Question

I’m trying to change some text in a .CSV file.

StreamReader sReader = new StreamReader(path1);
while (sReader.Peek() != -1)
{
    rowValue = sReader.ReadLine();
    if (rowValue == "25")
    {
         sWriter = new StreamWriter(path1);
         rowValue = "27";
         sWriter.WriteLine(rowValue);
    }
}

Nothing happened. What is the correct way, please?

Answer 1

You can easily accomplish this task with System.IO.File.ReadAllLines and System.IO.File.WriteAllLines

string[] lines = File.ReadAllLines(path1);

for(int i = 0; i < lines.Length; i++)
{
  if(lines[i] == "25") lines[i] = "27";
}

File.WriteAllLines(path1, lines);