本文整理匯總了VB.NET中System.Linq.Queryable.Sum方法的典型用法代碼示例。如果您正苦於以下問題：VB.NET Queryable.Sum方法的具體用法？VB.NET Queryable.Sum怎麽用？VB.NET Queryable.Sum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Queryable.Sum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VB.NET代碼示例。
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)輸出：
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)輸出：
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輸出：
The total weight of the packages is: 83.7