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how to open a .cs file

Posted on 2004-09-13
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Last Modified: 2010-05-18
How do I open a .cs file?

The code looks like C# asp.net


Thanks.
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Question by:duckers1234567890
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by:jnhorst
ID: 12051852
That's what it likely is.  You can view it using any text editor as it ASCII text.  If you have Visual Studio you can use that too.  Just note that if you change it, the project has to be recompiled for any changes to be applied.  The .cs files are compiled into a dll file usually in a bin folder of an asp.net application.

John
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by:duckers1234567890
ID: 12051863
how do I run it?  In a web browser? or called upon as an include?

Thanks.
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jnhorst earned 55 total points
ID: 12051921
You don't really "run" it.  When you create an aspx page, Visual Studio creates the .cs file as what is called "codebehind".  It is an object-oriented representation of the page.  When you compile the application, the classes defined in the .cs files all get compiled up into what is called a "namespace".  If you look at an aspx page, the very first line (usually) has what is called a Page Directive.  In that element is an attribute like this: Inherits="namespace.pageclass".  SO if I had an application named WebApp1 and a page in this app called start.aspx, this would be Inherits="WebApp1.start".

When a user requests start.aspx, that element tells the asp.net runtime running under IIS to try to instantiate the "start" class in the WebApp1 namespace that is all defined in the dill file for the app, which is created when the app is compiled.  In fact, when a developer creates a site on a development machine, the .cs files should not be copied onto the server, as when the app is actually run, they are not used, not even as includes.

John
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Expert Comment

by:jnhorst
ID: 12051926
Question: are these files like this: "start.aspx.cs" ("start" could be any filename).

John
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