在 C# 中，如果 SharePoint 站点上不存在文件夹，我该如何创建该文件夹

Question

我正在尝试在 C# 中创建一个微服务，它将接受一个包含订单号的 csv 文件，消化 csv，连接到 sharepoint，在 sharepoint 上创建一个新文件夹，然后复制名称与订单号相对应的合同从他们所在的任何地方（他们可能不会都在 smae 的地方）到新文件夹。

此时，在 Whosebug 的帮助下，我可以使用 CSOM Authentication Manager 从我们的 Sharepoint 成功获取身份验证令牌。现在我想弄清楚如何创建文件夹。谷歌搜索有关创建 Sharepoint 文件夹的信息不断提出列表的主题，我对此一无所知，甚至不知道我是否真的想要或需要知道任何事情，或者是否有不同的工作方式我真正感兴趣的是网站。

所以，假设我在 https://example.sharepoint.com/sites/MySite 有一个共享点网站。

我怎样才能简单地在“共享文档”中存在的名为“Bar”的文件夹中创建一个名为“Foo”的文件夹？

如果我需要了解一些关于列表的知识才能执行此操作，我可以使用 C# 找到正确的列表吗？或者我是否需要追问我的管理员以获取更多信息？

Answer 1

假设 AuthenticationManager returns 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;
        }
    }
}

在 C# 中，如果 SharePoint 站点上不存在文件夹，我该如何创建该文件夹

In C#, how can I create a folder if it does not exist on a SharePoint site

c#

sharepoint

csom

shared-directory

create-directory