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Trouble binding C1FlexGrid to MySQL ODBC Driver - reads but won't update

I can't figure out how to get my C1 FlexGrid (2.6) to update table data in the underlying database connected via an ODBC DSN.

The grid displays the data as expected and allows me to change it but when I reopen the program, the changes are gone. I use the same ODBC DSN in other apps (VB6 with a good old vsFlexGrid) and can update the data there.

I'm using version 5.1 of the MySQL ODBC driver on a Win 7 x64 machine and VS 2010 / Visual Basic

I can't get this simple windows form application with a C1FlexGrid bound to a DataTable to update the database.

Any tips as to what I am doing wrong would be appreciated.

Here's the relevant code:

'Grid is a control on the form of type C1.Win.C1FlexGrid

Private oConnOdbc As OdbcConnection = New OdbcConnection("Provider=MSDASQL;DSN=IA CRM")

Private Sub Form1_Load...

Dim oAdapter As New OdbcDataAdapter() 
oAdapter.SelectCommand = New OdbcCommand("Select * From Testing", oConnOdbc) 

Dim oDataTable As New DataTable 
oAdapter.Fill(oDataTable)

Grid.DataSource = oDataTable

End Sub 

Private Sub Form1_FormClosing... 

' from what I have read, this shouldn't be necessary
Dim oDataTable As DataTable = CType(Grid.DataSource, DataTable) 

oDataTable.AcceptChanges()

End Sub

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Nasir Razzaq

Calling the AcceptChanges does not save changes to the database. Check this example

http://www.codeguru.com/csharp/.net/net_data/datagrid/article.php/c13041

John

ASKER

Thanks but that's for the DataGridView although I'm sure it's similar to the C1FlexGrid (from Component One) in the way that it interacts with the database.

I was hoping to avoid having to write a hundred lines of code in order to get the simplest of simplest grid based editors to work.

Nasir Razzaq

You dont have to write a lot of code. All you have to do is supply the Select command, then you can use the CommandBuilder to automatically produce the Insert, Update, and Delete commands for you. Then when you want to commit changes to the db, it only takes a function call

dataadapter.Update(tablename)

John

ASKER

I'm not familiar with the command builder. I will look into it. Thanks.

I guess my problem is that I'm going by examples (provided by Component One) that simply setup a DataTable and assign it to the grid's datasource property. They make no mention of data adapters or readers even though the examples are in VB.NET. Perhaps I'm looking at the wrong examples. I'm coming from ADO in VB6 land with the good old MS/VS FlexGrid ActiveX and so I'm extra confused!

I guess I need to study the code in the first link you sent but it's frustrating having spent so much time on the most trivial task. I was hoping someone could suggest what needs to be added to my code because I've been chasing my tail looking at all sorts of examples like this which led me to post my question here.

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Nasir Razzaq

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John

ASKER

The CommandBuilder worked but the OdbcDataAdapter doesn't have an UpdateAll method so I used oAdapter.Update(oDataTable).