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  • C# 对象快速复制

        public static class TransExpV2<TIn, TOut>
        {
            private static readonly Func<TIn, TOut> cache = GetFunc();
            private static Func<TIn, TOut> GetFunc()
            {
                ParameterExpression parameterExpression = Expression.Parameter(typeof(TIn), "p");
                List<MemberBinding> memberBindingList = new List<MemberBinding>();
                foreach (var item in typeof(TOut).GetProperties())
                {
                    if (!item.CanWrite) continue;
                    if (typeof(TIn).GetProperty(item.Name) == null) 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());
                Expression<Func<TIn, TOut>> lambda = Expression.Lambda<Func<TIn, TOut>>(memberInitExpression, new ParameterExpression[] { parameterExpression });
                return lambda.Compile();
            }
    
            public static TOut Trans(TIn tIn)
            {
                return cache(tIn);
            }
        }

      看到一个好的方法保存下来以备用,原文地址:https://www.cnblogs.com/emrys5/p/expression_trans_model.html

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  • 原文地址:https://www.cnblogs.com/chengNet/p/11836536.html
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