(更新时间)2021年5月31日 商城高并发秒杀系统(.NET Core版) 16-AutoMapper帮助类的封装

一：AutoMapper帮助类的封装

/// <summary>
/// 对象自动转换工具类
/// </summary>
public static class AutoMapperHelper
{
    /// <summary>
    ///  类型映射,默认字段名字一一对应
    /// </summary>
    /// <typeparam name="TDestination"></typeparam>
    /// <param name="obj"></param>
    /// <returns></returns>
    public static TDestination AutoMapTo<TDestination>(this object obj)
    {
        if (obj == null) return default(TDestination);
        var config = new AutoMapper.MapperConfiguration(cfg => cfg.CreateMap(obj.GetType(), typeof(TDestination)));
        return config.CreateMapper().Map<TDestination>(obj);
    }

    /// <summary>
    /// 类型映射,可指定映射字段的配置信息
    /// </summary>
    /// <typeparam name="TSource">源数据：要被转化的实体对象</typeparam>
    /// <typeparam name="TDestination">目标数据：转换后的实体对象</typeparam>
    /// <param name="source">任何引用类型对象</param>
    /// <param name="cfgExp">可为null，则自动一一映射</param>
    /// <returns></returns>
    public static TDestination AutoMapTo<TSource, TDestination>(this TSource source, Action<AutoMapper.IMapperConfigurationExpression> cfgExp)
     where TDestination : class
     where TSource : class
    {
        if (source == null) return default(TDestination);
        var config = new AutoMapper.MapperConfiguration(cfgExp != null ? cfgExp : cfg => cfg.CreateMap<TSource, TDestination>());
        var mapper = config.CreateMapper();
        return mapper.Map<TDestination>(source);
    }
    /// <summary>
    /// 类型映射,默认字段名字一一对应
    /// </summary>
    /// <typeparam name="TSource">源数据：要被转化的实体对象</typeparam>
    /// <typeparam name="TDestination">目标数据：转换后的实体对象</typeparam>
    /// <param name="source">任何引用类型对象</param>
    /// <returns>转化之后的实体</returns>
    public static TDestination AutoMapTo<TSource, TDestination>(this TSource source)
        where TDestination : class
        where TSource : class
    {
        if (source == null) return default(TDestination);
        var config = new AutoMapper.MapperConfiguration(cfg => cfg.CreateMap<TSource, TDestination>());
        var mapper = config.CreateMapper();
        return mapper.Map<TDestination>(source);
    }
    /// <summary>
    /// 集合列表类型映射,默认字段名字一一对应
    /// </summary>
    /// <typeparam name="TDestination">转化之后的实体对象，可以理解为viewmodel</typeparam>
    /// <typeparam name="TSource">要被转化的实体对象，Entity</typeparam>
    /// <param name="source">通过泛型指定的这个扩展方法的类型，理论任何引用类型</param>
    /// <returns>转化之后的实体列表</returns>
    public static IEnumerable<TDestination> AutoMapTo<TSource, TDestination>(this IEnumerable<TSource> source)
        where TDestination : class
        where TSource : class
    {
        if (source == null) return new List<TDestination>();
        var config = new AutoMapper.MapperConfiguration(cfg => cfg.CreateMap<TSource, TDestination>());
        var mapper = config.CreateMapper();
        return mapper.Map<List<TDestination>>(source);
    }
}

  
 

  
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文章来源: codeboy.blog.csdn.net，作者：愚公搬代码，版权归原作者所有，如需转载，请联系作者。

原文链接：codeboy.blog.csdn.net/article/details/117409061