MVC3开箱即用JsonValueProviderFactory(),它非常方便将传入的
JSON绑定到模型.不幸的是,我无法弄清楚如何设置名称与传入JSON不同的模型合同.例如：
[DataContract(Name = "session")]
public class FacebookSession
{
[DataMember(Name = "access_token")]
public string AccessToken { get; set; }
[DataMember(Name = "expires")]
public int? Expires { get; set; }
[DataMember(Name = "secret")]
public string Secret { get; set; }
[DataMember(Name = "session_key")]
public string Sessionkey { get; set; }
[DataMember(Name = "sig")]
public string Signature { get; set; }
[DataMember(Name = "uid")]
public string UserId { get; set; }
}
传入表示facebook会话的json对象时,属性secret和expires正确绑定,但其余部分没有,因为属性名称与json键名称不同.我希望datacontract序列化程序可以尝试绑定到属性中提供的名称,但似乎并非如此.有没有人有任何解决方法的建议？
编辑
我将如何使用此模型的示例：
public ActionResult Log(int? custId,FacebookSession response)
{
ViewBag.Id = response.UserId;
return View();
}
解决方法
我最终使用gt124的链接
model binder example和
a better model binder来编写我自己的模型绑定逻辑.结果看起来像这样：
public interface IFilteredModelBinder : IModelBinder
{
bool IsMatch(Type modelType);
}
public class SmartModelBinder : DefaultModelBinder
{
private readonly IFilteredModelBinder[] _filteredModelBinders;
public SmartModelBinder(IFilteredModelBinder[] filteredModelBinders)
{
_filteredModelBinders = filteredModelBinders;
}
public override object BindModel(ControllerContext controllerContext,ModelBindingContext bindingContext)
{
foreach (var filteredModelBinder in _filteredModelBinders)
{
if (filteredModelBinder.IsMatch(bindingContext.ModelType))
{
return filteredModelBinder.BindModel(controllerContext,bindingContext);
}
}
return base.BindModel(controllerContext,bindingContext);
}
}
public class NewtonsoftJsonModelBinder : IFilteredModelBinder
{
public object BindModel(ControllerContext controllerContext,ModelBindingContext bindingContext)
{
if (!controllerContext.HttpContext.Request.ContentType.StartsWith("application/json",StringComparison.OrdinalIgnoreCase))
{
// not JSON request
return null;
}
var request = controllerContext.HttpContext.Request;
request.InputStream.Position = 0;
var incomingData = new StreamReader(request.InputStream).ReadToEnd();
if (String.IsNullOrEmpty(incomingData))
{
// no JSON data
return null;
}
object ret = JsonConvert.DeserializeObject(incomingData,bindingContext.ModelType);
return ret;
}
public bool IsMatch(Type modelType)
{
var ret = (typeof(JsonModel).IsAssignableFrom(modelType));
return ret;
}
}
然后,我使用JSON.net属性映射到模型上的不同对象属性(而不是DataContracts).这些模型都继承自空基类JsonModel.
