Question

I’ve got the following LINQ query.

    // Query the database
    IEnumerable<BestSeller> best_sellers = from bs in (db.smd_group)
                                           where bs.COMPANY == "SMD Textiles"
                                           where bs.DOCDATE > six_months_back
                                           where bs.CUSREF == customer.customer_ref
                                           group bs by bs.PRODCODE into g
                                           orderby g.Sum(x => x.MQTY) descending
                                           select new BestSeller()
                                           {
                                               product_code = g.Key.Trim(),
                                               total_quantity = Convert.ToString(g.Sum(x => x.MQTY)),
                                               // ERROR Occurs when the following line is removed
                                               //product_description = g.First().prd_prddes
                                           };

    // Get the top 25 products
    top25 = best_sellers.Take(25);

As you can see, I have commented out a line where my BestSeller objects are created.

I wish to set the product_description within my BestSellerobject. So I added the line `below:

product_description = g.First().prd_prddes

“prd_prddes” is the name of the column which holds our product description.

However, as soon as I add this line to my query I get a strange error:

Invalid column name ‘PRODCODE’.

Invalid column name ‘PRODCODE’.

Invalid column name ‘PRODCODE’.

Description: An unhandled exception occurred during the execution of
the current web request. Please review the stack trace for more
information about the error and where it originated in the code.

Exception Details: System.Data.SqlClient.SqlException: Invalid column
name ‘PRODCODE’. Invalid column name ‘PRODCODE’. Invalid column name
‘PRODCODE’.

The column name PRODCODE clearly isn’t invalid, because it works just fine if I remove the product_description line.

It’s very peculiar…

Answer 1

It looks like whatever you have in g doesn’t have a column named 'PRODCODE'

Personally, What I would do, is I’d just select g in your select statement, and then I’d make a break-point and use the debugger see what’s in it.