Upload file from local disk to a specific Box folder in C#

Upload file from local disk to a specific Box folder in C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Box.V2;
using Box.V2.Auth;
using Box.V2.Config;
using Box.V2.Exceptions;
using Box.V2.Models;
using Nito.AsyncEx;
using System.IO;

namespace MoveFileFromDiskToBox
{
    //Make sure you install the NuGet package 'Box Windows SDK V2' 

    class Program
    {
        const string CLIENT_ID = "YOUR_CLIENT_ID";
        const string CLIENT_SECRET = "YOUR_CLIENT_SECRET";
        const string DEV_ACCESS_TOKEN = "YOUR_DEV_ACCESS_TOKEN";  //log into developers.box.com and get this for your registered app; it will last for 60 minutes
        const string REFRESH_TOKEN = "THIS_IS_NOT_NECESSARY_FOR_A_DEV_TOKEN_BUT_MUST_BE_HERE";

        //set these to point to whatever file you want to upload; make sure it exists!
        const string PATH_TO_FILE = "C:\\";
        const string FILENAME = "example.pdf";

        const string BOX_FOLDER = "/Personal Backups/Test"; //for this example code, make sure this folder structure exists in Box

        static BoxClient client;

        static void Main(string[] args)
        {
            //http://blog.stephencleary.com/2012/02/async-console-programs.html
            try
            {
                var config = new BoxConfig(CLIENT_ID, CLIENT_SECRET, new Uri("http://localhost"));
                var session = new OAuthSession(DEV_ACCESS_TOKEN, REFRESH_TOKEN, 3600, "bearer");
                client = new BoxClient(config, session);

                AsyncContext.Run(() => MainAsync());
            }
            catch (Exception ex)
            {
                Console.Error.WriteLine(ex);
            }

            Console.WriteLine();
            Console.Write("Press return to exit...");
            Console.ReadLine();
        }

        static async Task MainAsync()
        {
            var boxFolderId = await FindBoxFolderId(BOX_FOLDER);

            using (FileStream fs = File.Open(PATH_TO_FILE + FILENAME, FileMode.Open,FileAccess.Read))
            {
                Console.WriteLine("Uploading file...");

                // Create request object with name and parent folder the file should be uploaded to
                BoxFileRequest request = new BoxFileRequest()
                {
                    Name = FILENAME,
                    Parent = new BoxRequestEntity() { Id = boxFolderId }
                };
                BoxFile f = await client.FilesManager.UploadAsync(request, fs);
            }  
        }

        static async Task<String> FindBoxFolderId(string path)
        {
            var folderNames = path.Split('/');
            folderNames = folderNames.Where((f) => !String.IsNullOrEmpty(f)).ToArray(); //get rid of leading empty entry in case of leading slash

            var currFolderId = "0"; //the root folder is always "0"
            foreach(string folderName in folderNames)
            {
                var folderInfo = await client.FoldersManager.GetInformationAsync(currFolderId);
                var foundFolder = folderInfo.ItemCollection.Entries.OfType<BoxFolder>().First((f) => f.Name == folderName);
                currFolderId = foundFolder.Id;
            }

            return currFolderId;
        }
    }
}

Developer token expires in 60 mins. How to retrieve developer token on every request if it expires

Yes, Developer token expires in 60 mins. How to retrieve developer token on every request if it expires? can we use access token?

generate new token