[开发测试]MSGraphMailbag - 使用 Microsoft Graph SDK 的 LargeFileUploadTask 上传大文件

本篇，我们将介绍使用 Microsoft Graph SDK 的 LargeFileUploadTask 来上传大文件 (大于 4M 的文件)。

随着 Microsoft Graph SKD 的更新，ChunkedUploadProvider 已经过时了，当前可以使用 LargeFileUploadTask 来上传大文件。示例代码如下：

using (var fileStream = System.IO.File.OpenRead(filePath))
{
    // Use properties to specify the conflict behavior
    // in this case, replace
    var uploadProps = new DriveItemUploadableProperties
    {
        ODataType = null,
        AdditionalData = new Dictionary<string, object>
        {
            { "@microsoft.graph.conflictBehavior", "replace" }
        }
    };

    // Create the upload session
    // itemPath does not need to be a path to an existing item
    var uploadSession = await graphClient.Me.Drive.Root
        .ItemWithPath(itemPath)
        .CreateUploadSession(uploadProps)
        .Request()
        .PostAsync();

    // Max slice size must be a multiple of 320 KiB
    int maxSliceSize = 320 * 1024;
    var fileUploadTask =
        new LargeFileUploadTask<DriveItem>(uploadSession, fileStream, maxSliceSize);

    // Create a callback that is invoked after each slice is uploaded
    IProgress<long> progress = new Progress<long>(prog => {
        Console.WriteLine($"Uploaded {prog} bytes of {fileStream.Length} bytes");
    });

    try
    {
        // Upload the file
        var uploadResult = await fileUploadTask.UploadAsync(progress);

        if (uploadResult.UploadSucceeded)
        {
            // The ItemResponse object in the result represents the
            // created item.
            Console.WriteLine($"Upload complete, item ID: {uploadResult.ItemResponse.Id}");
        }
        else
        {
            Console.WriteLine("Upload failed");
        }
    }
    catch (ServiceException ex)
    {
        Console.WriteLine($"Error uploading: {ex.ToString()}");
    }
}

更多信息可参阅 Microsoft Docs文档
Upload large files using the Microsoft Graph SDKs