jQuery AJAX 调用WebService实现代码

用jQuery调用其他项目的WebService
实现登录验证功能
html输入用户名密码：
代码

<table style="width: 400px"> 
<tr> 
<td style="width: 200px" class="left"> 
Login ID: 
</td> 
<td style="width: 200px" class="left"> 
<input id="txtLoginID" type="text" style="width: 190px;" value="" /> 
</td> 
</tr> 
<tr> 
<td style="width: 200px" class="left"> 
Login Password: 
</td> 
<td style="width: 200px" class="left"> 
<input id="txtLoginPW" type="password" style="width: 190px;" value="" /> 
</td> 
</tr> 
<tr> 
<td style="width: 200px" class="center"> 
<input id="btnSignin" value="Sign in" class="button" readonly /> 
</td> 
<td style="width: 200px" class="center"> 
<input id="btnSignup" value="Sign up" class="button" readonly /> 
</td> 
</tr> 
</table>

Jquery引用和登录事件
代码

<script src="js/jquery-1.4.2.min.js" type="text/javascript"></script> 
<script type="text/javascript" language="javascript"> 
$(document).ready(function() 
{ 

$('#btnSignin').click 


(function() 


{ 



$.ajax 



( 



{ 




type: "POST",　 




contentType: "application/json", 




url: serviceURL+"/UserLogin", 




data: "{UserLoginID:'"+$('#txtLoginID').val()+"',UserLoginPW:'"+$('#txtLoginPW').val()+"'}",

 　 




dataType: 'json', 




success: function(result) 




{ 




 var user = eval(result.d); 





location.href = "Welcome.aspx?userID="+user.UserID 



　 }, 



　 error: function(result, status) 



　 { 



　 if(status == 'timeout') 



　 { 



　 alert("The request timed out, please resubmit"); 



　 } 



　 else 



　 { 



　 if(result.responseText !="") 



　 { 



　 eval("exception = "+result.responseText); 






 alert(exception.Message); 






} 





} 




} 



} 



); 


} 


); 
　 }); 
　 
　 $(document).ready(function() 
{ 


$('#btnSignup').click 


(function() 


{ 



location.href = "Signup/Signup.aspx"; 


}) 
 
　 }); 
</script>

serviceURL类似：var serviceURL = "http://localhost:1742/SoldierServices.asmx";
WebService代码：
代码

/// <summary> 
/// Summary description for SoldierServices 
/// </summary> 
[WebService(Namespace = "http://tempuri.org/")] 
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)] 
[ToolboxItem(false)] 
// To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line. 
[System.Web.Script.Services.ScriptService] 
public class SoldierServices : System.Web.Services.WebService 
{ 
[WebMethod] 
public User UserLogin(string UserLoginID, string UserLoginPW) 
{ 
LoginBusiness lb = new LoginBusiness(); 
return lb.UserLogin(UserLoginID, UserLoginPW); 
} 
[WebMethod] 
public User GetUserInfo(string UserID) 
{ 
LoginBusiness lb = new LoginBusiness(); 
return lb.GetUserInfo(UserID); 
} 
}

注意：[System.Web.Script.Services.ScriptService]默认是注释的，要把注释去掉