Question

I am parsing an Excel workbook and extracting the data into two DataTables like so:

If SetDBConnect("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & filepath & ";
Extended Properties=""Excel 8.0;HDR=Yes;IMEX=1""", True) Then

'Get total dollars table
 sql.Append("SELECT * FROM [" & totalDollars & "]")
 dt = _dh.GetTable(sql.ToString())

sql.Length = 0
sql.Append("SELECT * FROM [" & totalUnits & "]")
dt_units = _dh.GetTable(sql.ToString())
End If

The two spreadsheets are exactly the same with one difference. In the “Total Dollars” spreadsheet, there is a column with the dollar amounts, where in the “Total Units” spreadsheets, it is instead a column with unit amounts.

I would like to INNER JOIN these two tables WHEN the tableA.UPC = tableB.UPC. Is this possible? I have read about DataSets and DataRelations, but I was wondering if there was a simpler approach?

Thanks!

Answer 1

A simple approach using Linq would be:

var query = from c in dt.AsEnumerable()
            join r in dt_units.AsEnumerable() 
            on c.Filed<string>("UPC") equals r.Field<string>("UPC")
            select new {
                  UPC= r.Field<string>("UPC"),
                  //and so on.. you pick whatever columns you need from each table
            }