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copied!<p>Neither of these answers so far is quite what I'm looking for. To give an example of what I'm aiming at (I don't regard this as a complete answer either), I took the above code and created a couple of extension methods:</p> <pre><code>static public IQueryable<Activity> AddCondition( this IQueryable<Activity> results, DropDownList ddl, Expression<Func<Activity, bool>> containsCondition) { if (!string.IsNullOrEmpty(ddl.SelectedItem.Text)) results = results.Where(containsCondition); return results; } static public IQueryable<Activity> AddCondition( this IQueryable<Activity> results, CheckBox chk, Expression<Func<Activity, bool>> emptyCondition) { if (chk.Checked) results = results.Where(emptyCondition); return results; } </code></pre> <p>This allowed me to refactor the code above into this:</p> <pre><code>results = results.AddCondition(ddlFileName, x => x.FileName.Contains(ddlFileName.SelectedValue)); results = results.AddCondition(chkFileName, x => x.FileName == null || x.FileName.Equals(string.Empty)); results = results.AddCondition(ddlIPAddress, x => x.IpAddress.Contains(ddlIPAddress.SelectedValue)); results = results.AddCondition(chkIPAddress, x => x.IpAddress == null || x.IpAddress.Equals(string.Empty)); </code></pre> <p>This isn't <em>quite</em> as ugly, but it's still longer than I'd prefer. The pairs of lambda expressions in each set are obviously very similar, but I can't figure out a way to condense them further...at least not without resorting to dynamic LINQ, which makes me sacrifice type safety.</p> <p>Any other ideas?</p>

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