ASP.Net | Call Web Service Method

<asp:ScriptManager ID=”_scriptManager” runat=”server”>

<Services>  

<asp:ServiceReference Path=”~/Web_Service/SearchService.asmx” />  

</Services> 

</asp:ScriptManager>

<input id=”butnRead” type=”button” onclick=”SearchService.HelloWorld(AjaxSucceeded);” value=”Read” /><span id=”ResultId”></span>