Summarize Data From One Datatable Into Another?
Nov 22, 2011
I've got a datatable not attached to the database. It contains essentially raw data. I want to take that raw data and then process it more by running a select statement that includes a couple of sums and group by phrase.However, I can't figure out how to run a select statement on a datatable that is already in RAM. I created Table 1 and massaged it by adding some more columns after pulling the original data. There will be more in the final SQL Statement but I can't get this to work.
Table 1 (works fine)
Customer, InvDate, Amount
Contains multiple records for the same customer.[code].....
This table should only be one record per customer showing total amount of all invoices.I've been searching the internet for a couple of days but no luck so far.
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Jun 5, 2012
I have a datatable that has a resource in one field and hours used in another, it looks like this -
Resource Hours Used
Manager 1
Accountant 1
Field Staff 2
Accountant 3
Manager 4
Manager 1
Administrator 6
Field Staff 4
Manager 0.5
Administrator 1
What I want to do is be able to create a summary of the data table above that groups multiple occurrences of a resource and adds up the hours used for that resource, creating a summary that looks like this -
Resource Hours Used
Manager 6.5
Accountant 4
Field Staff 6
Administrator 7
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Oct 4, 2011
In my datatable I have a single column containing a series of integer values. eg:-
1
2
3
1
2
2
2, etc
I am looking to do an equivalent of the following SQL statement :-
Select Value, Count(Value) as Total
From DataTable
Group By Value
Order by Value ASC
I'm looking to return the following from the above example :-
Value Total
1 2
2 4
3 1
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Sep 11, 2011
I need to summarize data from an arraylist in vb. For example, I have a list of dates with different times. I want to summarize the dates and be able to display the times when I click on each date.I am new to vb, and I am struggling with this. I am able to read the file(ofd) with this info but I can't get it summarize, instead I am showing the date multiple times.
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Mar 11, 2010
Let say I have an array of data. In this array, It has 4 Columns, represented as:
Column 1 = Customer #
Column 2 = Customer Name
Column 3 = Past Order #
Column 4 = Past Order Amount
Each Row in the Array represents a past order, so the array has no known upper limit. End result is that I need to report in my VB app, the number of Unique Customers, and by that Customer, summarize the number of orders, and the total amount of those orders.
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May 25, 2009
I am looking to produce an Excel report from an Access database table. The data contains numerous records with fields for Site, Country, Region, Type and a Resolution Time. My problem is that each month the Sites change so I need to be able to write VB code within Access to read the database table and output 'Site' records for that month, grouped together along with the incident details for that site, e.g. The report would have the following headings:
'SITE' 'COUNTRY' 'REGION' 'TYPE' 'TOTAL' 'RESOLVED<3DAYS' 'RESOLVED>3DAYS' 'NOT RESOLVED'
MEL AUS APAC TECHNICAL 78 40 31 7
MEL AUS APAC HARDWARE 49 40 8 1
LON GBR EURO HARDWARE 90 40 40 10
As I will have over 30 different sites and these may change each month how do I loop through the data identifying each site and its associated field values? I have used the following code to open the data and loop through records printing to excel, but am stuck at grouping by site:
Set rst = db.OpenRecordset(sqlStat)
row=10.......
..... Do While Not rst.EOF
.cells(row, 1).Value = rst.Fields(0)
.cells(row, 1).Value = rst.Fields(1)
.cells(row, 1).Value = rst.Fields(2)...
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Oct 31, 2010
how to copy data from datatable to table in dataset i ry this but its readonly property
ds.datatable1=newdt.copy
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Aug 10, 2011
I am updating a data table (dt_report_crypt) from an encrypted csv file in the code below:I decrypt the colums and update the same dreport_crypt, such that it will contain de-crypted data.This part is working wellI however need to use this de-crypted datatable as a data source to update a second table(dt_report), using the sql SELECT command to filter relevant data,
Dim dt_report As DataTable
Dim dt_report_crypt As DataTable
Using cn As
[code].....
