1 using System;  2 using System.Collections.Generic;  3 using System.Data;  4 using System.IO;  5 using System.Linq;  6 using System.Reflection;  7 using System.Runtime.Serialization.Formatters.Binary;  8 using System.Text;  9 using System.Text.RegularExpressions; 10 using System.Xml; 11 using System.Xml.Linq; 12 using System.Xml.Serialization; 13  14 namespace FrameWork.Utilities.Extension 15 { 16     /// <summary> 17     /// 常用枚举 18     /// </summary> 19     public static class HibityExtension 20     { 21         #region 第一天最后一天 22  23         /// <summary> 24         ///     第一天 25         /// </summary> 26         /// <param name="current"></param> 27         /// <returns></returns> 28         public static DateTime First(this DateTime current) 29         { 30             var first = current.AddDays(1 - current.Day); 31             return first; 32         } 33  34         /// <summary> 35         ///     最后一天 36         /// </summary> 37         /// <param name="current"></param> 38         /// <returns></returns> 39         public static DateTime Last(this DateTime current) 40         { 41             var daysInMonth = DateTime.DaysInMonth(current.Year, current.Month); 42             var last = current.First().AddDays(daysInMonth - 1); 43             return last; 44         } 45  46         #endregion 47  48         #region 字符串是否为空 49  50         /// <summary> 51         ///     字符串是否为空 52         /// </summary> 53         /// <param name="s"></param> 54         /// <returns></returns> 55         public static bool IsEmpty(this string s) 56         { 57             return string.IsNullOrWhiteSpace(s); 58         } 59  60         #endregion 61  62         #region 将指定字符串中的格式项替换为指定数组中相应对象的字符串表示形式 63  64         /// <summary> 65         ///     将指定字符串中的格式项替换为指定数组中相应对象的字符串表示形式。 66         /// </summary> 67         /// <param name="format"></param> 68         /// <param name="args"></param> 69         /// <returns></returns> 70         public static string FormatWith(this string format, params object[] args) 71         { 72             return string.Format(format, args); 73         } 74  75         #endregion 76  77         #region 指示所指定的正则表达式在指定的输入字符串中是否找到了匹配项 78  79         /// <summary> 80         ///     指示所指定的正则表达式在指定的输入字符串中是否找到了匹配项。 81         /// </summary> 82         /// <param name="s"></param> 83         /// <param name="pattern"></param> 84         /// <returns></returns> 85         public static bool IsMatch(this string s, string pattern) 86         { 87             return s != null && Regex.IsMatch(s, pattern); 88         } 89  90         #endregion 91  92         #region 验证邮箱 93  94         /// <summary> 95         ///     验证邮箱 96         /// </summary> 97         /// <param name="source"></param> 98         /// <returns></returns> 99         public static bool IsEmail(string source)100         {101             return Regex.IsMatch(source,102                 @"^[A-Za-z0-9](([_\.\-]?[a-zA-Z0-9]+)*)@([A-Za-z0-9]+)(([\.\-]?[a-zA-Z0-9]+)*)\.([A-Za-z]{2,})$",103                 RegexOptions.IgnoreCase);104         }105 106         #endregion107 108         #region String True Or False 转 bool109 110         public static bool ToBool(this string value)111         {112             if (string.IsNullOrWhiteSpace(value)) return false;113             return value.ToLower() == "true";114         }115 116         #endregion117 118         #region 比较字符串119 120         /// <summary>121         ///     比较两个字符串在忽略大小写的情况下是否相等122         /// </summary>123         /// <param name="value">字符串1</param>124         /// <param name="compareTo">要比较的字符串</param>125         /// <returns>是否相等</returns>126         public static bool IsIgnoreCaseEqualTo(this string value, string compareTo)127         {128             return string.Compare(value, compareTo, StringComparison.OrdinalIgnoreCase) == 0;129         }130 131         #endregion132 133         #region String.Join134 135         /// <summary>136         ///     using the specified separator between each137         /// </summary>138         /// <param name="source"></param>139         /// <param name="separator"></param>140         /// <returns></returns>141         public static string Join(this IEnumerable<string> source, string separator)142         {143             return string.Join(separator, source);144         }145 146         #endregion147 148         #region string转枚举对象149 150         /// <summary>151         ///     string转枚举对象152         /// </summary>153         /// <typeparam name="T"></typeparam>154         /// <param name="value"></param>155         /// <returns></returns>156         public static T ToEnum<T>(this string value)157             where T : struct158         {159             return (T) Enum.Parse(typeof (T), value, true);160         }161 162         #endregion163 164         #region MD5165 166         /// <summary>167         ///     