What are the advantages and dis advantage of the asp.net code-behind feature?

Hi Dina Sorry for late reply I was busy with projects

Code behind Advantages:

• Compile time warnings
• Type safety
• Better debugging support
• Separate file\\layer for markups ".aspx" and separate file\\layer for code file ".cs"
• You can reuse code in multiple forms\\pages

Code behind dis advantages:

• Performance are enhanced by putting that code inline. Code behind is  file based architecture it makes your application little heavy because The code for the page is compiled into a separate class from which the .aspx file derives.
• Hard to maintain files on other side in "inline code" you just need to rename one file no dependencies there in inline.

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I prefer code behind approach because you can implement OOP in perfect way.

best regards,

Hamid Anjum

Take a look at the discussion here

http://p2p.wrox.com/asp-net-1-x-2-0-application-design/3170-discussion-code-behind-vs-inline-asp-net.html