本文整理汇总了C#中System.Linq.Queryable.LongCount方法的典型用法代码示例。如果您正苦于以下问题：C# Queryable.LongCount方法的具体用法？C# Queryable.LongCount怎么用？C# Queryable.LongCount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.LongCount方法的4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" };
long count = fruits.AsQueryable().LongCount();
Console.WriteLine("There are {0} fruits in the collection.", count);输出：
There are 6 fruits in the collection.
示例2: LongCountEx2
class Pet
{
public string Name { get; set; }
public int Age { get; set; }
}
public static void LongCountEx2()
{
Pet[] pets = { new Pet { Name="Barley", Age=8 },
new Pet { Name="Boots", Age=4 },
new Pet { Name="Whiskers", Age=1 } };
const int Age = 3;
// Count the number of Pet objects where Pet.Age is greater than 3.
long count = pets.AsQueryable().LongCount(pet => pet.Age > Age);
Console.WriteLine("There are {0} animals over age {1}.", count, Age);
}输出：
There are 2 animals over age 3.
示例3: Queryable.LongCount()
//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() {
long count = Enumerable.Range(0, int.MaxValue).Concat(Enumerable.Range(0, int.MaxValue)).LongCount();
Console.WriteLine(count);
}
}示例4: Queryable.LongCount(filter)
//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() {
long count = Enumerable.Range(0, int.MaxValue).
Concat(Enumerable.Range(0, int.MaxValue)).LongCount(n => n > 1 && n < 4);
Console.WriteLine(count);
}
}