ADO.NET Examples and Best Practices for C# Programmers by William R. Vaughn PDF


By William R. Vaughn

Written in particular for COM-based ADO builders retooling for ADO.NET utilizing the C# language, this ebook brings clean insights and pointers on the ADO.NET know-how. Veteran authors William Vaughn and Peter Blackburn have packed this formative consultant with sensible recommendation on how you can write code that's either speedier working and more uncomplicated to appreciate.

The onset of the hot .NET know-how is forcing builders to fully reconsider their info entry concepts. This ebook enables you to do that via operating examples and diverse discussions of what works and what doesnt. Derived from years of expertise operating with information entry builders, ADO.NET Examples and top Practices for C# Programmers includes a suite of options confirmed to vastly lessen overhead, difficulties, and confusionfor the devleoper, the approach, and the complete crew. whereas a few are very simple to enforce, others require enormous forethought to permit. this can be a builders bookfull of tricks, guidance and notes handed on from these whove spent major time within the .NET and C# trenches.

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I encourage you to do the same. The crudest, ofcourse, is a simple catch and casting of the exception object to a string that is sent to the debug output window. This can save you an extra ten minutes as you try to figure out what went wrong. NET approach. You should notice that there is no explicit call to open the connection-that is taken care of here silently by the FillO method; I talk more about this later. 35 Chapter 1 Also, I am specifying properties for the class' constructors to use when instantiating.

NET application. While this utility converts the code, it does not convert the architecture or query strategy. NET application. NET executables. DLL) and include "using adodb;" in your solution. In this approach, you access the objects and their properties and methods directly. The problem is that each and every time you reference an ADOc object (or any COM object), property method, or event, the Common Language Runtime (CLR) has to make the reference to and from the COM interop layer. This will slow down the references to some degree and if the interop does not behave, it might impair functionality.

I discuss the construction of these commands in Chapter 3. Coding the DataAdapter I expect you'd like to see some code that demonstrates how all of this is implemented. Because I haven't discussed the Connection object yet, this will be a little tough, but let's assume for a minute that you know how to get connected in ADO. NET. Let me walk you through a small example. ) First, make sure that your application can see the SqlClient namespace. NET Framework, but not part of your application's namespace.

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