Timeout in Dropdown selectindex changed event

I have built one web application and in that i had bound drop down with 10K records and when i will change index then i will get page timeout error!!

can anyone suggest me the ca开发者_如何学编程use of this problem?

even if you would not have the time out issue it would have been impossible for the users select the item they were looking for on a drop down list with 10k records! Perhaps you should use another kind of control to show such a big resulset (Paged repeater/grid view) or anything that can be paged