New to .NET and file IO

[simon77]

OK, Im trying to read a file in, three columns of numbers in all, each column into a seperate array.

Last week I would have done something like:
char filename[25];
std::ifstream afile(filename); //
and then just loop till the end of the file using the >> operator.

But now weve got .NET installed and having my first a attempt at forms and dialouge boxes rather than my usual console stuff. Anyway Im using streamreader to read the file in but cant grab less than a line at a time.

StreamReader* objReader = new StreamReader
String *sLine = "";
sLine = objReader->ReadLine();

Surely I dont have to search through the string for a empty space and then split the string into smaller ones and then convert to a double. There must be a better way. Please enlighten me. Cheers

Apologies for being dim. I promise Ive googled long and hard for the answer...

 

[PlausiblyDamp]

It may help if you give a little more detail about how the file is structured and what kind of variables etc. you are attempting to read into.
If you wish to read less than a line the StreamReader has a .Read method that gives you a bit more control over the reading process, or as an alternative you could do a .ReadToEnd and then use something like regular expressions to parse the resulting string.

 

[simon77]

basically, its a series of x y z coordinates that I want in three arrays: double x[], double y[] and double z[]. So only three numbers to a line but could be any size numbers and any number of lines. Ill go check out the .Read method. Thanks.

 

[Napivo1972]

Surely I dont have to search through the string for a empty space and then split the string into smaller ones and then convert to a double. There must be a better way. Please enlighten me. Cheers

That is exactly what you need to do but vb.net makes it easy

Try this

Public Sub ReadFile(ByVal Filename As String)
        Dim tStr As String
        Dim Coord(3) As Single
        Dim SR As TextReader = New StreamReader(Filename) Open File
        Do
            tStr = SR.ReadLine

 

[simon77]

Ahh brilliant. Thanks a lots, thats what I was after.