1using System;
  2using System.Collections.Generic;
  3using System.Text;
  4using System.Web;
  5using System.Text.RegularExpressions;
  6using System.Security.Cryptography;
  7using System.Globalization;
  8
  9namespace MyUtility
 10...{
 11    public class MyConvert
 12    ...{
 13        对字符串进行加密#region 对字符串进行加密
 14        /**//// <summary>
 15        /// 对字符串进行加密,不可逆
 16        /// </summary>
 17        /// <param name="str">要加密的字符串</param>
 18        /// <param name="format">要使用的哈希算法:md5或sha1</param>
 19        /// <returns></returns>
 20        public static string Encrypt(string str, string format)
 21        ...{
 22            return System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(str, format);
 23        }
 24        #endregion
 25
 26        替换字符串,掉特殊字符#region 替换字符串,掉特殊字符
 27        /**//// <summary>
 28        /// 替换字符串,掉特殊字符
 29        /// </summary>
 30        /// <param name="text"></param>
 31        /// <param name="maxLength"></param>
 32        /// <returns></returns>
 33        public static string ReplaceString(string text, int maxLength)
 34        ...{
 35            if (string.IsNullOrEmpty(text))
 36                return string.Empty;
 37            if (text.Length > maxLength)
 38                text = text.Substring(0, maxLength);
 39            text = Regex.Replace(text, "[\\s]{2,}", " ");    //two or more spaces
 40            text = Regex.Replace(text, "　", " ");
 41            text = Regex.Replace(text, "(<[b|B][r|R]/*>)+|(<[p|P](.|\\n)*?>)", "\n");    //<br>
 42            text = Regex.Replace(text, "(\\s*&[n|N][b|B][s|S][p|P];\\s*)+", " ");    //&nbsp;
 43            text = Regex.Replace(text, "<(.|\\n)*?>", string.Empty);    //any other tags
 44            text = Regex.Replace(text, "\\(|\\)", " ");
 45            text = Regex.Replace(text, "\\[|\\]|［|］|（|）|〔|〕|【|】|〈|〉|「|」|『|』|{|}|﹛|﹜|﹝|﹞|《|》|\\<|\\>|\\?|？", "");
 46            text = text.Replace(">", "");
 47            text = text.Replace("<", "");
 48            text = text.Replace("'", " ");
 49            return GetBanJiao(text);
 50        }
 51        #endregion
 52
 53        全角字符转换为半角字符#region 全角字符转换为半角字符
 54        /**//// <summary>
 55        /// 全角字符转换为半角字符
 56        /// </summary>
 57        /// <param name="quanJianString"></param>
 58        /// <returns></returns>
 59        public static string GetBanJiao(string quanJianString)
 60        ...{
 61            char[] c = quanJianString.ToCharArray();
 62            for (int i = 0; i < c.Length; i++)
 63            ...{
 64                byte[] b = System.Text.Encoding.Unicode.GetBytes(c, i, 1);
 65                if (b.Length == 2)
 66                ...{
 67                    if (b[1] == 255)
 68                    ...{
 69                        b[0] = (byte)(b[0] + 32);
 70                        b[1] = 0;
 71                        c[i] = System.Text.Encoding.Unicode.GetChars(b)[0];
 72                    }
 73                }
 74            }
 75            return new string(c);
 76        }
 77        #endregion
 78
 79        创建Key#region 创建Key
 80        /**//// <summary>
 81        /// 创建Key
 82        /// </summary>
 83        /// <returns></returns>
 84        public string GenerateKey()
 85        ...{
 86            DESCryptoServiceProvider desCrypto = (DESCryptoServiceProvider)DESCryptoServiceProvider.Create();
 87            return ASCIIEncoding.ASCII.GetString(desCrypto.Key);
 88        }
 89        #endregion
 90
 91        加密字符串#region 加密字符串
 92        /**//// <summary>
 93        /// 加密字符串
 94        /// </summary>
 95        /// <param name="sInputString">需加密的字符串</param>
 96        /// <param name="sKey">密钥,长度需8位</param>
 97        /// <returns></returns>
 98        public static string EncryptString(string sInputString, string sKey)
 99        ...{
100            byte[] data = Encoding.UTF8.GetBytes(sInputString);
101            DESCryptoServiceProvider DES = new DESCryptoServiceProvider();
102            DES.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
103            DES.IV = ASCIIEncoding.ASCII.GetBytes(sKey);
104            ICryptoTransform desencrypt = DES.CreateEncryptor();
105            byte[] result = desencrypt.TransformFinalBlock(data, 0, data.Length);
106            return BitConverter.ToString(result);
107        }
108        #endregion
109
110        解密字符串#region 解密字符串
111        /**//// <summary>
112        /// 解密字符串
113        /// </summary>
114        /// <param name="sInputString">需解密的字符串</param>
115        /// <param name="sKey">密钥,长度需8位</param>
116        /// <returns></returns>
117        public static string DecryptString(string sInputString, string sKey)
118        ...{
119            string[] sInput = sInputString.Split("-".ToCharArray());
120            byte[] data = new byte[sInput.Length];
121            for (int i = 0; i < sInput.Length; i++)
122            ...{
123                data[i] = byte.Parse(sInput[i], NumberStyles.HexNumber);
124            }
125            DESCryptoServiceProvider DES = new DESCryptoServiceProvider();
126            DES.Key = ASCIIEncoding.ASCII.GetBytes(sKey);
127            DES.IV = ASCIIEncoding.ASCII.GetBytes(sKey);
128            ICryptoTransform desencrypt = DES.CreateDecryptor();
129            byte[] result = desencrypt.TransformFinalBlock(data, 0, data.Length);
130            return Encoding.UTF8.GetString(result);
131        }
132        #endregion
133    }
134}
135