LINQ study notes [continuously updated]

1. C # in System.Environment.NewLine ::: acquired defined for this environment newline character string

2.db.Log = Console.Out; generating a log output display LINQ to SQL generated SQL commands. This logging feature (using the Log ) helpful for debugging, and help to determine whether the commands sent to the database accurately represent your query.

3.column properties DbType = "Int NOT NULL IDENTITY" IsDbGenerated = true generated automatically without setting

4 represents a foreign key: [Association (Storage = "_Customer", ThisKey = "CustomerID")]

5. Create a strongly typed view of the database

  之前：DataContext db = new DataContext (@"c:\linqtest5\northwnd.mdf");
                                      // Get a typed table to run queries.
                                     Table<Customer> Customers = db.GetTable<Customer>();

 just now:

         添加： public class Northwind : DataContext
       　　　　 {
       　　　　　　 public Table<Customer> Customer;
        　　　　　　public Table<Order> Orders;
       　　　　　　 public Northwind(string connection) : base(connection) { }
    　　　　　　}

         It is used: Northwind db = new Northwind (@ "C: \ linqtest5 \ northwnd.mdf"); to;

 

Reproduced in: https: //www.cnblogs.com/gorgeous1314/archive/2012/07/28/2613255.html