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


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VS 2008 Datatable - Select And Filtering Year On A Date Field

Aug 16, 2009

I need to use .Select and filtering year on a date field,how can this be done,the next code give me error : the expression contains undefined function call year() vb.net For Each wRwTmp As DataRow In wTblC.Select("year(start_date)=" + wYear.ToString)Next

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VS 2008 Difference Between DataTable.Select And A For Each-loop?

Dec 30, 2009

I just discovered the DataTable.Select-function, and boy I'm glad I found it! It makes my code run several times faster. But, I don't quite understand why it's so much faster than my previous code. In my first code, I looped trough my DataTable to find the specific row, like this:


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Assign Several Field Values In A Datatable Into A Single Text Box?

Jul 9, 2009

I have this working for a single field in a text but im trying to add more than one fields data .[code]...

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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

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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

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VS 2010 Select Distinct Values From A DataTable?

Sep 28, 2010

Is it possible to select distinct values from a DataTable?

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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)

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Populate A CheckBoxList With The Contents Of The DataTable?

Mar 9, 2012

I've got two lists, ones a DataTable, the others an array list. I want to populate a CheckBoxList with the contents of the DataTable, and check any entries that exist in the array list:

Heres the DataTable that will populate the checkboxlist with the product column:

index product
1 Prod1
3 Prod2
5 Prod3


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Multiple Selection On A Checkboxlist To Filter A Datatable .net?

Feb 27, 2012

I have a datatable loaded from a database. I bind the datatable to a gridview on page_load. Now I want to filter the gridview by a user selection so I made a checkboxlist and wrote some code as follow at CheckBoxList1_SelectedIndexChanged


With this code above, it can filter if there is only one selection on the checkboxlist. I try to loop the checkboxlist myself but always ended up in errors. Hope someone can help me out to make this work.

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Find Out Values In One Datatable That Are Not In Another Datatable?

Dec 28, 2011

I've got two data tables with store numbers. I need to find out what store numbers are in one data table that arent in another.say one table A might look like:

34, 35, 39

the other table B may be

34, 35, 39, 45

I need to find the 45 If I use nested For Next I can get matches but anything not a match would show up not just the 45 value as the next progresses.

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Unable To Select Multiple Column In Datatable (dtable.select())

Aug 2, 2011

Unable to select multiple column in datatable

Dim Activitydtb As DataTable = DirectCast(ViewState("TalentcharacterActivty"), DataTable)
grdviewactivity.DataSource = Activitydtb.Select("SELECT


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How To Get Value From Field In DataTable

Mar 15, 2009

I am trying to use the value of a field of the last row in a table. I have been trying to use tables().Rows().Item() but somehow it always returns the value of the first row instead of the last one. here is the code:
Dim accion As String
Label1.Text = ""
Label2.Text = ""
Label3.Text = ""
[Code] .....

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Calculating Datatable Field?

Mar 15, 2012

I'm having some problems calculating the values for two diferent fiels of the datatable. it return " Object reference not set to an instance of an object"this is How I feed the datatable

Dim daProd As New SqlDataAdapter
Dim conProd As New SqlConnection
conProd = Connect()
Dim cmdProd, cmdSave As New SqlCommand


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C# - Getting Value From Field In DataTable When Column Name Has Spaces?

Mar 8, 2010

I have tried:

ObjDTOleDBNFeIntegra.Rows(I)("[Cnpj Cpf]").ToString() //with brackets
ObjDTOleDBNFeIntegra.Rows(I)("'Cnpj Cpf'").ToString() //with apostrophe
ObjDTOleDBNFeIntegra.Rows(I)("Cnpj Cpf").ToString() //without anything

I'm using VB.NET, but comments with apostrophes in here don't seem to be identified.And I get the exceptions for each case:

Column '[Cnpj Cpf]' does not belong to table Table. (fail)
Column 'Cnpj Cpf' does not belong to table Table. (fail)
Column ''Cnpj Cpf'' does not belong to table Table. (fail)

What should I do in order to ger a value from a field in a dataTable when the column name has spaces ?

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Have A Field In A Datatable (dt) That Can Be Integer Or NULL?

Mar 1, 2010

I have a field in a datatable (dt) that can be integer or NULL.

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How To Save Contents Of Field From Row In DataTable

May 27, 2010

I have a "For
Row As
DataTable.Rows" type loop. I want to save the contents of a field to use in subsequent processing.

