How do I concatenate strings in Entity Framework Query?

Question

How do I concatenate strings in Entity Framework 4 I have a data from a column and I want to save as a string a comma separated string like \"value1, value2, value3\" Is the

Answer 1

You have to execute the query before projecting. Otherwise EF tries to translate the Join method into SQL (and obviously fails).

var results = this.context
                  .Farms
                  .ToList()
                  .Select(f => new
                      {
                          f.Id, 
                          Fruits = string.Join(", ", f.Fruits)
                      });