Question

I have been playing with the Linq to Sql and I was wondering if it was possible to get a single result out? For example, I have the following:

using(DataClassContext context = new DataClassContext()) {    var customer = from c in context.table                   where c.ID = textboxvalue                   select c; } 

And with this I need to do a foreach around the var customer but i know that this will be a single value! Anyone know how I could do a textbox.text = c.name; or something along that line?

Answer 1

Yes, it’s possible.

using(DataClassContext context = new DataClassContext()) { var customer = (from c in context.table where c.ID = textboxvalue select c).SingleOrDefault(); } 

This way you get 1 result or null if there isn’t any result.

You can also use Single(), which throws an exception when there isn’t a result. First() will give you only the first result found, where Last() will give you only the last result, if any.

Here’s an Overview of all Enumerable methods.