[英]Dispatcher.beginInvoke not executing immediately
到目前为止,下面是我的代码,调用Dispatcher.BeginInvoke时出现问题,它无法在正确的时间处理这些消息
类脚本:
public void Execute()
{
var process = new Process();
var startinfo = new ProcessStartInfo("cmd.exe", @"/C c:\test\my.bat");
startinfo.WorkingDirectory = "c:\\test";
startinfo.RedirectStandardOutput = true;
startinfo.RedirectStandardError = true;
startinfo.UseShellExecute = false;
startinfo.CreateNoWindow = true;
process.EnableRaisingEvents = true;
process.StartInfo = startinfo;
process.OutputDataReceived += (sender, args) => OutputDataReceived(args.Data);
process.ErrorDataReceived += (sender, args) => ErrorDataReceived(args.Data);
process.Exited += Exited;
process.Start();
process.BeginOutputReadLine();
process.BeginErrorReadLine();
process.WaitForExit();
int exitCode = process.ExitCode;
}
public void OutputDataReceived(string data)
{
Logging.Logger.Log("data received in script - " + data);
// throw event if we have a subscriber, else just return
if (OnScriptOutPut == null) return;
allFormattedOutPut += Environment.NewLine;
allFormattedOutPut += data;
allRawOutPut += data;
ScriptOutputEventArgs args = new ScriptOutputEventArgs(data);
OnScriptOutPut(this, args);
}
WPF窗口调用脚本类并订阅OnScriptOutPut事件
问题出在下面,仅在脚本完成后才调用UpdateOutPutTextBox,然后全部一次处理所有updateoutputtextbox消息,当调用begininvoke导致屏幕在末尾而不是在新输出时进行更新时,不会更新它们。数据已接收..任何帮助表示赞赏!
private void btnRunScript_Click(object sender, RoutedEventArgs e)
{
Script script = new Script();
script.OnScriptOutPut += script_OnScriptOutPut;
script.Execute();
}
private void script_OnScriptOutPut(object sender, ScriptOutputEventArgs args)
{
Application.Current.Dispatcher.BeginInvoke(new Action(() => UpdateOutPutTextBox(args.Data)),System.Windows.Threading.DispatcherPriority.Send);
Logging.Logger.Log("data received in event ");
}
private void UpdateOutPutTextBox(string data)
{
Logging.Logger.Log("data received in update "+data);
tbOutput.Text += Environment.NewLine;
tbOutput.Text += data;
}
我无法遍历整个代码,但是查询查询Dispatcher.BeginInvoke BeginInvoke->就像调用async一样,异步操作可能需要一些时间,具体取决于条件,如果可以的话,请使用Invoke代替,您的代码很多! 尽可能重用它!
您正在UI线程上调用Execute
,并使用WaitForExit
阻止该线程。 然后,所有BeginInvoke
操作都被排队。 删除对WaitForExit
的调用。 如果您需要对退出代码进行操作,请在Exited
事件处理程序中获取该值。
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