C#:powerpoint的外接程序

Question

我目前正在做一个关于powerpoint插件的项目，我想获取sharepoint的一个文件夹里所有图片，但我总是不能得到它，总是报告各种问题

            using (ClientContext context = new ClientContext("https://******.sharepoint.com/sites/AIPPT"))
            {
                var password = new SecureString();
                foreach (char c in "******".ToCharArray())
                {
                    password.AppendChar(c);
                }

                context.Credentials = new SharePointOnlineCredentials("*******", password);
                Web web = context.Web;
                Folder folder = web.GetFolderByServerRelativeUrl("/sites/AIPPT/Shared Documents/General/图片库");

                FileCollection files = folder.Files;
                context.Load(files);
                context.ExecuteQuery();

                // 遍历文件并获取图片
                foreach (Microsoft.SharePoint.Client.File file in files)
                {
                    if (file.Name.EndsWith(".jpg") || file.Name.EndsWith(".png")) MessageBox.Show($"{ file.ServerRelativeUrl}");
                }

            }

System.Net.WebException
  HResult=0x80131509
  Message=基础连接已经关闭: 发送时发生错误。
  Source=Microsoft.SharePoint.Client.Runtime
  StackTrace:
   at Microsoft.SharePoint.Client.Idcrl.SharePointOnlineAuthenticationProvider.GetIdcrlHeader(Uri url, Boolean alwaysThrowOnFailure, EventHandler`1 executingWebRequest)
   at Microsoft.SharePoint.Client.Idcrl.SharePointOnlineAuthenticationProvider.GetAuthenticationCookie(Uri url, String username, SecureString password, Boolean alwaysThrowOnFailure, EventHandler`1 executingWebRequest)
   at Microsoft.SharePoint.Client.SharePointOnlineCredentials.GetAuthenticationCookie(Uri url, Boolean refresh, Boolean alwaysThrowOnFailure)
   at Microsoft.SharePoint.Client.ClientRuntimeContext.SetupRequestCredential(ClientRuntimeContext context, HttpWebRequest request)
   at Microsoft.SharePoint.Client.SPWebRequestExecutor.GetRequestStream()
   at Microsoft.SharePoint.Client.ClientContext.GetWebRequestExecutor()
   at Microsoft.SharePoint.Client.ClientContext.GetFormDigestInfoPrivate()
   at Microsoft.SharePoint.Client.ClientContext.EnsureFormDigest()
   at Microsoft.SharePoint.Client.ClientContext.ExecuteQuery()
   at AI_PPT_BOX.Wpf.TemplateWpf.Apply_Click(Object sender, RoutedEventArgs e) in D:\Desktop\PowerPoint\AI PPT BOX\Wpf\TemplateWpf.xaml.cs:line 184

  此异常最初是在此调用堆栈中引发的: 
    [外部代码]

内部异常 1:
IOException: 无法从传输连接中读取数据: 远程主机强迫关闭了一个现有的连接。。

内部异常 2:
SocketException: 远程主机强迫关闭了一个现有的连接。

我不知道如何解决这个问题。请教

Answer 1

你这个问题不是问过了吗？

看看我上次给你发的回答。