C#对象列表，我如何获得一个属性的总和

C# List of objects, how do I get the sum of a property(C#对象列表，我如何获得一个属性的总和)

问题描述

我有一个对象列表.单个对象条目的一个属性是数量.如何获得金额的总和?

I have a list of objects. One property of the individual object entry is amount. How do I get the sum of amount?

如果我的列表是 double 类型，我可以这样做:

If my list was of type double I may be able to do something like this:

double total = myList.Sum();

但是我想要类似的东西，但是这个语法不正确.

However I want to something similar to this, yet this syntax is incorrect.

double total = myList.amount.Sum();

我应该如何去完成这个?如果可能的话，我希望使用 Sum 函数，而不是循环并计算值.

How should I go about accomplishing this? I would love to use the Sum function if possible instead of looping through and calculating the value.

推荐答案

using System.Linq;

...

double total = myList.Sum(item => item.Amount);

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