The current technology of .Net has gone through significant
phases of development.
·
OLE technology
·
COM technology
·
.NET technology.
OLE technology.
OLE(Object Linking and Embedding) technology was developed
by Microsoft in the early 1990s to enable easy interprocess communication. OLE
provide support to following.
- · To embed documents from one application to another application.
- · To enable one application top manipulate objects located in another application.
This enabled users to develop applications which required
inter-operability between various productsa such as MS-Word and MS Excel.
COM Technology.
Microsoft introduced the component based approach ,a program
is broken into a number of independent compoents where each one offers a
particular service.Each component can be developed and tested indepentently and
then integrated in to the main system(Example spell checker component in MS
Word).This technology is known as Compoent object model and the software built
ising COM is refered as componentware.
Benefits of COM technology.
- · Reduces overall complexity of software.
- · Enables distributed development across multiple organizations or departments and enhances software Maintability.
.NET technology
.NET technology is third generation component model.This
provides a new level of interoperability compared to COM technology. COM provides
a standard binary mechanism for inter module communication.This mechanism is
replaced by intermediate language called
Microsoft Internediate language(MSIL) or simply IL in .NET technology.various .NET –language compilers
enforce interoperability by compiling code into IL, which is automatically
Compatible with other IL modules. An inherent characteristic of IL code is metadata ..Metadata is data about
data and describes its charateristics including datatypes and locations.IL
allows for true cross language integration..In addition to IL ,.NET includes a
host of other technologies and tools that will enable us develop and implement
Web-based applications easily.
------------ Muthu karthikeyan,Madurai
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