Best way of constructing dynamic sql queries in C#/.NET3.5?

Question

A project I\'m working on at the moment involves refactoring a C# Com Object which serves as a database access layer to some Sql 2005 databases.

The author of the existe

Answer 1

I used C# and Linq to do something similar to get log entries filtered on user input (see Conditional Linq Queries):

IQueryable matches = m_Locator.Logs;

// Users filter
if (usersFilter)
    matches = matches.Where(l => l.UserName == comboBoxUsers.Text);

 // Severity filter
 if (severityFilter)
     matches = matches.Where(l => l.Severity == comboBoxSeverity.Text);

 Logs = (from log in matches
         orderby log.EventTime descending
         select log).ToList();

Edit: The query isn't performed until .ToList() in the last statement.