LINQ syntax where string value is not null or empty
linq, linq-to-sql
Solution
http://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=367077
Problem Statement It's possible to write LINQ to SQL that gets all rows that have either null or an empty string in a given field, but it's not possible to use string.IsNullOrEmpty to do it, even though many other string methods map to LINQ to SQL. Proposed Solution Allow string.IsNullOrEmpty in a LINQ to SQL where clause so that these two queries have the same result:
var fieldNullOrEmpty =
from item in db.SomeTable
where item.SomeField == null || item.SomeField.Equals(string.Empty)
select item;
var fieldNullOrEmpty2 =
from item in db.SomeTable
where string.IsNullOrEmpty(item.SomeField)
select item;
Other Reading: 1. DevArt 2. Dervalp.com 3. StackOverflow Post
Problem
I'm trying to do a query like so... ``` query.Where(x => !string.IsNullOrEmpty(x.PropertyName)); ``` but it fails... so for now I have implemented the following, which works... ``` query.Where(x => (x.PropertyName ?? string.Empty) != string.Empty); ``` is there a better (more native?) way that LINQ handles this? EDIT apologize! didn't include the provider... This is using LINQ to SQL