Question

I have defined the following Model

  public class TodayOrder
{
    public string ID_ORIG { get; set; }
    public string PART_ID { get; set; }
    public string PART_DEX { get; set; }
    public double TimeSecs { get; set; }
 }

and now I am trying to populate a List using the following Linq expression:

var todaysOrders = DCC.vw_ORD_GP_volumes_lastSets
 .Where(a => a.ID_ORIG == id_orig.ToUpper() && 
             a.PART_ID == Part.ToUpper())
 .Select(a => 
     new TodayOrder{ 
         ID_ORIG = a.ID_ORIG, 
         PART_ID = a.PART_ID, 
         PART_DEX = a.PART_DEX,  
         TimeSecs = a.ReqTime.GetValueOrDefault().TotalSeconds });

List<TodayOrder> lst = todaysOrders.ToList();

where ReqTime is of type TimeSpan?.

The problem is that at runtime I am getting an error Value has no literal in SQL: 00:00:00 – looks like there is a problem with the TimeSpan.

 Line 72:                     });
 Line 73:   ERROR>              lst = todaysOrders.ToList();
 Line 74:  
 [InvalidOperationException: Value has no literal in SQL: 00:00:00]
  System.Data.Linq.SqlClient.Visitor.FormatValue(Object value) +584911
  System.Data.Linq.SqlClient.Visitor.VisitValue(SqlValue value) +32

In facts, if I comment out the line setting the property TimeSecs everything is working fine.

What would be the right approach to instantiate the TodayOrder class instances?

Answer 1

The problem is that Linq-to-Sql treis to translate the expression a.ReqTime.GetValueOrDefault().TotalSeconds to sql but it fails.

You can solve it by evaluating the query with a ToArray() before the select and do the select on the client side:

var todaysOrders = DCC.vw_ORD_GP_volumes_lastSets
 .Where(a => a.ID_ORIG == id_orig.ToUpper() && 
             a.PART_ID == Part.ToUpper())
 .ToArray()
 .Select(a => 
     new TodayOrder{ 
         ID_ORIG = a.ID_ORIG, 
         PART_ID = a.PART_ID, 
         PART_DEX = a.PART_DEX,  
         TimeSecs = a.ReqTime.GetValueOrDefault().TotalSeconds });