问题
I've the following problem: asp.net TextBox server side control, fire onTextChanged only when it loose focus. I would like to fire my server side event each time user press a key. How can i do ? Thanks
回答1:
<asp:TextBox runat="server" onkeyPress="MyKeyPressEvent;" ID="txtUserName" />
Just add the onkeyPress client event to your textbox.
Then in your JavaScript function "MyKeyPressEvent", call a PageMethod that fires your event method.
Pagemethods are good with onkeyPress, since they have very small Request sizes.
回答2:
Going to have to use ajax since the keypress is a client side event.
回答3:
you can use javascript and pagemethods to make it as efficient as possible
use the onkeyup to call a function where you call your pagemethod
http://www.dotnetfunda.com/articles/article454-using-pagemethods-and-json-in-aspnet-ajax.aspx - pagemethods
来源：https://stackoverflow.com/questions/2885423/asp-net-textbox-ontextchanged-event-not-fire