Question

我试图将ASMX Web服务转换为WCF Web服务，但问题在于它一直表示Context在当前上下文中不存在。这是我的代码：

using System;
using System.Collections.Generic;
using System.ServiceModel;
using System.ServiceModel.Activation;
using System.Data;
using System.Data.SqlClient;
using System.Web.Script.Serialization;


[ServiceContract(Namespace = "")]
[AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)]
public class PhBookService
{

    [OperationContract]
    public void GetAllCities()
    {
        List<Cities> listCity = new List<Cities>();

        SqlConnection connection = new SqlConnection("Data Source=BS-HP-PC-11\\SQLEXPRESS;Initial Catalog=PhoneBookData; Integrated Security=true; User ID=phonebook;Password=phone");
        using (connection)
        {
            SqlCommand command = new SqlCommand("select * from d_City", connection);
            connection.Open();
            SqlDataReader reader = command.ExecuteReader();
            while (reader.Read())
            {
                Cities City = new Cities();
                City.CityID = Convert.ToInt32(reader["CityID"]);
                City.CityN = reader["CityN"].ToString();
                listCity.Add(City);
            }
        }
        JavaScriptSerializer javascript = new JavaScriptSerializer();
        Context.Response.Write(javascript.Serialize(listCity)); -- this line here is where I get the error.
    }

}

添加任何类型的使用系统。＆＃34;东西＆＃34;似乎不适合我。我该怎么办？

P.S。这是我的ajax请求。

Answer 1

我不确定您是否包含了所有代码，但WCF服务通常包含一些内容，例如代表合同的界面。在您的情况下，您应该返回一个城市列表。

话虽这么说，我会以不同的方式构建你的代码：

DataContract为您的城市类型
代表您的ServiceContract的接口，包括 OperationContract的

实现ServiceContract（接口）的类

[DataContract]
public class Cities
{   
    [DataMember]
    public string CityN {get;set;}

    [DataMember]
    public int CityID {get;set;}
}

[ServiceContract]
public interface ICities
{
   [OperationContract]
   List<Cities> GetAllCities();
}

public class PhBookService : ICities
{
    public List<Cities> GetAllCities()
    {
        List<Cities> listCity = new List<Cities>();

        SqlConnection connection = new SqlConnection("Data Source=BS-HP-PC-11\\SQLEXPRESS;Initial Catalog=PhoneBookData; Integrated Security=true; User ID=phonebook;Password=phone");
        using (connection)
        {
            SqlCommand command = new SqlCommand("select * from d_City", connection);
            connection.Open();
            SqlDataReader reader = command.ExecuteReader();
            while (reader.Read())
            {
                Cities City = new Cities();
                City.CityID = Convert.ToInt32(reader["CityID"]);
                City.CityN = reader["CityN"].ToString();
                listCity.Add(City);
            }
        }

        return listCity;
    }
}

WCF服务Context.Response

1 个答案: