C# Discussion Boards - CodeProject

C# FTP client component with XCRC support?

Veener1-Jun-10 5:50

1-Jun-10 5:50

Are there any C# FTP client libraries or components that support the XCRC command to verify integrity of an uploaded/downloaded file?

Thanks

pixel on photo

Ayu Riza Kurniawati1-Jun-10 4:47

Ayu Riza Kurniawati

1-Jun-10 4:47

how to get pixel value from fhoto if I use C# language program?
i need it at quickly to get my test scores
please.. help me..

Re: pixel on photo

Anthony Mushrow1-Jun-10 4:53

Anthony Mushrow

1-Jun-10 4:53

http://msdn.microsoft.com/en-us/library/system.drawing.bitmap.getpixel.aspx[^]

Have you ever tried putting some effort in yourself?

My current favourite quote is: Punch them in the face, see what happens!

-SK Genius

Re: pixel on photo

J4amieC1-Jun-10 5:51

J4amieC

1-Jun-10 5:51

ayu riza kurniawati wrote:
i need it at quickly to get my test scores

Does that translate to what I think it does?

"Holy crap, im in an exam right now and need this answered so I can scape a pass mark"

Re: pixel on photo

OriginalGriff1-Jun-10 5:56

OriginalGriff

1-Jun-10 5:56

Holy crap Batman! I do believe you are correct! We had best leap into action and try and save his ass!

Do you think he can wait until tomorrow, 'cause I'm off home soon...

Did you know:
That by counting the rings on a tree trunk, you can tell how many other trees it has slept with.

Re: pixel on photo

Anthony Mushrow1-Jun-10 6:13

Anthony Mushrow

1-Jun-10 6:13

OriginalGriff wrote:
Holy crap Batman!

You're not quite getting the gist of this Holy 'X' Batman thing. I think you may have been after something more like:

Holy test papers Batman!

or maybe

Holy exam timetables Batman!

or even

Holy flimflam Batman!

My current favourite quote is: Punch them in the face, see what happens!

-SK Genius

Re: pixel on photo

Luc Pattyn1-Jun-10 6:48

Luc Pattyn

1-Jun-10 6:48

Here you go. Pass the test, join the experts.

for(int y=0; y<photo.Height; y++) {
    for(int x=0; x<photo.Width; x++) {
        Color color=x==y?Color.IamLazy:Color.IamIdiot;
        MessageBox.Show("color="+color.ToString());
    }
}

Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles]

I only read formatted code with indentation, so please use PRE tags for code snippets.

I'm not participating in frackin' Q&A, so if you want my opinion, ask away in a real forum (or on my profile page).

Re: pixel on photo

mprice2141-Jun-10 8:18

mprice214

1-Jun-10 8:18

you think he caught that? Laugh | :laugh:

Re: pixel on photo

Luc Pattyn1-Jun-10 8:30

Luc Pattyn

1-Jun-10 8:30

I'm not sure. He may not notice my solution when he gets distracted by CG providing an appropriate answer here[^].

Smile | :)

Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles]

I only read formatted code with indentation, so please use PRE tags for code snippets.

I'm not participating in frackin' Q&A, so if you want my opinion, ask away in a real forum (or on my profile page).

DataGridViewCellButton will flick when cklicked !!!

reza assar1-Jun-10 4:44

reza assar

1-Jun-10 4:44

hi all
i have write a class with the name : DataGridViewImageButtonCell that will inherited from DataGridViewButtonCell
the main problem is:
DataGridViewCellButton will flick when cklicked
what should i do in order to prevent this problem!
bay the way at the end of pain() method it will call

ButtonRenderer.DrawButton(graphics, buttonArea, buttonImage, imageArea, false, PushButtonState.Normal);

to draw my button
i checked its paint() method to increase its performance but that`s not the case any suggestion ?

Bit manipulation of bytes ? [Solved]

myreki1-Jun-10 4:41

myreki

1-Jun-10 4:41

Hi, I'm new to C# and I'm having some trouble with bit manipulation.
I have Two bytes. The first thing i want to do is to shift the data in one of the bytes four places normally i would do it like this.

byte1 = 00001111
byte1 = byte1 << 4
byte1 = 11110000

however, this seems to work only for integers?
once i have shifted the data i would like to add them together like this.

byte 1 = 11110000

byte 2 = 00001111

bytes added together = 11111111

What is the best way of doing this?

Thank you.

modified on Tuesday, June 1, 2010 10:56 AM

Re: Bit manipulation of bytes ?

OriginalGriff1-Jun-10 4:47

OriginalGriff

1-Jun-10 4:47

Either post this as a QA or in a programming forum - but not both. Otherwise it may get answered by different people, who will get annoyed when they find they are duplicating effort.

