How to copy ONLY the updated data from a large file? - C / C++ / MFC Discussion Boards

emmatty26-Jun-05 22:27

26-Jun-05 22:27

Hello,
Can i edit a ms flexgrid(insert text into flexgrid and save it to a database).Or How can i place a textbox or combobox into a flexgrid cell.

Thanks in advance,
Best regards,
John.

Re: Editing flexgrid

erkanina28-Jun-05 2:11

erkanina

28-Jun-05 2:11

Subclassing should be usefull

Hey Guys Its me Psycho the Newbie again *DOH*

Psych0hans26-Jun-05 22:04

Psych0hans

26-Jun-05 22:04

I cant seem to understand wat these errors indicate... Can U guys pls help...
Compiling...
ArrayDemo.cpp
Linking...
ArrayDemo.obj : error LNK2001: unresolved external symbol "int __cdecl sumArray(int * const,int)" (?sumArray@@YAHQAHH@Z)
Debug/ArrayDemo.exe : fatal error LNK1120: 1 unresolved externals
Error executing link.exe.

ArrayDemo.exe - 2 error(s), 0 warning(s)

Then why should we turmoil in cares and in fears,
Turn all our tranquill'ty to sighs and to tears?
Let 's eat, drink, and play till the worms do corrupt us,
'Tis certain, Post mortem 25
Nulla voluptas.
For health, wealth and beauty, wit, learning and sense,
Must all come to nothing a hundred years hence. - Thomas Jordan

Re: Hey Guys Its me Psycho the Newbie again *DOH*

One Stone26-Jun-05 22:06

One Stone

26-Jun-05 22:06

It indicates that the implementation of the
int __cdecl sumArray(int * const,int)
function is missing.

Re: Hey Guys Its me Psycho the Newbie again *DOH*

Psych0hans26-Jun-05 22:11

Psych0hans

26-Jun-05 22:11

Truse me 2 make the stupidest of erroes.... LOL I mistypes Sum as Aum...
Thanks for the help though....... Really appreciate it

Then why should we turmoil in cares and in fears,
Turn all our tranquill'ty to sighs and to tears?
Let 's eat, drink, and play till the worms do corrupt us,
'Tis certain, Post mortem 25
Nulla voluptas.
For health, wealth and beauty, wit, learning and sense,
Must all come to nothing a hundred years hence. - Thomas Jordan

Re: Hey Guys Its me Psycho the Newbie again *DOH*

Rahim Rattani26-Jun-05 22:13

Rahim Rattani

26-Jun-05 22:13

You seem to have declared the function sumarray(...) but forgot to implement it.

Rahim Rattani

Problem with dialogs and windows themes

Mathefreak26-Jun-05 21:27

Mathefreak

26-Jun-05 21:27

In my dialog based app I changed the properties of the main dialog from tool window to non tool window (purpose was to show system menu).
Now some users using windows themes have problems with this new version: main menu is partially missing, static and edit controls are looking quite strange

Example with theme:
http://img275.echo.cx/img275/3749/p732122541078284is.jpg[^]

and w/o theme:
http://img104.echo.cx/img104/8655/p732122544251872pq.jpg[^]

Are there any suggestions for solving this? Confused | :confused:

TIA Mathefreak

How to copy ONLY the updated data from a large file?

jahfer26-Jun-05 21:27

jahfer

26-Jun-05 21:27

Hello,

I copied a large file from one disk(source) to another disk(destination). After this I made (manually or programmatically) some changes in the file on the source disk. Now, these changes should reflect in the file on the destination disk also. In order to achieve this, I copied the file again from source to destination. Since the file is a large one this method is not efficient. Because, for any minute change, I have to copy the entire thing.

Is there any way to copy only the updated portion from the file on the source disk to the file on the destination disk?

Hoping to get a reply soon.

Thanks in advance.

regards,
Jahfer V P.

Re: How to copy ONLY the updated data from a large file?

khan++27-Jun-05 1:29

khan++

27-Jun-05 1:29

When you are making changes to the file, make another file (changes-file) also, with your own file format:
Repeat (1) below for every change:
1- The size of data in four bytes (long int) then four bytes (long int) for offset into the file for the data, then the data. Write this into your "changes-file".

Then when you need to update the destination file, repeat (2) below until the end of the file.
2- Read the "changes-file", and correctly read the length of data, offset of data, and the data. Then open the destination file in update mode, move into it at the correct offset, and write out the data you read from the "changes-file".

Does that solve the problem?

this is this.

Re: How to copy ONLY the updated data from a large file?

jahfer27-Jun-05 2:19

jahfer

27-Jun-05 2:19

Dear khan++,

That doesn't solve my problem, because I am not the person going to update the file. More over, the file may get updated not only at its end but anywhere in it.

Any other idea?

regards,
Jahfer V P.

Re: How to copy ONLY the updated data from a large file?

khan++27-Jun-05 2:59

khan++

27-Jun-05 2:59

jahfer wrote:
because I am not the person going to update the file

I don't get it.
The technique I gave can update the file anywhere in it, not just the end, that is why I asked for an offset field.
I hope someone else can help as I am about to logout for the day.

this is this.

Re: How to copy ONLY the updated data from a large file?

