Google Short Url in asp.net c#

Many times we have some very long URL to show or send someone, we use short URL technique (URL shortening is a technique on the World Wide Web in which a Uniform Resource Locator may be made substantially shorter and still direct to the required page. This is achieved by using a redirect which links to the web page that has a long URL.)  to short the URL.

Here we use Google short URL technique for short the URL in asp.net c#

Step1. First, you have your own API key so you can GET API KEY

Code Behind (C#):-

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Net;

using System.IO;

using System.Text;

using System.Text.RegularExpressions;

public partial class short_url : System.Web.UI.Page

{

    protected void Page_Load(object sender, EventArgs e)

    {

        if (!IsPostBack)

        {

            Shortenurl();

        }

    }

    string key = "AIzaSyCTMnlo3HBIM5l_yPeyTaEsVBjAnqCXtfA";

    public void Shortenurl()

    {

        string url = "https://www.neerajcodesolutions.com/2018/10/google-short-url-in-aspnet-c.html";

        string post = "{\"longUrl\": \"" + url + "\"}";

        string shorturl = url;

        HttpWebRequest request = (HttpWebRequest)

            WebRequest.Create("https://www.googleapis.com/urlshortener/v1/url?key=" + key);

        try

        {

            request.ServicePoint.Expect100Continue = false;

            request.Method = "POST";

            request.ContentLength = post.Length;

            request.ContentType = "application/json";

            request.Headers.Add("Cache-Control", "no-cache");

            using (Stream requestStream = request.GetRequestStream())

            {

                byte[] postBuffer = Encoding.ASCII.GetBytes(post);

                requestStream.Write(postBuffer, 0, postBuffer.Length);

            }

            using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())

            {

                using (Stream responseStream = response.GetResponseStream())

                {

                    using (StreamReader responseReader = new StreamReader(responseStream))

                    {

                        string json = responseReader.ReadToEnd();

                        shorturl = Regex.Match(json, @"""id"": ?""(?<id>.+)""").Groups["id"].Value;

                    }

                }

            }

            Response.Write(shorturl);

        }

        catch (Exception ex)

        {

           

            Response.Write(ex.Message);

            Response.Write(ex.StackTrace);

        }

    }

}