C# parsing a text file and storing the values in an array

Question

I am trying to read in a text file which has this format below, into an array:

Previous errors were for Test id \'1234567\' Error id \'12345678\'
Previous errors         


        

Answer 1

Since you already have an array with all the lines of text in, you could just iterate over them, and read out the numbers from each.

One such solution:

// Extention method to simplify:
public static string GetNumbersFromPos(this string line, int nrToSkip)
{
    return new string(line.Skip(nrToSkip)
                            .TakeWhile(c => Char.IsNumber(c))
                            .ToArray());
}

// Assume you get this from your array:
var eachLine = "Previous errors were for Test id '1234567' Error id '12345678'";

// Find nr of chars to skip
var beforeFirstId = eachLine.IndexOf("id '") + 4;
var beforeSecondId = eachLine.IndexOf("id '", beforeFirstId) + 4;

// Now use the extention method to get the two number-strings:
var firstId = eachLine.GetNumbersFromPos(beforeFirstId);
var secondId = eachLine.GetNumbersFromPos(beforeSecondId);

This will give you the numbers as strings in firstId and secondId, which you can then store, or parse to int, or whatever you need.