Question

我正在将文件上传到 S3 。但是文件上传无声地失败而没有任何错误。所以我编写了一个事件处理程序来跟踪上传。

以下是我的文件上传功能。

我想等待事件处理程序，直到它完成执行。请注意它是同步文件上传。

public async Task<ActionResult> UploadBatchDocuments(UploadViewModel model)
{
    TransferUtility transfer = new TransferUtility(client);

    foreach (var file in model.Documents)
    {
        TransferUtilityUploadRequest request = new TransferUtilityUploadRequest()
        {
            BucketName = bucketName,
            CannedACL = S3CannedACL.PublicRead,
            Key = string.Format(file.FilePath + "/{0}", fileName),
            InputStream = file.File.InputStream,
        };
      await Task.Run(()=>request.UploadProgressEvent += uploadRequest_UploadPartProgressEvent);
        await Task.Run(() => transfer.Upload(request));
    }
}

下面是我为每个文件上传运行的事件处理程序，

public async void uploadRequest_UploadPartProgressEvent(object sender, UploadProgressArgs e)
{
    if (e.PercentDone == 100)
    {
        var subs = ((Amazon.S3.Transfer.TransferUtilityUploadRequest)sender).Key.Split('/');
        var fileName = subs[subs.Length - 1];

        for (int i = 0; i < tempModel.Documents.Count; i++)
        {
            if (tempModel.Documents[i].File.FileName.Equals(fileName))
            {
                tempModel.Documents[i].isUploaded = true;
            }
        }
    }
}

我的问题是：控件不断在UploadBatchDocuments和uploadRequest_UploadPartProgressEvent（这是一个事件处理程序）之间切换。必需：我希望控件在UploadBatchDocuments中等待等待线程在uploadRequest_UploadPartProgressEvent中完成

等待单个线程的事件处理程序执行

0 个答案: