Calculate Remaining Inventory Of DataGrid
Sep 21, 2010
Date Used
QtyUsed A
09/01/10
5
09/15/10
6
PurchaseDate
QtyPurchase
QtyUsed
QtyOnHand
07/01/10
8
11
-3
08/09/10
9
I have two datagrids, one show Item purchase and the other Usage. I have total the QtyUsed column which I place the total on the 1st row as 11, I would like it to show 8 and show the reminder on the next row and calculate the QtyonHand. Below is the code I've tried and in work but I, think I need to kind of loop to drop to the next row. I had to place the number 1 for i to get the second row, but there may be many more rows. Not sure this is clear.
Private Function Qused()
As Double
'Usage(QtyUsed)
Dim QU As
Double = 0
[Code] .....
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Calculate Values On Datagrid?[code]...
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Just a bit of an issue that we're trying to resolve here. Assuming We're implementing a business model as one dll and a data access layer as another dll. We want them to be de-coupled so we implement an interface for the data-access layer. Great, we could now swap out the data access layer and, as long as the new data access layer fulfils the interface we're good to go, right?
Except we're not. In the business model we need to insanciate the data access layer and, because you can't instanciate an interface, you have to instanciate the actual class. We need to know the name space and the class name.We're going to end up with a line of code somewhere in our business model that looks something like this:-
Dim test as iDataLayer
test = new namespace.DataLayer
Basically, we can declare test as an iDataLayer (the interface) but to instanciate it we need to refer to the actual class (DataLayer). So we haven't really removed the coupling. If we want to swap out the data layer for a different implementation with a possibly different class name or namespace then we need to ammend the code in the business model. We're trying to avoid that.
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Private Sub btnCalculateAge_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCalculateAge.Click
Dim currentDate As Date
Dim BirthDate As Date
Dim Age As Long
[CODE]
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Desired Results (example):
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(this is a work in progress...)
[Code].....
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[Code]...
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[Code]...
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