问题
How to call javascript function on keyup event for asp.net's TextBox control? I am trying something like this, but it is not working.
<asp:TextBox ID="txt_userid" runat="server" onkeyup="GetRes();"></asp:TextBox>
UPDATE
there is a update alert is working but breakpoints in java function is not working.
回答1:
Test this solution:
Add this code to your page load:
txt_userid.Attributes.Add("onkeyup", "GetRes();");
I don't say this is best way possible, but it works.
UPDATE:
Complete sample:
ASPX:
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:TextBox ID="txt_userid" runat="server"></asp:TextBox>
</div>
</form>
</body>
</html>
Code behind:
protected void Page_Load(object sender, EventArgs e)
{
txt_userid.Attributes.Add("onkeyup", "alert('hi');");
}
Works perfectly. Tested it in IE, Chrome, FireFox.
回答2:
it is very simple:
TextBox1.Attributes.Add("onclick", "hello();");
in asp.cs code file.
then in aspx source file use javascript function:
<script type="text/javascript">
function hello() {
alert("hi")
}
</script>
回答3:
$(document).ready(function () {
$('#<%=TextBox1%>').keyup(function () {
updateDateKey($(this).val());
});
});
来源：https://stackoverflow.com/questions/5607313/how-to-call-javascript-function-on-keyup-event-for-asptextbox