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Apr 26, 2011
I have a bound datagridview in my code. I want to create a column to the right of each row that displays the sum of the values in the row.I've searched the net dilligently and have found nothing! Summarizing the columns is there, but not a row.
Oct Nov Dec Total
100 100 100 300
150 150 100 400
Etc....
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Mar 15, 2012
Been trying to figure out how to do this for a while, but I can't seem to find anything that exactly covers what I'm trying to do. I'm really a novice when it comes to vb .net, so this might be staring me in the face and I wouldn't know it.I've got a Motorola MC3090 mobile barcode scanner running Windows CE 5.0 at work. I wrote a small program (in .net 3.5) that allows me to scan barcodes and then get counts for specific barcodes when I type all or part of the barcode into an textbox. That works pretty well for receiving, but I need something that works better for the reverse process (shipping things out).
I have an textbox which accepts the barcodes. When the scanner emulates an enter key press, it adds the code to a listbox and clears the input field. This process loops as many times as my quantity field specifies. There's another textbox which I use to input partial barcodes that I want counts for. It looks for strings in the listbox that match, dumps them into a second hidden listbox, and counts those.
If you're the tl;dr type, here's the short of what I want to do with all of the above. I want to take the contents of the visible listbox, summarize by listing each unique barcode, and have a count of how many of each unique barcode appears in the listbox.
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Sep 3, 2011
I want to summarize this code because it is too long:
[code]...
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Feb 20, 2009
I have an integer array with 4 indexes. What is the easiest way to get the sum of all integers in the array.
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Mar 29, 2011
I would like to sum data in dataTable from to if ColumnLine <> SA sum only HINKSHKEY = 1 if ColumnLine = SA sum all data I try to use code below but it not work.
[Code]...
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May 19, 2010
I'm not really sure how a datatable is really used, but I've used it in an application I'm writing, by way of examples I've found online. Basically can anyone give me an explanation of datatables in laymen's terms? Second I have an example to discuss. I have a datatable that is filled with a result from a MySQL query. How can I populate a textbox with a specific item from the datatable?
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Feb 23, 2012
I am little bit stuck here .. I have a datatable as _
Dim dtPupil As New DataTable
dtPupil.Columns.Add("PupilId", GetType(Integer))
dtPupil.Columns.Add("Forename", GetType(String))
dtPupil.Columns.Add("Surname", GetType(String))
I made a select (assuming names combination will be unique)
Dim strQuery As String = "Forename ='" & forename & "' and Surname = '" & surname & "'"
Dim dr As DataRow()
dr = dTablePupil.Select(strQuery)
I wanna have PupilId as an Integer of the row that match, so
Dim PupilID As Integer = ??????????
What do I need to write here ? There will only be 1 row returned.
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Jul 15, 2010
i have a problem when add data into dataTable. The problem is that after populating the dataTable with the 1st, and when adding a 2nd column, the row that contain the data is not at 1st row of 2nd column. It is directly under 1st column row. For example, column 1 has 10 rows of data. After adding the 2nd column, the data is at row 11 instead on the 1st row. Can someone tell me how to add the data for 2nd column so that it will be in the 1st row. Code for adding the data
Dim col1 As DataColumn
Dim row1 As DataRow
col1 = New DataColumn("Column 2", System.Type.GetType(" System.String"))
dTable.Columns.Add(col1)
[code]...
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Jun 20, 2012
I am trying to import a large array of integers stored as a csv file into a VB.Net DataTable called BeamMap. The .csv file consists only of integers, with a delimiter of ,, no quotes around the data (ie., 1,3,-2,44,1), and an end of line character of line feed and carriage return. All I want to do is get each integer into a DataTable cell with the appropriate rows and columns (there are the same number of columns for each row) and be able to reference it later on in my code. I really don't want anything more than absolutely necessary in the code (no titles, captions, headings, etc.), and I need it to be fairly efficient (the csv array is approx. ~1000 x ~1000).
