Question

Whichever way I do it, it seems something goes wrong when using the conditional operator on enum values in Linq to Sql. For example

var ret = from listings in db.Listings   select new Listing    {    ID = listings.ID,    //etc    OrderStatus = listings.OrderItems.Count > 0     ? listings.OrderItems.First().Order.OrderStatus : OrderStatus.NotCheckedOut }; 

System.Data.SqlClient.SqlException: Conversion failed when converting the nvarchar value ‘Charged’ to data type int..

When I leave the enum field as nvarchar mapped to a string I get similar conversion errors. How to workaround this ?

Answer 1

This works, maybe there’s a better way though ?

var ret = from listings in db.Listings let ordS = listings.OrderItems.Count > 0 ?                          listings.OrderItems.First().Order.OrderStatus.ToString() : OrderStatus.NotCheckedOut.ToString()   select new Listing    {    ID = listings.ID,    //etc    OrderStatus = (OrderStatus)Enum.Parse(typeof(OrderStatus), ordS) };