CSOMAuthentication Manager

Question

填充身份验证管理器返回一个有效的上下文，并且根文件夹已经存在，以下工作：

using Microsoft.SharePoint.Client;
using System;
using System.Collections.Generic;
using System.Linq;
using AuthenticationManager = SharepointOrderContractExtractor.Clients.AuthenticationManager;

namespace SharePointOrderContractExtractor.Clients
{
    public class FolderManager
    {
        private readonly AuthenticationManager _authenticationManager;

        public FolderManager(
            AuthenticationManager sharepointAuthenticationManager
            )
        {
            _authenticationManager = sharepointAuthenticationManager;
        }

        internal Folder EnsureAndGetTargetFolder(string folderPath)
        {
            using ClientContext context = _authenticationManager.GetContext();

            List<string> folderNames = folderPath.Split("/").ToList();
            List documents = context.Web.Lists.GetByTitle(folderNames[0]);
            folderNames.RemoveAt(0);

            return EnsureAndGetTargetFolder(context, documents, folderNames);
        }

        private Folder EnsureAndGetTargetFolder(ClientContext context, List list, List<string> folderPath)
        {
            Folder returnFolder = list.RootFolder;
            return (folderPath != null && folderPath.Count > 0)
                ? EnsureAndGetTargetSubfolder(context, list, folderPath)
                : returnFolder;
        }

        private Folder EnsureAndGetTargetSubfolder(ClientContext context, List list, List<string> folderPath)
        {
            Web web = context.Web;
            Folder currentFolder = list.RootFolder;
            context.Load(web, t => t.Url);
            context.Load(currentFolder);
            context.ExecuteQuery();

            foreach (string folderPointer in folderPath)
            {
                currentFolder = FindOrCreateFolder(context, list, currentFolder, folderPointer);
            }

            return currentFolder;
        }

        private Folder FindOrCreateFolder(ClientContext context, List list, Folder currentFolder, string folderPointer)
        {
            FolderCollection folders = currentFolder.Folders;
            context.Load(folders);
            context.ExecuteQuery();

            foreach (Folder existingFolder in folders)
            {
                if (existingFolder.Name.Equals(folderPointer, StringComparison.InvariantCultureIgnoreCase))
                {
                    return existingFolder;
                }
            }

            return CreateFolder(context, list, currentFolder, folderPointer);
        }

        private Folder CreateFolder(ClientContext context, List list, Folder currentFolder, string folderPointer)
        {
            ListItemCreationInformation itemCreationInfo = new ListItemCreationInformation
            {
                UnderlyingObjectType = FileSystemObjectType.Folder,
                LeafName = folderPointer,
                FolderUrl = currentFolder.ServerRelativeUrl
            };

            ListItem folderItemCreated = list.AddItem(itemCreationInfo);
            folderItemCreated.Update();

            context.Load(folderItemCreated, f => f.Folder);
            context.ExecuteQuery();

            return folderItemCreated.Folder;
        }
    }
}

thinks brian，完美工作！