John M. Drescher1-Jul-05 8:00

John M. Drescher

1-Jul-05 8:00

Here are a few links to tools that do this by sending only the differences between the two files. They both use the same rsync algorithm to determine what to send:

http://samba.anu.edu.au/rsync/features.html[^]

http://www.cis.upenn.edu/~bcpierce/unison/[^]

John

Image Transformation

ThatsAlok26-Jun-05 20:12

ThatsAlok

26-Jun-05 20:12

Could any body provide me basic algorithms for Fading IN or Fading Out of the Image and other related EFFECT.

Thanks

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta

Re: Image Transformation

FlyingTinman26-Jun-05 21:50

FlyingTinman

26-Jun-05 21:50

I haven't done such a fade in filter but for a smooth
transition--one image fading to another--I'd guess you
just need to scale each pixel's R,G & B values in the
'old' image toward the R,G & B values of the corresponding
pixels in the new image.

e.g if you want to do a full fade from old image to identically
sized new image in 10 steps :

for ( each pixel position in the image(s) ){
<font color=#FBEDB5>__<font color=#000000>for (Step = 1; Step<=10; Step++){
<font color=#FBEDB5>____<font color=#000000>IntermediateR = OldR + (NewR-OldR)/10 * Step;
<font color=#FBEDB5>____<font color=#000000>IntermediateG = OldG + (NewG-OldG)/!0 * Step;
<font color=#FBEDB5>____<font color=#000000>IntermediateB = OldB + (NewB-OldB)/10 * Step;
<font color=#FBEDB5>__<font color=#000000>}
}

(Be sure to use signed types for the RGB values so that
the scaling will correctly handle the cases where R, G or B
in the old image are larger than the corresponding R, G or B
value in the new image.)

If you want to fade to (or from) a 'blank' screen just substitute
the constant 'blank' RGB values for the new (or old) image pixel
position RGB values as required.

Steve T

Re: Image Transformation

ThatsAlok26-Jun-05 22:47

ThatsAlok

26-Jun-05 22:47

Thanks I will try it Smile | :)

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta

Using databases in vc++

smartymanav26-Jun-05 20:06

smartymanav

26-Jun-05 20:06

hi i am making a appliocation which facialates the procedure of student admission in a college...

i hav made a database name "Students" which has 3 tables "student","fees","course" the objective of each table is clear by its name i suppose...

now i have made a odbc object to link the databse in my mfc project...
i want to know that how i use the data of all the 3 tables at the same time...
ie i have designed 3 forms in the same project for each of the 3 tables...now i want to link the tables with the forms...how to do so???please help....

i wud b thankful...this is my first question...so please sorry for making it a long one!!!!

thanks manav

Re: Using databases in vc++

ThatsAlok26-Jun-05 20:15

ThatsAlok

26-Jun-05 20:15

have a look at this section :-
http://www.codeproject.com/database/[^]

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta

Re: Using databases in vc++

smartymanav26-Jun-05 20:55

smartymanav

26-Jun-05 20:55

thanks a lot but i am unable to find any info regar4ding how to use multiple tables in my application...please help....

Re: Using databases in vc++

ThatsAlok26-Jun-05 21:11

ThatsAlok

26-Jun-05 21:11

smartymanav wrote:
but i am unable to find any info regar4ding how to use multiple tables in my application

Have a Try on this Mr. Manav,
http://www.codeproject.com/database/caaadoclass1.asp[^]

I Believe it's yours personel project at MNR

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta

Re: Using databases in vc++

smartymanav26-Jun-05 21:19

smartymanav

26-Jun-05 21:19

thanks again but i am using odbc...

no its not my personal project in my college...i am doing training in stpi and they hav given me this project to design for a college(private)..they have said that if they lie it they will recomend it to the private colege...
please help...

i just want to know how to use multiple tables....i know to make use of the database which only has a single table in vc++ using odbc...

thanking u

Re: Using databases in vc++

ThatsAlok26-Jun-05 21:24

ThatsAlok

26-Jun-05 21:24

Then Use this:-
http://www.codeproject.com/database/caaodbcclass.asp[^]

Buddy,Take my advice:- learn Goggling, otherwise it very difficult to survive in Software Field Frown | :(

smartymanav wrote:
...i am doing training in stpi

STPI : Stands for Software Technology Park or India. AFAIK, there are more than 10 STPI in India. In which one are you working!

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta

Re: Using databases in vc++

smartymanav26-Jun-05 21:26

smartymanav

26-Jun-05 21:26

i am in noida branch of stpi....
ya i have reached this site by googling only!!!

Re: Using databases in vc++

ThatsAlok27-Jun-05 2:21

ThatsAlok

27-Jun-05 2:21

smartymanav wrote:
i am in noida branch of stpi....

There are three Stpi in Noida, One in Sec 29 Ganga Shopping Complex, Second Logix Park Sector 16 and Last One Electronic City Sec 62-63.

In which One are you working Smile | :)

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta

Re: Using databases in vc++

smartymanav27-Jun-05 21:00

smartymanav

27-Jun-05 21:00

hey u know a lot!!!
i am in ganga shopping complex sec 29.....

Re: Using databases in vc++

ThatsAlok27-Jun-05 21:04

ThatsAlok

27-Jun-05 21:04

smartymanav wrote:
am in ganga shopping complex sec 29.....

So u are in birlaSoft Smile | :)

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta

Last Visit: 31-Dec-99 18:00 Last Update: 4-Jun-24 2:37

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