My code is:
<body>
<script type="text/javascript">
function change() {
alert("Hello");
}
</script>
<form id="form1" runat="server">
<div>
<asp:Button ID="Button1" runat="server" Text="Button" OnClick="change"/>
</div>
</form>
</body>
The error I get is: CS1061: 'ASP.webform1_aspx' does not contain a definition for 'change' and no extension method 'change' accepting a first argument of type 'ASP.webform1_aspx' could be found.
What is the problem?
It should be OnClientClick:-
<asp:Button ID="Button1" runat="server" Text="Button" OnClientClick="change"/>
OnClick event is used to bind server side method on button click.
It should be OnClientClick:-
<asp:Button ID="Button1" runat="server" Text="Button" OnClientClick="return change();"/>
OnClick event is used to bind server side method on button click.
<script type="text/javascript">
function change() {
alert("Hello");
return false;
}
</script>
Not that the return false will stop the postback cause by the button.
And for this you should also mention return before your function call on button like OnClientClick="return change();"
OnClick="change" it means that you should Create Method name as change on server Side
Some thing like this
protected void change(object sender,EventArgs e)
{
}
On Server Side
if(!Page.IsPostBack)
{
Button1.Attributes.Add("onclick","change();")
}
on .aspx
<asp:Button ID="Button1" runat="server" Text="Button" />
