Creating DataTable And Copy Existing DataTable Schema?

Feb 17, 2011

I'm using 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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ADVERTISEMENT - 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 - Import Schema From One Datatable To Another?

Jul 21, 2009

Are there any commands that make life easy with respect to this? I want to take the column schema of one datatable (.net datatable) and copy it to another new datatable.

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VS 2008 Created An Xml Schema And An Xml File From Datatable

Jul 9, 2009

I have created an xml schema and an xml file from a datatable. I am now trying to read that data in which is working fine. I can access the data but the problem is that I want to know how many Tables there are in the xml file. For example the setup looks like this: [code] I want to know how many "<table>" objects there are.

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Why A DataTable Does Not Refresh Its Schema After Reading It From A Xml File

Jun 7, 2009

I have an untyped-Dataset with two related DataTables, and I have a grid bound to the parent DataTable. I used the WriteXMLSchema() method of the parent DataTable in order to save the schema in a xml file. Then I opened the file with the Notepad, deleted two columns from the schema file and saved it. After that, I used the ReadXMLSchema() of this DataTable but -contrary to what I would have thought- the DataTable's structure was unchanged. Using the debugger I noticed that after calling the method the number of columns was the same. Why? How can I make the DataTable's schema to be changed by using a file?

notice that I am using the DataTable's methods and not the Dataset's because I do not want to touch the child DataTable.

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Add A Row In Existing Datatable?

Dec 9, 2009

In a Windows Application, I have a datatable wich is not from a database. I want to add a new row, but when I add a new row only the new row is in the datatable, not the existing data.dim dt as datatable treelist.datasource=dt this is existing item here in any event i want to add the new row in the datatable so that new node is added to the treelist

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Have A Datatable Which Has 5 Column : Copy Only Its 2 Column In And Save It Into New Datatable?

Mar 15, 2009

I have a datatable which has 5 column. It is possible to copy only its 2 column in and save it into new datatable.I used this code but it copies all the 5 column

Dim qry As DataTable = (From obj In temptable Where obj.Item("Column1") = 0 _
Select obj).CopyToDataTable
i used this one but it is not supported

Dim qry As DataTable = (From obj In temptable Where obj.Item("Column1") = 0 _
Select obj.item("Column1"), obj.item("Column2")).CopyToDataTable

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Add A New Row To An Existing Dynamic Datatable?

Sep 25, 2010

I have a dynamic datatable, created from a database. I want to add a new row (blank), so there is an option to choose nothing in a combobx. Everything works ok without adding the new row. But when I add a new row, the combobox displays nothing. What am I missing?

Here is the code
Dim DT As New DataTable
DT = DS.Tables("CallStatus")


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C# - Use SQL Code On An Existing Datatable?

Jul 30, 2010

I'd like to utilize Select & Insert statements on a DataTable in VB.NET or C#.


Dim Results as DataTable Results = Select * from SourceDataTable where PlayerID < 10

Is anything similar to this possible?

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Run A Query On An Existing DataTable?

Apr 5, 2011

I'm using VB.Net to create a windows form application. One form has a DataGridView that displays data from a SQLServer table via a TableAdapter and BindingSource whose filter is set as I need it. Elsewhere on the same form I would like to show totals for four columns of the same table, but from a totally different set of rows. All I've been able to figure out is to create another TableAdapter - but this seems foolish since the SQL table data has already been brought into my application by the first TableAdapter.Is there a way to run a query on the DataTable that was filled by the first TableAdapter, and how do I get the query results?

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Append Text To Existing Row In Datatable?

Aug 4, 2010

I'm trying to make a calendar in and I have come across this problem. I want to append some text into an existing datatable row. When I watch my debugger it says:"In order to evaluate an indexed property, the property must be qualified and the arguments must be explicitly supplied by the user.".

Dim aantalRijen As Integer = 1
For x = 0 To 6
Dim dttopdrachten As New DataTable


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How To Fill Column Of Existing DataTable

Mar 28, 2012

I have a table like this
col1 col2 col3
a b
c d
I want to fill the 3rd columns.

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Import A XML File To An Existing Datatable?

Jan 29, 2012

I am trying to import an XML file to an existing datatable created in Visual basic and saved as a dataset and as a mdf file. However I having problems writing code that will allow it to save and recognize what fields to go to from the corresponding xml file.

For instance I want all that start <Artist> to go in the artist field etc....

