Solved

How do I sum data by month/YYYY in VB code in VS2010?

Posted on 2011-03-01
2
223 Views
Last Modified: 2012-05-11
Hello:

I would like to sum the total of several columns by each month based upon a user selected date range.  

This is what I have so far:

HERE I GRAB ALL THE DATES AVAILABLE IN THE DATE RANGE
----------------------------------------------------------------------------------
Dim dateList = From id In wellData.tblBWgallons _
                         Where id.InputDate >= CDate(pckrStartDate.Text) _
                         AndAlso id.InputDate <= CDate(pckrEndDate.Text) _
                         AndAlso id.Cumulative > 0 _
                         Order By id.InputDate Ascending _
                         Select id.InputDate

HERE I MAKE A LIST  BY M/YYYY
--------------------------------------------------------------
        Dim MonthList As New List(Of String)

        For Each m As Date In dateList
            Dim mon As String = CStr(m.Month)
            Dim YY As String = CStr(m.Year)
            Dim DateName As String = mon & "/" & YY

            If Not MonthList.Contains(DateName) Then
                MonthList.Add(DateName)
            Else
                'do nothing
            End If
        Next

PROBLEM AREA - I CAN'T FIGURE OUT HOW TO GRAB THE DATA BY THE LIST
-------------------------------------------------------------------------------------------------

        For Each rec In MonthList
            Dim mmyy As String = rec  (EXAMPLE mmyy would be 3/2010)

            Dim getRecords = Aggregate id In wellData.tblBWgallons _
                             Where CDate(id.InputDate.Value.ToString("m/yyyy")) = mmyy _
                             Into Sum(id.Cumulative)

        Next

Any help would be most appreciated!  
0
Comment
Question by:Karen Wilson
  • 2
2 Comments
 

Accepted Solution

by:
Karen Wilson earned 0 total points
ID: 35008924
I got it...  Had to flip each record in the MonthList back to a date.

For Each rec In MonthList

            Dim mmyy As Date = rec
            Dim m As String = mmyy.Month
            Dim y As String = mmyy.Year


            Dim getRecords = Aggregate id In wellData.tblBWgallons _
                             Where CDate(id.InputDate.Value).Month = m _
                             And CDate(id.InputDate.Value).Year = y _
                             Into Sum(id.Cumulative)

        Next

0
 

Author Closing Comment

by:Karen Wilson
ID: 35008935
I figured it out myself....  after reading my own question!!
0

Featured Post

Free Tool: Subnet Calculator

The subnet calculator helps you design networks by taking an IP address and network mask and returning information such as network, broadcast address, and host range.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Exit the loop 4 49
Need help making a program or form for inventory that exports to txt 8 43
vb.net 1 month apart 11 35
Passing data between Forms 3 20
This article explains how to create and use a custom WaterMark textbox class.  The custom WaterMark textbox class allows you to set the WaterMark Background Color and WaterMark text at design time.   IMAGE OF WATERMARKS STEPS Create VB …
The ECB site provides FX rates for major currencies since its inception in 1999 in the form of an XML feed. The files have the following format (reducted for brevity) (CODE) There are three files available HERE (http://www.ecb.europa.eu/stats/exch…
Although Jacob Bernoulli (1654-1705) has been credited as the creator of "Binomial Distribution Table", Gottfried Leibniz (1646-1716) did his dissertation on the subject in 1666; Leibniz you may recall is the co-inventor of "Calculus" and beat Isaac…

856 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question