writing files in the Tick events when each write takes longer than the interval

[AAaron123]

I have a timer. At each tick, say 0.1 second, I write a file.

If it takes more than 0.1 second to write the file the app will not work
correctly.

How can I tell in the tick event if the previous file finished writing so I
can skip writing at that time?

I write using the Bitmap.Save method.

Maybe I could Open, Write, Close synchronously??

Any ideas?




What happens if the Click event takes more that 0.3 seconds to exit.

Do the click events pile up and then come right after each other or are the
past ones simply missed?


Thanks

[rowe_newsgroups]

Re: writing files in the Tick events when each write takes longerthan the interval

On Aug 1, 9:33 am, "AAaron123" <aaaron...@road runner.comwrote :

I have a timer. At each tick, say 0.1 second, I write a file.
>
If it takes more than 0.1 second to write the file the app will not work
correctly.
>
How can I tell in the tick event if the previous file finished writing soI
can skip writing at that time?
>
I write using the Bitmap.Save method.
>
Maybe I could Open, Write, Close synchronously??
>
Any ideas?
>
What happens if  the Click event takes more that 0.3 seconds to exit.
>
Do the click events pile up and then come right after each other or are the
past ones simply missed?
>
Thanks

You need to find a solution that doesn't rely on time, otherwise you
will spend the rest of the project's life debugging race conditions.

Is it possible to use a message queue to track the writes? The tick
event would write to the queue, and then the the changes could be
written out from the queue asynchronously.

Also, why not just keep the bitmap in memory and write it to a file
when the changes are done?

Thanks,

Seth Rowe [MVP]

http://sethrowe.blogspot.com/

[Gillard]

Re: writing files in the Tick events when each write takes longer than the interval

what about thread?

"AAaron123" <aaaron123@road runner.comwrote in message
news:e0KAws98IH A.5700@TK2MSFTN GP02.phx.gbl...

I have a timer. At each tick, say 0.1 second, I write a file.
>
If it takes more than 0.1 second to write the file the app will not work
correctly.
>
How can I tell in the tick event if the previous file finished writing so
I can skip writing at that time?
>
I write using the Bitmap.Save method.
>
Maybe I could Open, Write, Close synchronously??
>
Any ideas?
>
>
>
>
What happens if the Click event takes more that 0.3 seconds to exit.
>
Do the click events pile up and then come right after each other or are
the past ones simply missed?
>
>
Thanks
>
>
>
>

[Cor Ligthert[MVP]]

Re: writing files in the Tick events when each write takes longer than the interval

Aaron,

Why not do the writing of the file assynchronous in a backgroundworke r.

The queue class will be a greath class to fullfil that.

Cor

"AAaron123" <aaaron123@road runner.comschre ef in bericht
news:e0KAws98IH A.5700@TK2MSFTN GP02.phx.gbl...

>I have a timer. At each tick, say 0.1 second, I write a file.
>
If it takes more than 0.1 second to write the file the app will not work
correctly.
>
How can I tell in the tick event if the previous file finished writing so
I can skip writing at that time?
>
I write using the Bitmap.Save method.
>
Maybe I could Open, Write, Close synchronously??
>
Any ideas?
>
>
>
>
What happens if the Click event takes more that 0.3 seconds to exit.
>
Do the click events pile up and then come right after each other or are
the past ones simply missed?
>
>
Thanks
>
>
>
>

[AAaron123]

Re: writing files in the Tick events when each write takes longer than the interval

Use a thread to write and check to see if the thread is still active??

Is that what you mean?


I'd have to learn how to do that but that would be a plus!

Thanks

"Gillard" <gillard_george s@@@@@@@@@hotma il.comwrote in message
news:%23m43hz98 IHA.5404@TK2MSF TNGP04.phx.gbl. ..

what about thread?
>
"AAaron123" <aaaron123@road runner.comwrote in message
news:e0KAws98IH A.5700@TK2MSFTN GP02.phx.gbl...

>I have a timer. At each tick, say 0.1 second, I write a file.
>>
>If it takes more than 0.1 second to write the file the app will not work
>correctly.
>>
>How can I tell in the tick event if the previous file finished writing so
>I can skip writing at that time?
>>
>I write using the Bitmap.Save method.
>>
>Maybe I could Open, Write, Close synchronously??
>>
>Any ideas?
>>
>>
>>
>>
>What happens if the Click event takes more that 0.3 seconds to exit.
>>
>Do the click events pile up and then come right after each other or are
>the past ones simply missed?
>>
>>
>Thanks
>>
>>
>>
>>

[Gillard]

Re: writing files in the Tick events when each write takes longer than the interval

do you write new image or it is the same image??

