how to upload images of all types??(.jpg,.gif,.png,bmp etc..)

Please don't post answers to your own question, unless you really have the answer to post. Use the forum below, or edit your post.

The code is very trivial. You say you have code but it only works for jpg. You should post that code ( you should ALWAYS post your code when asking people to help you with it ). The duplicate image thing, you need to clarify if you mean image path ( which is a problem, why can't two people upload two different images both called cat.jpg ), or two identical images, which poses it's own problems. You should read my image processing articles if you want to do that, you'd need to iterate over the whole image and compare it pixel by pixel, or decide on what sample you're willing to accept as proof that they are the same. What if I resize the same image and upload it, will you accept that ? The question needs to be defined before it can be answered.

<asp:Image runat="server" ID="image"/>

and then when your file is uploaded, you save it and set image.ImageUrl to the path you saved it at, that's the grand total of the answer to your last question, as I said, that's so trivial, that I think it's more worthwhile to explore what you have first, then ask where you've learned from, to not be able to work out basics like that using your references and/or google.

thanks for your support..
but i want the proper code to do this..
or i want the link where i can find this...