组件对象模型教程?

• string columnName = db.Tables["Customers"].Columns["customer_number"].Name;

public DataTable this[string tableName] { ... }
//     ^^^^^^^^^
//     choose one, unspecific type for all exposed collections

public IList<Customer> Customers { get { ... } }
public IList<Supplier> Suppliers { get { ... } }
//           ^^^^^^^^
//           the right type for each collection

public class Db
{
    public IList<Customer> Customers { get { ... } }
    ...
}

• Customers

• Customer db.Customers

private List<Customer> customers = new List<Customer>();
// ^ for class-internal use only

public IList<Customer> Customers { get { return this.customers.AsReadOnly(); } }
//                                                            ^^^^^^^^^^^^^
//                                                expose collection as read-only

• db DataTable ICollection

• Suppliers

db.Customers["John Smith"].BillingAddress

db.Tables["Customers"].Rows["John Smith"].Columns["BillingAddress"] as Address

BillingAddress

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