[最佳答案] Use it on a textbox then! Surely the person looking in the dropdown list knows the name of the client. There is little difference, in my opinion, in this scenario. I have been using a jQuery tag suggest add in on my MVC app which works very well. http://remysharp.com/2007/12/28/jquery-tag-suggestion/ If you are interested just comment and i will give you the code i am using. If you really want to use a dropdown list you could have a textbox and dropdown list in an update panel. When the users e