asp.net 字符帮助类 类型转换类

浏览数：26 / 时间：2015年06月09日 
  1 /// <summary>
  2     /// 字符帮助类
  3     /// </summary>
  4     public class StringHelper
  5     {
  6         private static readonly Regex RegEmail = new Regex("^\\s*([A-Za-z0-9_-]+(\\.\\w+)*@([\\w-]+\\.)+\\w{2,3})\\s*$", RegexOptions.IgnoreCase); //验证邮箱正则
  7         private static readonly Regex RegHasCHZN = new Regex("[\u4e00-\u9fa5]", RegexOptions.IgnoreCase);//验证是否含中文正则
  8         private static readonly Regex RegCHZN = new Regex(@"^[\u4e00-\u9fa5]{1,}$", RegexOptions.IgnoreCase);//验证是否为中文正则
  9         private static readonly Regex RegPhone = new Regex("(^(\\d{11})$|^((\\d{7,8})|(\\d{4}|\\d{3})-(\\d{7,8})|(\\d{4}|\\d{3})-(\\d{7,8})-(\\d{4}|\\d{3}|\\d{2}|\\d{1})|(\\d{7,8})-(\\d{4}|\\d{3}|\\d{2}|\\d{1}))$)", RegexOptions.IgnoreCase);  //验证电话和手机号码正则
 10         private static readonly Regex RegUrl = new Regex(@"http(s)?://([\w-]+\.)+[\w-]+(/[\w- ./?%&=]*)?",RegexOptions.IgnoreCase);//验证Url正则
 11         private static readonly Regex RegNumber = new Regex(@"^[0-9]*$", RegexOptions.IgnoreCase);//验证纯数字l正则
 12 
 13         #region  判断IP格式
 14 
 15         ///  <summary>
 16         ///  判断是否是IP地址格式  0.0.0.0
 17         ///  </summary>
 18         ///  <param  name="input">待判断的IP地址</param>
 19         ///  <returns>true  or  false</returns>
 20         public static bool IsIPAddress(string input)
 21         {
 22             if (input.IsNullOrEmpty() || input.Length < 7 || input.Length > 15) return false;
 23 
 24             const string regFormat = @"^d{1,3}[.]d{1,3}[.]d{1,3}[.]d{1,3}$";
 25 
 26             var regex = new Regex(regFormat, RegexOptions.IgnoreCase);
 27             return regex.IsMatch(input);
 28         }
 29 
 30         #endregion
 31 
 32         #region 判断邮箱格式
 33 
 34         /// <summary>
 35         /// 判断邮箱格式
 36         /// </summary>
 37         /// <param name="input">文本信息</param>
 38         /// <returns>验证结果</returns>
 39         public static bool IsEmail(string input)
 40         {
 41             if (input.IsNullOrEmpty())
 42                 return false;
 43             Match m = RegEmail.Match(input);
 44             return m.Success;
 45         }
 46         #endregion
 47 
 48         #region 中文字符检测
 49 
 50         /// <summary>
 51         /// 检测是否有中文字符
 52         /// </summary>
 53         /// <param name="input">文本信息</param>
 54         /// <returns>检测结果</returns>
 55         public static bool IsContainCHZN(string input)
 56         {
 57             if (input.IsNullOrEmpty())
 58                 return false;
 59             Match m = RegHasCHZN.Match(input);
 60             return m.Success;
 61         }
 62         #endregion
 63 
 64         #region 判断是否中文
 65         /// <summary>
 66         /// 判断参数是否为中文字符
 67         /// </summary>
 68         /// <param name="input">文本信息</param>
 69         /// <returns></returns>
 70         public static bool IsChinese(string input)
 71         {
 72             if (input.IsNullOrEmpty())
 73                 return false;
 74             Match m = RegCHZN.Match(input);
 75             return m.Success;
 76         } 
 77         #endregion
 78 
 79         #region 判断电话号码
 80         // 电话号码和手机号码检查
 81         /// <summary>
 82         /// 电话号码和手机号码检查
 83         /// </summary>
 84         /// <param name="input">电话号码或手机号码</param>
 85         /// <returns>匹配结果</returns>
 86         public static bool IsPhone(string input)
 87         {
 88             if (input.IsNullOrEmpty())
 89                 return false;
 90             Match m = RegPhone.Match(input);
 91             return m.Success;
 92         }
 93         #endregion 
 94 
 95         #region 判断Url合法性
 96         /// <summary>
 97         /// 验证请求的url是否合法
 98         /// </summary>
 99         /// <param name="input">输入参数</param>
100         /// <returns></returns>
101         public static bool IsUrl(string input)
102         {
103             if (input.IsNullOrEmpty())
104                 return false;
105             Match m = RegUrl.Match(input);
106             return m.Success;
107         }
108         #endregion
109 
110         #region 判断是否数字
111         /// <summary>
112         /// 验证参数是否为数字
113         /// </summary>
114         /// <param name="input">输入字符串</param>
115         /// <returns></returns>
116         public static bool IsNumberic(string input)
117         {
118             if (input.IsNullOrEmpty())
119                 return false;
120             Match m = RegNumber.Match(input);
121             return m.Success;
122         }
123         #endregion
124 
125         #region 字符串截取
126         /// <summary>
127         /// 检查字符串最大长度，返回指定长度的串
128         /// </summary>
129         /// <param name="input">输入字符串</param>
130         /// <param name="maxLength">最大长度</param>
131         /// <returns></returns>
132         public static string TextSbustring(string input, int maxLength)
133         {
134             if (input.IsNullOrEmpty())
135                 return null;
136             input = input.Trim();
137             if (input.Length > maxLength)//按最大长度截取字符串
138                 input = input.Substring(0, maxLength);
139             return input;
140         }
141         #endregion 
142 
143         #region 判断是否含关键词
144         /// <summary>
145         /// 检查是否包含SQL关键字
146         /// </summary>
147         /// <param name="input">被检查的字符串</param>
148         /// <returns>存在SQL关键字返回true，不存在返回false</returns>
149         public static bool IsContainSQLKeyWord(string input)
150         {
151             if (input.IsNullOrEmpty())
152                 return false;
153             string strKeyWord = @"select|insert|delete|from|count(|drop table|update|truncate|asc(|mid(|char(|xp_cmdshell|exec master|netlocalgroup administrators|:|net user|""|or|and";
154             string strRegex = @"[-|;|,|/|(|)|[|]|}|{|%|@|*|!|‘]";
155             if (Regex.IsMatch(input, strKeyWord, RegexOptions.IgnoreCase) || Regex.IsMatch(input, strRegex))
156                 return true;
157             return false;
158         }
159 
160         /// <summary>
161         /// 检查是否含有关键字
162         /// </summary>
163         /// <param name="input">被检查的字符串</param>
164         /// <returns></returns>
165         public static bool IsContainKeywords(string input)
166         {
167             if (input.IsNullOrEmpty())
168                 return false;
169             string sLowerStr = input.ToLower();
170             string sRxStr = @"(\sand\s)|(\sand\s)|(\slike\s)|(select\s)|(insert\s)|(delete\s)|(update\s[\s\S].*\sset)|(create\s)|(\stable)|(<[iframe|/iframe|script|/script])|(‘)|(\sexec)|(declare)|(\struncate)|(\smaster)|(\sbackup)|(\smid)|(\scount)|(cast)|(%)|(\sadd\s)|(\salter\s)|(\sdrop\s)|(\sfrom\s)|(\struncate\s)|(\sxp_cmdshell\s)";
171             Regex sRx = new Regex(sRxStr);
172             return sRx.IsMatch(sLowerStr, 0);
173         }
174         #endregion 
175 
176         #region 判断是否包含空格
177         /// <summary>
178         /// 检查是否包含空格
179         /// </summary>
180         /// <param name="input">被检查的字符串</param>
181         /// <returns>存在空格返回true，不存在返回false</returns>
182         public static bool IsContainSpace(string input)
183         {
184             if (input.IsNullOrEmpty())
185                 return false;
186             if (input.IndexOf(" ") >= 0)
187                 return true;
188             else
189                 return false;
190         }
191         #endregion 
192     }

