Thread.Sleep

[JPSutor]

If you want to keep reading the value of a property (10 seconds) that
keeps changing,
how would you do it. I tried this, but it did not work


Thread th = new Thread(new ThreadStart(Rea dMe));
th.Start();
Thread.Sleep(30 00);
th.Abort();
Thread.Sleep(10 00);

[Nicholas Paldino [.NET/C# MVP]]

Re: Thread.Sleep

JPSutor,

I wouldn't use a polling mechanism like this. Rather, I would have some
sort of notification on class which indicates when the property changes.
The framework has a standard for things like this.

The first (pre .NET 2.0) is to have an event on your class named
<property name>Changed. This event is of type EventHandler, and you fire it
when the event changes.

If you are using .NET 2.0, you should use the INotifyProperty Changed
interface to indicate when a property changed (it's more efficient in
general than the old method).

If you want to poll the property, then I would use a timer, instead of
causing a thread to sleep, and check the property value there.

Hope this helps.


--
- Nicholas Paldino [.NET/C# MVP]
- mvp@spam.guard. caspershouse.co m

"JPSutor" <jpsutor@yahoo. com> wrote in message
news:1135781991 .819733.188130@ o13g2000cwo.goo glegroups.com.. .[color=blue]
> If you want to keep reading the value of a property (10 seconds) that
> keeps changing,
> how would you do it. I tried this, but it did not work
>
>
> Thread th = new Thread(new ThreadStart(Rea dMe));
> th.Start();
> Thread.Sleep(30 00);
> th.Abort();
> Thread.Sleep(10 00);
>[/color]

[MJB]

Re: Thread.Sleep


I might also add that a while loop with a sleep duration works quite
well. I noticed in pre .Net 2.0 the timer just wasn't reliable enough
in certain situations. A while loop seemed to work well as an alternate
solution.


Nicholas Paldino [.NET/C# MVP] wrote:[color=blue]
> JPSutor,
>
> I wouldn't use a polling mechanism like this. Rather, I would have some
> sort of notification on class which indicates when the property changes.
> The framework has a standard for things like this.
>
> The first (pre .NET 2.0) is to have an event on your class named
> <property name>Changed. This event is of type EventHandler, and you fire it
> when the event changes.
>
> If you are using .NET 2.0, you should use the INotifyProperty Changed
> interface to indicate when a property changed (it's more efficient in
> general than the old method).
>
> If you want to poll the property, then I would use a timer, instead of
> causing a thread to sleep, and check the property value there.
>
> Hope this helps.
>
>[/color]

[Ignacio Machin \( .NET/ C# MVP \)]

Re: Thread.Sleep

Hi,


[color=blue]
>
> Thread th = new Thread(new ThreadStart(Rea dMe));
> th.Start();
> Thread.Sleep(30 00);
> th.Abort();
> Thread.Sleep(10 00);[/color]


This does not work cause Thread.Sleep refer to the current thread , the
thread where the method is called, for this to work Thread.Sleep should be
in the ReadMe() method.
No need to call Abort btw.


ITOH, I would not do it this way, I would use a timer .

Or even better an event.




--
Ignacio Machin,
ignacio.machin AT dot.state.fl.us
Florida Department Of Transportation

[JPSutor]

Re: Thread.Sleep

Nicholas,
What I am trying to accomplish is this.
I have a form with a progress bar on it.
When I make a call to a method in another class to iterate through a
recordset, I want the progress bar to show the progress.
When I try referencing the form from my class I get an error message.
What I'm trying to do here is to set a property value and read it in
each time the timer fires. I realize this isn't the most effecient
method, but my first try did not work

[JPSutor]

Re: Thread.Sleep

Nicholas,
What I am trying to accomplish is this.
I have a form with a progress bar on it.
When I make a call to a method in another class to iterate through a
recordset, I want the progress bar to show the progress.
When I try referencing the form from my class I get an error message.
What I'm trying to do here is to set a property value and read it in
each time the timer fires. I realize this isn't the most effecient
method, but my first try did not work

[JPSutor]

