C# ASP.NET MVC操作方法参数中绑定到JSON的DataContract模型
MVC3附带了JsonValueProviderFactory(),这对于将传入的JSON绑定到模型非常方便。不幸的是,我不知道如何使用不同于传入JSON的名称设置模型契约。例如:C# ASP.NET MVC操作方法参数中绑定到JSON的DataContract模型,c#,asp.net-mvc-3,datacontractserializer,modelbinders,model-binding,C#,Asp.net Mvc 3,Datacontractserializer,Modelbinders,Model Binding,MVC3附带了JsonValueProviderFactory(),这对于将传入的JSON绑定到模型非常方便。不幸的是,我不知道如何使用不同于传入JSON的名称设置模型契约。例如: [DataContract(Name = "session")] public class FacebookSession { [DataMember(Name = "access_token")] public string AccessToken { get; set; } [DataM
[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; }
}
当传入表示facebook会话的json对象时,属性secret和expires会正确绑定,但其余的不会,因为属性名与json密钥名不同。我希望datacontract序列化程序会尝试绑定到属性中提供的名称,但情况似乎并非如此。有人有什么解决方法的建议吗
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();
}
您可以将其作为字符串传入并手动调用datacontractdeserializer,除非您编写自己的modelbinder。我相信默认绑定器使用javascriptserializer,而不是datacontractjsserializer
我最终使用gt124的链接和来编写自己的模型绑定逻辑。结果是这样的:
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)。这些模型都是从一个空的基类JsonModel继承的。您不需要替换默认绑定器,只需编写一个这样的属性即可
public class DataContractJsonModelBinderAttribute : CustomModelBinderAttribute
{
public override IModelBinder GetBinder()
{
return new DataContractJsonModelBinder();
}
}
使用简单
[DataContract(Name = "session")]
[DataContractJsonModelBinder]
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; }
}
更新现在y可以简单地使用内置的Json.NET功能,如下所示:
[JsonObject]
public class FacebookSession
{
[JsonProperty("access_token")]
public string AccessToken { get; set; }
}
如果有必要
var facebokSession = JsonConvert.DeserializeObject<FacebookSession>(facebookSessionJsonString);
var facebokSession=JsonConvert.DeserializeObject(facebookSessionJsonString);
这不起作用,响应为=空。我的意思是,我可能可以在js调用中执行JSON.Stringify(),但这会让我感到难过。上面的示例可能会让您编写一个使用datacontractjsonserializer的modelbinder…确保替换默认的binder:in Application_Start:ModelBinders.Binders.DefaultBinder=new SmartModelBinder(new[]{new NewtonsoftJsonModelBinder()});