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   源码介绍

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
using System.Threading.Tasks;
using System.Web.Security;

namespace ConsoleApplication1
{
	public static class Clas
	{
	public static string MD5 (this string text)
		{
			return FormsAuthentication.HashPasswordForStoringInConfigFile (text, "md5");
		}


        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", MessageId = "SHA")]
        public static string SHA1 (this string text)
		{
			return FormsAuthentication.HashPasswordForStoringInConfigFile (text, "sha1");
		}
				public static  string GetMD5_32(string s, string _input_charset)
				{
					MD5 md5 = new MD5CryptoServiceProvider();
					byte[] t = md5.ComputeHash(Encoding.GetEncoding(_input_charset).GetBytes(s));
					StringBuilder sb = new StringBuilder(32);
					for (int i = 0; i < t.Length; i  )
					{
						sb.Append(t[i].ToString("x").PadLeft(2, '0'));
					}
					return sb.ToString();
				}
				static string myMD5(string str)
				{
					string pwd = "";
					MD5 md5 = new  MD5CryptoServiceProvider();
					Byte[] byt = md5.ComputeHash(Encoding.Unicode.GetBytes(str));
					for (int i = 0; i < byt.Length; i  )
					{
						pwd  = byt[i].ToString("x");
					}
					return pwd;
				}
				/// <summary>
				/// MD5 加密（不可逆加密）
				/// </summary>
				/// <param name="pass">要加密的原始字串</param>
				/// <returns></returns> 
				public static string MD5Encrypt(string pass)
				{
					System.Security.Cryptography.MD5 md5 = new System.Security.Cryptography.MD5CryptoServiceProvider();
					byte[] bytResult = md5.ComputeHash(System.Text.Encoding.UTF8.GetBytes(pass));
					md5.Clear();
					string strResult = BitConverter.ToString(bytResult);
					strResult = strResult.Replace("-", "");
					return strResult;
				}
				public static void Example(string userInput)
				{
					string sbc = userInput.ToSBC(); //转全角
					//具体操作，如存入数据库 
					string dbc = userInput.ToDBC();//转半角
					//具体操作，如存入数据库 
				}
				/// <summary>
				/// 转全角(SBC case)
				/// </summary>
				/// <param name="input">任意字符串</param>
				/// <returns>全角字符串</returns>
				public static string ToSBC(this string input)
				{
					char[] c = input.ToCharArray();
					for (int i = 0; i < c.Length; i  )
					{
						if (c[i] == 32)
						{
							c[i] = (char)12288;
							continue;
						}
						if (c[i] < 127)
							c[i] = (char)(c[i]   65248);
					}
					return new string(c);
				}
				/// <summary>
				/// 转半角(DBC case)
				/// </summary>
				/// <param name="input">任意字符串</param>
				/// <returns>半角字符串</returns>
				public static string ToDBC(this string input)
				{
					char[] c = input.ToCharArray();
					for (int i = 0; i < c.Length; i  )
					{
						if (c[i] == 12288)
						{
							c[i] = (char)32;
							continue;
						}
						if (c[i] > 65280 && c[i] < 65375)
							c[i] = (char)(c[i] - 65248);
					}
					return new string(c);
				}
				public static void Example2(string productName)
				{
					string shortName = productName.GetChineseSpell();
				}

				/// <summary>
				/// 获取汉字拼音首字母
				/// </summary>
				/// <param name="s">输入</param>
				/// <returns>汉字拼音首字母，其它字符原样返回</returns>
				public static string GetChineseSpell(this string s)
				{
					return null;//请自行完成
				}
				public static string cc()
				{
					return "adfadsf";
				}
				public static string cc(this string name)
				{
					return name;
				}
				


	
	}

}