// 上传进度改变时触发
protected override void OnUploadProgressChanged(object sender, BeSl.Controls.File.Upload.UploadProgressChangedEventArgs args)
{
base.OnUploadProgressChanged(sender, args);
progressBar.Value = TotalUploadedSize;
totalSizeTextBlock.Text = string.Format("{0} / {1}",
new ByteConverter().Convert(TotalUploadedSize, this.GetType(), null, null).ToString(),
new ByteConverter().Convert(TotalUploadingSize, this.GetType(), null, null).ToString());
}
// 上传进度改变时触发
protected virtual void OnUploadProgressChanged(object sender, BeSl.Controls.File.Upload.UploadProgressChangedEventArgs args)
{
TotalUploadedSize += args.BytesUploaded;
double ByteProcessTime = 0;
double EstimatedTime = 0;
try
{
TimeSpan timeSpan = DateTime.Now - m_startTime;
ByteProcessTime = TotalUploadedSize / timeSpan.TotalSeconds;
EstimatedTime = (TotalUploadingSize - TotalUploadedSize) / ByteProcessTime;
timeSpan = TimeSpan.FromSeconds(EstimatedTime);
timeLeftTextBlock.Text = string.Format("{0:00}:{1:00}:{2:00}", timeSpan.Hours, timeSpan.Minutes, timeSpan.Seconds);
}
catch { }
}
// 一次文件上传操作（由于服务器对每次请求的文件大小一般有限制，因此大文件上传时，根据ChunkSize进行分批上传）
private void FileUpload_WriteCallback(IAsyncResult asynchronousResult)
{
HttpWebRequest webrequest = asynchronousResult.AsyncState as HttpWebRequest;
// 结束操作
Stream requestStream = webrequest.EndGetRequestStream(asynchronousResult);
byte[] buffer = new Byte[4096];
int bytesRead = 0;
int tempTotal = 0;
Stream fileStream = ((m_resizeStream != null) ? (Stream)m_resizeStream : File.OpenRead());
fileStream.Position = BytesUploaded;
while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0 && tempTotal + bytesRead < ChunkSize && !m_cancel)
{
requestStream.Write(buffer, 0, bytesRead);
requestStream.Flush();
BytesUploaded += bytesRead;
tempTotal += bytesRead;
if (UploadProgressChanged != null)
{
int percent = (int)(((double)BytesUploaded / (double)FileLength) * 100);
UploadProgressChangedEventArgs args = new UploadProgressChangedEventArgs(percent, bytesRead, BytesUploaded, FileLength, m_file.Name);
this.Dispatcher.BeginInvoke(delegate()
{
UploadProgressChanged(this, args);
});
}
}
// 只关闭文件流，不关闭图片调整流，一面第二次上传时再次对文件作调整
if (m_resizeStream == null)
{
fileStream.Close();
}
requestStream.Close();
webrequest.BeginGetResponse(new AsyncCallback(FileUpload_ReadCallback), webrequest);
//webrequest.GetResponse
}