linq sum问题
各位大虾 在vb.net中 如何用linq对某个字段求sum
[最优解释]

Sum - Simple
This sample uses Sum to find the total freight over all Orders.

Public Sub LinqToSqlCount03()
    Dim q = (From o In db.Orders _
        Select o.Freight).Sum()

    Console.WriteLine(q)
End Sub


Result:
64914.4400

Sum - Mapped
This sample uses Sum to find the total number of units on order over all Products.

Public Sub LinqToSqlCount04()
    Dim q = (From p In db.Products _
        Select CInt(p.UnitsOnOrder.Value)).Sum()

    Console.WriteLine(q)
End Sub


Result:
780

http://msdn.microsoft.com/en-us/vstudio/bb737922
[其他解释]
VB.NET

Dim result = data.Sum(Function(x) x.求和的字段)

[其他解释]
var result = data.Sum(x => x.求和的字段);
[其他解释]


给个例子给你http://msdn.microsoft.com/zh-cn/library/system.linq.enumerable.sum.aspx
[其他解释]

引用:

Visual Basic code123456789101112131415161718192021222324252627Sum - SimpleThis sample uses Sum to find the total freight over all Orders. Public Sub LinqToSqlCount03() Dim q = (From o ……

这个
[其他解释]
linq的语法到哪边都一样