SQL Server 2008 R2和Windows窗體應用程序

Question

我創建了一個本地數據庫和一個Windows窗體。在窗體中，在服務器資源管理器中，我添加了該數據庫的連接。現在，我該如何開始使用LINQ to SQL來查詢它？

Answer 1

您是否設置了DataContext？這是LINQ查詢和數據庫連接之間的典型對象。從上面的鏈接

示例代碼：

// DataContext takes a connection string. 
DataContext db = new DataContext(@"c:\Northwnd.mdf"); 

// Get a typed table to run queries. 
Table<Customer> Customers = db.GetTable<Customer>(); 

// Query for customers from London. 
var query = 
    from cust in Customers 
    where cust.City == "London" 
    select cust; 

foreach (var cust in query) 
    Console.WriteLine("id = {0}, City = {1}", cust.CustomerID, cust.City);