< httpHandlers >
< add verb ="POST,GET" path ="ajax/*.ashx" type ="Ajax.PageHandlerFactory,Ajax" />
</ httpHandlers >

// [Ajax.AjaxMethod]
[Ajax.AjaxMethod(Ajax.HttpSessionStateRequirement.Read)]
public static string GetNIVNumber( string str)
{
return str;
}

< HTML >
< HEAD >
< title > AjaxForm </ title >
< meta name ="GENERATOR" Content ="MicrosoftVisualStudio.NET7.1" >
< meta name ="CODE_LANGUAGE" Content ="C#" >
< meta name ="vs_defaultClientScript" content ="JavaScript" >
< meta name ="vs_targetSchema" content ="http://schemas.microsoft.com/intellisense/ie5" >
< script language ="javascript" >
function testAjax()
{
var first = document.getElementById( " txtfirst " );
AjaxMethod.GetNIVNumber(first.value,callback_GetNIVNumber);
}
function callback_GetNIVNumber(res)
{
var obj = document.getElementById( " txtsecond " );
obj.value = res.value;
}
</ script >
</ HEAD >
< body MS_POSITIONING ="GridLayout" >
< form id ="Form1" method ="post" runat ="server" >
< INPUT style ="Z-INDEX:101;LEFT:208px;POSITION:absolute;TOP:40px" type ="button" value ="Button"
onclick ="testAjax();" >
< asp:TextBox id ="txtfirst" style ="Z-INDEX:102;LEFT:40px;POSITION:absolute;TOP:40px" runat ="server" ></ asp:TextBox >
< asp:TextBox id ="txtsecond" style ="Z-INDEX:103;LEFT:40px;POSITION:absolute;TOP:72px" runat ="server" ></ asp:TextBox >
</ form >
</ body >
</ HTML >

protected System.Web.UI.WebControls.TextBoxtxtfirst;
protected System.Web.UI.WebControls.TextBoxtxtsecond;
private void Page_Load( object sender,System.EventArgse)
{
// 注冊,其中Document.Pages.AjaxTest.AjaxMethod為AjaxMethod.cs方法所在的命名空間
Ajax.Utility.RegisterTypeForAjax( typeof (Document.Pages.AjaxTest.AjaxMethod));
}