VS 2008 : DataTable Filter To Another DataTable?

Mar 11, 2010

i have a datatable with some data, i need to select some of the data, and put that data in a new datatable.

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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 2008 Using LIKE In DataTable Filter?

Nov 9, 2011

I am writing part of a function that tries to search for a username in a list in a rather broad way (last resort). It seems that LIKE does not like trying to match only the first and last characters.

strCriteria = "somename"
drFilter = tblUsers.Select("User LIKE '" & Strings.Left(strCriteria, 1) & "%" & Strings.Right(strCriteria, 1) & "'")


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VS 2008 DataTable DefaultView Filter?

Mar 31, 2010

Is there anyway to filter a DefaultView with a LIKE-type operator as in MySQL?I want to be able to make it so that in my program, a person can type in a textbox and as they type, the list is refiltered based on what is typed, but I want it to match anything in the string of text, not just starting from the beginning or an exact match.

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VS 2008 Sorting A Datatable Before Filter?

May 15, 2010

What i am doing is to enable a user to specify in a combobox on a form a threshold (integer). On a button click the code steps through a datatable until the cumilative value of a field in the records row are equal or dont exceed the figure specified. It then selects these rows and presents them in a datgridview in another form. This all works just fine.

What i am struggling with is undertaking a sort on another field before it starts the filter part. It appears to revert to the default order. Here is my

If ComboBox1.Text = "Co2 saving in tonnes" Then
Dim table As New DataTable
Dim limit As Integer = ComboBox2.Text ' Your threshold


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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.

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Asp.net - DataTable Filter Mystery?

Apr 12, 2010

In the below code, I create a DataTable and filter it. When I use filter1, everything works as expected.When I use filter2, everything works as expected only if the SubsectionAmount variable is less than 10. As soon as I set SubsectionAmount=10, the dr2 array returns Nothing.I can't find what is wrong. Here is the code:

Imports System.Data
Partial Class FilterTest
Inherits System.Web.UI.Page[code]..

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Filter Datatable Through Combobox?

Jun 22, 2010

I want to filter the data that's being displayed to my datagrid once I click the combobox and select a specific value,the selected value will be the item to filter the data that I needed to be displayed in the datagrid.. I'm using a datatable,a combobox and a datagrid..here's my code

Private Sub cboView_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles cboView.Click
dt = New DataTable


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How To Correctly Filter A Datatable

Jun 17, 2010

[code]When I call da.fill I am inserting all records from my query. I was then hoping to filter them to display only those where the GroupingID is equal to 0. When I run the above code. I am presented with all the data, the filter did not work. Please can you tell me how to get this working correctly.

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Sql - DataTable.Select Filter?

Dec 28, 2010

I need filter for multiple values on one column using the DataTable.Select method.

Dim totalFatal As Integer =
m_DataSet.Tables("tblAccidentNonMotorist").Select(String.Format("[AccidentNumber] = '{0}' AND CONTAINS([InjuryClass], '"01" OR "02" OR "03"'", accidentNumber)).Length


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Filter Datatable Using An Array Of Values?

Dec 14, 2010

I have a datatable called dt which includes a column called type.I have a string array called typestringarray with about 15 members

I want to create a new datatable from the rows where type is a member of typestringarray[code]...

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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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View Previous Datatable After Filter Applied?

Mar 16, 2011

Code is:

Private Sub PatientFields()
txtFirstName.Text = pa.Tables(0).Rows(intcurrentindex).Item("Forename").ToString()
txtLastName.Text = pa.Tables(0).Rows(intcurrentindex).Item("Surname").ToString()


Once the search is executed I want to be able to click "refresh" and the original table is then shown in the datagridview. If I try adding after the search sub is completed:

table.DefaultView.RowFilter = Nothing

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VS 2010 Filter Data With DataTable And DataView?

Feb 15, 2012

I'm loading a DataGridView from a DataView which collects data from a DataTable. I use the DataView to filter, this is the

Dim dv As New DataView
dv = DataSet4.Tables("TABLA1").DefaultView
dv.RowFilter = "propietario='" + NombrePro + "'"


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VS 2010 Using LINQ To Filter Data From A Datatable?

Sep 1, 2010

I am wondering if it is possible to filter data from a datatable.Sample datatable

Sno CatID Nos
1 XYZ 25


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C# - Enable The User To Apply A Custom Filter To A System.Data.DataTable?

Feb 16, 2012

I 'd like to enable the user to apply a custom filter to a System.Data.DataTable.At the moment I have a very simple function like this:

Dim result = dataTable.Select(txtUserInput.Text)

With the filtered results I'd like to do further operations(e.g. Database Update/Delete).Is an sql injection protection needed or is the "Select" function secure?

//Edit:Can the "select" function be abused to manipulate any data in the datatable, execute code, ...? If the only danger is that this function can return to much/to less data there is no problem. But if the data in the dataset gets corrupted it's a real problem.

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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 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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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

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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]...

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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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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.

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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.

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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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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?

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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)


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.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


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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


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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 ?

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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


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