"AAaron123" <aaaron123@road runner.comwrote in message
news:#6OGr198IH A.1204@TK2MSFTN GP04.phx.gbl...

Use a thread to write and check to see if the thread is still active??
>
Is that what you mean?
>
>
I'd have to learn how to do that but that would be a plus!
>
Thanks
>
"Gillard" <gillard_george s@@@@@@@@@hotma il.comwrote in message
news:%23m43hz98 IHA.5404@TK2MSF TNGP04.phx.gbl. ..

>what about thread?
>>
>"AAaron123" <aaaron123@road runner.comwrote in message
>news:e0KAws98I HA.5700@TK2MSFT NGP02.phx.gbl.. .

>>I have a timer. At each tick, say 0.1 second, I write a file.
>>>
>>If it takes more than 0.1 second to write the file the app will not work
>>correctly.
>>>
>>How can I tell in the tick event if the previous file finished writing
>>so I can skip writing at that time?
>>>
>>I write using the Bitmap.Save method.
>>>
>>Maybe I could Open, Write, Close synchronously??
>>>
>>Any ideas?
>>>
>>>
>>>
>>>
>>What happens if the Click event takes more that 0.3 seconds to exit.
>>>
>>Do the click events pile up and then come right after each other or are
>>the past ones simply missed?
>>>
>>>
>>Thanks
>>>
>>>
>>>
>>>

>
>

[AAaron123]

Re: writing files in the Tick events when each write takes longer than the interval


Not sure what you mean about the queue. I'd have to save the images and the
queue would write them?
Is that what you mean.

In my post I should have said: it is much like saving the frames of a movie.

Thanks


"rowe_newsgroup s" <rowe_email@yah oo.comwrote in message
news:c99930ac-e6dc-4f8b-8a56-efe557fa049a@26 g2000hsk.google groups.com...
On Aug 1, 9:33 am, "AAaron123" <aaaron...@road runner.comwrote :

I have a timer. At each tick, say 0.1 second, I write a file.
>
If it takes more than 0.1 second to write the file the app will not work
correctly.
>
How can I tell in the tick event if the previous file finished writing so
I
can skip writing at that time?
>
I write using the Bitmap.Save method.
>
Maybe I could Open, Write, Close synchronously??
>
Any ideas?
>
What happens if the Click event takes more that 0.3 seconds to exit.
>
Do the click events pile up and then come right after each other or are
the
past ones simply missed?
>
Thanks

You need to find a solution that doesn't rely on time, otherwise you
will spend the rest of the project's life debugging race conditions.

Is it possible to use a message queue to track the writes? The tick
event would write to the queue, and then the the changes could be
written out from the queue asynchronously.





Also, why not just keep the bitmap in memory and write it to a file
when the changes are done?

Thanks,

Seth Rowe [MVP]

http://sethrowe.blogspot.com/

[rowe_newsgroups]

Re: writing files in the Tick events when each write takes longerthan the interval

On Aug 1, 9:55 am, "AAaron123" <aaaron...@road runner.comwrote :

Not sure what you mean about the queue. I'd have to save the images and the
queue would write them?
Is that what you mean.
>
In my post I should have said: it is much like saving the frames of a movie.
>
Thanks
>
"rowe_newsgroup s" <rowe_em...@yah oo.comwrote in message
>
news:c99930ac-e6dc-4f8b-8a56-efe557fa049a@26 g2000hsk.google groups.com...
On Aug 1, 9:33 am, "AAaron123" <aaaron...@road runner.comwrote :
>
>
>

I have a timer. At each tick, say 0.1 second, I write a file.

>

If it takes more than 0.1 second to write the file the app will not work
correctly.

>

How can I tell in the tick event if the previous file finished writing so
I
can skip writing at that time?

>

I write using the Bitmap.Save method.

>

Maybe I could Open, Write, Close synchronously??

>

Any ideas?

>

What happens if the Click event takes more that 0.3 seconds to exit.

>

Do the click events pile up and then come right after each other or are
the
past ones simply missed?

