从 OneDrive 下载文件时返回值为 null [英] Returned value is null when downloading a file from OneDrive

问题描述

正如文档中所说，我尝试下载文件方式:

As it is said in the documentation, I try to download a file way:

try
{
    LiveDownloadOperation operation = await connectClient.CreateBackgroundDownloadAsync(filePath);
    var result = await operation.StartAsync();
    var file = result.File; // It is null

}
catch
{
    // Handle errors.
}

但是 result.File 为空.我认为我的文件路径有问题，如下所示:

But result.File is null. I think something is wrong with my file path, which is like this:

path = "file.8c8ce076ca27823f.8C8CE076CA27823F!129"

也试过:path = "file.8c8ce076ca27823f.8C8CE076CA27823F!129/content"

怎么了?它是一个 Windows 运行时应用程序，使用 LiveSDK 5.6

推荐答案

要读取文件内容，使用文件 ID +/content 然后访问流.

To read the file content, use the file ID + /content and then access the stream.

示例:

LiveConnectClient liveClient = new LiveConnectClient(liveSession);
LiveDownloadOperation operation = 
         await liveClient.CreateBackgroundDownloadAsync(fileId + "/content");
var operationResult = await operation.StartAsync();

var fileContent = 
         await CustomMethod(await operationResult.GetRandomAccessStreamAsync());

return fileContent;

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