Access Cookbook, 2nd Edition [Electronic resources] نسخه متنی

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Access Cookbook, 2nd Edition [Electronic resources] - نسخه متنی

Ken Getz; Paul Litwin; Andy Baron

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Chapter 17. .NET


In the beginning of 2002, Microsoft introduced a new initiative
called .NET
that radically changed the Microsoft programming world. Microsoft
.NET programs run on top of a runtime environment called the
Common Language Runtime. Microsoft .NET
provides a consistent programming model across desktop and web
applications and across development languages. In this new
development world, many of the old ways of programming have been
thrown out the window. Microsoft .NET minimizes "DLL
hell" and no longer uses the registry to install
programs. All languages that run under .NET share common systems for
data types, accessing data, security, garbage collection, and
exception handling.

Access 2003 and earlier versions of Access, however, do not live in
the world of .NET. Instead, they live in the world of the Component
Object Model, or COM. By default, a COM-based program does not know
how to talk to a .NET-based program. Fortunately, Microsoft created a
mechanism for .NET to interoperate with the older COM-based world.

In this chapter you will find various examples that demonstrate how
.NET and Access can coexist. You'll learn how to
call a .NET component from Access, even when there are potentially
incompatible features present in the component.
You'll explore how to connect to an Access database
to retrieve and update data. You'll see how to call
.NET web services from Access. You'll learn how to
call .NET web services that return both simple data types and complex
data types. Finally, you'll learn how to automate
Access from a .NET application in order to print an Access report.


The topics in this chapter all require the presence of the
.NET
Framework 1.1 and Visual Studio .NET 2003. If you do not have
Visual Studio .NET 2003 (or a later version
of Visual Studio .NET) installed on your system you will be unable to
work through the topics in this chapter. See the Preface for advice
on where to find free or evaluation editions of both tools.


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