Use ajaxpro.2.dll as an example.

1,ConfigurationWeb. config

<System. Web>

<Httphandlers>
<Add verb = "post, get" Path = "ajaxpro/*. ashx" type = "ajaxpro. ajaxhandlerfactory, ajaxpro.2"/>
</Httphandlers>

</System. Web>

2. Add reference ajaxpro.2.dll

3. BackgroundCodeAs follows:

Using system;
Using system. Collections. Generic;
Using system. LINQ;
Using system. Web;
Using system. Web. UI;
Using system. Web. UI. webcontrols;
Using ajaxpro;

Namespace used_car
{
Public partial classWebform1: System. Web. UI. Page
{
Protected void page_load (Object sender, eventargs E)
{

Ajaxpro. Utility. registertypeforajax (typeof (Webform1), This. Page );

}
[Ajaxpro. ajaxmethod]
Public String getservertime ()
{
Return datetime. Now. tostring ();
}
}
}

4. frontend call

<Script language = "JavaScript" type = "text/JavaScript">

Function testf (){
VaR dt = used_car.webform1.getservertime ().Value;
Alert (DT );
}

</SCRIPT>

<Input id = "comit" type = "button" value = "OK" onclick = "testf ()"/>