IEnumerable T Property as parameter in Lambda Expression

Question

Hi,
I have following construction which returns selected items from the list:
public IEnumerable<Country> SelectedProducts
get
return this.Countries.Where(c => c.ContinentName.Equals("Product Catalog") && c.IsSelected);
}The following construction foreach (Country c in SelectedProducts)
MessageBox.Show(c.ProductName.ToString());
returns product names for selected products in list. How can I use SelectedProducts and pass the same into lambda expression to retrieve data from database. Since it contains multiple values it should be used something like with IN expression in T-SQL
or not. Please help in order to get this working.
Thanks in advance.
Almir

Answer 1

Hello Barry,
I converted Selectedproducts
 public
IEnumerable<Country>
SelectedProducts
            get
return this.Countries.Where(c
=> c.ContinentName.Equals("Product
Catalog") && c.IsSelected); 
to string[] array using construct SelectedProductsToString and then pass it to where clause as it is shown in ShowSelected() method.
private string[] SelectedProductsToString
get
return SelectedProducts.Select(c => c.ProductName.ToString()).ToArray();
public void ShowSelected()
var result = Fact.Where(c=> SelectedProductsToString.Contains(c.ProductName));
Do you think it's ok from your point of view or should consider something else.
Thanks for your opinion.
Regards.
Almir