User interface 如何解决来自Swagger UI的错误请求？

我使用的是Swagger用户界面（版本：3.9.59）。 我编写了一个名为GetProduct的ServiceStack合同。代码如下

[Route("/products/{Id}",
Verbs="GET",
Notes = "Gets the product by id",
Summary = "Object that doesn't need to be created directly")]
[Api("Get the product by id")]
[ApiResponse(HttpStatusCode.NotFound, "No products have been found in the repository")]
public class GetProduct
{  
   [ApiMember(AllowMultiple = false,
    DataType = "int",
    Description = "Represents the ID passed in the URI",
    IsRequired = false,
    Name = "Id",
    ParameterType = "int",
    Verb = "GET")]
    [ApiAllowableValues("family", typeof(int))] //Enum
    public int Id { get; set; }
}

在我通过Google Chrome运行Swigger UI之后，我看到了图1。我在图1中的文本框中输入了一些产品id，如1，然后单击按钮“试用！”

但我得到了一个例外。详情如下

[Route("/products/{Id}",
Verbs="GET",
Notes = "Gets the product by id",
Summary = "Object that doesn't need to be created directly")]
[Api("Get the product by id")]
[ApiResponse(HttpStatusCode.NotFound, "No products have been found in the repository")]
public class GetProduct
{  
   [ApiMember(AllowMultiple = false,
    DataType = "int",
    Description = "Represents the ID passed in the URI",
    IsRequired = false,
    Name = "Id",
    ParameterType = "int",
    Verb = "GET")]
    [ApiAllowableValues("family", typeof(int))] //Enum
    public int Id { get; set; }
}

返回的请求URL是“{Id}？api_key=special key”

返回的响应正文是

{
  "ResponseStatus": {
  "ErrorCode": "RequestBindingException",
  "Message": "Unable to bind request",
  "StackTrace": "   in ServiceStack.WebHost.Endpoints.RestHandler.GetRequest(IHttpRequest httpReq, IRestPath restPath)\r\n   in ServiceStack.WebHost.Endpoints.RestHandler.ProcessRequest(IHttpRequest httpReq, IHttpResponse httpRes, String operationName)"
   }
}

Date: Tue, 08 Dec 2015 09:44:13 GMT
Server: Microsoft-IIS/8.0
X-AspNet-Version: 4.0.30319
X-Powered-By: ASP.NET
Content-Type: application/json; charset=utf-8
Cache-Control: private
X-SourceFiles: =?UTF-8?B?RDpcWWFuZ0xpXOWFrOWPuOi1hOaWmVxQcm9qZWN0c1xTZXJ2aWNlU3RhY2tc5a2m5Lmg6LWE5paZXOS5puexjea6kOeggVxTZXJ2aWNlU3RhY2sgU3VjY2luY3RseVzop6Pljovku7bvvIjlj6/kv67mlLnvvIlcQ2hhcHRlcjEyIC0gRG9jdW1lbnRpbmcgV2ViIFNlcnZpY2VzXFNlcnZpY2VTdGFjay5TdWNjaW5jdGx5Lkhvc3RccHJvZHVjdHNce0lkfQ==?=
Content-Length: 346

返回的响应代码为400

返回的响应标题为

{
  "ResponseStatus": {
  "ErrorCode": "RequestBindingException",
  "Message": "Unable to bind request",
  "StackTrace": "   in ServiceStack.WebHost.Endpoints.RestHandler.GetRequest(IHttpRequest httpReq, IRestPath restPath)\r\n   in ServiceStack.WebHost.Endpoints.RestHandler.ProcessRequest(IHttpRequest httpReq, IHttpResponse httpRes, String operationName)"
   }
}

Date: Tue, 08 Dec 2015 09:44:13 GMT
Server: Microsoft-IIS/8.0
X-AspNet-Version: 4.0.30319
X-Powered-By: ASP.NET
Content-Type: application/json; charset=utf-8
Cache-Control: private
X-SourceFiles: =?UTF-8?B?RDpcWWFuZ0xpXOWFrOWPuOi1hOaWmVxQcm9qZWN0c1xTZXJ2aWNlU3RhY2tc5a2m5Lmg6LWE5paZXOS5puexjea6kOeggVxTZXJ2aWNlU3RhY2sgU3VjY2luY3RseVzop6Pljovku7bvvIjlj6/kv67mlLnvvIlcQ2hhcHRlcjEyIC0gRG9jdW1lbnRpbmcgV2ViIFNlcnZpY2VzXFNlcnZpY2VTdGFjay5TdWNjaW5jdGx5Lkhvc3RccHJvZHVjdHNce0lkfQ==?=
Content-Length: 346

谷歌浏览器返回了以下信息。

图：

如何解决上述问题