private void txtImage_Click(object sender, EventArgs e)
{
var ofd = new OpenFileDialog();
ofd.Filter = "Image files (*.jpg, *.jpeg, *.jpe, *.jfif, *.png) | *.jpg; *.jpeg; *.jpe; *.jfif; *.png";
if (ofd.ShowDialog() == DialogResult.OK)
{
var fileName = ofd.SafeFileName.Insert(ofd.SafeFileName.IndexOf("."), DateTime.Now.ToString("yyyymmddffff"));
var buffer = File.ReadAllBytes(ofd.FileName);
var fileNameURL = _fileServiceClient.UploadFile(new Logic.Entities.ImageData()
{
FileName = fileName, FileData = buffer
});
var buttonEdit = sender as ButtonEdit;
buttonEdit.EditValue = fileNameURL;
}
}
/// <summary>
/// 文件上传
/// </summary>
/// <param name="filesPath">文件路径</param>
/// <param name="mark">标记</param>
/// <param name="cancellationToken">异步取消命令</param>
/// <returns>下载任务（是否成功、原因、成功的文件名）</returns>
public static async Task <TransferResult <List <string> > > FileUpload(FileService.FileServiceClient client, List <string> filesPath, string mark, System.Threading.CancellationToken cancellationToken = new System.Threading.CancellationToken())
{
var result = new TransferResult <List <string> > {
Message = "没有文件需要下载"
};
if (filesPath.Count == 0)
{
return(result);
}
result.Message = "未能连接到服务器";
var lstSuccFiles = new List <string>();//传输成功的文件
int chunkSize = 1024 * 1024;
byte[] buffer = new byte[chunkSize]; //每次发送的大小
FileStream fs = null; //文件流
DateTime startTime = DateTime.Now;
try
{
using (var stream = client.UploadFile())//连接上传文件的客户端
{
//reply.Block数字的含义是服务器和客户端约定的
foreach (var filePath in filesPath)
{
if (cancellationToken.IsCancellationRequested)
{
break;//取消了传输
}
FileReply reply = new FileReply()
{
FileName = Path.GetFileName(filePath),
Mark = mark
};
if (!File.Exists(filePath))
{
Console.WriteLine($"文件不存在：{filePath}");
continue;
}
fs = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.Read, chunkSize, useAsync: true);
int readTimes = 0;
while (true)
{
if (cancellationToken.IsCancellationRequested)
{
reply.Block = -1; //取消了传输
reply.Content = Google.Protobuf.ByteString.Empty;
await stream.RequestStream.WriteAsync(reply); //发送取消传输的命令
break; //取消了传输
}
int readSize = fs.Read(buffer, 0, buffer.Length);
if (readSize > 0)
{
reply.Block = ++readTimes;//更新标记，发送数据
reply.Content = Google.Protobuf.ByteString.CopyFrom(buffer, 0, readSize);
await stream.RequestStream.WriteAsync(reply);
}
else
{
Console.WriteLine($"完成文件【{filePath}】的上传。");
reply.Block = 0; //文件发送结束的标记
reply.Content = Google.Protobuf.ByteString.Empty;
await stream.RequestStream.WriteAsync(reply); //发送结束标记
//等待服务器回传
await stream.ResponseStream.MoveNext(cancellationToken);
if (stream.ResponseStream.Current != null && stream.ResponseStream.Current.Mark == mark)
{
lstSuccFiles.Add(filePath); //记录成功的文件
}
break; //发送下一个文件
}
}
fs?.Close();
}
if (cancellationToken.IsCancellationRequested)
{
fs?.Close();//释放文件流
result.IsSuccess = false;
result.Message = $"用户取消了上传文件。已完成【{lstSuccFiles.Count}/{filesPath.Count}】，耗时:{DateTime.Now - startTime}";
}
else
{
result.IsSuccess = true;
result.Message = $"完成文件上传。共计【{lstSuccFiles.Count}/{filesPath.Count}】，耗时:{DateTime.Now - startTime}";
await stream.RequestStream.WriteAsync(new FileReply
{
Block = -2, //传输结束
Mark = mark
}); //发送结束标记
}
}
}
catch (Exception ex)
{
if (!cancellationToken.IsCancellationRequested)
{
result.Message = $"文件上传发生异常({ex.GetType()})：{ex.Message}";
}
}
finally
{
fs?.Dispose();
}
Console.WriteLine(result.Message);
result.Tag = lstSuccFiles;
return(result);
}