Saving collection back to it's database table. vb 2005


IDE : VS 2005,
Platform : .NET 2.0,

Hey all I have a collection class that is populated from a SQL database.


Code: Public Class LocalAuthorityList
Inherits ComponentModel.BindingList(Of LocalAuthority)
#Region " Public Methods"
Public Shared Function Create(ByVal userid As Integer) As LocalAuthorityList
Dim userlacoll As LocalAuthorityList
userlacoll = New LocalAuthorityList



Dim dt As DataTable
dt = CAPSDAC.DAC.ExecuteDataTable("GetListOfLocalAuthoritiesbyUserID", DAC.Parameter("@UserID", userid))

For Each dr As DataRow In dt.Rows

With dr

userlacoll.Add(LocalAuthority.Create(dr))

End With

Next

Return userlacoll

End Function
#End Region
End Class


I have a form with a datagridview that is linked to a datasource of type object, specifically the LocalAuthorityList collection.

In the form's Load method I instantiate the collection and bind to the datasource like this:

Code: Me.LocalAuthorityListBindingSource.DataSource = LocalAuthorityList.Create(CAPSUserListCollectionDataGridView.Rows(0).Cells.Item("UserID").Value)


Note that the Datasource is a colection object, NOT a datatable.

How on earth do I go about saving any changes the user made in the datafridview back to the database?
Do I have to loop through every row and call and update query for each row, can I do it as a 1 step thing?





source :http://www.vbcity.com

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