How to Get File Size in C# .NET

In this article, we will see a simple way to Get File Size in C#.NET.

We will be using a very useful class FileInfo available in C#.NET.

We will cover below aspects,

FileInfo class provides properties and instance methods while dealing with the file,

• Directory – retrieves an object that represents the parent directory of a file.
• DirectoryName – retrieves the full path of the parent directory of a file.
• Exists – checks for the presence of a file.
• IsReadOnly – gets or sets a value that specifies whether a file can be modified.
• Length -gets the size of a file.
• The name gets the name of a file.

Below is a sample method that will give you file size in bytes which you can convert to KB or MB size as required.

 
static long GetFileSize(string FilePath)
        {
            if (File.Exists(FilePath))
            {
                return new FileInfo(FilePath).Length;
            }
            return 0;
        }

FileInfo class has a length property that gives the size, in bytes, of the current file.

            int bytesRead;

            string filePath = @"C:\Test\File\file-input- 
            thecodebuzz.txt";


            long fileSizeibBytes = GetFileSize(filePath);
            

C# Get file size in Bytes

long fileSizeibBytes = GetFileSize(filePath);

C# Get file size in KB

Below is an example to get file size in KB using C#,

long fileSizeibKbs = fileSizeibBytes / 1024;

C# get file size in MB or GB

long fileSizeibMbs = fileSizeibBytes / (1024*1024);

References :

• Unit Test and Mock File methods

• Open file in browser instead of downloading

Do you have any comments or ideas or any better suggestions to share?

Please sound off your comments below.

Happy Coding !!

---

Please bookmark this page and share it with your friends. Please Subscribe to the blog to receive notifications on freshly published(2024) best practices and guidelines for software design and development.

---