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[英]How to pass BitmapImage reference to BackgroundWorker.DoWork
[英]how to cancel DoWork in Backgroundworker
我知道這不是關於取消BackGroundWorker的第一個問題,但我找不到解決問題的答案。
我有一個發送文件的方法..我使用backgroundworker來調用它..
那么如何在發送文件的過程中取消后台工作者...我的意思是我應該放在哪里
if (backgroundWorker1.CancellationPending == true)
{
e.Cancel = true;
break;
}
這是代碼:
private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
{
List<object> job = (List<object>)e.Argument;
string srcPath = (string)job[0];
string destPath = (string)job[1];
SendFile(srcPath, destPath);
}
發送方式:
private void SendFile(string srcPath, string destPath)
{
string dest = Path.Combine(destPath, Path.GetFileName(srcPath));
using (fs = new FileStream(srcPath, FileMode.Open, FileAccess.Read))
{
try
{
long fileSize = fs.Length;
if (sizeAll == 0)
sizeAll = fileSize;
sum = 0;
int count = 0;
data = new byte[packetSize];
SendCommand("receive<" + dest + "<" + fs.Length.ToString());
ProgressLabel(++fileCount, allFileCount);
InfoLabel("Sending " + srcPath, "busy");
while (sum < fileSize)
{
count = fs.Read(data, 0, data.Length);
network.Write(data, 0, count);
sum += count;
sumAll += count;
backgroundWorker1.ReportProgress((int)((sum * 100) / fileSize));
}
network.Flush();
}
finally
{
network.Read(new byte[1], 0, 1);
CloseTransfer();
}
}
}
我應該在send方法的while()循環中檢查CancellationPending ..但是我不能從這個方法到[background.de]的背景工作者...我該怎么辦?
DoWorkEventArgs e可以作為SendFile中的第三個參數傳遞:
private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
{
List<object> job = (List<object>)e.Argument;
string srcPath = (string)job[0];
string destPath = (string)job[1];
SendFile(srcPath, destPath, e);
}
然后SendFile會
private void SendFile(string srcPath, string destPath, DoWorkEventArgs e)
在ReportProgress之后的循環中
if (backgroundWorker1.CancellationPending == true)
{
e.Cancel = true;
return; // this will fall to the finally and close everything
}
把它放在你的while
循環中:
while (sum < fileSize)
{
if (worker.CancellationPending)
{
e.Cancel = true;
break;
}
count = fs.Read(data, 0, data.Length);
network.Write(data, 0, count);
sum += count;
sumAll += count;
backgroundWorker1.ReportProgress((int)((sum * 100) / fileSize));
}
network.Flush();
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