By William R. Vaughn
Written particularly for COM-based ADO builders retooling for ADO.NET utilizing the C# language, this ebook brings clean insights and tips about the ADO.NET expertise. Veteran authors William Vaughn and Peter Blackburn have packed this formative advisor with useful suggestion on the best way to write code that's either swifter operating and more uncomplicated to appreciate.
The onset of the recent .NET expertise is forcing builders to fully reconsider their information entry thoughts. This booklet lets you do that via operating examples and diverse discussions of what works and what doesnt. Derived from years of expertise operating with facts entry builders, ADO.NET Examples and most sensible Practices for C# Programmers includes a suite of innovations confirmed to tremendously lessen overhead, difficulties, and confusionfor the devleoper, the procedure, and the whole group. whereas a few are very simple to enforce, others require massive forethought to allow. it is a builders bookfull of tricks, assistance and notes handed on from these whove spent major time within the .NET and C# trenches.
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Extra resources for ADO.NET Examples and Best Practices for C# Programmers
NET Data Provider (usually automatically) reconnects when it's told (or needs) to get fresh data or to post updates. NET won't do it for you-at least not in a reasonable length of time. The OleDb documentation says that the OleDb provider does not even attempt to close an OleDbConnection object that falls out of scope. I expect this is universally true with all providers. This is very different from the behavior you've encountered when working with COM -based components and ADOc. NET Update Strategies") I describe how the DataAdapter Fill and the SqlCommand Execute methods include an optional CommandBehavior argument that tells ADO.
Next, your code can define the primary key/foreign key (PK/FK) relationships and any constraints you want ADO,NET to manage for you. All work on the data takes place in client memory (which could be in a middle-tier component, ASp, or distributed client's workstation) . When working with related (hierarchical) data, you can write a SE LECT query to extract all or a subset of the customer's table rows into a DataTable object. You can also create queries and code to construct additional DataTable objects that contain rows in the related Orders and Items database tables.
NET Framework All COM object, property, method, and event references pass through the COM interop layer. Figure 1-1. NET via the COM interop layer. 19 Chapter 1 I suspect we'll see a few side effects caused by this additional translation layer that can't help but hurt performance. COM interop is something like ordering a hamburger from a Spanish-speaking clerk at your local burger palace through a speakerphone. If you don't speak Spanish, the result might have un poco mas cebolla 14 than you planned on-but for me, that's okay!
ADO.NET Examples and Best Practices for C# Programmers by William R. Vaughn