强制转化常用函数 

  1     {
  2         #region 强制转化
  3         /// <summary>
  4         /// object转化为Bool类型
  5         /// </summary>
  6         /// <param name="obj"></param>
  7         /// <returns></returns>
  8         public static bool ObjToBool(this object obj)
  9         {
 10             bool flag;
 11             if (obj == null)
 12             {
 13                 return false;
 14             }
 15             if (obj.Equals(DBNull.Value))
 16             {
 17                 return false;
 18             }
 19             return (bool.TryParse(obj.ToString(), out flag) && flag);
 20         }
 21         /// <summary>
 22         /// object强制转化为DateTime类型(吃掉异常)
 23         /// </summary>
 24         /// <param name="obj"></param>
 25         /// <returns></returns>
 26         public static DateTime? ObjToDateNull(this object obj)
 27         {
 28             if (obj == null)
 29             {
 30                 return null;
 31             }
 32             try
 33             {
 34                 return new DateTime?(Convert.ToDateTime(obj));
 35             }
 36             catch (ArgumentNullException ex)
 37             {
 38                 return null;
 39             }
 40         }
 41         /// <summary>
 42         /// int强制转化
 43         /// </summary>
 44         /// <param name="obj"></param>
 45         /// <returns></returns>
 46         public static int ObjToInt(this object obj)
 47         {
 48             if (obj != null)
 49             {
 50                 int num;
 51                 if (obj.Equals(DBNull.Value))
 52                 {
 53                     return 0;
 54                 }
 55                 if (int.TryParse(obj.ToString(), out num))
 56                 {
 57                     return num;
 58                 }
 59             }
 60             return 0;
 61         }
 62         /// <summary>
 63         /// 强制转化为long
 64         /// </summary>
 65         /// <param name="obj"></param>
 66         /// <returns></returns>
 67         public static long ObjToLong(this object obj)
 68         {
 69             if (obj != null)
 70             {
 71                 long num;
 72                 if (obj.Equals(DBNull.Value))
 73                 {
 74                     return 0;
 75                 }
 76                 if (long.TryParse(obj.ToString(), out num))
 77                 {
 78                     return num;
 79                 }
 80             }
 81             return 0;
 82         }
 83         /// <summary>
 84         /// 强制转化可空int类型
 85         /// </summary>
 86         /// <param name="obj"></param>
 87         /// <returns></returns>
 88         public static int? ObjToIntNull(this object obj)
 89         {
 90             if (obj == null)
 91             {
 92                 return null;
 93             }
 94             if (obj.Equals(DBNull.Value))
 95             {
 96                 return null;
 97             }
 98             return new int?(ObjToInt(obj));
 99         }
100         /// <summary>
101         /// 强制转化为string
102         /// </summary>
103         /// <param name="obj"></param>
104         /// <returns></returns>
105         public static string ObjToStr(this object obj)
106         {
107             if (obj == null)
108             {
109                 return "";
110             }
111             if (obj.Equals(DBNull.Value))
112             {
113                 return "";
114             }
115             return Convert.ToString(obj);
116         }
117         /// <summary>
118         /// Decimal转化
119         /// </summary>
120         /// <param name="obj"></param>
121         /// <returns></returns>
122         public static decimal ObjToDecimal(this object obj)
123         {
124             if (obj == null)
125             {
126                 return 0M;
127             }
128             if (obj.Equals(DBNull.Value))
129             {
130                 return 0M;
131             }
132             try
133             {
134                 return Convert.ToDecimal(obj);
135             }
136             catch
137             {
138                 return 0M;
139             }
140         }
141         /// <summary>
142         /// Decimal可空类型转化
143         /// </summary>
144         /// <param name="obj"></param>
145         /// <returns></returns>
146         public static decimal? ObjToDecimalNull(this object obj)
147         {
148             if (obj == null)
149             {
150                 return null;
151             }
152             if (obj.Equals(DBNull.Value))
153             {
154                 return null;
155             }
156             return new decimal?(ObjToDecimal(obj));
157         } 
158         #endregion
159 
160     }

 

posted @ 2016-09-22 16:47  百年明日能几何  阅读(263)  评论(0)    收藏  举报