Question

I need some assistance, I am writing a method to read a text file, and if any exception occurs I append a line to the text file. e.g “**“

So what I need to know is how can I check for that specific line of text in the text file without reading every line of the text file, like a peek method or something.

Any help would be appreciated.

Thanks in advance.

Answer 1

I have found a solution, the line I have appended to the file will always be the last line in the file, so I created a method to read the last line. See below:

public string ReadLastLine(string path)
        {
            string returnValue = "";
            FileStream fs = new FileStream(path, FileMode.Open);
            for (long pos = fs.Length - 2; pos > 0; --pos)
            {
                fs.Seek(pos, SeekOrigin.Begin);               
                StreamReader ts = new StreamReader(fs);
                returnValue = ts.ReadToEnd();
                int eol = returnValue .IndexOf("\n");
                if (eol >= 0)
                {                    
                    fs.Close();
                    return returnValue .Substring(eol + 1);
                }                
            }
            fs.Close();
            return returnValue ;
        }