>

Thanks

>
You need to find a solution that doesn't rely on time, otherwise you
will spend the rest of the project's life debugging race conditions.
>
Is it possible to use a message queue to track the writes? The tick
event would write to the queue, and then the the changes could be
written out from the queue asynchronously.
>
Also, why not just keep the bitmap in memory and write it to a file
when the changes are done?
>
Thanks,
>
Seth Rowe [MVP]http://sethrowe.blogsp ot.com/

At first take, yes you would need to save each bitmap into the queue
and then write them to files asynchronously.

Thanks,

Seth Rowe [MVP]

http://sethrowe.blogspot.com/

[AAaron123]

Re: writing files in the Tick events when each write takes longer than the interval

thanks
"rowe_newsgroup s" <rowe_email@yah oo.comwrote in message
news:50b2992a-3438-4b6e-8940-f7fe40c36ba6@8g 2000hse.googleg roups.com...
On Aug 1, 9:55 am, "AAaron123" <aaaron...@road runner.comwrote :

Not sure what you mean about the queue. I'd have to save the images and
the
queue would write them?
Is that what you mean.
>
In my post I should have said: it is much like saving the frames of a
movie.
>
Thanks
>
"rowe_newsgroup s" <rowe_em...@yah oo.comwrote in message
>
news:c99930ac-e6dc-4f8b-8a56-efe557fa049a@26 g2000hsk.google groups.com...
On Aug 1, 9:33 am, "AAaron123" <aaaron...@road runner.comwrote :
>
>
>

I have a timer. At each tick, say 0.1 second, I write a file.

>

If it takes more than 0.1 second to write the file the app will not work
correctly.

>

How can I tell in the tick event if the previous file finished writing
so
I
can skip writing at that time?

>

I write using the Bitmap.Save method.

>

Maybe I could Open, Write, Close synchronously??

>

Any ideas?

>

What happens if the Click event takes more that 0.3 seconds to exit.

>

Do the click events pile up and then come right after each other or are
the
past ones simply missed?

>

Thanks

>
You need to find a solution that doesn't rely on time, otherwise you
will spend the rest of the project's life debugging race conditions.
>
Is it possible to use a message queue to track the writes? The tick
event would write to the queue, and then the the changes could be
written out from the queue asynchronously.
>
Also, why not just keep the bitmap in memory and write it to a file
when the changes are done?
>
Thanks,
>
Seth Rowe [MVP]http://sethrowe.blogsp ot.com/

At first take, yes you would need to save each bitmap into the queue
and then write them to files asynchronously.

Thanks,

Seth Rowe [MVP]

http://sethrowe.blogspot.com/

[AAaron123]

Re: writing files in the Tick events when each write takes longer than the interval

sorry, I should have said. A changing image but some may repeat. Missing
some is OK.

So should I use a thread to write and check to see if the thread is still
active and only write if it is not active?


Thanks

"Gillard" <gillard_george s@@@@@@@@@hotma il.comwrote in message
news:Odm6W398IH A.2060@TK2MSFTN GP02.phx.gbl...

do you write new image or it is the same image??
>
"AAaron123" <aaaron123@road runner.comwrote in message
news:#6OGr198IH A.1204@TK2MSFTN GP04.phx.gbl...

>Use a thread to write and check to see if the thread is still active??
>>
>Is that what you mean?
>>
>>
>I'd have to learn how to do that but that would be a plus!
>>
>Thanks
>>
>"Gillard" <gillard_george s@@@@@@@@@hotma il.comwrote in message
>news:%23m43hz9 8IHA.5404@TK2MS FTNGP04.phx.gbl ...

>>what about thread?
>>>
>>"AAaron123" <aaaron123@road runner.comwrote in message
>>news:e0KAws98 IHA.5700@TK2MSF TNGP02.phx.gbl. ..
>>>I have a timer. At each tick, say 0.1 second, I write a file.
>>>>
>>>If it takes more than 0.1 second to write the file the app will not
>>>work correctly.
>>>>
>>>How can I tell in the tick event if the previous file finished writing
>>>so I can skip writing at that time?
>>>>
>>>I write using the Bitmap.Save method.
>>>>
>>>Maybe I could Open, Write, Close synchronously??
>>>>
>>>Any ideas?
>>>>
>>>>
>>>>
>>>>
>>>What happens if the Click event takes more that 0.3 seconds to exit.
>>>>
>>>Do the click events pile up and then come right after each other or are
>>>the past ones simply missed?
>>>>
>>>>
>>>Thanks
>>>>
>>>>
>>>>
>>>>

