begininvoke

control.BeginInvoke() fails to call the delegate

会有一股神秘感。 提交于 2019-12-01 10:49:37
I noticed that control.BeginInvoke(delegate) some times fail to call the delegate. I understand that BeginInvoke just creates a PostMessage and that message is handled by the application later (post message limit by default is 10,000). Given that our application is not very complex, Is there any other reason why it can fail to execute the delegate? My code is something like below. class MyClass : Form{ private bool executing = false; private delegate void DelegateBar(string info, int total, bool status, object obj); private void Bar(string info, int total, bool status, object obj){ log(

control.BeginInvoke() fails to call the delegate

安稳与你 提交于 2019-12-01 08:48:26
问题 I noticed that control.BeginInvoke(delegate) some times fail to call the delegate. I understand that BeginInvoke just creates a PostMessage and that message is handled by the application later (post message limit by default is 10,000). Given that our application is not very complex, Is there any other reason why it can fail to execute the delegate? My code is something like below. class MyClass : Form{ private bool executing = false; private delegate void DelegateBar(string info, int total,

Why does Dispatcher.BeginInvoke unwrap TargetInvocationException for ThreadStart but not for Action?

流过昼夜 提交于 2019-12-01 06:20:44
Consider the following two applications: 1: public partial class MainWindow : Window { public MainWindow() { InitializeComponent(); this.Dispatcher.UnhandledException += Dispatcher_UnhandledException; } void Dispatcher_UnhandledException(object sender, DispatcherUnhandledExceptionEventArgs e) { System.Diagnostics.Debug.WriteLine(e.Exception.GetType()); } private void Button_Click(object sender, RoutedEventArgs e) { this.Dispatcher.BeginInvoke((ThreadStart)delegate { throw new AccessViolationException("test"); }, DispatcherPriority.Input); } } 2: public partial class MainWindow : Window {

Why does Dispatcher.BeginInvoke unwrap TargetInvocationException for ThreadStart but not for Action?

蹲街弑〆低调 提交于 2019-12-01 05:15:32
问题 Consider the following two applications: 1: public partial class MainWindow : Window { public MainWindow() { InitializeComponent(); this.Dispatcher.UnhandledException += Dispatcher_UnhandledException; } void Dispatcher_UnhandledException(object sender, DispatcherUnhandledExceptionEventArgs e) { System.Diagnostics.Debug.WriteLine(e.Exception.GetType()); } private void Button_Click(object sender, RoutedEventArgs e) { this.Dispatcher.BeginInvoke((ThreadStart)delegate { throw new

Windows Phone: how to tell when Deployment.Current.Dispatcher.BeginInvoke has completed?

懵懂的女人 提交于 2019-11-30 23:53:27
I'm trying to make the UI of a page in a WP7 application more responsive by putting the data loading portion into a background thread rather than running in the foreground when the page loads. The thread code essentially works through some data and adds items to an observable collection; in order to avoid exception issues, I execute something like: Deployment.Current.Dispatcher.BeginInvoke(() => { _events.Add(_newItem); }); so that the addition of the item to the collection is done in the UI thread. The problem I'm now hitting is that a subsequent part of the code needs to perform a foreach on

Does BeginInvoke() run a separate thread?

时光怂恿深爱的人放手 提交于 2019-11-30 13:03:59
In my WPF application, I want to do some work in a non-UI thread so as to avoid the UI from become not-responding. For that I did this: var caller = new AsyncMethodCaller<Pattern>(this.SetPatternType); caller.BeginInvoke(_patterns, null, null); And the delegate is defined as, public delegate void AsyncMethodCaller<in T>(IEnumerable<T> data); My question is: Does BeginInvoke() create a new thread and the callback SetPatternType runs in it? If so, how long this thread last? Is this approach good in general? If not, what is wrong with it? And what potential problem(s) might I face? I'm using C# 4

Anonymous method as parameter to BeginInvoke?

烈酒焚心 提交于 2019-11-30 06:45:40
Why can't you pass an anonymous method as a parameter to the BeginInvoke method? I have the following code: private delegate void CfgMnMnuDlg(DIServer svr); private void ConfigureMainMenu(DIServer server,) { MenuStrip mnMnu = PresenterView.MainMenu; if (mnMnu.InvokeRequired) { mnMnu.BeginInvoke((CfgMnMnuDlg)ConfigureMainMenu, new object[] { server}); } else { // Do actual work here } } I'm trying to avoid declaring the delegate. Why can't I write something like the below instead? Or can I, and I just can't figure out the correct syntax? The below currently generates an: Argument type

Invoke and BeginInvoke

左心房为你撑大大i 提交于 2019-11-30 04:53:12
Greetings, I am developing some application in C#. At the moment I'm dealing with threading and I have a question that I have in my mind. What is the difference between Invoke and BeginInvoke? I read some thread and I found some useful information here: here However what is the difference between Invoke and BeginInvoke in the following code: private void ProcessRoutine() { for (int nValue = StartFrom; nValue <= EndTo; nValue++) { this.Invoke(this.MyDelegate, nValue); //this.BeginInvoke(this.MyDelegate, nValue); } MessageBox.Show("Counting complete!"); } private void MessageHandler(int progress

Does BeginInvoke() run a separate thread?

旧城冷巷雨未停 提交于 2019-11-29 18:29:51
问题 In my WPF application, I want to do some work in a non-UI thread so as to avoid the UI from become not-responding. For that I did this: var caller = new AsyncMethodCaller<Pattern>(this.SetPatternType); caller.BeginInvoke(_patterns, null, null); And the delegate is defined as, public delegate void AsyncMethodCaller<in T>(IEnumerable<T> data); My question is: Does BeginInvoke() create a new thread and the callback SetPatternType runs in it? If so, how long this thread last? Is this approach

beginInvoke, GUI and thread

天大地大妈咪最大 提交于 2019-11-29 10:36:43
I have application with two thread. One of them (T1) is main GUI form, another (T2) is function working in loop. When T2 gets some information must call function with GUI form. I'm not sure that I do it right. T2 call function FUNCTION, which update something in GUI form. public void f() { // controler.doSomething(); } public void FUNCTION() { MethodInvoker method = delegate { f(); }; if ( InvokeRequired ) { BeginInvoke( method ); } else { f(); } } But now I must declare two function. How does it using only one function? Or how does it right. You can do this in a single method by calling