常用函数集(检验日期，身份证十五位身份证为十八位，得到字符的ASCII码)

  1  /**//// <summary>
  2         /// 检验日期格式是否正确
  3         /// </summary>
  4         public string IsDateFormat(string strDate)#region public string IsDateFormat(string strDate)
  5         public string IsDateFormat(string strDate)
  6         {
  7             strDate = strDate.Trim();
  8 
  9             Regex r1 = new Regex(@"^(?<year>[1-9][0-9]{0,3})/(?<month>[0-9]{1,2})/(?<day>[0-9]{1,2})$");
 10             Regex r2 = new Regex(@"^(?<year>[1-9][0-9]{0,3})-(?<month>[0-9]{1,2})-(?<day>[0-9]{1,2})$");
 11             Regex r3 = new Regex(@"^(?<year>[1-9][0-9]{0,3})年(?<month>[0-9]{1,2})月(?<day>[0-9]{1,2})日$");
 12             Regex r4 = new Regex(@"^(?<month>[0-9]{1,2})/(?<day>[0-9]{1,2})/(?<year>[1-9][0-9]{0,3})$");
 13 
 14             // 取得日期的年，月，日
 15             string year, month, date;
 16 
 17             if(Regex.IsMatch(strDate,@"^(?<month>[0-9]{1,2})/(?<day>[0-9]{1,2})/(?<year>[1-9][0-9]{3})$"))
 18             {
 19                 year = r4.Match(strDate).Result("${year}");
 20                 month = r4.Match(strDate).Result("${month}");
 21                 date = r4.Match(strDate).Result("${day}");
 22             }
 23             else if (Regex.IsMatch(strDate,@"^(?<year>[1-9][0-9]{0,3})/(?<month>[0-9]{1,2})/(?<day>[0-9]{1,2})$"))
 24             {
 25                 year = r1.Match(strDate).Result("${year}");
 26                 month = r1.Match(strDate).Result("${month}");
 27                 date = r1.Match(strDate).Result("${day}");
 28             }
 29             else if(Regex.IsMatch(strDate,@"^(?<year>[1-9][0-9]{0,3})-(?<month>[0-9]{1,2})-(?<day>[0-9]{1,2})$"))
 30             {
 31                 year = r2.Match(strDate).Result("${year}");
 32                 month = r2.Match(strDate).Result("${month}");
 33                 date = r2.Match(strDate).Result("${day}");
 34             }
 35             else if(Regex.IsMatch(strDate,@"^(?<year>[1-9][0-9]{0,3})年(?<month>[0-9]{1,2})月(?<day>[0-9]{1,2})日$"))
 36             {
 37                 year = r3.Match(strDate).Result("${year}");
 38                 month = r3.Match(strDate).Result("${month}");
 39                 date = r3.Match(strDate).Result("${day}");
 40             }            
 41             else
 42             {
 43                 return "error";
 44             }
 45 
 46             // 最后检查日期的正确性
 47             try
 48             {
 49                 System.DateTime dt = new DateTime(Convert.ToInt32(year), Convert.ToInt32(month), Convert.ToInt32(date));
 50                 return dt.ToString("yyyy-MM-dd");
 51             }
 52             catch
 53             {
 54                 return "error";
 55             }
 56         }
 57         #endregion
 58 
 59         ------------------------------------------------------------------------------------------
 60 
 61         /**//// <summary>
 62         /// 检验Email字符串格式是否正确
 63         /// </summary>
 64         public bool IsEmailFormat(string strEmail)#region public bool IsEmailFormat(string strEmail)
 65         public bool IsEmailFormat(string strEmail)
 66         {
 67             return Regex.IsMatch(strEmail, @"^([\w-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([\w-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$");
 68         }
 69         #endregion
 70 
 71         ------------------------------------------------------------------------------------------
 72 
 73 
 74         /**//// <summary>
 75         /// 转换十五位身份证为十八位的函数。
 76         /// </summary>
 77         public string ConvertIDCard15to18(string strTemp)#region public string ConvertIDCard15to18(string strTemp)
 78         public string ConvertIDCard15to18(string strTemp)
 79         {
 80             int[] arrInt = new int[]{7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2};
 81             string arrCh="10X98765432";
 82             int nTemp = 0;
 83             if(strTemp.Length==15)
 84             {
 85                 strTemp = strTemp.Substring(0,6) + "19" + strTemp.Substring(6,strTemp.Length-6);
 86                 for(int i = 0; i < strTemp.Length; i++)
 87                 {
 88                     nTemp += int.Parse(strTemp.Substring(i, 1).ToString()) * arrInt[i];
 89                 }
 90                 strTemp += arrCh[nTemp % 11]; 
 91             }
 92             char dd=arrCh[nTemp % 11]; 
 93             return strTemp;
 94         } 
 95         #endregion
 96         
 97         ------------------------------------------------------------------------------------------
 98 
 99         下在为判断ASCII码的函数组，仅支持中英文
100 
101         /**//// <summary>
102         /// 是否为双字节字符。
103         /// </summary>
104         public static bool IsTwoBytesChar(char chr)
105         {
106             string str =chr.ToString();
107             // 使用中文支持编码
108             Encoding ecode = Encoding.GetEncoding("GB18030");
109             if (ecode.GetByteCount(str) == 2)
110             {
111                 return true;
112             }
113             else
114             {
115                 return false;
116             }
117         }
118 
119         /**//// <summary>
120         /// 得到字符的ASCII码
121         /// </summary>
122         public static int ASCII(char chr)
123         {
124             Encoding ecode = Encoding.GetEncoding("GB18030");
125             Byte[] codeBytes = ecode.GetBytes(chr.ToString());
126             if ( IsTwoBytesChar(chr) )
127             {
128                 // 双字节码为高位乘256，再加低位
129                 // 该为无符号码，再减65536
130                 return (int)codeBytes[0] * 256 + (int)codeBytes[1] - 65536;
131             }
132             else
133             {
134                 return (int)codeBytes[0];
135             }
136         }