最新内容优先发布于个人博客:小虎技术分享站,随后逐步搬运到博客园。
创作不易,如果觉得有用请在Github上为博主点亮一颗小星星吧!
目的
早两天写了一篇S3简单上传文件的小工具,知乎上看到了一个问题问如何实现显示MINIO上传进度,因此拓展一下这个小工具能够在上传大文件时显示进度。
完整代码托管于Github:mrchipset/simple-wpf
实现方式
- 先通过
Xaml
编写一个包含上传进度条的小界面。具体内容就不赘述了,可以参考这篇文章 - 为了得到上传进度就不能再简单地使用
PutObjectRequest
进行上传需要使用S3中TransferUtility
提供的高等级API进行上传。 - 然后创建一个
TransferUtilityUploadRequest
对象并绑定其UploadProgressEvent
事件以实现上传进度的监控
具体的实现代码如下:
private async Task<bool> UploadLargeFileAsync()
{
var credentials = new BasicAWSCredentials(_accessKey, _secretKey);
var clientConfig = new AmazonS3Config
{
ForcePathStyle = true,
ServiceURL = _endpoint,
};
bool ret = true;
using (var client = new AmazonS3Client(credentials, clientConfig))
{
try
{
var fileTransferUtility = new TransferUtility(client);
var uploadRequest = new TransferUtilityUploadRequest
{
BucketName = LargeBucket,
FilePath = UploadLargeFile,
Key = System.IO.Path.GetFileName(UploadLargeFile)
};
uploadRequest.UploadProgressEvent += UploadRequest_UploadProgressEvent;
await fileTransferUtility.UploadAsync(uploadRequest);
}
catch (FileNotFoundException e)
{
ret = false;
this.Dispatcher.Invoke(new Action(() => this.statusLargeTxtBlk.Text = e.Message));
}
catch (AmazonS3Exception e)
{
ret = false;
if (e.ErrorCode != null &&
(e.ErrorCode.Equals("InvalidAccessKeyId") ||
e.ErrorCode.Equals("InvalidSecurity")))
{
this.Dispatcher.Invoke(new Action(() => this.statusLargeTxtBlk.Text = "Please check the provided AWS Credentials"));
}
else
{
this.Dispatcher.Invoke(new Action(() => this.statusLargeTxtBlk.Text = $"An error occurred with the message '{e.Message}' when writing an object"));
}
}
catch(Exception e)
{
this.Dispatcher.Invoke(new Action(() => this.statusLargeTxtBlk.Text = $"An error occurred with the message '{e.Message}' when writing an object"));
}
}
return ret;
}
private void UploadRequest_UploadProgressEvent(object? sender, UploadProgressArgs e)
{
this.Dispatcher.Invoke((Action)(() =>
{
this.uploadProgress.Value = e.TransferredBytes * 100 / e.TotalBytes ;
}));
}
值得一提的时,在上传进度的事件处理函数中,由于我们通过异步方法执行上传函数,因此我们需要使用Dispatcher
来更新数据到UI
上。
演示效果
参考连接
https://docs.aws.amazon.com/AmazonS3/latest/userguide/mpu-upload-object.html
https://www.xtigerkin.com/archives/96/
标签:MINIO,Invoke,Simple,var,Action,new,上传,Dispatcher From: https://www.cnblogs.com/mrchip/p/18297187