Read and parse comma-delimited file

shooff27

Read and parse comma-delimited file i need away to read from the end of the file to the begining instead of begining to end as this code does can anyone help me using System; using System.IO; public class rev { public static void Main(string[] a) { string line; string[] strings = new string[100]; char[] separate = {','}; int i, lineNum; if (a.Length != 1) { Console.WriteLine("Usage: prog.exe filename.filetype"); return; } StreamReader file = new StreamReader(a[0]); lineNum = 0; Console.WriteLine(); while ((line = file.ReadLine()) != null) { ++lineNum; i = 0; foreach (string arg in line.Split(separate)) { i++; strings[i] = arg.Trim(); Console.WriteLine("Line {0}, token{1}: {2}", lineNum, i, strings[i]); } Console.WriteLine(); } file.Close(); } }

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spgilmore23y ago
Here's a routine that will read each line and stick it in a string array. Since you don't know the size of the string array that you'll need, you'll have start with a small one and grow it when necessary. This code is untested. It may not even work. I hope it helps, though. private string[] lines = new string[100]; private int linecount=0; private void readfile(string afilename) { linecount=0; StreamReader sr = new StreamReader(afilename); string s; while (s=sr.ReadLine() != null) { addline(s); } } private void addline(string s) { if (lines.Length <= linecount) { string[] newlines = new string[lines.Length+100]; for (int j=0; j=0; j--) { words = lines[j].Split(delimiters, 0xFFFF); /* do something with the words array here! */ } }
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shooff2723y ago
could you give me an example please i am somewhat of a rookie
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juliet_zl23y ago
The streamreader reads a file from beginning to end. Maybe you should just read the whole file first using ReadToEnd() and store the content into a string. Using split to split the line into array and then read the array content from the end to the beginning. Hope it helps.
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