问使用jQuery $.ajax()将JSON数据传递给带有自定义BindingModel的.NET MVC操作时出现问题

EN

$('#btnPatientSearch').click(function() {

  var patientFilter = {
    LastName: 'Flinstone',
    FirstName: 'Fred'
  };

  var jsonData = $.toJSON(patientFilter);

  $.ajax({
    url: '/Services/GetPatientList',
    type: 'GET',
    cache: false,
    data: jsonData,
    contentType: 'application/json; charset=utf-8',
    dataType: 'json',
    timeout: 10000,
    error: function() {
      alert('Error loading JSON=' + jsonData);
    },
    success: function(jsonData) {
      $("#patientSearchList").fillSelect(jsonData);
    }
  });

[ModelBinder(typeof(JsonModelBinder))]
public class PatientFilter
{

  #region Properties

  public string IDNumber { get; set; }
  public string FirstName { get; set; }
  public string LastName { get; set; }
  public string SSN { get; set; }
  public DateTime DOB { get; set; }

  #endregion
}

  public JsonResult GetPatientList(iPatientDoc.Models.PatientFilter patientFilter)
  {

public class JsonModelBinder : IModelBinder
{
  #region IModelBinder Members

  public object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)
  {
    if (controllerContext == null)
      throw new ArgumentNullException("controllerContext");
    if (bindingContext == null)
      throw new ArgumentNullException("bindingContext");

    var serializer = new DataContractJsonSerializer(bindingContext.ModelType);
    return serializer.ReadObject(controllerContext.HttpContext.Request.InputStream);
  #endregion

  }
}