本文整理汇总了C#中System.Linq.Enumerable.Count方法的典型用法代码示例。如果您正苦于以下问题：C# Enumerable.Count方法的具体用法？C# Enumerable.Count怎么用？C# Enumerable.Count使用的例子？那么, 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Enumerable.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: CountEx2
class Pet
{
public string Name { get; set; }
public bool Vaccinated { get; set; }
}
public static void CountEx2()
{
Pet[] pets = { new Pet { Name="Barley", Vaccinated=true },
new Pet { Name="Boots", Vaccinated=false },
new Pet { Name="Whiskers", Vaccinated=false } };
try
{
int numberUnvaccinated = pets.Count(p => p.Vaccinated == false);
Console.WriteLine("There are {0} unvaccinated animals.", numberUnvaccinated);
}
catch (OverflowException)
{
Console.WriteLine("The count is too large to store as an Int32.");
Console.WriteLine("Try using the LongCount() method instead.");
}
}输出：
There are 2 unvaccinated animals.
示例2: catch
string[] fruits = { "apple", "banana", "mango", "orange", "passionfruit", "grape" };
try
{
int numberOfFruits = fruits.Count();
Console.WriteLine(
"There are {0} fruits in the collection.",
numberOfFruits);
}
catch (OverflowException)
{
Console.WriteLine("The count is too large to store as an Int32.");
Console.WriteLine("Try using the LongCount() method instead.");
}输出：
There are 6 fruits in the collection.
示例3: Enumerable.Count()
//引入命名空间
using System;
using System.Collections.Generic;
using System.Linq;
static class TestString {
static void Main() {
var count =
"abc 8"
.Where(c => !Char.IsLetter(c))
.Count();
Console.WriteLine(count);
}
}