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c#linqnull-conditional-operator

LINQ: Search multiple fields of a List of objects where fields can be null

I am trying to filter a list of objects using a multi field search box. It takes the text, then applies the search to the list. However, address 2 and 3 could potentially be blank (and in this case null in the objects the list is made up of) depending on the address submitted.

I have the following expression.

Properties.Where(x => x.Address1.ToLower().Contains(senderElement.Text) 
                  || x.Address2.ToLower().Contains(senderElement.Text) 
                  || x.Address3.ToLower().Contains(senderElement.Text))
          .ToList();

Its currently throwing an exception because it, quite rightly so, can't search a null field.

How can i get it to skip or ignore null fields? Can it be done in a single expression?

Solution

  • You can add some null check like this

    (x?.Address1?.ToLower()??"").Contains(senderElement?.Text??"")