Add zero padding to a string in C#

This post will discuss how to add zero padding to a string in C#.

1. Using `String.PadLeft()` method

The String.PadLeft() construct a string of a specified length from the original string, where the string is left-padded with the specified character. Note that if the length of the original string is more than the specified length, the PadLeft() method won’t truncate the string.

using System;

public class Example

{

public static void Main()

{

string s = "123";

s = s.PadLeft(5, '0');

Console.WriteLine(s); // 00123

}

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2. Using `String.PadRight()` method

The String.PadRight() construct a string of a specified length from the original string, where the string is right-padded with the specified character.

using System;

public class Example

{

public static void Main()

{

string s = "123";

s = s.PadRight(5, '0');

Console.WriteLine(s); // 12300

}

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Similar to the PadLeft() method, the PadRight() method won’t truncate the string when the length of the string is more than the specified length. To truncate (or pad) a string to a fixed length, invoke the Substring() method on the output of the PadRight() method, as shown below:

using System;

public class Example

{

public static void Main()

{

string s = "123";

int len = 4;

s = s.PadRight(len, '0').Substring(0, len);

Console.WriteLine(s); // 1230

}

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That’s all about adding zero padding to a string in C#.

Add zero padding to a string in C#

1. Using String.PadLeft() method

2. Using String.PadRight() method

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1. Using `String.PadLeft()` method

2. Using `String.PadRight()` method