By Peter Wright
Designed to get programmers as much as expert degrees as quickly as attainable, ADO.NET: From amateur to Pro is aimed at builders who've very little .NET or ADO.NET adventure, in addition to programmers who're no longer but pleased with database programming. Best-selling writer Peter Wright painlessly strikes readers from basic database entry to the delicate manipulation of XML documents.
The booklet starts via exhibiting you the fundamental structure of ADO.NET, after which will give you the instruments you will need to paintings with info services and the relationship, Command, and DataSet gadgets. Wright then drills down into the themes which are crucial for you as a certified developer to appreciate, together with transactions, concurrency, typed DataSets, and using XML with ADO.NET.
Through quite a few hands-on examples and dealing code that's adaptable to person initiatives, you will easy methods to create quick and strong ADO.NET firm functions. by way of the tip of this publication, you possibly can paintings at a certified 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
A table- valued function, on the other hand, returns a table variable, a table that you effectively define within the function, specifying the column names and data types as part of the function. A scalar function just returns a scalar value, such as an integer, a string, or another "simple" data type. The hypothetical DateOfFirstOrderO function shown previously would be a scalar function. 25 Chapter 1 Once again, there's far more to this than I could possibly cover here. Take a look at the online help for more information on functions and how to write them.
Although a Connection object is required in order to navigate through the rows in a DataReader, the DataReader itself is not aware of that connection. Instead, the DataReader is linked to a SQLCommand, and the SQLCommand is linked to a connection (see Figure 2-2). ExecuteReader() to get the 5qlDataReader t End )) Figure 2-2. The sequence of events to go through to get hold of a DataReader 39 Chapter 2 This is all best illustrated through code, so go ahead and start up a new project and call it DataReaders.
The Designer is there, though. I OatllbaseOiagraml ... Northwlnd)* ~REATE r......... I . . . sd)· I. StoredProcedure l /* ~ ~ ( @parameterl data type = default value, @parameter2 data type OUTPUT ) */ AS /* SET NOCOUNT ON */ RETURN Figure 1-12. The SQL Editor appears by default when you choose to add a new stored procedure to your database. Despite the rather bland appearance of the SQL Editor, it wraps up a considerable amount of functionality and power. If you intend to do a lot of work with either SQL Server or the MSDE, then you're soon going to think of Visual Studio's SQL Designer as your new best friend.