先获取密码：

sql修改二进制加密密码_ico

 

 

生成sha1密码字符串



static void Main(string[] args)
        {
            try
            {
                //写法一
                var shastr = new SHA1CryptoServiceProvider().ComputeHash(new UnicodeEncoding().GetBytes("Jin888888"));
                var shabytestr = ByteArrayToHexString(shastr);
                Console.WriteLine("0x"+shabytestr);

                //写法二
                var sea = "0x" + EncryptSHA1("Jin888888");
                Console.WriteLine(sea);

                //写法三
                byte[] cleanBytes = Encoding.Unicode.GetBytes("Jin888888");
                byte[] hashedBytes = System.Security.Cryptography.SHA1.Create().ComputeHash(cleanBytes);
                string sign = BitConverter.ToString(hashedBytes).Replace("-", "").ToUpper();
                Console.WriteLine("0x" + sign);

                Console.ReadKey();
            }
            catch (Exception ex)
            {
                throw;
            }
        } 

        private static string ByteArrayToHexString(byte[] buf)
        {
            return BitConverter.ToString(buf).Replace("-", "");
        }

        public static string EncryptSHA1(string input)
        {
            byte[] inputBytes = Encoding.Unicode.GetBytes(input);

            SHA1 sha = new SHA1CryptoServiceProvider();

            byte[] result = sha.ComputeHash(inputBytes);

            StringBuilder sBuilder = new StringBuilder();

            for (int i = 0; i < result.Length; i++)
            {
                sBuilder.Append(result[i].ToString("X2"));
            }
            return sBuilder.ToString();
        }


 

 

 --修改密码



--参考：https://blog.csdn.net/yuhu1023/article/details/88383119
UPDATE dbo.AccountsUsers SET Password=CONVERT(varbinary(512),0x6ED5833CF35286EBF8662B7B5949F0D742BBEC3F) WHERE UserId=2157


--获取字符串二进制流
--参考：https://www.cnblogs.com/qing-xuanlvyee/articles/4756954.html
select convert (varbinary(256),'123456') AS binvalue

--将流拼接输出为字符串
DECLARE @binvalue VARBINARY(256),
        @vcharvalue NVARCHAR(256);
SET @binvalue = 0xF5FF3FED3B055DF7EC27251FBC80EE48;
SELECT @vcharvalue = N'aa' + master.dbo.fn_varbintohexsubstring(1, @binvalue, 1, 0);
PRINT @vcharvalue;


 C# string类型和byte[]类型相互转换

https://www.jianshu.com/p/766e12c66db8

C# 获取文件MD5、SHA1

https://www.cnblogs.com/shy1766IT/p/7307142.html

将String转化成Stream，将Stream转换成String, C# Stream 和 byte[] 之间的转换(文件流的应用)