C# insert string in multiline string

Question

I have a multiline string (from a txt-file using ReadAllText). the string looks like this:

R;0035709310000026542510X0715;;;  
R;0035709310000045094410P1245;;;  
R;0035709310000026502910Z1153;;;

I want to put in a ";" in each line on place 22, so it looks like this:

R;00357093100000265425;10X0715;;;  
R;00357093100000450944;10P1245;;;  
R;00357093100000265029;10Z1153;;;

The multiline string always contain the samme amount of data but not always 3 lines - sometimes more lines.

How do I make this? Please show some code.

Thanks alot :-) Best regards Bent

Answer 1

Try this ...

using System.IO;
using System.Linq;

var lines = File.ReadAllLines("data.txt");
var results = lines.Select(x => x.Insert(22, ";"));

Answer 2

Step 1, don't use ReadAllText(). Use ReadAllLines() instead.

 string[] myLinesArray = File.ReadAllLines(...);

Step 2, replace all lines (strings) with the changed version.

for(int i = 0; i < myLinesArray.Length; i++)
    myLinesArray[i] = myLinesArray[i].Insert(22, ";");

Step 3, Use WriteAllLines()