i want to know that how can we create A4 size page in asp.net that flow middle of the web page
You can't.
Webpages are created for screens, not printers.
You can used this CSS code (to design the setting of the webpage):
http://css-discuss.incutio.com/wiki/Print_Stylesheets
The link you provided has nothing to do with any code. It's a database structure.
LastMitch
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If you know the width of the target size in pixels, you can just add a div and apply a width property with this value and a margin property such as...
#div1 {width:##px;margin:0 auto;}
JorgeM
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