Question

I’m using a select method on a dataset to retreive the results that match my condition:

foreach (DataRow dr in dsPone2.Tables["tt-pone"].Select(strWhereCondition))
{
    dsPone.Tables["tt-pone"].ImportRow(dr);
}

How do I change the strWhereCondition from

strWhereCondition += " AND poneid = 0 and aoneid = 0 and tranid = 0";

To where tranid is NOT 0?

Do I use <> or !=?

Answer 1

As is so often the case, consulting the documentation is the way forward. DataTable.Select(string) redirects to DataColumn.Expression to document what’s allowed in a filter expression – and the “Operators” list shows <> but not !=.

Personally I would try to avoid string-based filtering and use LINQ to DataSet instead, but of course that requires .NET 3.5 or higher.