[英]In C#, how can I create a folder if it does not exist on a SharePoint site
我正在嘗試在 C# 中創建一個微服務,它將接受一個包含訂單號的 csv 文件,消化 csv,連接到 sharepoint,在 sharepoint 上創建一個新文件夾,然后從任何地方復制名稱與訂單號相對應的合同(它們可能不會都在 smae 位置)到新文件夾。
此時,在 Stackoverflow 的幫助下,我可以使用CSOM 身份驗證管理器從我們的 Sharepoint 成功獲取身份驗證令牌。 現在我想弄清楚如何創建文件夾。 谷歌搜索有關創建 Sharepoint 文件夾的信息不斷提出列表主題,我對此一無所知,甚至不知道我是否真的想要或需要了解任何信息,或者是否可能有不同的工作方式與該網站,因為那是我真正感興趣的。
因此,假設我在https://example.sharepoint.com/sites/MySite 上有一個 sharepoint 站點。
如何在“共享文檔”中存在的名為“Bar”的文件夾中簡單地創建一個名為“Foo”的文件夾?
如果我需要了解一些關於列表的信息才能做到這一點,我可以使用 C# 來找到正確的列表嗎? 或者我需要找我的管理員獲取更多信息嗎?
假設 AuthenticationManager 返回一個有效的上下文並且根文件夾已經存在,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;
}
}
}
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