By William R. Vaughn
Written particularly for COM-based ADO builders retooling for ADO.NET utilizing the C# language, this booklet brings clean insights and pointers on the ADO.NET expertise. Veteran authors William Vaughn and Peter Blackburn have packed this formative consultant with useful recommendation on the best way to write code that's either speedier operating and more straightforward to appreciate.
The onset of the hot .NET know-how is forcing builders to fully reconsider their facts entry concepts. This ebook allows you to do that via operating examples and various discussions of what works and what doesnt. Derived from years of expertise operating with info entry builders, ADO.NET Examples and most sensible Practices for C# Programmers includes a suite of suggestions confirmed to enormously lessen overhead, difficulties, and confusionfor the devleoper, the process, and the complete staff. whereas a few are very simple to enforce, others require huge forethought to allow. this can be a builders bookfull of tricks, advice and notes handed on from these whove spent major time within the .NET and C# trenches.
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Additional resources for ADO.NET Examples and Best Practices for C# Programmers
I illustrate how to get the Fill method to manage connections in the next chapter and a simpler, more ADO. NET-centric approach later in this chapter. Notice the use of C#'s try and catch error handler. SqIException object simply as SqlException (remember that you placed the using System. Data. SqlClient; statement in earlier so that you could make these "shorthand" references) . SqlException exposes a Message and Error number (and more) that can be used to figure out what went wrong. The simplest way to provide all of the SqlException object information to a developer during debugging is to cast it to a string with a call to the ToString () method, sending this to the Debug output window via the 22.
Is logically tied to a DataAdapter object used to fetch and perform action queries as needed. 25 Chapter 1 • Contains Constraints and Relations collections to manage inter-DataTable relationships. • Is data-source agnostic, stateless, and can function independently from the data source. All data, schema, constraints, and relationships to other tables in the DataSet are contained therein. • Is transported through XML documents via HTTP. This means a DataSet can be passed through firewalls and used by any application capable of dealing with XML.
NET executables is to encapsulate your ADOc (or other COM object reference) code in its own wrapper. With this approach, you only access specific methods of the wrapper object, which execute blocks of ADOc code. Few if any properties are exposed. This approach resembles what you do to implement a middle-tier COM component. It also means that you spend far less time in the interop layer-once when you enter the wrapper DLL and once when you return. The problem here is that you often have to reengineer your ADOc code, resulting in some loss of flexibility in coding directly to the ADOc objects.
ADO.NET Examples and Best Practices for C# Programmers by William R. Vaughn