注意事项：
1.
pageload()方法中
AjaxPro.Utility.RegisterTypeForAjax(typeof(WebApplication2.AjaxMethod));
2.
AjaxMethod类中
[AjaxPro.AjaxMethod(AjaxPro.HttpSessionStateRequirement.ReadWrite)]
3.
web.config中
<httpHandlers>
<add verb="POST,GET" path="ajaxpro/*.ashx" type="AjaxPro.AjaxHandlerFactory, AjaxPro"/>
</httpHandlers>
4.global.asax的Application_Start方法中
AjaxPro.Utility.HandlerPath = "ajaxpro";