>>
>>

[rowe_newsgroups]

Re: writing files in the Tick events when each write takes longerthan the interval

On Aug 1, 2:52 pm, "AAaron123" <aaaron...@road runner.comwrote :

thanks"rowe_new sgroups" <rowe_em...@yah oo.comwrote in message
>
news:50b2992a-3438-4b6e-8940-f7fe40c36ba6@8g 2000hse.googleg roups.com...
On Aug 1, 9:55 am, "AAaron123" <aaaron...@road runner.comwrote :
>
>
>

Not sure what you mean about the queue. I'd have to save the images and
the
queue would write them?
Is that what you mean.

>

In my post I should have said: it is much like saving the frames of a
movie.

>

Thanks

>

"rowe_newsgroup s" <rowe_em...@yah oo.comwrote in message

>

news:c99930ac-e6dc-4f8b-8a56-efe557fa049a@26 g2000hsk.google groups.com...
On Aug 1, 9:33 am, "AAaron123" <aaaron...@road runner.comwrote :

>

I have a timer. At each tick, say 0.1 second, I write a file.

>

If it takes more than 0.1 second to write the file the app will not work
correctly.

>

How can I tell in the tick event if the previous file finished writing
so
I
can skip writing at that time?

>

I write using the Bitmap.Save method.

>

Maybe I could Open, Write, Close synchronously??

>

Any ideas?

>

What happens if the Click event takes more that 0.3 seconds to exit.

>

Do the click events pile up and then come right after each other or are
the
past ones simply missed?

>

Thanks

>

You need to find a solution that doesn't rely on time, otherwise you
will spend the rest of the project's life debugging race conditions.

>

Is it possible to use a message queue to track the writes? The tick
event would write to the queue, and then the the changes could be
written out from the queue asynchronously.

>

Also, why not just keep the bitmap in memory and write it to a file
when the changes are done?

>

Thanks,

>

Seth Rowe [MVP]http://sethrowe.blogsp ot.com/

>
At first take, yes you would need to save each bitmap into the queue
and then write them to files asynchronously.
>
Thanks,
>
Seth Rowe [MVP]http://sethrowe.blogsp ot.com/

Also, please take a look at how your news reader does it's quoted
text, normally quoted lines have a '>' at the beginning, but yours are
missing. It makes it very hard to track conversations :-)

Thanks,

Seth Rowe [MVP]

http://sethrowe.blogspot.com/

[AAaron123]

Re: writing files in the Tick events when each write takes longer than the interval

Well, now I've got to read up on backgroundworke r message queue.


Thanks for the direction

"Cor Ligthert[MVP]" <notmyfirstname @planet.nlwrote in message
news:86E2D4AD-F865-4074-B6C9-7F259FF5B277@mi crosoft.com...

Aaron,
>
Why not do the writing of the file assynchronous in a backgroundworke r.
>
The queue class will be a greath class to fullfil that.
>
Cor
>
"AAaron123" <aaaron123@road runner.comschre ef in bericht
news:e0KAws98IH A.5700@TK2MSFTN GP02.phx.gbl...

>>I have a timer. At each tick, say 0.1 second, I write a file.
>>
>If it takes more than 0.1 second to write the file the app will not work
>correctly.
>>
>How can I tell in the tick event if the previous file finished writing so
>I can skip writing at that time?
>>
>I write using the Bitmap.Save method.
>>
>Maybe I could Open, Write, Close synchronously??
>>
>Any ideas?
>>
>>
>>
>>
>What happens if the Click event takes more that 0.3 seconds to exit.
>>
>Do the click events pile up and then come right after each other or are
>the past ones simply missed?
>>
>>
>Thanks
>>
>>
>>
>>

>

[AAaron123]

Re: writing files in the Tick events when each write takes longer than the interval

My news reader must have it in for you.
Replies to others look OK.

Can't imagine what is going on!!!!


"rowe_newsgroup s" <rowe_email@yah oo.comwrote in message
news:92bd510c-54c4-4d41-9198-354093229f8e@f3 6g2000hsa.googl egroups.com...
On Aug 1, 2:52 pm, "AAaron123" <aaaron...@road runner.comwrote :

thanks"rowe_new sgroups" <rowe_em...@yah oo.comwrote in message
>
news:50b2992a-3438-4b6e-8940-f7fe40c36ba6@8g 2000hse.googleg roups.com...
On Aug 1, 9:55 am, "AAaron123" <aaaron...@road runner.comwrote :
>
>
>

Not sure what you mean about the queue. I'd have to save the images and
the
queue would write them?
Is that what you mean.

