<script runat="server">
    protected void RadGrid1_NeedDataSource(object sender, GridNeedDataSourceEventArgs e)
    {
        RadGrid1.DataSource = new string[] { "Item1"};
    }
</script>

<telerik:RadAjaxPanel ID="RadAjaxPanel1" runat="server" Height="200px" Width="300px">
    <telerik:RadGrid ID="RadGrid1" runat="server" Width="300px" AutoGenerateEditColumn="true" OnNeedDataSource="RadGrid1_NeedDataSource">
        <ClientSettings EnablePostBackOnRowClick="true">
        </ClientSettings>
    </telerik:RadGrid>
</telerik:RadAjaxPanel>

function fixClickEvent() {
    // Attach the click event to the Action buttons in RadGrid
    $('.RadGrid .rgActionButton').on('click', function (e) {
        // Stop event propagation
        e.stopPropagation();
    })
    // Ensure to remove the method from the event listener
    Sys.Application.remove_load(fixClickEvent);  
}
// on page load, run the script
Sys.Application.add_load(fixClickEvent);