EN
C# / .NET - replace last n characters in string
0
points
In this article, we would like to show you how toĀ replaceĀ the last n
characters in a stringĀ inĀ C#.
Quick solution:Ā
int n = 2;
string originalString = "ABCD";
string replaced = originalString.Substring(0, originalString.Length - n) + "12";
Console.WriteLine(originalString); // ABCD
Console.WriteLine(replaced); // AB12
Ā
Practical examples
1. Using Substring()
method
using System;
public class Program
{
static string ReplaceLastLetters(string text, int letterCount, string newLetters)
{
string substring = text.Substring(0, text.Length - letterCount); // ABCD -> AB
return substring + newLetters;
}
public static void Main(string[] args)
{
int n = 2;
string originalString = "ABCD";
string newLetters = "12";
string replaced = ReplaceLastLetters(originalString, n, newLetters);
Console.WriteLine(originalString); // ABCD
Console.WriteLine(replaced); // AB12
}
}
Output:
ABCD
AB12
1. Using Remove()
method
using System;
public class Program
{
static string ReplaceLastLetters(string text, int letterCount, string newLetters)
{
string substring = text.Remove(text.Length - letterCount, letterCount); // ABCD -> AB
return substring + newLetters;
}
public static void Main(string[] args)
{
int n = 2;
string originalString = "ABCD";
string newLetters = "12";
string replaced = ReplaceLastLetters(originalString, n, newLetters);
Console.WriteLine(originalString); // ABCD
Console.WriteLine(replaced); // AB12
}
}
Output:
ABCD
AB12