AutoMapper封装类

 /// <summary>
     /// AutoMapper扩展帮助类
     /// </summary>
     public static class AutoMapperHelper
     {
         /// <summary>
         ///  类型映射
         /// </summary>
         public static T MapTo<T>(this object obj)
         {
             if (obj == null) return default(T);
             Mapper.CreateMap(obj.GetType(), typeof(T));
             return Mapper.Map<T>(obj);
         }
         /// <summary>
         /// 集合列表类型映射
         /// </summary>
         public static List<TDestination> MapToList<TDestination>(this IEnumerable source)
         {
             foreach (var first in source)
             {
                 var type = first.GetType();
                 Mapper.CreateMap(type, typeof(TDestination));
                 break;
             }
             return Mapper.Map<List<TDestination>>(source);
         }
         /// <summary>
         /// 集合列表类型映射
         /// </summary>
         public static List<TDestination> MapToList<TSource, TDestination>(this IEnumerable<TSource> source)
         {
             //IEnumerable<T> 类型需要创建元素的映射
             Mapper.CreateMap<TSource, TDestination>();
             return Mapper.Map<List<TDestination>>(source);
         }
         /// <summary>
         /// 类型映射
         /// </summary>
         public static TDestination MapTo<TSource, TDestination>(this TSource source, TDestination destination)
             where TSource : class
             where TDestination : class
         {
            if (source == null) return destination;
             Mapper.CreateMap<TSource, TDestination>();
             return Mapper.Map(source, destination);
         }
         /// <summary>
         /// DataReader映射
         /// </summary>
         public static IEnumerable<T> DataReaderMapTo<T>(this IDataReader reader)
         {
             Mapper.Reset();
             Mapper.CreateMap<IDataReader, IEnumerable<T>>();
             return Mapper.Map<IDataReader, IEnumerable<T>>(reader);
         }
     }
 }