本文整理匯總了C#中System.Linq.Enumerable.Count方法的典型用法代碼示例。如果您正苦於以下問題：C# Enumerable.Count方法的具體用法？C# Enumerable.Count怎麽用？C# Enumerable.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Enumerable.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: 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.");
}
}輸出：
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.");
}輸出：
There are 6 fruits in the collection.
示例3: Enumerable.Count()
//引入命名空間
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);
}
}