Question

In my project I need to select one row values using linq

try
{
return database.Employees.Where(x => id.Equals(x.ID)).Single();
}
catch (InvalidOperationException Ix)
{
    throw;
}

using that I will get corresponding row values through entity object.But it is throwing an error if the result set is empty.The problem is in my project Exception is must to be logged.
How can I manage this code with out going to exception.

Answer 1

You’re using Single() which is documented to throw an exception if there are no results. If you don’t want that behaviour, don’t use that method 🙂

If you use SingleOrDefault() it will return null if there are no results. It will still throw an exception if there are multiple results, however. Alternatively you could use FirstOrDefault to avoid this.

Note that you can specify a predicate in Single / SingleOrDefault as well, so you don’t need a Where call first:

return database.Employees.SingleOrDefault(x => id.Equals(x.ID));