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I am verry sorry. I try to create one program and it really worked at only my computer with current user. I could not connect to other computers, even my localhost with other accounts. LogonUser always returned FALSE. Please could you give me some code. Needn't API, non MFCs are OK.
Thank you very much.
Sincerely
Thangnvhl
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I want load items from database fast ! you have any ideea how ?
Because my database contain 500-1000 data it is slow when i loaded in my CListCtrl ( 3 -> 6 minutes ) i want to load them more fast... how?
this is my code when i load them :
void CMyList::FillList()
{
CData *pData = new CData();
pData->Open();
CString sNrInregistrare;
if (pData->GetRecordCount())
pData->MoveFirst();
while(!pData->IsEOF())
{
int nItem = m_list.GetItemCount();
sNrInregistrare.Format("%d",pData->m_name);
m_list.InsertItem(nItem,sNrInregistrare);
m_list.SetItemText(nItem,0,pData->m_name);
m_list.SetItemText(nItem,1,pData->m_city);
pData->MoveNext();
}
pData->Close();
}
Please help !!!!!!!!!!!!!
Thank you !!!!
-- modified at 3:00 Monday 14th August, 2006
Bravoone
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How do you use for read from database is this your code?
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yes is my code !
Bravoone
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One way is prasad_som answer one way is insert your code to a thread
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One strategy would be like this..
dont fetch all the data at one time. You must know no of rows for that.
First insert empty rows,equal to number of records.
now bring data from database, that would be visible(say its will be 6-7 rows or more). Keep other rows empty.When you make other row visible by scrolling, bring data for those rows ,too.
This way you can avoid fetching bulk data from database at one go.
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Hi, i just created a setup file for my program. How can i create an uninstall file that will be located in the program's folder?
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Hi, does anyone know a good article on how to use working threads in visual c++?
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cv_k3n wrote: how to use working threads in visual c++?
you mean "worker thread", isn't it?
may be this is useful for you.
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Thanks.. I was reading throught this article and i came upon a small problem. It's the part where it teaches you how to shut down the thread: http://www.codeproject.com/threads/usingworkerthreads.asp#Shutting%20down%20a%20thread%20from%20a%20view%20or%20main%20frame
The problem is this function: ' WaitForSingleObject(myWorkerThread->m_hThread, INFINITE); '
This function will wait for the thread to terminate before proceeding. However, it seems like my thread doens't ever terminates although in actual fact it does. Why is this so? Am I missing an output signal saying that my thread is done? BTW, i used a very simple 'for' loop in my thread, Just like in the example. It looks something like this:
m_progress.SetRange(0,100);<br />
for(x = 0; running && x < m_num; x++)<br />
{<br />
count++;<br />
counter = (float) count/m_num;<br />
m_progress.SetPos((float)counter*100);<br />
}<br />
<br />
m_progress.SetPos(0);<br />
running = FALSE;
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Thanks.. I managed to implement worker threads in my program but i noticed 1 problem. Whenever i call the UpdateData(FALSE) function in my thread, a 'Debug Assertion Failed!' error pops up. Is there a way to overcome this problem?
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Well, i was using UpdateData(FALSE) to change some CStatic text in my Dialog Box using the worker thread but it always gives me that error. There is no compilation error. Just that error when i run the thread.
I have another question, how do i start another funcion upon the completion of my thread? Is there a way i can 'signal' to my other function saying that the worker thread is done?
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(1)It seems that this problem isnt for thread do you have a specific code in your thread and
maybe this error is in declare thread (i know your code is ok this error is a runtime error)
----------------
(2)
Hope I understood your question
Do you need to GetExitCodeThread if its not you can check your thread when it created
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Sorry but i don't quite get your explanation for my second question. What i want to do is to call another function when my thread finishes whatever it was doing. Hope you can explain it to me again. Thanks.
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when you create a thread how do you finish it.TerminateThread if you use from this function then you can use GetExitCodeThread
that retrieves status from thread and you can check status returned that is STILL_ACTIVE or no
Is this your question?
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Thanks for your help... i've tried it but i'm not sure if its right.
Does this look right to you:
TerminateThread(myWorkerThread,GetExitCodeThread(myWorkerThread,0));
Another Question:
Assuming the code below,
MyDialog::MyThread()<br />
{<br />
int i = 0;<br />
while (i < 5000)<br />
i++;<br />
}
I understand that a worker thread is not supposed to touch a GUI object. Is there a way to terminate this thread(when it completes, ie i = 5000) and call another function that can actually change some GUI variables?
Thank you so much for your help.
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one thing that i think its important a thread remain in system until you terminate it and close all handle with CloseHandle
(1)TerminateThread is for finish a thread when you call this function for get exit value if thread is active you get STILL_ACTIVE else you get value that is in second parameter from this function dxExitCode
(2)
Hope I understood your question
It seems that its depend to previous your questions(check when i=5000 finish thread and load your function) is your question?
(you can use from WM_TIMER instead a while(5000) when you need to 5000 you can set SetTimer(...) and when i=5000 in wm_timer you can Kill timer with killTimer and run another function )
if its your answer i am glad if its not your answer so
you can ask and if i can i answer to you
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Hi all,
Iam having a checksum algo implemented in my code.
The Pc receives a packet from microcontroller and then does this as a check:
for(i=0;i < max_length-1;i++)<br />
{<br />
checksum ^= recd_buf[i];<br />
}
then this checksum is compared with the last member fo the received packet which has the checksum sent from microcontroller.
if(checksum != recd_buf[max_length-1])<br />
{<br />
"bad packet"<br />
}
but i always get the values to be not equal. By printing out the received packet details, they are all correct.
there s no error on the microcontroller end.
There is error in the calcualtion of checksum at the Pc end (the code shown above).
Can anyone help? I know there are various checksum algos available. but i want to find out the bug/error in this.
thanks in advance.
-- modified at 0:39 Monday 14th August, 2006
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look here
if(checksum != recd_buf[max_length-1])
{
"bad packet"
}
do you think in " recd_buf[max_length-1]) "
the "max_length-1 " is ok. why donot you compare with
"max_length " . Because in first "for loop " your iterator "i" starts from " 0 " but at this time you are just checking maximum length.
as long I think
if(checksum != recd_buf[max_length])
{
"bad packet"
}
Tanvon
the brain behind ...
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I think his loop is correct, because you usually don't include the check sum value in the check sum algo, hence the < max_length - 1 in the loop control. If you did recd_buf[max_length], that would be out of bounds, since it's zero based.
Thinking about it more, maybe the checksum should be part of the algo, maybe try i < max_length, instead of max_length - 1, and see if that works.
I've seen some other algorithms as well, but try that first.
- S
50 cups of coffee and you know it's on!
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Is checksum initialized properly?
What are your data types? When using the bitwise operators, all types should be unsigned. You may be getting bit by sign-extension or some other result of integral promotion.
--Mike--
Visual C++ MVP 
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