C#.Net is a
programming language which is extension of C language concepts.So it
contains class programming obviously.Now,what is the class in C#.Net and
how to use it ?
First of
all Class is a group of variables and functions as we know,but in web
technology we can not elaborate class as like this,we have to explain
actual usage of particular class.
So,basically class includes following features.
1) Structured programming
2) Security
3) Re-usability of code
In C#.Net i
have created three classes as per figure and give it to name
Property,Business and Data respectively.You can give any name to the
class as per your convenience.
However,Property
class contains only member definitions which are to be used in website
coding.Variables defined in this class we can use directly within the
complete programming of website.We don't need to declare again.For
example,
Class Property
{
Public int product_id;
}
The second
part is Business class which is to be considered as intermediate class
between Property and Data classes.It passes data of Asp.Net page to the
data class via function and parameters.For example,
Class Business
{
Public void Intersave(Property p1)
{
Data d1=new Data //creating object of data class to pass values.
d1.Insertdata(p1); //using object of Property class to pass the actual value of variable.
}
}
It also
consists business logic as well as restrictions in business
logic.Whatever information we need to pass to the user we can pass
through this class and remaining information we can restrict.
The third
and last class is Data class which contains actual coding which means
queries and coding to perform operations with database.For example,
Class Data
{
Public void Insertdata(Property p1)
{
Sqlconnection conn=new Sqlconnection("Connection String");
.............
.............
}
}
All
classes are included in App_Code folder in Visual
Studio environment.Finally,all classes are converted into .dll file
which is completely secure and very difficult to access.We can easily
reuse same functions in different web pages,we don't need to write same
code again which gives us speed execution and less memory requirement.
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