Visual Basic

Get Visual Basic in 12 Easy Lessons PDF

By Greg M. Perry

ISBN-10: 0672309475

ISBN-13: 9780672309472

If you are a starting programmer, visible simple four in 12 effortless classes, moment version is your excellent publication. It explains how you can commence writing visible simple four courses, and springs with the software program had to run them. you are guided step-by-step during the studying technique. cease & kind helps you to comprehend whilst to begin visible uncomplicated and check out a pattern application. Real-world analogies and examples make studying effortless. Full-color, tear-out cheat sheet info syntax and constitution. overview sections supply pattern courses. Coding information, notes, and warnings express what to prevent. Line-by-line reasons assist you higher comprehend code. international reviews educate the massive photo of coding innovations and methods. each pattern application comprises 3 sections: enter (the code you enter), output (the effects you get), and research (a entire explanation). every one lesson has 3 parts-two devices and a evaluate project-for ease of use. CD-ROM comprises the software program to run the courses you create.

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The following code shows how you can execute a stored procedure that takes a single string parameter. ExecuteReader("ListOrdersByState", _ New Object() {"Colorado"}) DisplayRowValues(reader) End Using The example named Return rows using a stored procedure with parameters uses this code to query the sample database, and generates the following output. much a do a bout data access Id = 1 Status = DRAFT CreatedOn = 01/02/2009 11:12:06 Name = Adjustable Race LastName = Abbas FirstName = Syed ShipStreet = 123 Elm Street ShipCity = Denver ShipZipCode = 12345 ShippingOption = Two-day shipping State = Colorado Id = 2 Status = DRAFT CreatedOn = 03/02/2009 01:12:06 Name = All-Purpose Bike Stand LastName = Abel FirstName = Catherine ShipStreet = 321 Cedar Court ShipCity = Denver ShipZipCode = 12345 ShippingOption = One-day shipping State = Colorado Reading Rows Using Queries with Named Parameters The technique in the previous example of supplying just an array of parameter values is easy and efficient, but has some limitations.

For full details of all of the settings that you can specify, see the documentation installed with Enterprise Library for that block. 7. To delete a section or provider, right-click the section or provider and click Delete on the shortcut menu. To change the order of providers when more than one is configured for a block, right-click the section or provider and click the Move Up or Move Down command on the shortcut menu. welcome to the libr a ry 8. To set the default provider for a block, such as the default Database for the Data Access block, click the down-pointing double arrow icon next to the block name and select the default provider name from the drop-down list.

Configuration Depending on how you decide to work with Enterprise Library in terms of instantiating the objects it contains, you may need to import two more namespaces. We’ ll come to this when we look at object instantiation in Enterprise Library a little later in this chapter. You will also need to import the namespaces for the specific application blocks you are using. Most of the Enterprise Library assemblies contain several namespaces to organize the contents. For example, as you can see in Figure 3, the main assembly for the Logging block (one of the more complex blocks) contains a dozen subsidiary namespaces.

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Visual Basic in 12 Easy Lessons by Greg M. Perry


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