C one line code calculates the MD5 value of the file - codeplus series

C# One line of code calculates the file's MD5 value

Preface

MD5 Information digest algorithm （ English ：MD5 Message-Digest Algorithm）, A widely used cryptographic hash function , I can produce one 128 position （16 byte ） Hash value （hash value）, Used to ensure complete and consistent transmission of information .

We often encounter calculation files in the process of development MD5 Scene . How to obtain one line of code simply and efficiently MD5 Is it worth it ？ Let's have a look ！

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introduce CodePlus

Right click the item , choice management NuGet Package

Enter... In the search field CodePlus, After selecting the package in the figure , Select Install .

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Sample code

obtain MD5 Byte array

var md5 = new FileInfo(@"D:\pic.png").GetMD5();

obtain MD5 character string

var md5 = new FileInfo(@"D:\pic.png").GetMD5().ToHexString();

obtain MD5 Other relevant methods

//  To get a small file MD5
var md5 = new FileInfo(@"D:\pic.png").GetMD5ForSmallFile().ToHexString();

//  Get large file MD5
var md5 = new FileInfo(@"D:\pic.png").GetMD5ForLargeFile().ToHexString();

//  Automatic selection ( Greater than 10MB Will execute GetMD5ForLargeFile, Less than or equal to 10MB Will execute GetMD5ForSmallFile)
var md5 = new FileInfo(@"D:\pic.png").GetMD5().ToHexString();