DotNetZip 取消任务中的提取
DotNetZip Cancel extraction in Task
我有一个在任务中执行 zip 解压缩的方法。现在我想要取消操作的能力。但是当我调用 Cancel()
方法时,一切似乎都立即停止并且 while
永远运行:
public class OsiSourceZip
{
private const string ZipPassword = "******";
private bool _extractionDone;
private bool _cancelExtraction;
public async Task Extract(string sourceFile, string extractionDir)
{
Task extraction = Task.Run(() =>
{
using (ZipFile zipf = ZipFile.Read(sourceFile))
{
zipf.ExtractProgress += delegate(object sender, ExtractProgressEventArgs args)
{
args.Cancel = _cancelExtraction;
RaiseExtractionProgressUpdate(args);
};
zipf.Password = ZipPassword;
zipf.Encryption = EncryptionAlgorithm.WinZipAes256;
zipf.ExtractExistingFile = ExtractExistingFileAction.OverwriteSilently;
zipf.ExtractAll(extractionDir);
}
});
await extraction;
_extractionDone = true;
RaiseSourceInstallationCompleted();
}
public void Cancel()
{
_cancelExtraction = true;
while (!_extractionDone)
{
Thread.Sleep(500);
}
}
}
我已经在 args.Cancel = _cancelExtraction;
上设置了一个断点,但是一旦 Cancel()
方法被调用,事件就不再触发了。
我找到了解决方法。我基本上摆脱了我自己的 Cancel
方法,并按照 dotnetzip 框架的要求进行操作。在进度事件中。
假设您想在 Form
关闭时取消操作。我捕获 FormClosing
事件,取消关闭过程并记住关闭请求。下次进度事件触发时,我在事件参数中设置 cancel
属性 并在 completed
事件中自己关闭 Form
事件:
public partial class MainForm : Form
{
private bool _closeRequested;
private void OnSourceInstallationCompleted(object sender, EventArgs e)
{
if (_closeRequested) { this.Close(); }
}
private void MainForm_FormClosing(object sender, FormClosingEventArgs e)
{
if (!_closeRequested)
{
_closeRequested = true;
e.Cancel = true;
}
}
private void OnExtractionProgressUpdate(object sender, ExtractProgressEventArgs e)
{
e.Cancel = _closeRequested;
}
}
我觉得它很丑,但它确实有效....
我有一个在任务中执行 zip 解压缩的方法。现在我想要取消操作的能力。但是当我调用 Cancel()
方法时,一切似乎都立即停止并且 while
永远运行:
public class OsiSourceZip
{
private const string ZipPassword = "******";
private bool _extractionDone;
private bool _cancelExtraction;
public async Task Extract(string sourceFile, string extractionDir)
{
Task extraction = Task.Run(() =>
{
using (ZipFile zipf = ZipFile.Read(sourceFile))
{
zipf.ExtractProgress += delegate(object sender, ExtractProgressEventArgs args)
{
args.Cancel = _cancelExtraction;
RaiseExtractionProgressUpdate(args);
};
zipf.Password = ZipPassword;
zipf.Encryption = EncryptionAlgorithm.WinZipAes256;
zipf.ExtractExistingFile = ExtractExistingFileAction.OverwriteSilently;
zipf.ExtractAll(extractionDir);
}
});
await extraction;
_extractionDone = true;
RaiseSourceInstallationCompleted();
}
public void Cancel()
{
_cancelExtraction = true;
while (!_extractionDone)
{
Thread.Sleep(500);
}
}
}
我已经在 args.Cancel = _cancelExtraction;
上设置了一个断点,但是一旦 Cancel()
方法被调用,事件就不再触发了。
我找到了解决方法。我基本上摆脱了我自己的 Cancel
方法,并按照 dotnetzip 框架的要求进行操作。在进度事件中。
假设您想在 Form
关闭时取消操作。我捕获 FormClosing
事件,取消关闭过程并记住关闭请求。下次进度事件触发时,我在事件参数中设置 cancel
属性 并在 completed
事件中自己关闭 Form
事件:
public partial class MainForm : Form
{
private bool _closeRequested;
private void OnSourceInstallationCompleted(object sender, EventArgs e)
{
if (_closeRequested) { this.Close(); }
}
private void MainForm_FormClosing(object sender, FormClosingEventArgs e)
{
if (!_closeRequested)
{
_closeRequested = true;
e.Cancel = true;
}
}
private void OnExtractionProgressUpdate(object sender, ExtractProgressEventArgs e)
{
e.Cancel = _closeRequested;
}
}
我觉得它很丑,但它确实有效....