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Need to put multiple tables into an OleDbDataAdapter

Posted on 2007-11-22
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Last Modified: 2013-12-16
I have this code working fine.  But I need to access the ZipCode, contained in the ZipCodes table, from the ordersDataSet.  Can I do that?  I had the impression that the SQL comand was creating one big long record by adding the columns from various tables, when the CustomerID and ZipCode match between the tables.  But how do I reference the ZipCode?  The exception I get says the ZipCode is not part of the OrderHeaders table.


Thanks,
newbieweb


                connectString = @"Provider=Microsoft.Jet.OLEDB.4.0;" + @"Data source=" + DataSource + ";Jet OLEDB:Database";

                sql = "SELECT * FROM OrderHeaders, CustomerFiles, ZipCodes WHERE ";
                sql += "OrderHeaders.CustomerID=CustomerFiles.CustomerID AND ";
                sql += "CustomerFiles.ZipCode=ZipCodes.ZipCode";

                if (orderDataAdapter == null || orderDataSet == null)
                {
                    orderDataAdapter = new OleDbDataAdapter(sql, connectString);
                    myOrderHistory = new MyOrderHistory(Handles, this);
                    orderDataSet = new DataSet();
                    orderDataAdapter.Fill(orderDataSet, "OrderHeaders");
                }
                else
                {
                    orderDataSet.Clear();
                    orderDataAdapter.Fill(orderDataSet, "OrderHeaders");
                }
                int numRows = orderDataSet.Tables["OrderHeaders"].Rows.Count;
                int tables = orderDataSet.Tables.Count;
                myOrderHistory.CreateNewOrders(orderDataSet);
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Question by:newbieweb
2 Comments
 
LVL 6

Accepted Solution

by:
-DJL- earned 500 total points
ID: 20336671
Try the SQL statement below.

You need to use the JOIN command if you want the output to be one big table
SELECT * FROM OrderHeaders INNER JOIN CustomerFiles ON (OrderHeaders.CustomerID=CustomerFiles.CustomerID) INNER JOIN ZipCodes ON (CustomerFiles.ZipCode=ZipCodes.ZipCode)

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Author Comment

by:newbieweb
ID: 20336681
I tried this:

orderDataAdapter.Fill(orderDataSet, "OrderHeaders, CustomerFiles, ZipCodes");

and it worked great.

Thanks.
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