匿名类型的集合？ [英] Anonymous type collections?

问题描述

我要寻找的最佳实践创建匿名类型进行的募款活动。

I am looking for best practices for creating collections made from anonymous types.

有几种方法 - 这之一，大多数的答案在这个螺纹假设整个匿名收集可以在一条语句来构建。

There are several approaches - this one and most answers on this thread assume that the whole anonymous collection can be constructed in one statement.

作为匿名类型通常用于替换类要被用来存储临时（如提出在<一href="http://stackoverflow.com/questions/48668/how-should-anonymous-types-be-used-in-c/48705#48705">this SO回答），我想，以避免创建和使用类匿名收藏，为的这个帖子建议。

As anonymous types are usually used to replace classes that are to be used to store temporary (as put forward in this SO answer), I would like to avoid creating and using a class for anonymous collections, as this post suggests.

在我的情况，我遍历集合 - 对于集合中的每个项目我想收集相关对象在一个匿名类型（作为一个元组）。我需要这些匿名类型被放在一个集合，然后对其进行排序为进一步开展工作。

In my case, I am iterating over a collection - for each item in the collection I would like to collect related objects in an anonymous type (acting as a tuple). I need these anonymous types to be put in a collection and then sort them for further work.

其他的方法我已经考虑：

Other approaches I have considered:

1. 使用一个Object []或ArrayList中（失去匿名类型的利益）
2. 创建为必需项目的包装类（不再需要匿名类型）

这是我在code中的唯一的地方，我需要这样一个集合 - 这将是最好的办法。

This is the only place in my code that I need such a collection - what would be the best approach?

补充说明：

我正与传统的.NET 1.1中的对象，所以我有工作的集合是强类型集合实现IEnumerable的，因此大多数的LINQ扩展方法等。选择是行不通的：

I am working with legacy .Net 1.1 objects, so the collections I am working with are strongly typed collections implementing IEnumerable, and as such most Linq extension methods such as .Select won't work:

code样品

foreach (Item item in myItems)
{
	foreach (Confirmation confirmation in item.GetConfirmations(true))
	{
		if (lastParentId != item.ParentId)
		{
			lastParentId = item.ParentId;
			parentObject = new ParentItem(lastParentId);
		}

		itemHolder = new ArrayList { item, confirmation };
		if (parentObject!= null)
		{
		    itemHolder.Add(parentObject.Rate);
		}

    	sortConfirmations.Add(confirmation.Date, itemHolder);
    }
}

// Use sortConfirmations

分辨率

我结束了使用一个通用的字典，收集相关的物品放在一起，并使用.OrderBy（）对它们进行排序 - 丑陋，但它的工作原理......而且比现有code更好

I ended up using a generic dictionary to collect the related items together and using .OrderBy() to sort them - ugly, but it works... and is better than the existing code.

推荐答案

对于一个非常不同的答案...... LINQ？

For a very different answer... LINQ?

在我的情况，我遍历一个   收集 - 在每个项目   收藏我要收藏   在一个匿名类型相关对象   （作为一个元组）。我需要这些   匿名类型被放在一个   集合，然后排序他们   进一步的工作。

In my case, I am iterating over a collection - for each item in the collection I would like to collect related objects in an anonymous type (acting as a tuple). I need these anonymous types to be put in a collection and then sort them for further work.

这听起来像：

var list = (from item in collection
          from related in item.Relationship
          order by ...something...
          select new {item,related}).ToList()

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