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Editorial Team
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Asked: 2026-05-23T10:22:20+00:00

I want to call jQuery function from server. The server side button that calls

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I want to call jQuery function from server.
The server side button that calls function is inside an UpdatePanel.
this is server side function :

//Button Click handler (It is inside Updatepanel)
string ScriptName = null;
ScriptName = "function pageLoad(sender, args) { if (args.get_isPartialLoad()) {DisplayMessage(); }}";
ScriptManager.RegisterStartupScript(this, GetType(), "DisplayMessage", ScriptName, true);

and this is client side function : 

 <script type="text/javascript">
        function DisplayMessage() {
            //Alert("Called");

        }
</script>

It doesn’t work.

What’s wrong ? (Is my question and problem clear?)

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1 Answer

  1. Editorial Team

    That’s weird, as the following works perfectly fine for me:

    <%@ Page Language="C#" %>
<script type="text/c#" runat="server">
    protected void BtnTrigger_Click(object sender, EventArgs e)
    {
        string script = "function pageLoad(sender, args) { if (args.get_isPartialLoad()) {DisplayMessage(); }}";
        ScriptManager.RegisterStartupScript(
            this, 
            GetType(), 
            "DisplayMEssage", 
            script, 
            true
        );
    }
</script>

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <title></title>
    <script type="text/javascript">
        function DisplayMessage() {
            alert('called');
        }
    </script>
</head>
<body>
    <form id="Form1" runat="server">
        <asp:ScriptManager ID="scm" runat="server" />

        <asp:LinkButton 
            ID="BtnTrigger" 
            runat="server" 
            Text="Trigger" 
            OnClick="BtnTrigger_Click" 
        />

        <asp:UpdatePanel ID="up" runat="server">
            <Triggers>
                <asp:AsyncPostBackTrigger 
                    ControlID="BtnTrigger" 
                    EventName="Click" 
                />
            </Triggers>
        </asp:UpdatePanel>
    </form>
</body>
</html>

    Also do you really need all the complex script, why not simply use string script = "DisplayMessage();";?

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