asked on

Saving Dataset changes back to database using vb.net

I am trying to save changes that I have made to a dataset/data table back to the database. I am populating the data table as follows:

Dim cn As New SqlConnection(Global_Values.sConn)
Dim da As New SqlDataAdapter(sSQL, cn)
Dim ds As New DataSet

If cn.State = System.Data.ConnectionState.Closed Then
cn.Open()
End If

Dim x_Age As String

da.Fill(ds, "search_result")

For Each row As DataRow In ds.Tables("search_result").Rows
row("Age") = Calc_Age(row("Date_Of_Birth")) <----- calls function to calc age
row.AcceptChanges()
Next row

now how do I update the records in the database with the changes I just made? Each row has a unique column named Rec_ID. The column in the database that I want to update for each record is Age.

Ant help would be appreciated as I am new to this.

Shaun Kline

Here is one method: http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqlcommandbuilder(v=vs.110).aspx

It uses a SqlCommandBuilder object that builds the insert, update and delete SQL statements based on the query used to build the select statement.

Shaun Kline

Another option is to create a SQLCommand object for your update statement and attach it to the UpdateCommand property of your SQLDataAdapter. Example here: http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqldataadapter.updatecommand(v=vs.110).aspx

Mike_Stevens

ASKER

Where do I call da.UpdateCommand? From within the loop or after the loop when all of the records have been updated?

ASKER CERTIFIED SOLUTION

Shaun Kline

membership

This solution is only available to members.

To access this solution, you must be a member of Experts Exchange.

Start Free Trial

Mike_Stevens

ASKER

got it! Thanks for the help