如何使用& C#检查Outlook中是否存在文件夹和子文件夹

Question

我对C#开发非常陌生。我正在尝试使用Exchange服务检查和创建Outlook邮箱中存在的文件夹/子文件夹。

文件夹结构

• MAIN_folder
• 子文件夹-1
• 子文件夹-2
• 子文件夹-3

实现

public void checkFolderExistOrNot( String folder_name)
        {
            FolderView fv = new FolderView(100);

            var findFoldersResults = exchangeService.FindFolders(
                WellKnownFolderName.Inbox,
                new SearchFilter.SearchFilterCollection(
                    LogicalOperator.Or,
                    new SearchFilter.ContainsSubstring(FolderSchema.DisplayName, folder_name)),
                fv);

            foreach (var folder in findFoldersResults)
            {
                if (folder is Folder)
                {
                    if (folder.DisplayName == folder_name)
                    {
                        archiveFolderID = folder.Id;
                    }
                   

                }
            }
            //if archive folder not found create and assign the variable to the folderID
            if (archiveFolderID == null)
            {
                Folder folder = new Folder(exchangeService);
                folder.DisplayName = folder_name;
                folder.Save(WellKnownFolderName.Inbox);
                archiveFolderID = folder.Id;
            }
            
        }

checkFolderExistOrNot(MAIN_folder)
checkFolderExistOrNot(MAIN_folder.Sub Folder-1)
checkFolderExistOrNot(MAIN_folder.Sub Folder-2)
checkFolderExistOrNot(MAIN_folder.Sub Folder-3)

但这只是创建收件箱下的主文件夹。如果有人能帮我找出我在执行过程中缺少的东西，我将不胜感激。

提前谢谢。

Answer 1

你看了Microsoft图一眼吗？

在Microsoft 365中，您基本上可以将它用于任何东西。有了你，你也可以实现你的目标。

您将需要创建一个GraphServiceClient，使用它您可以执行以下操作来检查文件夹是否存在：

string user = "emailAddressOfTheUser";

var parentFolderRequest = graphClient.Users[user].MailFolders.Inbox.ChildFolders
                                                   .Request()
                                                   .Filter($"startsWith(displayName, 'parentFolderName')");

var parentMailFolder = await parentFolderRequest.GetAsync(cancellationToken);

一旦您拥有了父文件夹，您就可以获得它的ID，并且一旦您知道可以搜索它的子文件夹：

var parentMailFolderID = parentMailFolder.First().Id;

var childFolderRequest = graphClient.Users[user].MailFolders[parentMailFolderID].ChildFolders
                                                   .Request()
                                                   .Filter($"startsWith(displayName, 'childFolderName')");

var childMailFolder = await parentFolderRequest.GetAsync(cancellationToken);

如果存在childMailFolder.Count > 0，则创建子文件夹：

var childFolder = new MailFolder
{
   DisplayName = "childFolderName",
   IsHidden = false
};

await graphClient.Users[graphUser.Id]
                 .MailFolders[parentMailFolderID].ChildFolders
                 .Request()
                 .AddAsync(childFolder );