Study of AJAX

Generally, Ajax is HTML、JavaScript™、DHTML and DOM

1, XMLHttpRequest :
As a result of the browser war several years ago, we should create it's instance as follows:

 1            var xmlHttpObject = null;
 2            }

The function it provides:

open()：建立到服务器的新请求。

send()：向服务器发送请求。

abort()：退出当前请求。

readyState：提供当前 HTML 的就绪状态。

responseText：服务器返回的请求响应文本。

 

 1,

PS:

1//queryString(arg) format the args to xxx&xxx&xxx..
2request.send( this.queryString(requestParams) );

Also, we can use ScriptManager & This is more easy, the folowing is a sample use WebService:

 1        <asp:ScriptManager ID="ScriptManager1" runat="server">
 2            <Services>
 3                <asp:ServiceReference Path="EmployeeService.asmx" />
 4            </Services>
 5        </asp:ScriptManager>
 6        
 7>

The Web Service, for example:

 1namespace AspNetAjaxOverview
 2}