How to check the value is null

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C#

using (var db = new AppsDb())
{
    //get the corresponding name in Division. 
    division = (from obs in db.BibleMaster.AsNoTracking()
                select new CommonCustomLookUp { DisplayText = obs.Division}).ToList();
}

What I have tried:

How to check the value is null

Posted 15-Jan-17 22:32pm

Member 12766235

Updated 16-Jan-17 0:27am

#realJSOP

v2

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F-ES Sitecore 16-Jan-17 4:38am

Which value?

Member 12766235 16-Jan-17 4:41am

division value

F-ES Sitecore 16-Jan-17 4:48am

if (division == null || division.Count == 0)

Richard Deeming 16-Jan-17 10:59am

You have two things called Division in your code sample.

As far as I'm aware, it's not possible for the result of the query expression to be null. If there are no matching records, the result will be an empty sequence.

Do you want to exclude records where obs.Division is null?

2 solutions

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Mehdi Gholam · Answer 1 · 2017-01-16T00:20:00

Solution 1

Try this:

using (var db = new AppsDb())
{
    //get the corresponding name in Division. 
    var data = from obs in db.BibleMaster.AsNoTracking()
                select new CommonCustomLookUp { DisplayText = obs.Division};
               
    if(data!=null)
       division = data.ToList();
}

Posted 16-Jan-17 0:20am

Mehdi Gholam

Comments

Richard Deeming 16-Jan-17 10:56am

I don't think it's possible for the result of a query expression to be null. If there are no matching records, the result will be an empty sequence.

Vinay Kale · Answer 2 · 2017-01-16T00:27:00

Solution 2

using (var db = new AppsDb())
{
    //get the corresponding name in Division. 
    var data = from obs in db.BibleMaster.AsNoTracking()
                select new CommonCustomLookUp { DisplayText = obs.Division};

    //Considering Division is of type String.           
    if(!String.IsNullOrEmpty(data))
       division = data.ToList();
}

Posted 16-Jan-17 0:27am

Vinay Kale

Comments

Richard Deeming 16-Jan-17 10:55am

Wrong.