使用Android上的JQuery在Web上托管的WCF

Question

我已在我的托管帐户@ DiscountASP.net上成功托管了WCF .svc服务及其.NET应用程序。

该服务现在已托管，我可以从同一环境中托管在同一托管服务器上的另一个aspx访问它。在那个aspx中，我使用Javascript代码来访问它并且工作正常。

现在，我想在这里实现的是，从网络上的其他地方访问相同的服务，通过.Ajax函数访问我的Android应用程序html页面。

我相信这是可能的，但我无法完成代码。

以下是我的CostService.svc代码

    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Runtime.Serialization;
    using System.ServiceModel;
    using System.ServiceModel.Activation;
    using System.ServiceModel.Web;
    using System.Text;
namespace SandwichServices
{
[ServiceContract(Namespace = "SandwichServices")]
[AspNetCompatibilityRequirements(RequirementsMode     =AspNetCompatibilityRequirementsMode.Allowed)]
public class CostService
{   
    [OperationContract]
    public double CostOfSandwiches(int quantity)
    {
        return 1.25 * quantity;
    }

    // Add more operations here and mark them with [OperationContract]
}
}

以下是从javascript调用它的代码

                        var Type;
                        var Url;
                        var Data;
                        var ContentType;
                        var DataType;
                        var ProcessData;
                        function WCFJSON() {
                        var qq = "3";
                        Type = "POST";
                        Url = "rent-o-buy.com/costservice.svc";
                        Data = '{"quantity": "' + qq + '"}';
                        ContentType = "application/json; charset=utf-8";
                        DataType = "json";
                        ProcessData = true;
                        CallService();
                        }
                        // Function to call WCF  Service       
                        function CallService() {
                        //alert('before ajax call');
                        $.ajax({
                            type: Type, //GET or POST or PUT or DELETE verb
                            url: Url, // Location of the service
                            data: Data, //Data sent to server
                            contentType: ContentType, // content type sent to server
                            dataType: DataType, //Expected data format from server
                            processdata: ProcessData, //True or False
                            success: function (msg) {//On Successfull service call
                                ServiceSucceeded(msg);
                            },
                            error: ServiceFailed// When Service call fails
                        });
                        //alert('after ajax call');
                        }


                         function ServiceFailed(result) {
                        alert('failed: ' + result.status + '' + result.statusText);
                        Type = null;
                        varUrl = null;
                        Data = null;
                        ContentType = null;
                        DataType = null;
                        ProcessData = null;
                    }
                    function ServiceSucceeded(result) {
                        alert('ServiceSucceeded');
                        if (DataType == "json") {
                            resultObject = result.GetUserResult;
                            alert('resultObject.length=' + resultObject.length);
                            for (i = 0; i < resultObject.length; i++) {                    
                                alert(resultObject[i]);
                            }
                        }
                    }
                    function ServiceFailed(xhr) {
                        alert(xhr.responseText);

                        if (xhr.responseText) {
                            var err = xhr.responseText;
                            if (err)
                                error(err);
                            else
                                error({ Message: "Unknown server error." })
                        }
                        return;
                    }
    </script>

我需要JavaScript的帮助，因为它似乎没有与服务进行通信。 谢谢