在.NET 2.0/VB.NET中使用谓词对List(Of structure)中的项目进行计数 [英] Count items in List(Of structure) using predicate in .NET 2.0/VB.NET

问题描述

我需要计算.NET 2.0中 List(Of Structure)中符合条件的项目.例如:

I need to count the items that meet a criteria in a List(Of Structure) in .NET 2.0. For example:

Dim listcars as New List(Of car)

Structure car
   Dim Name as String
   Dim year as Integer
End structure

现在我需要计算所有名称为Toyota等的汽车.我该怎么做?

Now I need to count all cars with name Toyota, etc.. How do I do it?

推荐答案

您要 List.LongCount .

Dim CarList As New List(Of Car)
Dim Model As String = "Toyota"
Dim ToyotaCount As Long = CarList.LongCount(Function(car) car.Name = Model)

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