Programming Forums > Application Development > C#

teishu · Jul 24th, 2007, 4:48 AM

Hi, im writing a csv parser and was wondering what you think the best way of returnin the data is. its going to be a class that people can add to there projects. i was going to use arrays but then i remembered that you have to have set the size of the array before the app is compile so thats a problem.. How can i do you do you think ? The csv could have any amount of columns and any amount of lines...

xavier · Jul 24th, 2007, 4:51 AM

If the fixed size is the problem use : List<T> - it's the generic version of ArrayList. So that's that for the number of lines.

teishu · Jul 24th, 2007, 5:02 AM

Does it work like this ?

List<int> blah = new List<int>();
blah.Add(1);

xavier · Jul 24th, 2007, 5:06 AM

yeap.

teishu · Jul 24th, 2007, 5:09 AM

hmm, i take it i cant use it like this:

int totalcolumns = 5;
int count = 0;
while (count < totalcolumns)
{
List<int> count = new List<int>();
count++;
}

to have a list for each column...

teishu · Jul 24th, 2007, 5:57 AM

could i have a list of arrays ?

xavier · Jul 24th, 2007, 6:06 AM

you sure can. You can have a list of lists like :
List<List<string>> xxx = new List<List<string>>();
so xxx[0] will return a List<string>.(that would be one row from the file.)

Arla · Jul 24th, 2007, 8:13 PM

Personally I'd do it with ArrayList (when I say I'd do it with ArrayList, I mean that's what I did it with, I have both CSV pasers and CSV writers)

john Wesley · Jul 24th, 2007, 8:49 PM

I agree that a strong-typed list is not neccesary unless explicitly called for, an ArrayList also has a dynamic length.

You could however, as you are talking of above, use generics to keep track of the column and value, but I guess you already have a structure for matching up memorised values already.

Jul 24th, 2007, 4:48 AM	#1
teishu Programmer Join Date: May 2006 Posts: 51 Rep Power: 3	c# advice for csv files.. Hi, im writing a csv parser and was wondering what you think the best way of returnin the data is. its going to be a class that people can add to there projects. i was going to use arrays but then i remembered that you have to have set the size of the array before the app is compile so thats a problem.. How can i do you do you think ? The csv could have any amount of columns and any amount of lines... __________________ AMD Athlon X2 4200+ -- Asus V3-M2V890 -- 2GB Kingston -- Vista Ultimate 32bit + Ubuntu 8.04 Intel C2D T5870 2.0GHZ -- Vostro 1510 -- 2048MB -- Windows XP SP2 *ASCII stupid question, get a stupid ANSI !*

Jul 24th, 2007, 4:51 AM	#2
xavier Professional Programmer Join Date: Oct 2004 Location: .ro Posts: 379 Rep Power: 4	If the fixed size is the problem use : List<T> - it's the generic version of ArrayList. So that's that for the number of lines. __________________ Don't take life too seriously, it's not permanent !

Jul 24th, 2007, 5:02 AM	#3
teishu Programmer Join Date: May 2006 Posts: 51 Rep Power: 3	Does it work like this ? List<int> blah = new List<int>(); blah.Add(1); __________________ AMD Athlon X2 4200+ -- Asus V3-M2V890 -- 2GB Kingston -- Vista Ultimate 32bit + Ubuntu 8.04 Intel C2D T5870 2.0GHZ -- Vostro 1510 -- 2048MB -- Windows XP SP2 *ASCII stupid question, get a stupid ANSI !*

Jul 24th, 2007, 5:06 AM	#4
xavier Professional Programmer Join Date: Oct 2004 Location: .ro Posts: 379 Rep Power: 4	yeap. __________________ Don't take life too seriously, it's not permanent !

Jul 24th, 2007, 5:09 AM	#5
teishu Programmer Join Date: May 2006 Posts: 51 Rep Power: 3	hmm, i take it i cant use it like this: int totalcolumns = 5; int count = 0; while (count < totalcolumns) { List<int> count = new List<int>(); count++; } to have a list for each column... __________________ AMD Athlon X2 4200+ -- Asus V3-M2V890 -- 2GB Kingston -- Vista Ultimate 32bit + Ubuntu 8.04 Intel C2D T5870 2.0GHZ -- Vostro 1510 -- 2048MB -- Windows XP SP2 *ASCII stupid question, get a stupid ANSI !*

Jul 24th, 2007, 5:57 AM	#6
teishu Programmer Join Date: May 2006 Posts: 51 Rep Power: 3	could i have a list of arrays ? __________________ AMD Athlon X2 4200+ -- Asus V3-M2V890 -- 2GB Kingston -- Vista Ultimate 32bit + Ubuntu 8.04 Intel C2D T5870 2.0GHZ -- Vostro 1510 -- 2048MB -- Windows XP SP2 *ASCII stupid question, get a stupid ANSI !*

Jul 24th, 2007, 6:06 AM	#7
xavier Professional Programmer Join Date: Oct 2004 Location: .ro Posts: 379 Rep Power: 4	you sure can. You can have a list of lists like : List<List<string>> xxx = new List<List<string>>(); so xxx[0] will return a List<string>.(that would be one row from the file.) __________________ Don't take life too seriously, it's not permanent !

Jul 24th, 2007, 8:13 PM	#8
Arla Hobbyist Programmer Join Date: Mar 2005 Posts: 156 Rep Power: 4	Personally I'd do it with ArrayList (when I say I'd do it with ArrayList, I mean that's what I did it with, I have both CSV pasers and CSV writers)

Jul 24th, 2007, 8:49 PM	#9
john Wesley Hobbyist Programmer Join Date: May 2006 Location: United Kingdom Posts: 119 Rep Power: 3	I agree that a strong-typed list is not neccesary unless explicitly called for, an ArrayList also has a dynamic length. You could however, as you are talking of above, use generics to keep track of the column and value, but I guess you already have a structure for matching up memorised values already. __________________ Mona Lisa must of had the highway blues you can tell by the way she smiles..

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
How do I read .mbm (Multi BitMap) files?	moondog	Other Programming Languages	19	Aug 16th, 2007 8:59 PM
Unix commands compatible with Windows?	titaniumdecoy	Bash / Shell Scripting	7	Oct 5th, 2006 7:25 AM
Command Prompt	SkyPioneer	Coder's Corner Lounge	5	May 3rd, 2006 10:07 PM
Checking source codes of image, audio and video files	on_auc	C++	3	Feb 21st, 2005 8:36 PM
shutil.copy corrupting files?	TimL	Python	0	Feb 20th, 2005 3:32 PM

Programming Forums > Application Development > C#

c# advice for csv files..