TAILIEUCHUNG - Asp.Net 3.5 In Simple Steps- P19

In Simple Steps- P19:This is a book that helps you to learn using Visual Studio 2008. Precision, an easy-to-understanding style, real life examples in support of the concepts, and practical approach in presentation are some of the features that make the book unique in itself. The text in the book is presented in such a way that is equally helpful to beginners as well as professionals. | Chapter 9 Inducing Language-Integrated Query The Partioning Operators The partitioning operators in LINQ arc used to divide an input sequence into two sections without rearranging the elements and then returning the result set with one of the sections which satisfies the given condition. The TakeO SkipO TakeWhileO and SkipWhileO methods are referred to as the partitioning operators. The TakeO method takes the elements up to a specified position in a sequence. The TakeWhileO method takes the elements based on the specified function until an element does not satisfy the given condition. The SkipO method skips elements up to the specified position in the sequence. The SkipWhileO method skips the elements based on the given function until an element does not satisfy the given condition. The Join Operators The join operators in LINQ are used to join objects in one data source with objects that share a common attribute in another data source. The join operators provided in LINQ are the Join clause and the GroupjoinO method. The Join clause implements an inner join which is the type of join in which only those objects that have a match in other data sets are returned. The GroupjoinO method joins two sequences based on a keyselector function and groups the results. Let s create a website JoinOperator where you can use the Join clause by performing the following steps 1. Repeat steps 1 to 3 as discussed earlier while creating the LINQQuery application in the Executing a Simple LINQ Query section. 2. Specify the name of the website as JoinOperator and click he OK button. 3. Add a ListBox control and a Button control to the design view of the Web Form and change the Text property of the Buttonl to Join Data. 4. Replace recode in the code-behind file of the JoinOperator application as given in Listing Lising 197 in Simple Steps 5. Press the F5 key to run ihe application. The output of the website after clicking the Join Data button is shown .

• Cơ sở dữ liệu
• giáo trình Mysql cơ bản
• hệ quản trị cơ sở dữ liệu
• giáo trình cơ sở dữ liệu
• cơ sở dữ liệu sql server
• cơ sở dữ liệu oracle
• MySQL Administrators Bible P6 quản trị cơ sở dữ liệu
• MySQL cơ bản
• bảo mật cơ sở dữ liệu