DocuSignDownloadZipFile.cs

using DocuSign.eSign.Api;
using DocuSign.eSign.Client;
using DocuSign.eSign.Model;
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.IO;
using System.Text;

namespace CodingDawg.Sample
{

/*
Dependencies
  Docusign C# SDK
      https://github.com/docusign/docusign-csharp-client
  DocuSign nuget Package
      https://www.nuget.org/packages/DocuSign.eSign.dll/
*/

    public class DocusignApiExamples
    {
        public void GetDocumentZip()
        {
            string envelopeId = "<Add your envelope Id here>";
            string accountId = Init();
            var envApi = new EnvelopesApi();

            // GetDocument() API call returns a MemoryStream
            var docStream = envApi.GetDocument(accountId, envelopeId, "archive");
            // let's save the document to local file system
            string zipName = Path.GetRandomFileName();
            string zipfilePath = @"C:\temp\" + zipName + ".zip";
            using (var fs = new FileStream(zipfilePath, FileMode.Create))
            {
                docStream.Seek(0, SeekOrigin.Begin);
                docStream.CopyTo(fs);
            }

            string extractPath = @"c:\temp\" + zipName;

            //Reference System.IO.Compression.FileSystem assembly for this 
            //http://stackoverflow.com/a/14635025/1219543
            System.IO.Compression.ZipFile.ExtractToDirectory(zipfilePath, extractPath);

            Console.WriteLine("Envelope Documents have been downloaded to:  {0}", extractPath);
        }
      
        public void GetDocumentCombined()
        {
            string envelopeId = "<Add your envelope Id here>";
            string accountId = Init();
            var envApi = new EnvelopesApi();
            var docStream = envApi.GetDocument(accountId, envelopeId, "combined");
            string filePath = @"C:\temp\" + Path.GetRandomFileName() + ".pdf";

            using (var stream = File.Create(filePath))
                docStream.CopyTo(stream);

            //using (var fs = new FileStream(filePath, FileMode.Create))
            //{
            //    docStream.Seek(0, SeekOrigin.Begin);
            //    docStream.CopyTo(fs);
            //}
        }
      
        public void GetDocumentRaw1()
        {
            string envelopeId = "<Add your envelope Id here>";
            string accountId = "<Add your account Id here>";
            string url = _baseUri + "/v2/accounts/" + accountId + "/envelopes/" + envelopeId + "/documents/combined";

            using (var wc = new System.Net.WebClient())
            {
                wc.Headers.Add("X-DocuSign-Authentication", _authHeader);
                wc.DownloadFile(url, @"C:\temp\" + Path.GetRandomFileName() + ".pdf");
            }
        }

        public void GetDocumentRaw2()
        {
            string envelopeId = "<Add your envelope Id here>";
            string accountId = "<Add your account Id here>";
            string url = _baseUri + "/v2/accounts/" + accountId + "/envelopes/" + envelopeId + "/documents/combined";

            var request = (HttpWebRequest)WebRequest.Create(url);
            request.Method = "GET";
            request.Headers.Add("X-DocuSign-Authentication", _authHeader);

            using (var response = (HttpWebResponse)request.GetResponse())
            {
                var fileName = @"C:\temp\" + Path.GetRandomFileName() + ".pdf";
                using (var stream = File.Create(fileName))
                    response.GetResponseStream().CopyTo(stream);
            }
        }

        string _username = "<Add your User Name>";
        string _password = "<Add your Password>";
        string _integratorKey = "<Add your Integrator Key>";
        string _baseUri = "https://demo.docusign.net/restapi";
        string _authHeader;
      
        public DocusignApiExamples()
        {
          // configure 'X-DocuSign-Authentication' header
          _authHeader = "{\"Username\":\"" + username + "\", \"Password\":\"" + password + "\", \"IntegratorKey\":\"" + integratorKey + "\"}";
        }
        public string Init()
        {
            // initialize client for desired environment (for production change to www)
            ApiClient apiClient = new ApiClient(_baseUri);
            Configuration.Default.ApiClient = apiClient;

            Configuration.Default.AddDefaultHeader("X-DocuSign-Authentication", _authHeader);

            // we will retrieve this from the login API call
            string accountId = null;

            /////////////////////////////////////////////////////////////////
            // STEP 1: LOGIN API        
            /////////////////////////////////////////////////////////////////

            // login call is available in the authentication api 
            AuthenticationApi authApi = new AuthenticationApi();
            LoginInformation loginInfo = authApi.Login();

            // parse the first account ID that is returned (user might belong to multiple accounts)
            accountId = loginInfo.LoginAccounts[0].AccountId;

            // Update ApiClient with the new base url from login call
            apiClient = new ApiClient(loginInfo.LoginAccounts[0].BaseUrl);

            return accountId;
        }
    }
}