[传智播客学习日记]计算字符串和文件的MD5值

//计算字符串MD5
public static string GetStringMd5(string txt)
{
MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();
string result = "";
byte[] bytes = Encoding.ASCII.GetBytes(txt);
byte[] cryptBytes = md5.ComputeHash(bytes);
foreach (byte item in cryptBytes)
{
result += item.ToString("X2");
}
return result;
}

//计算文件MD5
public static string GetFileMd5(string path)
{
MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();
string result = "";
using (FileStream fs = new FileStream(path, FileMode.Open))
{
byte[] cryptBytes = md5.ComputeHash(fs);
foreach (byte item in cryptBytes)
{
result += item.ToString("X2");
}
return result;
}
}