VB.NET Queryable.Count方法代码示例

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本文整理汇总了VB.NET中System.Linq.Queryable.Count方法的典型用法代码示例。如果您正苦于以下问题：VB.NET Queryable.Count方法的具体用法？VB.NET Queryable.Count怎么用？VB.NET Queryable.Count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.Count方法的2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，您的评价将有助于我们的系统推荐出更棒的VB.NET代码示例。

示例1: fruits

Dim fruits() As String = {"apple", "banana", "mango", _
                    "orange", "passionfruit", "grape"}

Dim numberOfFruits As Integer = fruits.AsQueryable().Count()

MsgBox(String.Format( _
    "There are {0} items in the array.", _
    numberOfFruits))

开发者ID:VB.NET开发者，项目名称:System.Linq，代码行数:8，代码来源:Queryable.Count

输出：

There are 6 items in the array.

示例2: pets

Structure Pet
    Public Name As String
    Public Vaccinated As Boolean
End Structure

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}}

    ' Count the number of unvaccinated pets in the array.
    Dim numberUnvaccinated As Integer = pets.AsQueryable().Count(Function(p) p.Vaccinated = False)

    MsgBox(String.Format("There are {0} unvaccinated animals.", numberUnvaccinated))
End Sub

开发者ID:VB.NET开发者，项目名称:System.Linq，代码行数:16，代码来源:Queryable.Count

输出：