Question

C# 如何得到一个文件的MD5值?

我想写一段代码,将任意一个文件传给他,他返回该文件的MD5值,求代码...要C#的..谢谢!

Answer 1

我给你完整代码

/// <summary>
/// 计算文件的MD5校验
/// </summary>
/// <param name="fileName"></param>
/// <returns></returns>
public static string GetMD5HashFromFile(string fileName)
{
try
{
FileStream file = new FileStream(fileName, FileMode.Open);
System.Security.Cryptography.MD5 md5 = new System.Security.Cryptography.MD5CryptoServiceProvider();
byte[] retVal = md5.ComputeHash(file);
file.Close();

StringBuilder sb = new StringBuilder();
for (int i = 0; i < retVal.Length; i++)
{
sb.Append(retVal[i].ToString("x2"));
}
return sb.ToString();
}
catch (Exception ex)
{
throw new Exception("GetMD5HashFromFile() fail,error:" + ex.Message);
}
}

Answer 2

你不是有 MD5吗 直接传过去 加密 返回就可以了