How to call the clientside script and server-side script at same time. I cannot able to use both at same time.

<asp:DropDownList ID="ddlModule" runat="server" Width="200px" AutoPostBack="True"
                            OnSelectedIndexChanged="ddlModule_SelectedIndexChanged" />

In Page_Load

ddlModule.Attributes.Add("onchange", "javascript:return validateDropDown('" + ddlModule.ClientID + "');");

if client script execute then server side not working.

Please Help..

Thanks,

How to call the clientside script and server-side script at same time. I cannot able to use both at same time.

<asp:DropDownList ID="ddlModule" runat="server" Width="200px" AutoPostBack="True"
                            OnSelectedIndexChanged="ddlModule_SelectedIndexChanged" />

In Page_Load

ddlModule.Attributes.Add("onchange", "javascript:return validateDropDown('" + ddlModule.ClientID + "');");

if client script execute then server side not working.

Please Help..

Thanks,

• javascript
• asp
• drop-down-menu

• Adding an 'onchange' attribute to a dropdownlist doesn't seem to fire anything in the client side. Did I miss something? – Gezim Commented Jun 5, 2014 at 17:26

1 Answer 1

One solution: in your validateDropDown JavaScript function you can postback the page

<script language='Javascript'>
__doPostBack('__Page', 'MyCustomArgument');
</script>

Here is a reference link How to call Postback from Javascript