如何检查该值为null [英] How to check the value is null

问题描述

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();
}

我的尝试：



如何检查值为null

What I have tried:

How to check the value is null

推荐答案

试试这个：

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();
}

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();
}

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