linq to sql server tutorial c

... hình hóa CSDL dùng LINQ to SQL: Visual Studio “Orcas” đã tích hợp thêm một trình thiết kế LINQ to SQL như một c ng c dễ dàng cho vi c mô hình hóa một c ch tr c quan c c CSDL dùng LINQ to SQL. ... 4. Gắn nối c c câu truy vấn LINQ to SQL vào c c control LINQ to SQL C c câu truy vấn LINQ trả về kết quả mà nó sẽ implement interrface IEnumerable – đây c ng là interface mà c c control ASP.NET ... phép th c hiện tất c c c công vi c này một c ch c c kỳ sáng sủa theo phong c ch hướng đối tượng. 4. Transactions Một transaction (giao dịch) là một dịch vụ đư c cung c p bởi một CSDL (ho c một...

Ngày tải lên: 12/01/2013, 16:18

... catch (ChangeConflictException) { foreach (var conflict in context.ChangeConflicts) { conflict.Resolve(RefreshMode.KeepCurrentValues); foreach (var memberConflict in conflict.MemberConflicts) ... (CourseManagementDataContext context ) { ChangeSet changeSet = context.GetChangeSet(); //changeSet.Deletes, changeSet.Inserts, changeSet.Updates try { context.SubmitChanges(ConflictMode.ContinueOnConflict); ... translates it to a WHERE on the discriminator column / /LINQ: var cars = from car in context.GetTable<Vehicle>() .OfType<Car>() select car; / /SQL: WHERE ([t0].[Discriminator] = @p0)...

Ngày tải lên: 12/01/2013, 16:18

Ngày tải lên: 06/08/2013, 17:30

Ngày tải lên: 06/08/2013, 17:33

... results = From cu In context.Customers Order By cu.FullName Select CustomerID = cu.ID, CustomerName = cu.FullName End Using Except for the replacement of an ObjectContext by a DataContext, this ... for processing SQL Server data. This chapter focuses on the LINQ to SQL provider and the benefits it supplies to your data- focused application. In many ways, LINQ to SQL feels like LINQ to Entities, ... returning a financial amount. Dim result = From cu In context.Customers Select cu.ID, cu.FullName, context.AgedInvoices(cu.ID, 90) Order By cu.FullName You can also call these functions directly, as...

Ngày tải lên: 03/10/2013, 00:20

... Connect to SQL Server from ASP.NET using Windows Authentication in SQL Server. Discussion Connecting to a SQL Server database provides two different authentication modes: Windows Authentication ... LiB ] Recipe 1.8 Connecting to SQL Server Using Integrated Security from ASP.NET Problem You want to coordinate Windows security accounts between an ASP.NET application and SQL Server. Solution ... authenticating a connection. SQL Server Authentication Uses a SQL Server login account providing a user ID and password. Integrated security requires that the SQL Server is running on the same computer...

Ngày tải lên: 24/12/2013, 05:15

... The native protocol of Novell Netware networks. TCP/IP Sockets [ Team LiB ] Recipe 1.6 Using an IP Address to Connect to SQL Server Problem You want to connect to a SQL Server using its ... protocol. Multiprotocol Automatically chooses the first available network protocol to establish a connection generally with performance comparable to using a native network library. TCP/IP ... 2000 include: AppleTalk ADSP Allows Apple Macintosh to communicate with SQL Server using native AppleTalk protocol. Banyan VINES Supports Banyan VINES Sequenced Packet Protocol (SPP) across...

Ngày tải lên: 21/01/2014, 11:20

... escaped, so SQL names need some way of separating words. One could write customerAccounts, CustomerAccounts, customer_Accounts or Customer_Accounts. Yes, you need to make up your mind. Desktop databases, ... object browser, and can be imported into applications such as Sand- castle to convert them into Help files. Of course, you can transform an XMLDOCS file into anything you choose with XSL. Microsoft's ... six characters at the most. SQL 92 allows 18 characters, but SQL Server has no practical limit, though you must keep it under 128 characters. 23 Chapter 1: Writing Readable SQL The ISO ODBC standard...

Ngày tải lên: 08/03/2014, 22:20