Here, we will learn what is a byte array, how to convert a file to a byte array in c#, how to convert a byte array to a file in c#, and how to use ReadAllBytes and WriteAllBytes methods in c# with examples.
In c#, the byte array is a data structure that is useful to store the sequence of bytes. A byte is a unit of information that consists of 8 bits, and it will represent a value between 0 and 255. The byte array will contain an array of objects, where each element in the array represents a single byte.
In c#, byte arrays are useful to store and perform operations on binary data such as image files, audio files, etc. To define byte array in c#, we need to use the
byte keyword followed by byte array name and size.
Following is the example of defining the byte array in c#.
The above statement will create a byte array (byteArray) that can store 200 bytes.
To perform any files related operations such as sending files from one system to another, creating or storing the files, etc. it’s a common task to convert a file to a byte array in c#.
In c#, by using
File.ReadAllBytes() method we can convert any file to a byte array. The ReadAllBytes() method is available with the
Following is the example of converting the file to a byte array in c#.
In this example, we are reading the contents of the file (test.png) into a byte array (byteArray) using
This is how we can convert file to byte array and perform any binary data-related operations in c#.
In c#, by using
File.WriteAllBytes() method, we can convert a byte array to a file and this method is available with
Following is the example of converting byte array to file in c#.
In this example, we are reading the file contents from one folder and converting it to a byte array using
File.ReadAllBytes() method. After converting the file content to a byte array, we used
File.WriteAllBytes() method to write the entire byte array to the newly specified file. If the file already exists, it will be overwritten.
If you are working with large files, instead of reading the entire file into memory at once it’s always advisable to read the file in chunks and process each chunk separately.
To process (read and write) files in chunks, we need to use
FileStream class in c#. Following is the example of processing the files in chunks using
FileStream class in c#.
In this example, we used
FileStream class to read the file from one folder and create the file in another folder. Here, we are reading the file in chunks of 1024 bytes and writing each chunk to the new file using the
Write method. When we execute this example, the new file will be created in the specified folder path.
This is how we can use File.ReadAllBytes method to convert a file to byte array and File.WriteAllBytes method to write the byte array to another file. When working with large files, it's better to read the file in chunks using the FileStream class.