ASP.net Ajax 调用Web Service

HTML:

代码 <asp:ScriptManagerrunat="server"ID="sm">

<Services>

<asp:ServiceReferencePath="~/validateUserName.asmx"/>

</Services>

</asp:ScriptManager>

<div>

<inputtype="text"id="userName"onchange="test();"/>

&nbsp;<spanid="msg"></span>

</div>

JS:

代码 <scripttype="text/javascript">

functiontest(){

requestService=JQueryProj.validateUserName.GetUser(document.getElementById("userName").value,validate);

}

functionvalidate(result){

if(result=="false"){

msg.innerHTML="用户名已存在!";

}

else{

msg.innerHTML="用户名可用!";

}

}

</script>

Web Service

代码 usingSystem;

usingSystem.Collections.Generic;

usingSystem.Linq;

usingSystem.Web;

usingSystem.Web.Services;

usingSystem.Web.Script.Services;

namespaceJQueryProj

{

///<summary>

///validateUserName的摘要说明

///</summary>

[WebService(Namespace="/")]

[WebServiceBinding(ConformsTo=WsiProfiles.BasicProfile1_1)]

[ponentModel.ToolboxItem(false)]

//若要允许使用AJAX从脚本中调用此Web服务，请取消对下行的注释。

[ScriptService]

publicclassvalidateUserName:System.Web.Services.WebService

{

[WebMethod]

publicstringGetUser(stringuserName)

{

if(userName=="admin")

{

returnfalse.ToString().ToLower();

}

else

{

returntrue.ToString().ToLower();

}

}

}

}