NetCore AutoMapper的封装

丈夫欲遂平生志，一载寒窗一举汤。这篇文章主要讲述NetCore AutoMapper的封装相关的知识，希望能为你提供帮助。

//需要引用AutoMapper的Nuget包

/// < summary> /// 对象映射 /// < /summary> public static class Extensions { /// < summary> /// 同步锁 /// < /summary> private static readonly object Sync = new object(); /// < summary> /// 将源对象映射到目标对象 /// < /summary> /// < typeparam name="TSource"> 源类型< /typeparam> /// < typeparam name="TDestination"> 目标类型< /typeparam> /// < param name="source"> 源对象< /param> /// < param name="destination"> 目标对象< /param> public static TDestination MapTo< TSource, TDestination> (this TSource source, TDestination destination) { return MapTo< TDestination> (source, destination); }/// < summary> /// 将源对象映射到目标对象 /// < /summary> /// < typeparam name="TDestination"> 目标类型< /typeparam> /// < param name="source"> 源对象< /param> public static TDestination MapTo< TDestination> (this object source) where TDestination : new() { return MapTo(source, new TDestination()); }/// < summary> /// 将源对象映射到目标对象 /// < /summary> private static TDestination MapTo< TDestination> (object source, TDestination destination) { if (source == null) throw new ArgumentNullException(nameof(source)); if (destination == null) throw new ArgumentNullException(nameof(destination)); var sourceType = GetType(source); var destinationType = GetType(destination); var map = GetMap(sourceType, destinationType); if (map != null) return Mapper.Map(source, destination); lock (Sync) { map = GetMap(sourceType, destinationType); if (map != null) return Mapper.Map(source, destination); InitMaps(sourceType, destinationType); } return Mapper.Map(source, destination); }/// < summary> /// 获取类型 /// < /summary> private static Type GetType(object obj) { var type = obj.GetType(); if ((obj is System.Collections.IEnumerable) == false) return type; if (type.IsArray) return type.GetElementType(); var genericArgumentsTypes = type.GetTypeInfo().GetGenericArguments(); if (genericArgumentsTypes == null || genericArgumentsTypes.Length == 0) throw new ArgumentException("泛型类型参数不能为空"); return genericArgumentsTypes[0]; }/// < summary> /// 获取映射配置 /// < /summary> private static TypeMap GetMap(Type sourceType, Type destinationType) { try { return Mapper.Configuration.FindTypeMapFor(sourceType, destinationType); } catch (InvalidOperationException) { lock (Sync) { try { return Mapper.Configuration.FindTypeMapFor(sourceType, destinationType); } catch (InvalidOperationException) { InitMaps(sourceType, destinationType); } return Mapper.Configuration.FindTypeMapFor(sourceType, destinationType); } } }/// < summary> /// 初始化映射配置 /// < /summary> private static void InitMaps(Type sourceType, Type destinationType) { try { var maps = Mapper.Configuration.GetAllTypeMaps(); Mapper.Initialize(config => { ClearConfig(); foreach (var item in maps) config.CreateMap(item.SourceType, item.DestinationType); config.CreateMap(sourceType, destinationType); }); } catch (InvalidOperationException) { Mapper.Initialize(config => { config.CreateMap(sourceType, destinationType); }); } }/// < summary> /// 清空配置 /// < /summary> private static void ClearConfig() { var typeMapper = typeof(Mapper).GetTypeInfo(); var configuration = typeMapper.GetDeclaredField("_configuration"); configuration.SetValue(null, null, BindingFlags.Static, null, CultureInfo.CurrentCulture); }/// < summary> /// 将源集合映射到目标集合 /// < /summary> /// < typeparam name="TDestination"> 目标元素类型,范例：Sample,不要加List< /typeparam> /// < param name="source"> 源集合< /param> public static List< TDestination> MapToList< TDestination> (this System.Collections.IEnumerable source) { return MapTo< List< TDestination> > (source); } }

【NetCore AutoMapper的封装】