 

         /// <summary>
        /// 将对象转化为Int32类型
        /// </summary>
        /// <param name="input"></param>
        /// <returns></returns>
        public static int GetInt(this object input)
        {
            return Convert.ToInt32(input);
        }
        /// <summary>
        /// 将对象转化为Int64类型
        /// </summary>
        /// <param name="input"></param>
        /// <returns></returns>
        public static long GetLong(this object input)
        {
            return Convert.ToInt64(input);
        }
        /// <summary>
        /// 将对象转化为DateTime类型
        /// </summary>
        /// <param name="input"></param>
        /// <returns></returns>
        public static DateTime GetDateTime(this object input)
        {
            return Convert.ToDateTime(input);
        }
        /// <summary>
        /// 将对象转化为DateTime类型
        /// </summary>
        /// <param name="input"></param>
        /// <returns></returns>
        public static DateTime? GetDateTimeNullable(this object input)
        {
            if (input == null||input.ToString().IsNullOrEmpty())
                return null;
            return Convert.ToDateTime(input);
        }
        /// <summary>
        /// 将对象转化为Decimal类型
        /// </summary>
        /// <param name="input"></param>
        /// <returns></returns>
        public static Decimal GetDecimal(this object input)
        {
            return Convert.ToDecimal(input);
        }        
        /// <summary>
        /// 将对象转化为Boolean类型
        /// </summary>
        /// <param name="input"></param>
        /// <returns></returns>
        public static bool GetBool(this object input)
        {
            return Convert.ToBoolean(input);
        }

 

 　　　　/// <summary>
        /// 字符串是否为空
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static bool IsNullOrEmpty(this string str)
        {
            return str == null || str == string.Empty || str == "";
        }
        /// <summary>
        /// 字符串是否不为空
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public static bool IsNotNullOrEmpty(this string str)
        {
            return str != null && str != string.Empty && str != "";
        }
        /// <summary>
        /// 判断是否是大于或等于0的整数
        /// </summary>
        /// <param name="input"></param>
        /// <returns></returns>
        public static bool IsNumeric(this string input)
        {
            int output = 0;
            return int.TryParse(input, out output);
        }
        /// <summary>
        /// 判断是否是合法日期
        /// </summary>
        /// <param name="input"></param>
        /// <returns></returns>
        public static bool IsDateTime(this string input)
        {
            DateTime tmp;
            return DateTime.TryParse(input, out tmp);
        }
        /// <summary>
        /// 判断字符串是否是Decimal
        /// </summary>
        /// <param name="obj"></param>
        /// <returns></returns>
        public static bool IsDecimal(this string input)
        {
            Decimal output = 0;
            return decimal.TryParse(input, out output);
        }
        /// <summary>
        /// 判断对象是否是Boolean
        /// </summary>
        /// <param name="obj"></param>
        /// <returns></returns>
        public static bool IsBoolean(this string input)
        {
            bool output = false;
            return Boolean.TryParse(input, out output);
        }

 

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