VS 2010 Datatable - Summarize Multiple Occurrences Of An Item In A Datatable

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

View 15 Replies


VS 2010 - DataTable Count And Summarize Results

Oct 4, 2011

In my datatable I have a single column containing a series of integer values. eg:-
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

View 2 Replies

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.

View 4 Replies

Loop Datatable And Select Checkboxlist Item Based On The Datatable Field Values

Aug 18, 2011

I am trying to display value of the field ("UserID") for every row exists in datatable to checkboxlist(make the checkboxlist item selected).

I used for loop, but only the field value from last row of RoleUsers table is selected in the checkboxlist.

Here is my code

Private Sub DisplayRoleUser()
Dim conn As SqlConnection
Dim cmd As SqlCommand


View 3 Replies

VS 2010 : System.ArgumentException Was Unhandled Message=DataTable 'get_item_list' Does Not Match To Any DataTable In Source

Apr 21, 2010

I am working on a project that takes an xml schema and xml data files and places them into a DataTable, the 2 files are generated from a working table that i have written to disk. I wish to load these 2 files into a DataTable. Here is What i have

Friend Function CreateTable(ByVal tableName As String) As Boolean
Dim table As New DataTable(tableName)
table.ReadXmlSchema(tableName & ".xsd")


this however produces the following error on line 3


System.ArgumentException was unhandled Message=DataTable 'get_item_list' does not match to any DataTable in source.

get_item_list is the parameter passed into this function (tableName)

View 6 Replies

VS 2005 Datatable Vs Dataview - Apply A Filter To The Defaultview.rowfilter Property Of That Datatable

Mar 15, 2010

I have a datatable and I apply a filter to the defaultview.rowfilter property of that datatable. If I then loop through the rows collection of the datatable, will I only be able to see those rows that the filter applies to, or will it loop through all the rows?

View 6 Replies

Datagridview Bound To A Datatable Setting Its Datasource Property To The Datatable

May 20, 2011

I have a datagridview bound to a datatable setting its datasource property to the datatable. I would like to have a child form that contains a list of columns associated with the datatable that contains a checkbox that will allow the user to hide and show the columns ( I do not know the best control to use here) (I assume this is the easy part as All i need to do is loop through each of the datatable's columns to get the column name)

now I would like save these visible columns on some event like form_closing so that the next time the user opens the form up it will remember the settings

View 5 Replies

Get Subset DataTable From Main DataTable, But Preserve Primary Key & RowErrors?

Apr 16, 2012

I came across a problem with using a BindingSource as my DataGridViews.DataSource. Whenever I applied a filter to a column in the BindingSource and the user makes changes that don't match the column filter the DataGridViewRows would automatically disappear. A similar thing would happen when applying a Sort to a column. If the user made any changes the DridGirdViewRows would automatically sort causing rows to be moved around. This was not ideal for my application and there isn't anyway to stop this from happening with the BindingSource.

To correct this issue I have to use subsets of data. I use a DataView to apply the filter and sort to the main DataTable, which creates the subset DataTable.The problem is when I use the DataView.ToTable method I loose the Primary Key and RowError information. So I have to reapply this information everytime the user filters or sorts the DataGridView.Is there a better way to get a subset DataTable?[code]...

View 10 Replies

Set ItemsSource To DataTable Item?

Jan 14, 2011

I am trying to set the itemssource for my WPF-based VB 2010 project to a datatable item. The datatable is "roster_table" and the column name I want to display the items from in the list box is "DATA_NAME". The listbox is "lstNames".

I can't find a straight answer anywhere. How do I set the itemssource for the listbox to the datatable's column, as described above?

View 1 Replies

Assign A Populated Datatable's Columns To Another Empty Datatable?

May 28, 2007

Is there a simple way to assign a populated datatable's columns to another empty datatable? That is, I want to copy a datatable's structure only but not its data.

View 6 Replies

Creating DataTable And Copy Existing DataTable Schema?

Feb 17, 2011

I'm using vb.net 2010.I have a DataSet with a Table and data. MyDataSet1 which contains Table1 I want to create another table that is the same as the Table1 but without data, but it should have the columns, etc.

View 1 Replies

Getting Array Of Selected Datarows From A Datatable.select Into A Datatable?

Apr 8, 2009

I am getting array of selected datarows from a datatable.select.I use the commands below to get that array or datarows

Dim foundRows() As DataRow
strExpression =

Here is what I tried.I have looked at examples by MS but they all just write to the screen and I have no interest in that.

For Each rowWork In foundRows

"LineOfBusiness = 'CPP'"

foundRows = modXchange.pdtWork.Select(strExpression)

Now, I want to place the rows from foundrows into an empty data table.I did what I thought was the obvious but that only returns a bunch of rows with no data

View 1 Replies

Loading The Contents Of DataTable Adapter Query Into A Datatable?

Nov 18, 2009

load the contents of a query from a dataTable Adapter into a datatable?