It looks to me like the proper way would be to use something like the following:
Dim saveCatalogWorkID As VariantType
For Each clsWTRow As System.Data.DataRow In clsWTDataTable.Rows
saveCatalogWorkID = clsWTRow.Field("CatalogWorkID")
Next clsWTRow

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Compile A Currencies Datatable Based On Xml?

Feb 9, 2011

i'm trying to compile a currencies datatable based on this xml:

<?xml version="1.0" encoding="UTF-8" ?>
- <gesmes:Envelope xmlns:gesmes="http://www.gesmes.org/xml/2002-08-01" xmlns="http://www.ecb.int/vocabulary/2002-08-01/eurofxref">
<gesmes:subject>Reference rates</gesmes:subject>
- <gesmes:Sender>


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Get BindingSource Position Based On DataTable Row?

Aug 30, 2010

I have a datatable that contains the rows of a database table. This table has a primary key formed by 2 columns.

The components are assigned this way: datatable -> bindingsource -> datagridview. What I want is to search a specific row (based on the primary key) to select it on the grid. I cant use the bindingsource.Find method because you only can use one column.

I have access to the datatable, so I do manually search on the datatable, but how can I get bindingsource row position based on the datatable row?

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Next Row In A Datatable Loop?

Jan 7, 2009

Just curious is there a "next row" method when looping through a datatable? Basically, I want to be able to go to the next row without having to go to the end of the loop. See my coded example:


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DataTable Field Type From SQLServer Table

Mar 5, 2009

If the field type in the SQLServer db is 'nvarchar 10', what would be / is the field type in a DataTable filled by rows from this SQLServer table? String?

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Creating A DataTable From An Array Based On A Structure?

Apr 26, 2012

I have a array based on a structure that I want to build a datatable from. Here is what my structure looks like currently,

Public Structure QRQFiles
Public Complex As String
Public DescriptiveName As String[code]....

Since I have a structure with in the structure will I have to define two datatables to represent this?

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Fill Datatable Based On User Input

Apr 20, 2012

I have a SQL db that holds the records for my page. On my page I have a details view I want to populate with records from my db. I can populate the records just fine, I need to be able to populate in records based on a user selection from a drop box?To clarify, on my main page I have a drop down list with years (ie. 2011, 2010, 2009), and a drop down containing account codes (ie. six-digit numbers). Based on what the user chooses for the year (for example 2010) and the what they choose for the account code (for example 123456) I want to populate the details view (which is on a seperate page) with only those records from 2010 and with the account code 123456??

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Using BETWEEN In A DataTable.Select?

Dec 15, 2009

I thought this would be simple but obviously not!

Basically, I have a date and want to do a 'between' on two date columns like this:

myDataTable.Select(myDate & " between (StartDate and EndDate)")

Where StartDate and EndDate are date columns that do exist in the DataTable.

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How To Fill DataTable Via For Loop

Feb 23, 2010

I am using a SQL query to fill a datatable from 2 associated tables. The first table has Products and the second has associated addonpackages. When I loop through my Products I am able to get all of the addonpackages for the first product but after that the datatable is only getting populated with the last addonpackage for each product. ie:

product 1 - all 6 packages are added tp the datatable
product 2 - only package 6 is added to the datatable
product 3 - only package 6 is added to the datatable
...and so on

My query follows. Why I am getting all of the info for the first product but just the last item for all others. No matter which product I would query first, I get all of the associated data with it but only the last for all others.

SELECT Products.ProductNumber, Products.Name, Products.Mnemonic, AddOnPackages.PackageNumber,
AddOnPackages.Name AS PackName, AddOnPackages.Mnemonic AS PackMnem
Products ON AddOnPackages.ProductNumber = Products.ProductNumber
WHERE (Products.Name = @ProdName)
ORDER BY Products.ProductNumber, AddOnPackages.PackageNumber

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Loop Through The Rows Of A Particular DataTable?

Jan 9, 2009

IDE : VS 2008,Platform : .NET 3.5,Here is my DataTable columns :ID Note DetailI want to write sth like this :

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Set Value For All Rows In DataTable Without For Loop

Feb 21, 2011

I'm trying to set the same value for all rows for a single column in a datatable without using for loop. Any faster methods to achieve the same.

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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?

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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)

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Adding Rows To A Datatable Based On Elements Of An Array

Feb 4, 2010

I have a data table in a loop that adds rows on each loop. During the loop i collect an array of unknown size. At the end of the loop i want to add a new row to the datatable with eachelement of the array as a field.[code]I could hard code this if i knew how many item would be in the array but i dont.Is there any way i can loop through the array and append the value to a row?

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