我的 wcf 客户端出现以下错误。
NetDispatcherFaultException 未处理。
格式化程序在尝试反序列化消息时引发异常：尝试反序列化参数时出错http://tempuri.org/:GetVehicleResult。 InnerException 消息是“第 1 行位置 266 处出现错误。元素”http://tempuri.org/:GetVehicleResult'包含来自映射到名称的类型的数据'http://schemas.datacontract.org/2004/07/WCFServer:汽车'。解串器不知道映射到该名称的任何类型。考虑使用 DataContractResolver 或将与“Car”对应的类型添加到已知类型列表中 - 例如，通过使用 KnownTypeAttribute 属性或将其添加到传递给 DataContractSerializer 的已知类型列表中。请参阅 InnerException 了解更多详细信息。
谁能帮我看看哪里出了问题。
WCF服务器
IVehicle
--------
[ServiceContract]
public interface IVehicleService
{
[OperationContract]
Vehicle GetVehicle(int type);
[OperationContract]
int GetNumberOfWheels(Vehicle vehicle);
}
车辆服务
[ServiceBehavior(AddressFilterMode = AddressFilterMode.Any)]
public class VehicleService : IVehicleService
{
public Vehicle GetVehicle(int type)
{
switch (type)
{
case 0:
return new Car()
{
ID = 10,
Brand = "Volvo",
SteeringWheelPosition = "left"
};
case 1:
return new bike()
{
ID = 11,
Brand = "Scott",
HasFrontWheelBreak = true
};
case 2:
return new Kidsbike()
{
ID = 12,
Brand = "Kid Scott",
HasFrontWheelBreak = false,
HasSupportingWheels = true
};
default:
return null;
}
}
public int GetNumberOfWheels(Vehicle vehicle)
{
return vehicle.NoOfWheels;
}
}
抽象类
[KnownType(typeof(Car))]
[KnownType(typeof(bike))]
[DataContract]
public abstract class Vehicle
{
[DataMember]
public int ID { get; set; }
abstract public int NoOfWheels { get; }
[DataMember]
public string Brand { get; set; }
}
具体类
[DataContract]
public class Car : Vehicle
{
override public int NoOfWheels { get { return 4; } }
[DataMember]
public string SteeringWheelPosition { get; set; }
}
[KnownType(typeof(Kidsbike))]
[DataContract]
public class bike : Vehicle
{
override public int NoOfWheels { get { return 2; } }
[DataMember]
public bool HasFrontWheelBreak { get; set; }
}
[DataContract]
public class Kidsbike : bike
{
[DataMember]
public bool HasSupportingWheels { get; set; }
}
WCF客户端
namespace WCFClient
{
[ServiceContract]
public interface IVehicleService
{
[OperationContract]
Vehicle GetVehicle(int type);
[OperationContract]
int GetNumberOfWheels(Vehicle vehicle);
}
}
namespace WCFClient
{
[KnownType(typeof(Car))]
[KnownType(typeof(bike))]
[DataContract]
public abstract class Vehicle
{
[DataMember]
public int ID { get; set; }
abstract public int NoOfWheels { get; }
[DataMember]
public string Brand { get; set; }
}
[DataContract]
public class Car : Vehicle
{
override public int NoOfWheels { get { return 0; } }
[DataMember]
public string SteeringWheelPosition { get; set; }
}
[KnownType(typeof(Kidsbike))]
[DataContract]
public class bike : Vehicle
{
override public int NoOfWheels { get { return 0; } }
[DataMember]
public bool HasFrontWheelBreak { get; set; }
}
[DataContract]
public class Kidsbike : bike
{
[DataMember]
public bool HasSupportingWheels { get; set; }
}
}
private void btnGetVehicle_Click(object sender, EventArgs e)
{
Car carObj = (Car)fclient.GetVehicle(0);
}
只是在客户端创建代理。我可以成功调用该服务，但响应时出现问题。我尝试使用 Knowntype 属性。这有什么问题吗。
