Hello Nidhi1214,
The following is my testing result.
<form id="form1" runat="server">
<div class="hasJS">
<asp:DropDownList class="custom" ID="myid" runat="server" OnSelectedIndexChanged="myid_SelectedIndexChanged" AutoPostBack="True" onChange="myChange();">
<asp:ListItem>Hello</asp:ListItem>
<asp:ListItem>Hello1</asp:ListItem>
<asp:ListItem>Hello3</asp:ListItem>
</asp:DropDownList>;
</div>
<script type="text/javascript">
function myChange() {
alert("Hai");
}
</script>
It seem that everything works well. when the dropdownlist index has changed , The onchange property will be called first , then the OnSelectedIndexChanged event is triggered. these methods have the order of execution. And If I misunderstand what
you want , you could provide more information about your issues.
I think the follow forum is a better place that you should post.
https://forums.asp.net/
Best regards,
feih_7
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Onchange and SelectedIndexChanged
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