Question

I have the following code

DateTime now = DateTime.UtcNow;

var allItemsOver64 = _inventoryContext.Items.Where(i => 
   (SqlFunctions.DateDiff("dd", i.PrimaryInsured.DoB, now) / 365.0) >= 65);

IQueryable<Item> items65To69 = allItemsOver64.Where(i =>
   (SqlFunctions.DateDiff("dd", i.PrimaryInsured.DoB, now) / 365.0) >= 65 &&
   (SqlFunctions.DateDiff("dd", i.PrimaryInsured.DoB, now) / 365.0) <= 69);

But when I try and use allItemsOver64 thus Items65To69.Count() I get this error

The expression
((((Convert(DateDiff(“dd”, [10007].PrimaryInsured.DoB, 26/04/2012 15:03:09)) / 365) >= 65)
And
((Convert(DateDiff(“dd”, [10007].PrimaryInsured.DoB, 26/04/2012 15:03:09)) / 365) >= 65))
And
((Convert(DateDiff(“dd”, [10007].PrimaryInsured.DoB, 26/04/2012 15:03:09)) / 365) <= 69))
is not supported.

What am I doing wrong?

Answer 1

Maybe you could try using EntityFunctions rather than SqlFunctions.