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These article is based on Include File In ASP. The include option is
the heart of making efficient ASP files and re-usable portion. You can
place all of your commonly used code in one simple file and include it in
any number of other ASP files you want. So when you need to update one piece
of code that is used throughout your application you can simply update it
in one file ie the include file and every other page that uses the include
file will automatically be updated. The include file can come in handy for
such things as functions, headers and footers and the connection string.
Believe me it can save a lot of maintenance and updating time.The #include
directive is used to create functions, headers, footers, or elements that
will be reused on multiple pages. Note :- Included files are
processed and inserted before the scripts are executed.
The below are the Syntax for Including Files :-
<!--#include virtual="somefilename"-->
or
<!--#include file ="somefilename"--> |
There are Two way of using an include file :-
- Virtual, using the 'virtual' keyword
- Relative, using the 'file' keyword
- Virtual, using the 'virtual' keyword :- Use the virtual keyword
to indicate a path beginning with a virtual directory. If a file named
"header.inc" resides in a virtual directory named /html, the
following line would insert the contents of "header.inc":
Example#1 :-
Using the code below assumes that the file 'myfile.asp' is located
in the root directory.
| <!--#include virtual="/myfile.asp"
--> |
Example#2 :-
When building my sites I sometimes put all my include files in an include
folder called 'includes'. If I wanted to call a file called 'myfile.asp'
in the includes folder with the virtual keyword then it would look as
stated below :-
| <!--#include virtual="/includes/myfile.asp"
--> |
- Relative, using the 'file' keyword :-Use the file keyword
to indicate a relative path. A relative path begins with the directory
that contains the including file. If you have a file in the html directory,
and the file "header.inc" resides in html\headers.
Example#1 :-
The file keyword indicates a relative path so if the include file was
in the folder 'test' then the relative path from the current folder
might be :-
| <!--#include file="../test/yourfilename.asp"
--> |
Example#2 :-
If the file was in the same folder then it would simply be as stated
below :-
| <!--#include file="yourfilename.asp"
--> |
Note :- You can also use the file keyword with the syntax (..\)
to include a file from a higher-level directory.
Let's take a look at Dynamic Include File :-I think that at one time
or another all of us have attempted to create dynamic include files in our
ASP applications only to find out that it would not work. The usual approach
was to use a variable to hold the name of the file that you wanted to include
and then pass the name of that variable to the include directive. Let us
be clear: The following code will not work :-
<%
'A variable is declared to hold a file name
Dim MyFile
'The desired file name is passed to the variable.
MyFile = Request("SomeFileName")
'Then the variable holding the file name is passed'to the include
directive.
%>
<!--#include file=<%=MyFile%>--> |
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