DataSet转化为实体集合类

 1 /// <summary> 2         /// DataSet转换为实体类 3         /// </summary> 4         /// <typeparam name="T">实体类</typeparam> 5         /// <param name="p_DataSet">DataSet</param> 6         /// <param name="p_TableIndex">待转换数据表索引</param> 7         /// <returns>实体类</returns> 8         public static T DataSetToEntity<T>(DataSet p_DataSet, int p_TableIndex) 9         {10             if (p_DataSet == null || p_DataSet.Tables.Count < 0)11                 return default(T);12             if (p_TableIndex > p_DataSet.Tables.Count - 1)13                 return default(T);14             if (p_TableIndex < 0)15                 p_TableIndex = 0;16             if (p_DataSet.Tables[p_TableIndex].Rows.Count <= 0)17                 return default(T);18 19             DataRow p_Data = p_DataSet.Tables[p_TableIndex].Rows[0];20             // 返回值初始化21             T _t = (T)Activator.CreateInstance(typeof(T));22             PRopertyInfo[] propertys = _t.GetType().GetProperties();23             foreach (PropertyInfo pi in propertys)24             {25                 if (p_DataSet.Tables[p_TableIndex].Columns.IndexOf(pi.Name.ToUpper()) != -1 && p_Data[pi.Name.ToUpper()] != DBNull.Value)26                 {27                     pi.SetValue(_t, p_Data[pi.Name.ToUpper()], null);28                 }29                 else30                 {31                     pi.SetValue(_t, null, null);32                 }33             }34             return _t;35         }36 37         /// <summary>38         /// DataSet转换为实体列表39         /// </summary>40         /// <typeparam name="T">实体类</typeparam>41         /// <param name="p_DataSet">DataSet</param>42         /// <param name="p_TableIndex">待转换数据表索引</param>43         /// <returns>实体类列表</returns>44         public static IList<T> DataSetToEntityList<T>(DataSet p_DataSet, int p_TableIndex)45         {46             if (p_DataSet == null || p_DataSet.Tables.Count < 0)47                 return default(IList<T>);48             if (p_TableIndex > p_DataSet.Tables.Count - 1)49                 return default(IList<T>);50             if (p_TableIndex < 0)51                 p_TableIndex = 0;52             if (p_DataSet.Tables[p_TableIndex].Rows.Count <= 0)53                 return default(IList<T>);54 55             DataTable p_Data = p_DataSet.Tables[p_TableIndex];56             // 返回值初始化57             IList<T> result = new List<T>();58             for (int j = 0; j < p_Data.Rows.Count; j++)59             {60                 T _t = (T)Activator.CreateInstance(typeof(T));61                 PropertyInfo[] propertys = _t.GetType().GetProperties();62                 foreach (PropertyInfo pi in propertys)63                 {64                     if (p_Data.Columns.IndexOf(pi.Name.ToUpper()) != -1 && p_Data.Rows[j][pi.Name.ToUpper()] != DBNull.Value)65                     {66                         pi.SetValue(_t, p_Data.Rows[j][pi.Name.ToUpper()], null);67                     }68                     else69                     {70                         pi.SetValue(_t, null, null);71                     }72                 }73                 result.Add(_t);74             }75             return result;76         }