从SharePoint 365下载文件

本文关键字：文件 下载 SharePoint | 更新日期: 2023-09-27 18:03:39

string remoteUri = "http://www.contoso.com/library/homepage/images/";
            string fileName = "ms-banner.gif", myStringWebResource = null;
            // Create a new WebClient instance.
            WebClient myWebClient = new WebClient();
            // Concatenate the domain with the Web resource filename.
            myStringWebResource = remoteUri + fileName;
            Console.WriteLine("Downloading File '"{0}'" from '"{1}'" .......'n'n", fileName, myStringWebResource);
            // Download the Web resource and save it into the current filesystem folder.
            myWebClient.DownloadFile(myStringWebResource,fileName);     
            Console.WriteLine("Successfully Downloaded File '"{0}'" from '"{1}'"", fileName, myStringWebResource);
            Console.WriteLine("'nDownloaded file saved in the following file system folder:'n't" + Application.StartupPath);

我正在使用来自MSDN网站的代码

但是我遇到了错误:403 forbidden

谁能帮我把这个工作

从SharePoint 365下载文件

我也面临着同样的问题，并尝试了Vadim Gremyachev建议的答案。但是，它仍然显示403错误。我添加了两个额外的头来强制基于表单的身份验证，如下所示:

client.Headers.Add("X-FORMS_BASED_AUTH_ACCEPTED", "f");
client.Headers.Add("User-Agent: Other");

之后它开始工作。完整的代码如下所示:

const string username = "username@tenant.onmicrosoft.com";
const string password = "password";
const string url = "https://tenant.sharepoint.com/";
var securedPassword = new SecureString();
foreach (var c in password.ToCharArray()) securedPassword.AppendChar(c);
var credentials = new SharePointOnlineCredentials(username, securedPassword);
DownloadFile(url,credentials,"/Shared Documents/Report.xslx");

private static void DownloadFile(string webUrl, ICredentials credentials, string fileRelativeUrl)
{
     using(var client = new WebClient())
     {
        client.Headers.Add("X-FORMS_BASED_AUTH_ACCEPTED", "f");
        client.Headers.Add("User-Agent: Other");
        client.Credentials = credentials;
        client.DownloadFile(webUrl, fileRelativeUrl);
     }  
}

由于请求未经过身份验证而发生此错误。为了访问Office/SharePoint Online中的资源，您可以利用SharePoint Server 2013客户端组件SDK中的sharepointonlinecredals类(用户凭据流)。

下面的例子演示了如何从SPO下载文件:

const string username = "username@tenant.onmicrosoft.com";
const string password = "password";
const string url = "https://tenant.sharepoint.com/";
var securedPassword = new SecureString();
foreach (var c in password.ToCharArray()) securedPassword.AppendChar(c);
var credentials = new SharePointOnlineCredentials(username, securedPassword);
DownloadFile(url,credentials,"/Shared Documents/Report.xslx");

private static void DownloadFile(string webUrl, ICredentials credentials, string fileRelativeUrl)
{
     using(var client = new WebClient())
     {
        client.Credentials = credentials;
        client.Headers.Add("X-FORMS_BASED_AUTH_ACCEPTED", "f");
        client.DownloadFile(webUrl, fileRelativeUrl);
     }  
}
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