Question

我想将文件从URL上传到Sharepoint Online。我查找了各种类，我找到的那个看起来不错的类WebClient，我试图将已上传到我的应用程序网站的文件拉到一个流中，然后将该流上传到我的目标列表在Sharepoint中，我得到的只是一个＆＃34; 403 Forbidden＆＃34;异常。

    WebClient wc = new WebClient(); 
    wc.UseDefaultCredentials = true;
    wc.Headers.Add("User-Agent:Other");
        byte[] response = wc.DownloadData
("www.mysite-12345.sharepoint.com/sites/dev/myapp/lists/doclib/themefile.spfont");

        var uploadUrl = 
"www.mysite.sharepoint.com/_catalogs/theme/15/themefile.spfont";

        wc.UploadData
("www.mysite.sharepoint.com/_catalogs/theme/15/themefile.spfont", "POST", response);                       
  }

如果有人可以就我出错的地方或上传文件的替代方法给我一些建议，我会非常感激。

Answer 1

我猜您不仅需要将文件上传到SharePoint Online，还要将一个站点复制到另一个站点，对吗？

在SharePoint中有多种方法可以下载/上传文件，您可以将CSOM等特定的SharePoint API用于此目的，或者使用vanilla .NET功能（例如HttpClient Class，WebClient Class）如下所示：

var sourceWebUri = new Uri("https://sourcesite.sharepoint.com");
var targetWebUri = new Uri("https://targetsite.sharepoint.com");
var userName = "username@tenant.onmicrosoft.com";
var password = "password";

using(var sourceClient = GetClient(sourceWebUri,userName,password))
{
    var fileContent = sourceClient.DownloadData(sourceWebUri + "/documents/SharePoint User Guide.docx");
    using(var targetClient = GetClient(targetWebUri,userName,password))
    {
         targetClient.UploadData(targetWebUri + "/documents/SharePoint User Guide.docx,"PUT" ,fileContent);
    }
 }

，其中

    private static WebClient GetClient(Uri webUri, string userName, string password)
    {
        var client = new WebClient();
        client.Credentials = GetCredentials(webUri, userName, password);
        client.Headers.Add("X-FORMS_BASED_AUTH_ACCEPTED", "f");
        return client;
    }


    private static SharePointOnlineCredentials GetCredentials(Uri webUri, string userName, string password)
    {
        var securePassword = new SecureString();
        foreach (var ch in password) securePassword.AppendChar(ch);
        return new SharePointOnlineCredentials(userName, securePassword);
    }

如何通过CSOM API在SharePoint Online中的站点之间复制文件

SharePoint CSOM API包含用于从SharePoint下载文件的File.OpenBinaryDirect method和用于将文件上载到SharePoint的File.SaveBinaryDirect method，以下示例演示如何在站点之间复制文件：

public static void CopyFile(ClientContext sourceCtx, string sourceFileUrl, ClientContext targetCtx, string targetFileUrl)
{
    if (sourceCtx.HasPendingRequest)
       sourceCtx.ExecuteQuery();
    using (var fileInfo = Microsoft.SharePoint.Client.File.OpenBinaryDirect(sourceCtx, sourceFileUrl))
    {
        Microsoft.SharePoint.Client.File.SaveBinaryDirect(targetCtx, targetFileUrl, fileInfo.Stream, true);
    }
}

用法

using (var sourceCtx = GetSPOContext(sourceWebUri, userName, password))
{
     using (var targetCtx = GetSPOContext(targetWebUri, userName, password))
     {
          CopyFile(sourceCtx, "/sourcesite/documents/SharePoint User Guide.docx", targetCtx, "/targetsite/documents/SharePoint User Guide.docx");
     }
}

，其中

public static ClientContext GetSPOContext(Uri webUri, string userName, string password)
{
     var securePassword = new SecureString();
     foreach (var ch in password) securePassword.AppendChar(ch);
     return new ClientContext(webUri) { Credentials = new SharePointOnlineCredentials(userName, securePassword) };
}

先决条件

SharePointOnlineCredentials class：

表示提供访问SharePoint的凭据的对象在线资源。

是SharePoint Online Client Components SDK

的一部分

将文件从URL上传到Sharepoint

1 个答案:

如何通过CSOM API在SharePoint Online中的站点之间复制文件