Download CSV file from Google Spreadsheet (Google Drive) using minimum c# code

readme.md

Download CSV file from Google Spreadsheet using c# and minimal code

1. Your Google SpreadSheet (Google Drive, Google Docs) document must be set to "Anyone with the link" can view it
2. To get URL press SHARE (top right corner) on Google SpreeadSheet and copy "Link to share".
3. Now add &output=csv parameter to this link
4. Your link will look like: https://docs.google.com/spreadsheet/ccc?key=1234abcd1234abcd1234abcd1234abcd1234abcd1234&usp=sharing&output=csv

downloadCSV.cs

using System;
using System.Net;

namespace ConsoleApplication1
{
    class Program
    {
        public class WebClientEx : WebClient
        {
            public WebClientEx(CookieContainer container)
            {
                this.container = container;
            }

            private readonly CookieContainer container = new CookieContainer();

            protected override WebRequest GetWebRequest(Uri address)
            {
                WebRequest r = base.GetWebRequest(address);
                var request = r as HttpWebRequest;
                if (request != null)
                {
                    request.CookieContainer = container;
                }
                return r;
            }

            protected override WebResponse GetWebResponse(WebRequest request, IAsyncResult result)
            {
                WebResponse response = base.GetWebResponse(request, result);
                ReadCookies(response);
                return response;
            }

            protected override WebResponse GetWebResponse(WebRequest request)
            {
                WebResponse response = base.GetWebResponse(request);
                ReadCookies(response);
                return response;
            }

            private void ReadCookies(WebResponse r)
            {
                var response = r as HttpWebResponse;
                if (response != null)
                {
                    CookieCollection cookies = response.Cookies;
                    container.Add(cookies);
                }
            }
        }

        static void Main(string[] args)
        {
            /*
             1. Your Google SpreadSheet document must be set to 'Anyone with the link' can view it
             
             2. To get URL press SHARE (top right corner) on Google SpreeadSheet and copy "Link to share".
              
             3. Now add "&output=csv" parameter to this link
             
             4. Your link will look like:
                
                https://docs.google.com/spreadsheet/ccc?key=1234abcd1234abcd1234abcd1234abcd1234abcd1234&usp=sharing&output=csv
            */
            string url = @"https://docs.google.com/spreadsheet/ccc?key=1234abcd1234abcd1234abcd1234abcd1234abcd1234&usp=sharing&output=csv"; // REPLACE THIS WITH YOUR URL

            WebClientEx wc = new WebClientEx(new CookieContainer());
            wc.Headers.Add("User-Agent", "Mozilla/5.0 (Windows NT 6.2; WOW64; rv:22.0) Gecko/20100101 Firefox/22.0");
            wc.Headers.Add("DNT", "1");
            wc.Headers.Add("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
            wc.Headers.Add("Accept-Encoding", "deflate");
            wc.Headers.Add("Accept-Language", "en-US,en;q=0.5");

            var outputCSVdata = wc.DownloadString(url);
            Console.Write(outputCSVdata);
        }
    }
}