Download ADO.NET: From Novice to Pro, Visual Basic .NET Edition by Peter Wright PDF

By Peter Wright

Designed to get programmers as much as specialist degrees as quickly as attainable, ADO.NET: From amateur to Pro is aimed toward builders who've very little .NET or ADO.NET adventure, in addition to programmers who're no longer but happy with database programming. Best-selling writer Peter Wright painlessly strikes readers from easy database entry to the subtle manipulation of XML documents.

The ebook starts off by way of displaying you the elemental structure of ADO.NET, after which provide you with the instruments you will have to paintings with information services and the relationship, Command, and DataSet gadgets. Wright then drills down into the themes which are crucial for you as a qualified developer to appreciate, together with transactions, concurrency, typed DataSets, and using XML with ADO.NET.

Through a variety of hands-on examples and dealing code that's adaptable to person initiatives, you will the way to create quick and strong ADO.NET firm functions. via the top of this ebook, you can paintings at a qualified point using Microsoft's strongest data-access technology.

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Extra resources for ADO.NET: From Novice to Pro, Visual Basic .NET Edition

Example text

There are actually four execute methods attached to a Command object. ExecuteScalarO is used for those queries and stored procedures that return a single result code, much like a typical function in any programming language. Since all results from a database can be treated as rows of data, ExecuteScalarO returns the first column of the first row of the result of the query as a generic object. ExecuteNonQueryO, as its name suggests, is used to execute code on the server that is not a query. Typically, this would be an Update, Insert, or Delete call, or a stored procedure that actually affects data.

Console The two Import lines at the top of the module bring in the namespaces that you're going to work with; without them, the code would be much larger, as you'd need to fully qualify each and every object you use with its namespace. WriteLineO. That soon gets tedious, hence the Imports. NET Code database. As I mentioned before, this object is part of the data provider, and since you're using the SQL Server data provider, the Connection object you need is of type SqlConnection. If you were working with the OLE DB data provider, then that line would have created an OleDbConnection.

Just right -click the Views heading in the Server Explorer and select New View from the pop-up menu that appears. NET will instantly present you with a table select dialog box similar to the one you saw when you built the database diagram earlier. Select the tables that you want to pull data from in your view and the IDE will change to show those tables, with their relationships drawn in. Figure 1-11. NET is both powerful and simple to use. Notice how each column in the selected tables has a check box to the left of its name.

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