How can i access the nested collection by checking null or not using LINQ with asp.net c# ? As i am getting null exception when there is no mealPlan?
As i am getting null exception when there is no mealPlan?
var hotelRoomBooking = (from n in roomsPart.DefaultIfEmpty()
//where n.roomRates != null
from rates in n.roomRates.DefaultIfEmpty()
//where rates.roomRate != null
from roomR in rates.roomRate.DefaultIfEmpty()
//where roomR.mealPlans != null
from mealP in roomR.mealPlans.mealPlan
//where mealP.value != null
from link in roomR.links.link
select new
{
n.id,
n.rooms.checkInDate,
n.rooms.checkOutDate,`enter code here`
n.rooms.totalCostOfRooms.totalCostInclusive.currency,
roomR.averageNightlyRate.value,
MealPlan = mealP.value != null ? mealP.value : string.Empty,
n.stayDetails.noOfRooms,
n.location.city,
n.location.code
}).ToList();
Yes you'll get NullReferenceException. Try to use join
if you want to exclude rows with null values.
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