>

In my post I should have said: it is much like saving the frames of a
movie.

>

Thanks

>

"rowe_newsgroup s" <rowe_em...@yah oo.comwrote in message

>

news:c99930ac-e6dc-4f8b-8a56-efe557fa049a@26 g2000hsk.google groups.com...
On Aug 1, 9:33 am, "AAaron123" <aaaron...@road runner.comwrote :

>

I have a timer. At each tick, say 0.1 second, I write a file.

>

If it takes more than 0.1 second to write the file the app will not
work
correctly.

>

How can I tell in the tick event if the previous file finished writing
so
I
can skip writing at that time?

>

I write using the Bitmap.Save method.

>

Maybe I could Open, Write, Close synchronously??

>

Any ideas?

>

What happens if the Click event takes more that 0.3 seconds to exit.

>

Do the click events pile up and then come right after each other or
are
the
past ones simply missed?

>

Thanks

>

You need to find a solution that doesn't rely on time, otherwise you
will spend the rest of the project's life debugging race conditions.

>

Is it possible to use a message queue to track the writes? The tick
event would write to the queue, and then the the changes could be
written out from the queue asynchronously.

>

Also, why not just keep the bitmap in memory and write it to a file
when the changes are done?

>

Thanks,

>

Seth Rowe [MVP]http://sethrowe.blogsp ot.com/

>
At first take, yes you would need to save each bitmap into the queue
and then write them to files asynchronously.
>
Thanks,
>
Seth Rowe [MVP]http://sethrowe.blogsp ot.com/

Also, please take a look at how your news reader does it's quoted
text, normally quoted lines have a '>' at the beginning, but yours are
missing. It makes it very hard to track conversations :-)

Thanks,

Seth Rowe [MVP]

http://sethrowe.blogspot.com/

[rowe_newsgroups]

Re: writing files in the Tick events when each write takes longerthan the interval

My news reader must have it in for you.

Replies to others look OK.

LOL - just noticed that all other replies show up fine. Silly
newsreader and their vendetta's against me :-)

Thanks,

Seth Rowe [MVP]

http://sethrowe.blogspot.com/

[Cor Ligthert[MVP]]

Re: writing files in the Tick events when each write takes longer than the interval

Aaron

It is not a message queue, it is simple a queue.
You enque it in the mainthread and deque it in the background worker in a
loop.
and then you write the map that was in the file (B aware that is only a
reference before you think that it takes memory)

You have to test if it becomes empty, and filled again, because then you
have to restart it again.
Don't forget to synclock it while enqueing and dequing

http://msdn.microsoft.com/en-us/library/system.collections.queue.aspx

Cor


"AAaron123" <aaaron123@road runner.comschre ef in bericht
news:%23lcpfiA9 IHA.3336@TK2MSF TNGP03.phx.gbl. ..

Well, now I've got to read up on backgroundworke r message queue.
>
>
Thanks for the direction
>
"Cor Ligthert[MVP]" <notmyfirstname @planet.nlwrote in message
news:86E2D4AD-F865-4074-B6C9-7F259FF5B277@mi crosoft.com...

>Aaron,
>>
>Why not do the writing of the file assynchronous in a backgroundworke r.
>>
>The queue class will be a greath class to fullfil that.
>>
>Cor
>>
>"AAaron123" <aaaron123@road runner.comschre ef in bericht
>news:e0KAws98I HA.5700@TK2MSFT NGP02.phx.gbl.. .

>>>I have a timer. At each tick, say 0.1 second, I write a file.
>>>
>>If it takes more than 0.1 second to write the file the app will not work
>>correctly.
>>>
>>How can I tell in the tick event if the previous file finished writing
>>so I can skip writing at that time?
>>>
>>I write using the Bitmap.Save method.
>>>
>>Maybe I could Open, Write, Close synchronously??
>>>
>>Any ideas?
>>>
>>>
>>>
>>>
>>What happens if the Click event takes more that 0.3 seconds to exit.
>>>
>>Do the click events pile up and then come right after each other or are
>>the past ones simply missed?
>>>
>>>
>>Thanks
>>>
>>>
>>>
>>>

>>

>
>