Menu
SingleOrDefault returns null, but what if I want to assign values to represent the object that wasn't found?
536
The default value for reference and nullable types is null . The SingleOrDefault method does not provide a way to specify a default value. If you want to specify a default value other than default(TSource) , use the DefaultIfEmpty<TSource>(IEnumerable<TSource>, TSource) method as described in the Example section.
When you want an exception to be thrown if the result set contains many records, use Single or SingleOrDefault. When you want a default value is returned if the result set contains no record, use SingleOrDefault. When you always want one record no matter what the result set contains, use First or FirstOrDefault.
SingleOrDefault() – Same as Single(), but it can handle the null value. First() - There is at least one result, an exception is thrown if no result is returned. FirstOrDefault() - Same as First(), but not thrown any exception or return null when there is no result.
SingleOrDefault() will return null (or default of the type) if nothing exists but will throw exception if you have more than one match.
you can do something like
myStrings.DefaultIfEmpty("myDefaultString").Single()
check out here
184
?? operator. If the left argument is null, evaluate and return the second argument.
myCollection.SingleOrDefault() ?? new[]{new Item(...)}
This will only work with reference types (or nullables), but it would do what you're looking for very simply.
35
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
