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  • 表达式树转换对象

    public static class Expression2Object<TIn, TOut>
    {
        private static readonly Func<TIn, TOut> cache = GetFunc();
        private static Func<TIn, TOut> GetFunc()
        {
            ParameterExpression parameterExpression = Expression.Parameter(typeof(TIn), "obj");
            List<MemberBinding> memberBindingList = new List<MemberBinding>();
            foreach (var item in typeof(TOut).GetProperties())
            {
                if (!item.CanWrite)
                {
                    continue;
                }
                MemberExpression property = Expression.Property(parameterExpression, typeof(TIn).GetProperty(item.Name));
                MemberBinding memberBinding = Expression.Bind(item, property);
                memberBindingList.Add(memberBinding);
            }
            MemberInitExpression memberinitExpression = Expression.MemberInit(Expression.New(typeof(TOut)), memberBindingList.ToArray());
            var expression = Expression.Lambda<Func<TIn, TOut>>(memberinitExpression, new ParameterExpression[] { parameterExpression });
            return expression.Compile();
        }
        public static TOut Convert(TIn tin)
        {
            return cache(tin);
        }
    }
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  • 原文地址:https://www.cnblogs.com/zhesong/p/e2outil.html
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