.net 使用实体框架返回数据实现Protobuf net v2
有人能指出我下面的源代码有什么问题吗.net 使用实体框架返回数据实现Protobuf net v2,.net,linq,entity-framework,protocol-buffers,protobuf-net,.net,Linq,Entity Framework,Protocol Buffers,Protobuf Net,有人能指出我下面的源代码有什么问题吗 using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using System.IO; using System.Net; using System.IO.Compression; using System.Web.Services.Protocols; using CCBProdu
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO;
using System.Net;
using System.IO.Compression;
using System.Web.Services.Protocols;
using CCBProductionEntityModel;
using ConsoleDebug.NestleWebReference;
using ProtoBuf;
namespace ConsoleDebug
{
class Program
{
static void Main(string[] args)
{
//This is where I get data from and store into a list
CCBProductionEntities et = new CCBProductionEntities();
List<GetNestleData_Result> results = et.GetNestleData(5).ToList();
List<GetNestleData_Result> responseResults;
using (var stream = new MemoryStream())
{
Serializer.Serialize(stream, results);
using (var responseStream = new MemoryStream())
{
responseResults = Serializer.Deserialize<List<GetNestleData_Result>>(responseStream);
}
}
results = responseResults;
StringBuilder sb = new StringBuilder();
for (int i = 0; i < results.Count(); i++)
{
var result = results.ElementAt(i);
sb.Append(result.AssetId + "\t" + result.DeviceId + "\t" + result.InstanceNumber + "\t" + result.Speed + "\t" + result.Heading + "\t" + result.DriverId + "\t" + result.PositionAge + "\t" + result.VehicleRegistrationNum + "\t" + result.GSMAddress + "\t" + result.Odometer + "\t" + result.Latitude + "\t" + result.Longitude + "\t" + result.Altitude + "\t" + result.IgnitionState);
}
Console.WriteLine(sb.ToString());
Console.ReadLine();
}
}
}
尝试运行时,我收到错误消息:
类型不应为,并且无法推断任何契约:CCBProductionEntityModel.GetNestleData_Result
我尝试到处搜索示例源代码,但很难找到一个好的和干净的源代码,是不是在使用序列化程序之前我必须定义一些东西?怎么做?谢谢 在哪里定义GetNestleData_结果?这是你自己的代码吗?或者这是来自EF代码生成器?还是
基本上,protobuf net希望使用声明数据协定的类型,以便用于序列化。特别是,因为protobuf妻子格式不包括成员名,而只包括字段号,所以它需要一种知道1===Name等的方法。有多种方法可以做到这一点。如果类型是您自己的代码,最简单的方法是添加属性-它将识别一些模式,例如:
[ProtoContract]
public class GetNestleData_Result {
[ProtoMember(1)]
public int SomeValue {get;set;}
[ProtoMember(2)]
public List<Foo> SomeMoreValues {get;set;}
// etc
}
但是,如果类型完全不在您的控制范围内,并且不包含任何可用于确定顺序的属性,则您还可以在代码中配置所有内容:
RuntimeTypeMode.Default.Add(typeof(GetNestleData_Result), false)
.Add("SomeValue", "SomeMoreValues");
这将做同样的事情
一旦序列化程序知道您的类型应该如何配置,它就会工作。谢谢您,Marc,您的响应非常快: 我通过修饰实体框架模型生成的类来实现:
public partial class GetNestleData_Result
{
[ProtoMember(1)]
public Nullable<int> AssetId { get; set; }
[ProtoMember(2)]
public long DeviceId { get; set; }
[ProtoMember(3)]
public Nullable<int> EventTime { get; set; }
[ProtoMember(4)]
public Nullable<short> InstanceNumber { get; set; }
[ProtoMember(5)]
public Nullable<short> Speed { get; set; }
[ProtoMember(6)]
public Nullable<short> Heading { get; set; }
[ProtoMember(7)]
public Nullable<int> DriverId { get; set; }
[ProtoMember(8)]
public Nullable<short> PositionAge { get; set; }
[ProtoMember(9)]
public string VehicleRegistrationNum { get; set; }
[ProtoMember(10)]
public string GSMAddress { get; set; }
[ProtoMember(11)]
public Nullable<int> Odometer { get; set; }
[ProtoMember(12)]
public Nullable<int> Latitude { get; set; }
[ProtoMember(13)]
public Nullable<short> Altitude { get; set; }
[ProtoMember(14)]
public Nullable<int> Longitude { get; set; }
[ProtoMember(15)]
public string IgnitionState { get; set; }
}
不过,我还有3个与protobuf相关的问题:I。在获得对象的流形式之后,如果我想使用Web服务,我如何对其进行编码以使流可以使用?XML编码?二,。我试图再次通过额外的压缩将protobuf格式的数据从控制台发送到Web服务,这是必要的吗?所以我每次都要对类文件做这个修饰,以便protobuf序列化工作?没有快捷方式或更干净的代码方式?omg,反序列化不再工作,我按照相同的步骤返回,返回的特定类型的列表具有正确的长度,但所有的零/空值,有任何可能的原因吗?请帮忙!
RuntimeTypeMode.Default.Add(typeof(GetNestleData_Result), false)
.Add("SomeValue", "SomeMoreValues");
public partial class GetNestleData_Result
{
[ProtoMember(1)]
public Nullable<int> AssetId { get; set; }
[ProtoMember(2)]
public long DeviceId { get; set; }
[ProtoMember(3)]
public Nullable<int> EventTime { get; set; }
[ProtoMember(4)]
public Nullable<short> InstanceNumber { get; set; }
[ProtoMember(5)]
public Nullable<short> Speed { get; set; }
[ProtoMember(6)]
public Nullable<short> Heading { get; set; }
[ProtoMember(7)]
public Nullable<int> DriverId { get; set; }
[ProtoMember(8)]
public Nullable<short> PositionAge { get; set; }
[ProtoMember(9)]
public string VehicleRegistrationNum { get; set; }
[ProtoMember(10)]
public string GSMAddress { get; set; }
[ProtoMember(11)]
public Nullable<int> Odometer { get; set; }
[ProtoMember(12)]
public Nullable<int> Latitude { get; set; }
[ProtoMember(13)]
public Nullable<short> Altitude { get; set; }
[ProtoMember(14)]
public Nullable<int> Longitude { get; set; }
[ProtoMember(15)]
public string IgnitionState { get; set; }
}