["TelephonyAPIKey"];

    public void MakeCall(string phoneNumber)
        // Code to make the telephone call using the telephonyAPIKey and phoneNumber
        // Example: Use an HTTP client to send a request to the telephone service provider's API
        using (HttpClient client = new HttpClient())
            client.DefaultRequestHeaders.Add("Authorization", "Bearer " + telephonyAPIKey);
            // Add additional headers or parameters as required by your telephone service provider's API
            // Example: client.DefaultRequestHeaders.Add("Content-Type", "application/json");

            // Make the API call to initiate the telephone call
            HttpResponseMessage response = client.PostAsync("", null).Result;

            // Handle the response from the API
            if (response.IsSuccessStatusCode)
                // Call was successfully initiated
                Console.WriteLine("Telephone call initiated successfully.");
                // Call failed
                Console.WriteLine("Failed to initiate telephone call. Error: " + response.StatusCode);

The above code defines a TelephoneService class with a MakeCall method. The MakeCall method takes a phoneNumber and uses the telephonyAPIKey to authenticate the API call. Replace the code with the actual code required by your telephone service provider's API.

Step 3: Calling the MakeCall Method

Finally, let's call the MakeCall method from your ASP.NET application. Open the code-behind file of your ASP.NET page or create a new one. Add the following code:

protected void Page_Load(object sender, EventArgs e)
    TelephoneService telephoneService = new TelephoneService();

Replace PHONE_NUMBER_TO_CALL with the actual number you want to call. This code will initiate the telephone call when the ASP.NET page is loaded.


In this article, we have discussed how to make a telephone call from an ASP.NET application. We provided step-by-step instructions and code examples to guide you through the process. to replace the placeholder values with your own API key and phone number. With this knowledge, you can integrate telephone calling functionality into your ASP.NET applications.

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