Did you know:
That by counting the rings on a tree trunk, you can tell how many other trees it has slept with.

Re: Bit manipulation of bytes ?

harold aptroot1-Jun-10 4:48

harold aptroot

1-Jun-10 4:48

I think what you are encountering is the error that there is no implicit cast from an int to a byte. That's because after any such operation like addition or shift etc "small types" are turned into an int. That's not so bad, though, as you can just cast it back to a byte.

For example:

byte b1 = 15;
byte b2 = (byte)(b1 << 4);
byte b3 = (byte)(b1 | b2); // no addition needed since the bits don't "overlap"

Re: Bit manipulation of bytes ?

PIEBALDconsult1-Jun-10 4:48

PIEBALDconsult

1-Jun-10 4:48

It works, but .net insists on up-casting byte and short operations to int Mad | :mad:

; you need to cast back to byte:

byte a = 15 ;
a = (byte) ( a << 4 ) ;

Re: Bit manipulation of bytes ?

myreki1-Jun-10 4:51

myreki

1-Jun-10 4:51

Thank you guys. Sorry for the double post. I first tried the quick answers section but after i posted my questions i could not locate it in the list. that is why i tried here again.

Thanks again for the fast reply!

Re: Bit manipulation of bytes ?

Anthony Mushrow1-Jun-10 4:58

Anthony Mushrow

1-Jun-10 4:58

myreki wrote:
I first tried the quick answers section but after i posted my questions i could not locate it in the list

Near the top right of the page is a link that may say 'Show Viewed' you might want to click that. I think the default is that once you have viewed a question in QA you will not see it in the list again. Seems a little stupid to me but, there it is.

My current favourite quote is: Punch them in the face, see what happens!

-SK Genius

Re: Bit manipulation of bytes ?

myreki1-Jun-10 5:08

myreki

1-Jun-10 5:08

Ahh, I see.. I completely missed that. Thanks for the heads up Smile | :)

How to create a child process in C#?

martingeorgiev1-Jun-10 2:55

martingeorgiev

1-Jun-10 2:55

Hello,

I need to create a child process in C#. The main process should wait until the child process is done. The execution goes in this order:

/////////////////////////////////

parent process executes some code

parent process creates a child process and goes to sleep

child process executes some code

child process is done executing the code

parent process wakes up

parent process continues execution

///////////////////////////////////

I am looking for some simple implementation i.e. something like the fork() system call available in the C programming language. I don't want to create a new Thread. Any ideas how to achieve this result?

Thank you!

Best,

Martin

Re: How to create a child process in C#?

Abhinav S1-Jun-10 3:01

Abhinav S

1-Jun-10 3:01

Have a look at this article here.

My signature "sucks" today

Re: How to create a child process in C#?

PIEBALDconsult1-Jun-10 4:24

PIEBALDconsult

1-Jun-10 4:24

If the parent is only going to sleep while the child works, why bother having the child?

martingeorgiev wrote:
I don't want to create a new Thread

You can't create an old one.

Re: How to create a child process in C#?

Luc Pattyn1-Jun-10 4:36

Luc Pattyn

1-Jun-10 4:36

It sounds like a great plan: have fun, let others do the work.

D'Oh! | :doh:

Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles]

I only read formatted code with indentation, so please use PRE tags for code snippets.

I'm not participating in frackin' Q&A, so if you want my opinion, ask away in a real forum (or on my profile page).

Re: How to create a child process in C#?

PIEBALDconsult1-Jun-10 4:37

PIEBALDconsult

1-Jun-10 4:37

That's what delegates are for. Big Grin | :-D

Re: How to create a child process in C#?

martingeorgiev1-Jun-10 5:32

martingeorgiev

1-Jun-10 5:32

I tried using delegates. It is giving me the same error message. see my other post below.\

Thanks!

Re: How to create a child process in C#?

PIEBALDconsult1-Jun-10 5:39

PIEBALDconsult

1-Jun-10 5:39

(That was a joke.)

Re: How to create a child process in C#?

martingeorgiev1-Jun-10 5:31

martingeorgiev

1-Jun-10 5:31

My code goes like this:

1. gets the indices of the selected items on the form ( ListView ).
2. the form gets updated.
3. restores the selection on the selected items.

Now, if I process the code as stated above, when trying to restore the selection, I get an error message saying that the index is not available. However, if I put a message box right before the selection code ( maybe to slow down ... I don't really know what the difference is ) kicks in, everything works fine.

What might be causing this problem? I have been trying to figure this out for quite a long time.

Thanks a lot!

Best,
Martin

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