本文整理汇总了VB.NET中System.Linq.Queryable.Sum方法的典型用法代码示例。如果您正苦于以下问题：VB.NET Queryable.Sum方法的具体用法？VB.NET Queryable.Sum怎么用？VB.NET Queryable.Sum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.Sum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VB.NET代码示例。
示例1: List
Dim numbers As New List(Of Single)(New Single() {43.68F, 1.25F, 583.7F, 6.5F})
Dim sum As Single = numbers.AsQueryable().Sum()
MsgBox("The sum of the numbers is " & sum)输出：
The sum of the numbers is 635.13.
示例2: Nullable
Dim points As Nullable(Of Single)() = {Nothing, 0, 92.83F, Nothing, 100.0F, 37.46F, 81.1F}
Dim sum As Nullable(Of Single) = points.AsQueryable().Sum()
MsgBox("Total points earned: " & sum)输出：
Total points earned: 311.39
示例3: List
Structure Package
Public Company As String
Public Weight As Double
End Structure
Shared Sub SumEx3()
Dim packages As New List(Of Package)(New Package() { _
New Package With {.Company = "Coho Vineyard", .Weight = 25.2}, _
New Package With {.Company = "Lucerne Publishing", .Weight = 18.7}, _
New Package With {.Company = "Wingtip Toys", .Weight = 6.0}, _
New Package With {.Company = "Adventure Works", .Weight = 33.8}})
' Calculate the sum of all package weights.
Dim totalWeight As Double = packages.AsQueryable().Sum(Function(pkg) pkg.Weight)
MsgBox("The total weight of the packages is: " & totalWeight)
End Sub输出：
The total weight of the packages is: 83.7