计算文件的Hash值

计算文件的Hash值

具体的算法代码如下

using (FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.Read))
                {
                    //计算文件的SHA1值
                    System.Security.Cryptography.SHA1 calculator = System.Security.Cryptography.SHA1.Create();
                    Byte[] buffer = calculator.ComputeHash(fs);
                    calculator.Clear();
                    //将字节数组转换成十六进制的字符串形式
                    StringBuilder stringBuilder = new StringBuilder();
                    for (int i = 0; i < buffer.Length; i++)
                    {
                        stringBuilder.Append(buffer[i].ToString("x2"));
                    }
                    hashSHA1 = stringBuilder.ToString();
                }