line number of string

Counting newlines.




You might:

1. Initialize lineno with 0.
2. Read a line, increment lineno.
3. If you find the string inside the line the exit (lineno contains the correct string line number) else go to point 2.

Note you should also handle the 'end-of-file before the string is found' condition.

Mohsen,

Have a look at my answer to exact/match question. That solution inform you the line number.

if you want that how many lines in the text file than you can use this code

private int GetTotalLines(string FileNameWithPath)
{
    string[] bt = null;
    if (System.IO.File.Exists(FileNameWithPath))
    {
        bt = System.IO.File.ReadAllLines(FileNameWithPath);
    }
    return bt.Length;
}

if you want to find line no in which your search string is exist than you can use this function

private int GetLinesNoFromFile(string FileNameWithPath,string searchString)
        {
            string[] bt = null;
            if (System.IO.File.Exists(FileNameWithPath))
            {
                bt = System.IO.File.ReadAllLines(FileNameWithPath);
            }

            for (int i = 0; i < bt.Length; i++)
            {
                string str = bt[i].ToString();
                if (str.Contains(searchString))
                    return i; // data found in line no
            }
            return -1; // nodata found
        }