[英]Dispatcher.beginInvoke not executing immediately
到目前為止,下面是我的代碼,調用Dispatcher.BeginInvoke時出現問題,它無法在正確的時間處理這些消息
類腳本:
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窗口調用腳本類並訂閱OnScriptOutPut事件
問題出在下面,僅在腳本完成后才調用UpdateOutPutTextBox,然后全部一次處理所有updateoutputtextbox消息,當調用begininvoke導致屏幕在末尾而不是在新輸出時進行更新時,不會更新它們。數據已接收..任何幫助表示贊賞!
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;
}
我無法遍歷整個代碼,但是查詢查詢Dispatcher.BeginInvoke BeginInvoke->就像調用async一樣,異步操作可能需要一些時間,具體取決於條件,如果可以的話,請使用Invoke代替,您的代碼很多! 盡可能重用它!
您正在UI線程上調用Execute
,並使用WaitForExit
阻止該線程。 然后,所有BeginInvoke
操作都被排隊。 刪除對WaitForExit
的調用。 如果您需要對退出代碼進行操作,請在Exited
事件處理程序中獲取該值。
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