How to perform javascript inside C# event
<p>I am inside an event and inside this event I want to have a javascript alert display a message to a user.  But I cannot seem to get this to work.</p>

<pre><code>protected void dgvStaff_Deleting(object sender, Infragistics.Web.UI.GridControls.RowDeletingEventArgs e)
        {
            // Code stub
            object test = e.Row.Items[0].Text;
            //ScriptManager.RegisterStartupScript(this, this.GetType(), "alertbox", "ShowPopup('Select a row to rate');", true);
            ScriptManager.RegisterClientScriptBlock(this, this.GetType(), "alertbox", "ShowPopup('Select a row to rate');", true); 
            if (objGatewayFunctions.CheckStaffAssignment(e.Row.Items[0].Text.ToString(), ConfigurationManager.AppSettings.Get("Connection").ToString()) == true)
            {

            }
        }
</code></pre>

<p>Any idea what I am doing wrong here?</p>
