本文整理匯總了C#中System.Linq.Queryable.Count方法的典型用法代碼示例。如果您正苦於以下問題：C# Queryable.Count方法的具體用法？C# Queryable.Count怎麽用？C# Queryable.Count使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。
在下文中一共展示了Queryable.Count方法的3個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的C#代碼示例。
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);輸出：
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);
}輸出：
There are 2 unvaccinated animals.
示例3: Queryable.Count()
//引入命名空間
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);
}
}