将填充的POCO合并为单个POCO

本文介绍了将填充的POCO合并为单个POCO的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我有一系列产品POCO。填充了一些数据，可用于识别独特的产品。其他字段，例如PriceA和PriceB被分成几个实例：

// 只是我所拥有的一个例子 产品A1 = new 产品{Name = A，PriceA = 1 。 29 ，PriceB = 0 ，Desc = null }; 产品A2 = new 产品{Name = A，PriceA = 0 ，PriceB = 1 。 39 ，Desc = null }; 产品A2 = new 产品{Name = A，PriceA = 0 ，PriceB = 0 ，Desc = ProductA};

我希望能够将这些合并为一个：

产品A1 = 新产品{Name = ，PriceA = 1 。 29 ，PriceB = 1 。 39 ，Desc = ProductA};

有一种聪明的Linq方法吗？ 到目前为止我所拥有的：

// 只是一个mo ck up。我真正的GroupBy产品有大约10个标识属性和两倍的细节要合并： var products = ImportProducts（）; var groups = products.GroupBy（p => new Product {Name = p.Name}）; // 然后我想我可以从每个项目中获取值？ 产品组。选择（g = > { var result = g.Key; result.PriceA = g.Max（p => p.PriceA）; result.PriceB = g.Max（p => p.PriceB）; result.Desc = g.FirstOrDefault（p =>！string.isNullorEmpty（p.Desc））。Desc; return result; }）;

还有更好的办法吗？ 谢谢 Andy

解决方案

嗯......你可以作弊！ ：笑：

产品A1 = 新产品{Name = A，PriceA = 1 。 29 ，PriceB = 0 ，Desc = null }; 产品A2 = new 产品{Name = A，PriceA = 0 ，PriceB = 1 。 39 ，Desc = null }; 产品A3 = new 产品{Name = A，PriceA = 0 ，PriceB = 0 ，Desc = ProductA}; var products = new 列表< Product>（）{A1，A2，A3}; var groups = products.GroupBy（p = > p.Name）。选择（g = > new 产品{Name = g.Key， PriceA = g.Max（v = > v.PriceA）， PriceB = g.Max（v = > v.PriceB）， Desc = g.Max（v = > v.Desc）}）;

Hi, I have an array of product POCOs. Some data is populated and can be used to identify unique products. Other fields, such as PriceA and PriceB are slit out into a couple of instances:

//Just an example of what I have Product A1 = new Product{Name = "A", PriceA = 1.29, PriceB = 0, Desc = null}; Product A2 = new Product{Name = "A", PriceA = 0, PriceB = 1.39, Desc = null}; Product A2 = new Product{Name = "A", PriceA = 0, PriceB = 0, Desc = "ProductA"};

I want to be able to consolidate these into one:

Product A1 = new Product{Name = "A", PriceA = 1.29, PriceB = 1.39, Desc = "ProductA"};

Is there a clever Linq way to do this? What I have so far:

//Just a mock up. My real GroupBy Product has about 10 identifying properties and twice as many details to consolidate: var products = ImportProducts(); var groups = products.GroupBy(p=>new Product{Name=p.Name}); //Then I guess I could get the values from each item? products groups.Select(g=>{ var result = g.Key; result.PriceA = g.Max(p=>p.PriceA); result.PriceB = g.Max(p=>p.PriceB); result.Desc = g.FirstOrDefault(p=>!string.isNullorEmpty(p.Desc)).Desc; return result; });

Is there a better way? Thanks Andy

解决方案

Um...you could cheat! :laugh:

Product A1 = new Product { Name = "A", PriceA = 1.29, PriceB = 0, Desc = null }; Product A2 = new Product { Name = "A", PriceA = 0, PriceB = 1.39, Desc = null }; Product A3 = new Product { Name = "A", PriceA = 0, PriceB = 0, Desc = "ProductA" }; var products = new List<Product>() { A1, A2, A3 }; var groups = products.GroupBy(p => p.Name) .Select(g => new Product { Name = g.Key, PriceA = g.Max(v => v.PriceA), PriceB = g.Max(v => v.PriceB), Desc = g.Max(v => v.Desc) });