Convert a String to a Byte Array in C#

We have learned how to convert a byte array to a string in C# in the last article, and we will introduce a method to convert a string to a byte array in C#.

  • Use the GetBytes() method

Use the GetBytes() Method to Convert a String to a Byte Array in C#

In C#, we can use the GetBytes() method of Encoding class to convert a string to a byte array. There are multiple encodings that we can convert into a byte array. These encodings are ASCII, Unicode, UTF32, etc. This method has multiple overloads. We will use the following overload in this case. The correct syntax to use this method is as follows.

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Java-S: Bài 30. Byte Stream: FileInputStream, FileOutputStream
Encoding.GetBytes(String stringName);

This overload of the method GetBytes() has one parameter only. The detail of its parameter is as follows.

Parameters Description
stringName mandatory This is the string that we want to convert to a byte array

This function returns a byte array representing the given string in bytes.

The program below shows how we can use the GetBytes() method to convert a string to a byte array.

using System;
using System.Text;

class StringToByteArray {
  static void Main(string[] args) {
    string myString = "This is a string.";
    byte[] byteArray = Encoding.ASCII.GetBytes(myString);
    Console.WriteLine("The Byte Array is:");
    foreach(byte bytes in byteArray) {
      Console.WriteLine(bytes);
    }
  }
}

Output:

The Byte Array is:
84
104
105
115
32
105
115
32
97
32
115
116
114
105
110
103
46

Related Article - Csharp String

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  • C# Convert Int to String
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  • Convert a String to Boolean in C#
  • Related Article - Csharp Array

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  • C# Convert Int to String
  • Use Strings in Switch Statement in C#
  • Convert a String to Boolean in C#