Entity Framework 6 + C# passing a combobox.SelectedValue as a parameter for context.CreateQuery something simple i am missing?

Question

ObjectContext context = ((IObjectContextAdapter)db).ObjectContext; 
string queryString = @\"SELECT VALUE c FROM Product AS c WHERE c.ProductType = \" + comboBox1.Selecte         


        

Answer 1

You have to add a parameter to your query, that is:

var context = ((IObjectContextAdapter)db).ObjectContext;

var queryString = @"SELECT VALUE c FROM Product AS c WHERE c.ProductType = @productType";

var productQuery = context.CreateQuery(queryString, new ObjectParameter("productType", comboBox1.SelectedValue);