Question

In VisualStudio 2008 I get the following error on my linq query:

cannot convert sourcetype ‘System.Linq.IQueryable’ to target type ‘string’

This is the query:

  var query = (from c in model.ITEMLIST
               select new ItemList
                        {
                          LineNo = c.LINE_NO,
                          SupplierName = from s in model.VENDOR where s.ID == c.ID_VENDOR select s.NAME
                                                     });

If I run the same query in LinqPad it returns with success the expected result

I am using LinqToEntity for this.
In another project where I am using LinqToSql I have a similar query which runs fine.

Answer 1

Your problem is this line

SupplierName = from s in model.VENDOR where s.ID == c.ID_VENDOR select s.NAME

SupplierName is a string but the right hand side is a query. Try assigning the only result in the query instead.

SupplierName = 
    (from s in model.VENDOR where s.ID == c.ID_VENDOR select s.NAME).Single()

---

or, in the style I prefer

SupplierName = model.VENDOR.Single(v => v.ID == c.ID_VENDOR).NAME;