本文整理匯總了VB.NET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：VB.NET Enumerable.Count方法的具體用法？VB.NET Enumerable.Count怎麽用？VB.NET 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2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VB.NET代碼示例。
示例1: fruits
' Create an array of strings.
Dim fruits() As String = {"apple", "banana", "mango", "orange", "passionfruit", "grape"}
Try
' Count the number of items in the array.
Dim numberOfFruits As Integer = fruits.Count()
' Display the output.
Console.WriteLine($"There are {numberOfFruits} fruits in the collection.")
Catch e As OverflowException
Console.WriteLine("The count is too large to store as an Int32. Try using LongCount() instead.")
End Try輸出：
There are 6 fruits in the collection.
示例2: pets
Structure Pet
Public Name As String
Public Vaccinated As Boolean
End Structure
Public Shared Sub CountEx2()
' Create an array of Pet objects.
Dim pets() As Pet = {New Pet With {.Name = "Barley", .Vaccinated = True},
New Pet With {.Name = "Boots", .Vaccinated = False},
New Pet With {.Name = "Whiskers", .Vaccinated = False}}
Try
' Count the number of Pets in the array where the Vaccinated property is False.
Dim numberUnvaccinated As Integer =
pets.Count(Function(p) p.Vaccinated = False)
' Display the output.
Console.WriteLine($"There are {numberUnvaccinated} unvaccinated animals.")
Catch e As OverflowException
Console.WriteLine("The count is too large to store as an Int32. Try using LongCount() instead.")
End Try
End Sub輸出：
There are 2 unvaccinated animals.