Re: Thread.Sleep

Nicholas,
What I am trying to accomplish is this.
I have a form with a progress bar on it.
When I make a call to a method in another class to iterate through a
recordset, I want the progress bar to show the progress.
When I try referencing the form from my class I get an error message.
What I'm trying to do here is to set a property value and read it in
each time the timer fires. I realize this isn't the most effecient
method, but my first try did not work

[JPSutor]

Re: Thread.Sleep

Nicholas,
What I am trying to accomplish is this.
I have a form with a progress bar on it.
When I make a call to a method in another class to iterate through a
recordset, I want the progress bar to show the progress.
When I try referencing the form from my class I get an error message.
What I'm trying to do here is to set a property value and read it in
each time the timer fires. I realize this isn't the most effecient
method, but my first try did not work

[JPSutor]

Re: Thread.Sleep

Nicholas,
What I am trying to accomplish is this.
I have a form with a progress bar on it.
When I make a call to a method in another class to iterate through a
recordset, I want the progress bar to show the progress.
When I try referencing the form from my class I get an error message.
What I'm trying to do here is to set a property value and read it in
each time the timer fires. I realize this isn't the most effecient
method, but my first try did not work

[JPSutor]

Re: Thread.Sleep

Nicholas,
What I am trying to accomplish is this.
I have a form with a progress bar on it.
When I make a call to a method in another class to iterate through a
recordset, I want the progress bar to show the progress.
When I try referencing the form from my class I get an error message.
What I'm trying to do here is to set a property value and read it in
each time the timer fires. I realize this isn't the most effecient
method, but my first try did not work

[JPSutor]

Re: Thread.Sleep

Nicholas,
What I am trying to accomplish is this.
I have a form with a progress bar on it.
When I make a call to a method in another class to iterate through a
recordset, I want the progress bar to show the progress.
When I try referencing the form from my class I get an error message.
What I'm trying to do here is to set a property value and read it in
each time the timer fires. I realize this isn't the most effecient
method, but my first try did not work

[JPSutor]

Re: Thread.Sleep

Nicholas,
What I am trying to accomplish is this.
I have a form with a progress bar on it.
When I make a call to a method in another class to iterate through a
recordset, I want the progress bar to show the progress.
When I try referencing the form from my class I get an error message.
What I'm trying to do here is to set a property value and read it in
each time the timer fires. I realize this isn't the most effecient
method, but my first try did not work

[Luc Vaillant]

Re: Thread.Sleep

I suppose that the error message you've got is about thread synchronization .
If so, try this :

public class YourForm : System.Windows. Forms.Form
{
private delegate void ProgressBarDele gate(Int32 floodPercent);

public void UpdateProgressB ar(Int32 floodPercent)
{
// Need thread synchronization ?
//
if (this.InvokeReq uired)
{
this.Invoke(
new ProgressBarDele gate(this.Updat eProgressBar),
floodPercent);

return;
}

// Update ProgressBar flood percent here...
}
}

public class YourWorkingThre ad
{
private YourForm parentForm;
private DataTable dataToProceed;

YourWorkingThre ad(YourForm parentForm, DataTable dataToProceed)
{
this.parentForm = parentForm;
this.dataToProc eed = dataToProceed;
}

public void ThreadedJob()
{
Int32 rowCount = dataToProceed.R ows.Count;

for (Int32 i = 0; i < rowCount; i++)
{
// Proceed dataToProceed.R ows[i] ...

// Update progress bar
//
if (i % 100 == 0)
parentForm.Upda teProgressBar(( Int32)((Double) i / rowCount + 0.5));
}
}
}

"JPSutor" wrote:
[color=blue]
> Nicholas,
> What I am trying to accomplish is this.
> I have a form with a progress bar on it.
> When I make a call to a method in another class to iterate through a
> recordset, I want the progress bar to show the progress.
> When I try referencing the form from my class I get an error message.
> What I'm trying to do here is to set a property value and read it in
> each time the timer fires. I realize this isn't the most effecient
> method, but my first try did not work
>
>[/color]