begininvoke

c# BeginInvoke Problem

I have a program that makes some hefty calls to the database and then updates the UI. This is causing problems because for most of the time it means that the UI in not responsive. I therefore decided that I wanted to put the function calls that access the database and update the UI in a separate thread, so now I have something like thi...

Delegate.BeginInvoke Delay

Hi, Sometimes when BeginInvoke is invoked, it takes more than one second to execute the delegate method. What could be the reasons for the delay? I get this issue 1 or 2 times a day in an application which runs continuosly. Please help me. Thanks! ...

Why would InvokeRequired=False via a Delegate.BeginInvoke?

For what reasons would this.InvokeRequired equal False within InitUIState(), as this new thread is being created via a delegate? My problem is that my label is never being set and this.BeginInvoke() is never executing, I imagine it's due to the fact InvokeRequired = False. private delegate void BackgroundOperationDelegate(ViewMode ...

Assembler mov issue

Possible Duplicate: Assembler mov issue I have the next code: mov ax,@data mov ds,ax Why I can not write just like this? mov ds,@data All source: .MODEL small .STACK 100h .DATA HelloMessage DB 'Hello, world',13,10,'$' .CODE .startup mov ax,@data mov ds,ax mov ah,9 mov dx,OFFSET Hello...

Question about WPF Dispatcher.BeginInvoke called from same thread! Why?

I'm relatively new to WPF. I'm examining some code that looks like this: private void button_Click(object sender, RoutedEventArgs e) { //Queue on dispatcher in the background so it doesn't make the UI slow Dispatcher.BeginInvoke(new dMyDelegate(PerformOperation), DispatcherPriority.Background); } From the comment, I'm gue...

Passing data into a callback, is data guaranteed to be received?

Hello, my question is: having a piece of code like that (communication via callback contract) private void BroadcastMessage(DataEventArgs e) { DataEventHandler temp = DataEvent; if (temp != null) { foreach (DataEventHandler handler in temp.GetInvocationList()) { handler.BeginInvoke(this, e, EndAs...

2nd BeginInvoke call claims already completed. Why?

I'm repeatedly calling a method with BeginInvoke. After each call, I call EndInvoke. The problem is that for the second call, the IsCompleted member in the returned IAsyncResult is set to true IMMEDIATELY after the BeginInvoke call. This causes a malfunction, because the program then thinks the second call is done. Why does it do thi...

Why would ppl want to use Invoke() (not BeginInvoke())?

I was told that Invoke() is similar to normal method calling... so why would ppl choose to use Invoke and not normal method calling? I tried to search online regarding the issue, what i get is the advantages of using BeginInvoke(), but what are the advantages of using Invoke()? Thanks ...

Error on invoke when the form has closed already

I am trying to display some information on a grid queried from a sql server. The data gathering can take about 10 seconds so I don't want to lock the UI thread. I currently have code like: ThreadPool.QueueUserWorkItem(DataUpdateThread, new UpdateParams(year)); private struct UpdateParams { internal string year; internal Upd...