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C# / .NET - replace last n characters in string
0 points
In this article, we would like to show you how to replace the last n characters in a string in C#.
Quick solution:
xxxxxxxxxx1
int n = 2;2
string originalString = "ABCD";3
4
string replaced = originalString.Substring(0, originalString.Length - n) + "12";5
6
Console.WriteLine(originalString); // ABCD7
Console.WriteLine(replaced); // AB12
xxxxxxxxxx1
using System;2
3
public class Program4
{5
static string ReplaceLastLetters(string text, int letterCount, string newLetters)6
{7
string substring = text.Substring(0, text.Length - letterCount); // ABCD -> AB8
return substring + newLetters;9
}10
11
public static void Main(string[] args)12
{13
int n = 2;14
string originalString = "ABCD";15
string newLetters = "12";16
17
string replaced = ReplaceLastLetters(originalString, n, newLetters);18
19
Console.WriteLine(originalString); // ABCD20
Console.WriteLine(replaced); // AB1221
}22
}Output:
xxxxxxxxxx1
ABCD2
AB12xxxxxxxxxx1
using System;2
3
public class Program4
{5
static string ReplaceLastLetters(string text, int letterCount, string newLetters)6
{7
string substring = text.Remove(text.Length - letterCount, letterCount); // ABCD -> AB8
return substring + newLetters;9
}10
11
public static void Main(string[] args)12
{13
int n = 2;14
string originalString = "ABCD";15
string newLetters = "12";16
17
string replaced = ReplaceLastLetters(originalString, n, newLetters);18
19
Console.WriteLine(originalString); // ABCD20
Console.WriteLine(replaced); // AB1221
}22
}Output:
xxxxxxxxxx1
ABCD2
AB12