计算指定字符串的MD5值168         /// </summary>169         /// <param name="key">要计算Hash的字符串</param>170         /// <returns>字符串的Hash</returns>171         public static string MD5(this string key)172         {173             return key.MD5(Encoding.UTF8);174         }175 176         /// <summary>177         ///     计算指定字符串的MD5值178         /// </summary>179         /// <param name="key">要计算Hash的字符串</param>180         /// <param name="encoding">计算Hash的编码方法</param>181         /// <returns>字符串的Hash</returns>182         public static string MD5(this string key, string encoding)183         {184             return key.MD5(Encoding.GetEncoding(encoding));185         }186 187         /// <summary>188         ///     计算指定字符串的MD5值189         /// </summary>190         /// <param name="key">要计算Hash的字符串</param>191         /// <param name="encoding">计算Hash的编码方法</param>192         /// <returns>字符串的Hash</returns>193         public static string MD5(this string key, Encoding encoding)194         {195             if (key == null) throw new ArgumentNullException();196 197             var md5 = System.Security.Cryptography.MD5.Create();198             var has = md5.ComputeHash(encoding.GetBytes(key));199             return BitConverter.ToString(has).Replace("-", "").ToUpper();200         }201 202         #endregion203 204         #region 枚举转list对象205 206         public static List<T> EnumToList<T>()207         {208             var enumType = typeof (T);209 210             // Can‘t use type constraints on value types, so have to do check like this211             if (enumType.BaseType != typeof (Enum))212                 throw new ArgumentException("T must be of type System.Enum");213 214             var enumValArray = Enum.GetValues(enumType);215 216             var enumValList = new List<T>(enumValArray.Length);217             enumValList.AddRange(from int val in enumValArray select (T) Enum.Parse(enumType, val.ToString()));218             return enumValList;219         }220 221         #endregion222 223         #region 枚举转字典对象224 225         public static IDictionary<string, int> EnumToDictionary(this Type t)226         {227             if (t == null) throw new NullReferenceException();228             if (!t.IsEnum) throw new InvalidCastException("object is not an Enumeration");229 230             var names = Enum.GetNames(t);231             var values = Enum.GetValues(t);232 233             return (from i in Enumerable.Range(0, names.Length)234                 select new {Key = names[i], Value = http://www.mamicode.com/(int) values.GetValue(i)})235                 .ToDictionary(k => k.Key, k => k.Value);236         }237 238         #endregion239 240         #region 序列化反序列化xml241 242         /// <summary>243         ///     序列化成UTF8 格式的无命名空间的xml244         /// </summary>245         /// <param name="root"></param>246         /// <returns></returns>247         public static string ToXml<T>(this T root) where T : new()248         {249             var stream = new MemoryStream();250             var xml = new XmlSerializer(typeof (T));251             var xwriter = new XmlTextWriter(stream, Encoding.UTF8);252             //Create our own namespaces for the output253             var ns = new XmlSerializerNamespaces();254             //Add an empty namespace and empty value255             ns.Add("", "");256             try257             {258                 //序列化对象259                 xml.Serialize(xwriter, root, ns);260             }261             catch (InvalidOperationException)262             {263                 throw;264             }265             stream.Position = 0;266             var sr = new StreamReader(stream);267             var str = sr.ReadToEnd();268             sr.Dispose();269             stream.Dispose();270             return str;271         }272 273         /// <summary>274         ///     反序列成对象275         /// </summary>276         /// <param name="xml">xml</param>277         /// <returns></returns>278         public static object FromXml<T>(this string xml) where T : new()279         {280             using (var sr = new StringReader(xml))281             {282                 var xmldes = new XmlSerializer(typeof (T));283                 return (T) xmldes.Deserialize(sr);284             }285         }286 287         public static T Deserialize<T>(this XDocument xmlDocument)288         {289             var xmlSerializer = new XmlSerializer(typeof (T));290             using (var reader = xmlDocument.CreateReader())291                 return (T) xmlSerializer.Deserialize(reader);292         }293 294         #endregion295 296         #region DataTable转list ，list 转DataTable297 298         public static DataTable ToDataTable<T>(this IEnumerable<T> varlist)299         {300             var dtReturn = new DataTable();301             // column names 302             PropertyInfo[] oProps = null;303             if (varlist == null) return