请查看下面的代码并帮助我找出我在 Web 服务代码中做错了什么。我想设置一个可以使用 JSONP 使用的 asp.net Web 服务。我在客户端使用 Jquery 来访问该站点。即使设置了正确的属性,我的 Web 服务仍然会发出 xml,因此 aynch 调用失败。
网络服务
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[System.Web.Script.Services.ScriptService]
public class WebService : System.Web.Services.WebService {
public WebService () {
//Uncomment the following line if using designed components
//InitializeComponent();
}
[WebMethod]
[ScriptMethod(ResponseFormat= ResponseFormat.Json, XmlSerializeString=false, UseHttpGet=true)]
public string HelloWorld(int id, string __callback) {
return __callback + "({message: 'Hello World'})";
}
}
网络服务响应:
<?xml version="1.0" encoding="utf-8"?>
<string xmlns="http://tempuri.org/">test({message: 'Hello World'})</string>
网络配置:
<webServices>
<protocols>
<add name="HttpGet"/>
<add name="HttpPost"/>
</protocols>
</webServices>
<httpHandlers>
<remove verb="*" path="*.asmx"/>
<add verb="*" path="*.asmx" validate="false"
type="System.Web.Script.Services.ScriptHandlerFactory,
System.Web.Extensions, Version=3.5.0.0,
Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
<add verb="*" path="*_AppService.axd" validate="false"
type="System.Web.Script.Services.ScriptHandlerFactory,
System.Web.Extensions, Version=3.5.0.0,
Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
<add verb="GET,HEAD" path="ScriptResource.axd"
type="System.Web.Handlers.ScriptResourceHandler,
System.Web.Extensions, Version=3.5.0.0,
Culture=neutral, PublicKeyToken=31BF3856AD364E35"
validate="false"/>
</httpHandlers>
<httpModules>
<add name="ScriptModule"
type="System.Web.Handlers.ScriptModule, System.Web.Extensions,
Version=3.5.0.0, Culture=neutral,
PublicKeyToken=31BF3856AD364E35"/>
</httpModules>
Javascript
$.ajax({
type: "GET",
contentType: "application/json; charset=utf-8",
url: "http://localhost:54404/jsonp/webservice.asmx/HelloWorld?id=2&__callback=?", //?jsonp=MatchSvcCallback
dataType: "jsonp",
data: {},
//jsonp : "MatchSvcCallback",
success: function(msg) {
alert("Inside success callback function"); // not being called
},
error: function(xhr, msg){
var response = JSON.parse(xhr.responseText);
}
});
js 代码与处理程序一起使用,但由于 xml 响应而导致 web 服务失败。