C#学习（1）

来源：互联网发布：海南大学知乎编辑：程序博客网时间：2024/06/08 11:27

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Security;using System.Security.Cryptography;namespace Application1{    class Program    {        static int counter = 0;        static string displayString = "Things can only get better!";        public static string SHA256(string str)        {            // 如果str有中文，不同Encoding的sha是不同的！！             byte[] SHA256Data = Encoding.UTF8.GetBytes(str);            SHA256Managed Sha256 = new SHA256Managed();            byte[] by = Sha256.ComputeHash(SHA256Data);            return BitConverter.ToString(by).Replace("-", "").ToLower(); // 64             // return Convert.ToBase64String(by);                        // 44         }        static void Main(string[] args)        {                      string strPassword = "12345678";                        string sha = SHA256(strPassword);            Console.WriteLine("SHA256:{0}", sha);            Console.ReadKey();        }    }}

代码//如果是文本，先转换为字节序列，如果有汉字，请不要使用 ASCII 编码，会导致汉字变成问号byte[] buffer = Encoding.UTF8.GetBytes("洪星的博客");//UTF-8 编码buffer = Encoding.Default.GetBytes("洪星的博客");//GBK/GB2312 编码//16字节,128位MD5CryptoServiceProvider MD5 = new MD5CryptoServiceProvider();byte[] h1 = MD5.ComputeHash(buffer);//20字节,160位SHA1CryptoServiceProvider SHA1 = new SHA1CryptoServiceProvider();byte[] h2 = SHA1.ComputeHash(buffer);//32字节,256位SHA256CryptoServiceProvider SHA256 = new SHA256CryptoServiceProvider();byte[] h3 = SHA256.ComputeHash(buffer);//48字节,384位SHA384CryptoServiceProvider SHA384 = new SHA384CryptoServiceProvider();byte[] h4 = SHA384.ComputeHash(buffer);//64字节,512位SHA512CryptoServiceProvider SHA512 = new SHA512CryptoServiceProvider();byte[] h5 = SHA512.ComputeHash(buffer);string s1 = BitConverter.ToString(h1).Replace("-", string.Empty);string s2 = BitConverter.ToString(h2).Replace("-", string.Empty);string s3 = BitConverter.ToString(h3).Replace("-", string.Empty);string s4 = BitConverter.ToString(h4).Replace("-", string.Empty);string s5 = BitConverter.ToString(h5).Replace("-", string.Empty);Console.WriteLine(s1);Console.WriteLine(s2);Console.WriteLine(s3);Console.WriteLine(s4);Console.WriteLine(s5);

  public static CookieContainer GetCooKie(string url, string postdata, HttpHeader header)        {            HttpWebRequest request = null;            HttpWebResponse response = null;            try            {                CookieContainer cc = new CookieContainer();                request = (HttpWebRequest)WebRequest.Create(url);                request.Method = header.method;                request.ContentType = header.contentType;                byte[] postdatabyte = Encoding.UTF8.GetBytes(postdata);                request.ContentLength = postdatabyte.Length;                request.AllowAutoRedirect = false;                request.CookieContainer = cc;                request.KeepAlive = true;                 //提交请求                Stream stream;                //stream = request.GetRequestStream();                stream.Write(postdatabyte, 0, postdatabyte.Length);                stream.Close();                 //接收响应                //response = (HttpWebResponse)request.GetResponse();                response.Cookies = request.CookieContainer.GetCookies(request.RequestUri);                 CookieCollection cook = response.Cookies;                //Cookie字符串格式                string strcrook = request.CookieContainer.GetCookieHeader(request.RequestUri);                Console.WriteLine(strcrook);                return cc;            }            catch (Exception ex)            {                Console.WriteLine(ex.ToString());                throw ex;            }        }

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