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May 21, 2010
How to copy all datagridview data into a datatable ?
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May 18, 2011
Using VB .NET, I am wondering about the best way to get some statistical data out of a Datatable. I would rather not hit the database with another query, but just look through the datatable I already have. So, Linq must be the answer? I have a datatable (dtable) containing two columns: tech_id and colour. From this, I would like a new datatable containing three columns: tech_id, colour, and count. Of course, I'm trying to find out how many times each "tech_id" used each distinct "colour".
Something like:
tech_id colour count
------------------------------
JM brown 18
JM purple 10
JM green 3
PB brown 51
PB grey 8
TD brown 4
TD pink 67
TD grey 41
My best attempt with Linq is not at all correct, but is pasted below to show how far I've got:
Dim ColourCounts = From p In PGWorkingDataTable.AsEnumerable() _
Group p By p.Field(Of String)("colour") Into Count() _
Select tech_id, colour, ColourCount = Count
Dim colourStatsTable As DataTable = ColourCounts.CopyToDataTable()
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Feb 4, 2009
I have a dataset and inside it a dataTable. How can I retrieve the data of the datatable?[code]...
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Aug 3, 2011
I'm using two textbox's to enter text and retrieve the data and then show that data in a datagridview.Here is my
Dim con As New OleDb.OleDbConnection
Dim dbProvider As String
Dim dbSource As String
[code].....
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Jun 11, 2012
I would like to sort data in my datatable I am focusing on one of my columns that I want to sort in ascending order. Currently I have been using the following code
[Code]...
I nwant to sort the data so that I can output the data in a gridview.
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Jun 17, 2011
i want 2 copy some part of one table into another but getting error @ this line
sqlCmd = New SqlCommand("insert into name_table(name) values ('" & ds.Tables(0).Rows(1).Item(0) & "'", sqlCnn)
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Aug 6, 2010
I have a large data.DataTable and some formatting rules to apply.For example, the LASTNAME column has a value of "Jones" but my formatting rule requires it be 10 characters padded with spaces on the right and uppercase only. Like: "JONES "My initial thought is to loop through each row and generate a string. But, I wonder if I could accomplish this more efficiently with a DataView, LINQ or something else.
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Oct 19, 2011
Is there a dll somewhere or some place I can read a good example on how to add data from a datatable into a multicolumn combobox? Preferably to be able to stick a datagridview right into the combobox would be awesome.
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Feb 10, 2009
I am trying to add data to a access datatable column I am using a richttextbox to fill in any data but when i save it to a column in a database and if there are more chars then 255 then i get an error (try to enter more then column lenght) anything under 255 is working fine the column in access = type of 'MEMO' so no limited to 255 it's the hystory to send that is giving me the problem
Dim history_to_send As String
Dim day_to_send As Date
Dim ID_to_send As Integer
[Code]....
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May 27, 2009
I have been having trouble finding a good way to do this. Basically what I need to do is take a query from a SQL Server Database and place it into a DataTable (or an array) for manipulation. I've got the connection and everything working, but none of the methods I've tried so far seem to work very well.I need it to compare data with an uploaded CSV file and post on a website.
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Feb 22, 2011
I used a table adapter to fill a data table from a sql database.then made the datatable the source to a datagridview.how do i change data in the datatable, and how do i save it back to the sql database.
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Dec 2, 2010
How can I fill Datatable with DataGridView data (VB/C# .NET)?
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Oct 18, 2011
When my application loops through the first code block below, I get valid data for all datarow fields. [code]...
But I get an error when looping through that code block "Collection was modified; enumeration operation might not execute." [code]...
However, in the second code block, I get a valid record for MgrID, but I get a blank value for the other fields.
When I look in the database, all fields in that table have valid values.
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