>Hi Tim,
>
>The biggest one has about 5k records. Some of them may be processed, depends on which control causes the postback. Most of them are binding to a table, and I found that the slow is caused by the rendering of the control.
>
>I'm thinking to create a custom popup to replace all the dropdownlist with binding to data, is that a better approach?

Just wanted to say since I was late getting back to you that others answered as I would have. Hope you find a suitable solution.
Tim