Problem using LINQ to SQL and defaultifempty()

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Hiya

I am getting the following error when running my code. The code is:

C#

var list= (from list in dc.tblList
                          where list.listID == listID
                          select (list.aspnet_User.aspnet_Membership.Email)).DefaultIfEmpty();

if (list != null)
        {
             //insert code here
        }

Which produces the following error:

Could not format node 'OptionalValue' for execution as SQL.

Can anyone help?!

Posted 18-Feb-12 4:19am

Scrappy 1871

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esmailian · Answer 1 · 2012-02-18T04:45:00

Solution 1

try this :

C#

var list= (from list in dc.tblList
                          where list.listID == listID
                          select (list.aspnet_User.aspnet_Membership.Email)).First();

Posted 18-Feb-12 4:45am

esmailian

Comments

Scrappy 1871 18-Feb-12 10:49am

That'll only provide the first element. What I want to be able to do is if the list is empty, be null, otherwise give me the list of related data.

Scrappy 1871 · Answer 2 · 2012-02-18T08:04:00

Solution 2

I used a .count(); to get the amount of records, and then an if statement with the condition if > 0 do... which has solved it. Probably easier ways but that's the one I've gone with!

Posted 18-Feb-12 8:04am

Scrappy 1871