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Import (text - CSV) To Existing SQL Server Datatable

Aug 18, 2011

I need to get a text file into a blank datatable that already exists. The table has its column names already so I need to insert the data into the fields. The text file is set up as so for example:


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VS 2005 Add Column Between Existing Columns - Not To End Of Datatable?

Oct 20, 2009

I am working with two different connections because the information I need is stored in two different locations. One being Oracle, the other being Access. I pull all the information I need from Access with the exception of one field which I pull from Oracle. When I add this field to my datatable, it adds it to the end. I am wanting the column that I add to be between column 1 and 2 of my current datatable. Anyone know the best way to do this? From what I could find, there wasn't a way to re-arrange columns. Here is my code.

Dim da As New OleDbDataAdapter(" SELECT tblSummary.WorkOrderNumber, tblLabor.Crew, tblLabor.NumberOfMechanics, tblLabor.NumberOfHoursPerMechanic, tblTasks.TaskNumber, tblTasks.TaskDescription FROM (tblLabor tblLabor INNER JOIN tblTasks tblTasks ON


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Database - Insert A DataTable With Existing Key To A SQL Server Table

Mar 18, 2010

I am working with VB.NET.. i have a DataTable called "QUESTION", containing 3 fields:

QuestionNumber (unique integer key)

In my SQL Server database I created a Table called "QUESTION" with the same fields.
QuestionNumber is defined as integer unique key, auto increment

Now, when i make a bulk copy to insert the DataTable into the SQL Server, the database overwrites my QuestionNumber from the DataTable and generates new ones (starting from 1 increment 1).

How do i have to change my database setup, that the original QuestionNumbers are copied into the database?

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Sql - Updating Datatable To EXISTING Global Database Connection?

Jan 13, 2011

I am using Microsoft Visual Basic 2010 Express. I have a WPF-based project. I have a successful connection to a database in Database Explorer, and a working existing Data Source in Data Sources.

I created a datatable from the datasource using this code:

Dim roster_table As New DataTable("AGENT_ROSTER")

I can manipulate this datatable just fine, but I cannot figure out how to save its data to my database (agentroster.sdf) since the connection is on a global level, and isn't declared in this particular window.

How do I update this database from the datatable on this window?By the way, I tried creating a connection on this window's code, using the exact same connection string as the successful globally-connected database, yet it said that it couldn't connect.

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Copy A Datatable Into A Clipboard?

Dec 8, 2010

I want to copy a datatable into a clipboard so I can paste it into excel and other programs I use, how can I get that to work? If there is no way to get it to work, how can I get a datatable in the clipboard and have it tab delimited?

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Copy Datatable To Dbo.Products?

May 20, 2010

I want to copy datatable to dbo.Products

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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 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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Copy Complete DataTable To SQL Table?

May 25, 2011

I have a DataTable with 20 columns and it have lot of rows. I have created a SQL table which is have the same 20 columns. Now I want to copy the complete Datatable to SQL table using 2005.

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Copy DataTable Derived From My Own Class?

Jun 18, 2008

I have a derived DataTable[code]...

Overload resolution failed because no accessible LoadDataRow' can be called with these arguments.

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Copy Filtered DataView To DataTable?

Jun 1, 2009

I start by looping through a string array, parsing out the strings I want and saving them to a temp table (I believe this part is working).Then, I take a DataView of the tale to get only the unique values from the rows.Then, things get messy, I need to get these unique values into my dataset. I been trying to do so using the DataView and also by passing the View to a new temp table then looping the values into the DataSet

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Copy Selected Columns From One DataTable To Another?

Mar 1, 2011

I have a scenario where-in I have a DataTable with certain columns "Col1, Col2, Col3". I want to copy just "Col2, Col3" into another DataTable which has a primary key "ID". What is the best way to copy them. There are 5000+ records and performance is a key factor.I tried with Select, DefaultView.RowsFilter but no success. I know one option is to loop through all records an copy data one by one in second DataTable. But wanted to know a better way.

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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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Clone Or Copy A Datatable - Getting A Constraint Error

May 18, 2010

Im getting a constraint error when running the following code. there are four fields set as the primary key on the table: bid number, phase number, phase version, detail number.

It errors out saying that bidno, phaseno, phaseversion are the keys and unique. it does not mention the detail number, but it will error out as soon as i run the line dtDest = dsbid.phasedetail.copy....or, if i use the clone (as in the example below), it errors as soon as i add the row.


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