View 2 Replies

Tableadapter.fill(datatable) Fills The Row That Was Not Added To The Datatable

Aug 6, 2010

I am trying to add NewRow to the database by using datatable in dataset, but before I do that I want to make sure that row is not already there. I create new row for the datatable I am working with, fill it with information. I fill datatable with the row from database that has the same primary key as my NewRow by using tableadapter.fill method, but when I do that my NewRow that was never added to the datatable is filled with information from database(and not information that I assigned to it). I count rows in my datatable before I fill it and it's 0, so why is my NewRow affected by Fill command? (I am using VB.NET 2005 Framework 2.0)


View 5 Replies

Can't Add Item To Listbox Bound To Datatable

Feb 24, 2009

I have a listbox bound to a datatable, and controls that are bound to the same datable. As you navigate through the listbox, the controls correctly reflect the selected item, and changes to the controls update the dataset OK as well.Now I'm trying to add a "New" capability to the form. So on the click for "New", I deselect the currently selected item and clear the controls[cod]e...

View 1 Replies

Get Item Value From A Combobox Using A Datatable As It's Datasource?

May 20, 2010

How can I get an item value from a Combobox using a datatable as it's datasource? Here's my code for constructing the combobox. This code works, that's why I'm not showing it all, but I want you to know how I'm creating the combobox.

query = "SELECT category_id, name FROM categories ORDER BY name ASC;"
dbCommand = New MySqlCommand(query, dbConnection)


I want to display what is the item you physically see in the combobox that you select.

View 2 Replies

.net - ImportRow From DataTable To Another And Still Destination DataTable Is Empty?

Apr 7, 2012

I'm trying to copy one row from DataTable to another, I looked almost everywhere and I can't find a reason why this is happening, I'm using ImportRow and still the New DataTable is empty. Here's one of the answers similar I found and It's still not working!:

Dim newTable As New DataTable
Dim dsFrom As New DataTable
For Each DBShoes In list
Dim iShoeID As Integer


View 1 Replies

Asp.net - Copy Data From Datatable To Dataset.datatable?

Oct 31, 2010

how to copy data from datatable to table in dataset i ry this but its readonly property


View 1 Replies

Asp.net - Looping Through Records From One DataTable And Populating Another DataTable In .net

Aug 10, 2011

I have an asp.net application where I have a datatable ("DataTableA") that returns just one column ("ProductID").

I want to read each row of "ProductID", process some business logic, then copy both those columns (ProductID & ProductIDBusinessLogicValue) to DataTableB. This DataTableB is then displayed on the asp.net page.

What would bhe the best way to read each row of DataTableA ?

View 2 Replies

Use A Datatable As A Data Source To Update A Second Datatable Using Sql?

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


View 6 Replies

VS 02/03 Datatable - Select Statement And It Will Go To A Datatable Object

Apr 4, 2011

I have a select statement and it will go to a datatable object, I would like to do the following

textbox1.text=datatable(first field value)
textbox2.text=datatable(second field value)
textbox3.text=datatable(third field value)

View 5 Replies

VS 2008 Nesting A Datatable Inside A Datatable?

Mar 16, 2011

Is there a way to nest a datatable into another datatable? I know you can do this with gridviews but thats not what I'm looking for.

Also, I don't want to merge the datatables. What I'm trying to do is have a datatable with 2 columns and each column containing different datatables.

View 7 Replies

DataTable.Copy Method - Property 'Item' Is 'ReadOnly'?

Feb 3, 2011

ds.Tables.Add("OpenTickets") ds.Tables("OpenTickets") = ds.Tables("AllTickets").Copy()

View 2 Replies

Storing String Item In A Date / Time DataColumn Of A DataTable

May 27, 2009

I have a datatable which loads data from an Excel Spreadsheet. One of the columns in the Excel SpreadSheet was of type "Date/Time" in which date values are stored. Now I appended the datatable with three new rows and I wanted to store string values in these rows using the code below. However due to the fact that one of the columns are date/time type, an error is generated as date/time column does not accept string value. I have two questions

a. Is it possible to store string value in date/time DataColumn?

b. Is there a remedy to this situation? [code]

View 3 Replies

Add Multiple Datatable In Crystal Report

Jun 19, 2010

am new in crystal report, here wana to add 2 datatables in the crstal report' Private Sub btbPrint_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btbPrint.Click


View 1 Replies

Add Textbox Value To Datatable Multiple Times?

Jan 23, 2011

Here is my [code]...

My textbox (txtCopies) default value is 1 so naturally, as it is coded above, the datarow is added once into the Movies Table. But what I need to know is how to code if the txtCopies field has a greater integer value.

View 6 Replies

Combine Multiple DataTables In One DataTable?

Apr 6, 2012

I am using Microsoft Access database. Since Access Database Table cannot have more than 255 columns, I am using vertical database partition technique where I have splitted informations into 5 different tables. Each table has 100 columns, and first column is primary key. Now I need to read data from these five tables so that I can export it into Excel file.


View 2 Replies

How To Create Datatable With Multiple Records

Jun 6, 2009

How to create datatable with multiple records.

View 6 Replies

Inserting Multiple Rows From A Datatable?

Mar 4, 2009

I am using VB.NET 2005. I need to know if I have some data values in a Datatable consisting 4 rows then is it possible to insert all these rows into a Table of a Database using a single INSERT statement?

View 7 Replies

Merge Multiple Datacolumns In A Datatable?

Feb 2, 2012

I am trying to merge multiple datacolumns in a datatable. Eg. The address data is stored in a different columns such as, Housename, street, city and postcode. I want to merge those datacolumns in to one and put it into one datacolumn as "Address".

View 1 Replies

Copyrights 2005-15 www.BigResource.com, All rights reserved