本文整理汇总了C#中System.Linq.Queryable.Count方法的典型用法代码示例。如果您正苦于以下问题：C# Queryable.Count方法的具体用法？C# Queryable.Count怎么用？C# Queryable.Count使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。
在下文中一共展示了Queryable.Count方法的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1:
string[] fruits = { "apple", "banana", "mango",
"orange", "passionfruit", "grape" };
int numberOfFruits = fruits.AsQueryable().Count();
Console.WriteLine(
"There are {0} items in the array.",
numberOfFruits);输出：
There are 6 items in the array.
示例2: CountEx2
class Pet
{
public string Name { get; set; }
public bool Vaccinated { get; set; }
}
public static void CountEx2()
{
// Create an array of Pet objects.
Pet[] pets = { new Pet { Name="Barley", Vaccinated=true },
new Pet { Name="Boots", Vaccinated=false },
new Pet { Name="Whiskers", Vaccinated=false } };
// Count the number of unvaccinated pets in the array.
int numberUnvaccinated =
pets.AsQueryable().Count(p => p.Vaccinated == false);
Console.WriteLine(
"There are {0} unvaccinated animals.",
numberUnvaccinated);
}输出：
There are 2 unvaccinated animals.
示例3: Queryable.Count()
//引入命名空间
using System;
using System.Linq;
using System.Collections;
using System.Collections.Generic;
public class MainClass {
public static void Main() {
string[] presidents = {"G", "H", "a", "H", "over", "Jack"};
int count = presidents.Count();
Console.WriteLine(count);
}
}