why in the a event,For example label1.Text should wait for to ended the event to update UI

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if possible,Determined what sendMesssage,postmessage,messaege pomp,message queue in the my code .too why "label1.Text = "Csharp"; must be wait to envent to be ended.

public partial class Form1 : Form
  {
      public Form1()
      {
          InitializeComponent();
      }

      private void button1_Click(object sender, EventArgs e)
      {

          y();
          label1.Text = "Csharp";
          ThreadStart p=new ThreadStart(x);
          Thread g=new Thread(p);
          g.Start();
          y();

      }



      void y()
      {
          label2.Text = "mehdi";

      }

      void x()
      {
          label2.Text = "mehdi";
          Thread.Sleep(100);

      }
  }

Posted 9-Feb-11 12:05pm

User 7427435

Updated 9-Feb-11 12:06pm

v2

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Manfred Rudolf Bihy 9-Feb-11 18:26pm

Are you trying to drive us crazy? You've posted enough questions on this and also received a lot of sufficient answers concerning GUI updates from a thread different from GUI thread.

Besides that you should reconsider your formulation of this question as it is absolutely unintelligible.

Sorry!

Ali Al Omairi(Abu AlHassan) 9-Feb-11 18:40pm

Sir, be easy with him. he's just a student.

Sergey Alexandrovich Kryukov 9-Feb-11 18:45pm

Well, amazingly bad student. Did you read all the post on the topic? All the Answers? Did you see the cases when Mehdi did directly opposite to what was advised and asked why it still hanging? Then do it first, and after that decide who you want to be nice to.

He must be just a bit more easy with us. And by the way, in my time students were expelled and went to serve as soldiers at the end of the term. Three failure during the same session and you're good to go. Quite fair for a free-of-charge services!

--SA

Manfred Rudolf Bihy 9-Feb-11 18:51pm

I think we were really patient sofar, but OP keeps on coming back with questions on the same subject. It almost seems that the advice OP was given before does not have any effect. I'll try to keep my patience because I still can remember how hard it is for a beginner. :)

Sergey Alexandrovich Kryukov 9-Feb-11 19:01pm

Agreed, but my answers are still real and constructive and not just rants. Not to demand nice or at least more considerate behavior though would be plain stupid.

Look at this answer: http://www.codeproject.com/Questions/153936/why-in-Monitor-Wait-Using-of-lock-object.aspx.

Not very simple, right?

Now, in next question, OP put the code following this pattern (very hard-to-explain effect of combination of lock and invoke) and asked why it hang. I answered again. 21 Questions with coming back to wrong things, ignoring advice, but with more and more "hi-tech" detail contributing to the mess.

--SA

Ali Al Omairi(Abu AlHassan) 9-Feb-11 19:42pm

you know, man. when i was a student i was working hard but in a closed circle being no body helping me. se i found my own way by trying again and again.
this maight be the reason why i beleve that every student has the right to get the help he need. (but in his case you can just cut off head.)

100 :rose: ;)

Manfred Rudolf Bihy 9-Feb-11 19:48pm

Lets not give up on OP yet! He'll come along eventually and grow. So let us keep are patience for a little bit longer. Cheers!

Ali Al Omairi(Abu AlHassan) 9-Feb-11 19:51pm

Over my head, Sir.

Sergey Alexandrovich Kryukov 9-Feb-11 18:42pm

Manfred, is it a time to delete all the Questions by OP without explanation?
I'm almost ready.

(See my most recent answer on this page.)
Did you look for all the answers, especially mine? There are cases when I explained in what case things would hang, OP implemented it precisely to that recipe to hang it (which actually would take some skills) and ask why it's hanging.
I starting to think this is such a think trolling. Maybe Mehdi having fun out of it? (In this case, me respect!)

--SA

Manfred Rudolf Bihy 9-Feb-11 18:54pm

I don't think deleting OP's questions is the solution here. Troll or not though I'm a bit uncertain in that. :)

Sergey Alexandrovich Kryukov 9-Feb-11 20:31pm

Agree. As I say, if it was trolling, my respect. I bought it!
I already gave up dealing with OP, but later was involved again.
--SA

Ali Al Omairi(Abu AlHassan) 9-Feb-11 18:36pm

Sorry, I didn't under stand your question but i thing your problem is that your form is getting frozen until the end of 'button1_Click' method.

In this case you should use a callback delegate to modify the property within the same thread.

Sergey Alexandrovich Kryukov 9-Feb-11 18:52pm

Mehdi, be a little bit considerate. Please, spell check, capitalize all properly, use full punctuation, make sure people can understand you. I have a feeling I do more of your job than you do, nevertheless, I right to you clearly. English in not my native as well. This is because I'm polite and nice to you, and I would say you're not.
--SA

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Sergey Alexandrovich Kryukov · Answer 1 · 2011-02-09T12:37:00

I mentioned to you many times: stop creating threads in the middle of your UI. This way you can spawn any number of threads, one per click. Why?

Create a permanent thread from the very beginning and feed tasks to it. You don't need more then one, right. Hold idle thread with EventWaitHandle, for example, or use blocking queue. I recommended it many times, see this: Simple Blocking Queue for Thread Communication and Inter-thread Invocation[^]. Alternatively, take a thread from the thread poll, but again, don't do it on every click.

Now button1_Click violates all possible Microsoft naming conventions. Don't tell me it generated by Microsoft's designer. Yes, but you're not a robot to repeat it! Use anonymous delegate, grow up.

This is all a foreword, now a word:

You're call x() in no-UI thread. It means you should not use UI operation label2.Text = "mehdi";. You need to Invoke it. A call to y() in your call is valid.

—SA