dtReturn;304             foreach (var rec in varlist)305             {306                 // Use reflection to get property names, to create table, Only first time, others will follow 307                 if (oProps == null)308                 {309                     oProps = rec.GetType().GetProperties();310                     foreach (var pi in oProps)311                     {312                         var colType = pi.PropertyType;313                         if ((colType.IsGenericType) && (colType.GetGenericTypeDefinition() == typeof (Nullable<>)))314                         {315                             colType = colType.GetGenericArguments()[0];316                         }317                         dtReturn.Columns.Add(new DataColumn(pi.Name, colType));318                     }319                 }320                 var dr = dtReturn.NewRow();321                 foreach (var pi in oProps)322                 {323                     dr[pi.Name] = pi.GetValue(rec, null) ?? DBNull.Value;324                 }325                 dtReturn.Rows.Add(dr);326             }327             return dtReturn;328         }329 330         public static List<T> ToList<T>(this DataTable table) where T : class, new()331         {332             try333             {334                 var list = new List<T>();335 336                 foreach (var row in table.AsEnumerable())337                 {338                     var obj = new T();339 340                     foreach (var prop in obj.GetType().GetProperties())341                     {342                         try343                         {344                             var propertyInfo = obj.GetType().GetProperty(prop.Name);345                             propertyInfo.SetValue(obj, Convert.ChangeType(row[prop.Name], propertyInfo.PropertyType),346                                 null);347                         }348                         catch349                         {350                             ;351                         }352                     }353 354                     list.Add(obj);355                 }356 357                 return list;358             }359             catch360             {361                 return null;362             }363         }364 365         #endregion366 367         #region int类型比较368 369         public static bool Between<T>(this T me, T lower, T upper) where T : IComparable<T>370         {371             return me.CompareTo(lower) >= 0 && me.CompareTo(upper) < 0;372         }373 374         public static T Max<T>(T value1, T value2) where T : IComparable375         {376             return value1.CompareTo(value2) > 0 ? value1 : value2;377         }378 379         public static decimal PercentOf(this double position, int total)380         {381             decimal result = 0;382             if (position > 0 && total > 0)383                 result = (decimal) position/total*100;384             return result;385         }386 387         public static decimal? ToDecimal(this object obj)388         {389             decimal result = 0;390             if (obj == null) return null;391 392             if (decimal.TryParse(obj.ToString(), out result))393                 return result;394             return null;395         }396 397         #endregion398 399         #region 克隆一个对象400 401         /// <summary>402         ///     克隆一个对象403         /// </summary>404         /// <typeparam name="T"></typeparam>405         /// <param name="item"></param>406         /// <returns></returns>407         public static T Clone<T>(this object item)408         {409             if (item == null) return default(T);410             var formatter = new BinaryFormatter();411             var stream = new MemoryStream();412             formatter.Serialize(stream, item);413             stream.Seek(0, SeekOrigin.Begin);414             var result = (T) formatter.Deserialize(stream);415             stream.Close();416             return result;417         }418 419         #endregion420 421         #region 转换成指定类型的对象422 423         public static T To<T>(this IConvertible value)424         {425             try426             {427                 var t = typeof (T);428                 var u = Nullable.GetUnderlyingType(t);429 430                 if (u != null)431                 {432                     if (value =http://www.mamicode.com/= null || value.Equals(""))433                         return default(T);434 435                     return (T) Convert.ChangeType(value, u);436                 }437                 if (value =http://www.mamicode.com/= null || value.Equals(""))438                     return default(T);439 440                 return (T) Convert.ChangeType(value, t);441             }442 443             catch444             {445                 return default(T);446             }447         }448 449         #endregion450     }451 }