private static Hub TryGetHub(HttpContext httpContext, Type hubType)
{
Hub hub = null;
IValueProvider valueProvider = ValueProviderFactories.Factories.GetValueProvider(httpContext);
IModelBinderInvoker binderInvoker = new DefaultModelBinderInvoker();
foreach (var constructor in hubType.GetConstructors(
BindingFlags.CreateInstance |
BindingFlags.Instance |
BindingFlags.Public)
.OrderByDescending(x => x.GetParameters().Length))
{
var parameters = constructor.GetParameters();
if (parameters == null || parameters.Length == 0)
{
hub = constructor.Invoke(null) as Hub;
break;
}
else
{
var index = 0;
List <object> parameterValues = new List <object>();
for (; index < parameters.Length; index++)
{
if (binderInvoker.TryBindModel(httpContext, valueProvider, parameters[index], out var value))
{
parameterValues.Add(value);
}
else
{
break;
}
}
if (index == parameters.Length)
{
hub = constructor.Invoke(parameterValues.ToArray()) as Hub;
break;
}
}
}
return(hub);
}
internal bool TryBindingParameter(Controller controller, out ParameterDescriptor[] paramDescriptors)
{
int index;
paramDescriptors = GetParameters(controller.ControllerContext);
if (paramDescriptors == null)
{
return(false);
}
if (paramDescriptors.Length == 0)
{
controller.ControllerContext.ParameterDescriptors = null;
return(true);
}
IModelBinderInvoker binderInvoker = new DefaultModelBinderInvoker();
IValueProvider valueProvider = ValueProviderFactories.Factories.GetValueProvider(controller.HttpContext);
for (index = 0; index < paramDescriptors.Length; index++)
{
if (binderInvoker.TryBindModel(controller.HttpContext, valueProvider, paramDescriptors[index].ParameterInfo, out var value))
{
paramDescriptors[index].ParameterValue = value;
}
else
{
break;
}
//if (!String.IsNullOrWhiteSpace(controller.ControllerContext.RouteEntity.ParameterValue) &&
// String.Equals(controller.ControllerContext.RouteEntity.DefaultParameter,
// paramDescriptors[index].ParameterName,
// StringComparison.OrdinalIgnoreCase))
//{
// if (controller.ControllerContext.RouteEntity.ParameterValue != null)
// {
// TypeConverter converter = TypeDescriptor.GetConverter(paramDescriptor.ParameterType);
// try
// {
// var value = converter.ConvertTo(controller.ControllerContext.RouteEntity.ParameterValue, paramDescriptor.ParameterType);
// paramDescriptors[index].ParameterValue = value;
// continue;
// }
// catch
// {
// }
// }
//}
//var binderProviders = Services.GetRequiredService<IModelBinderProvider>();
//var modelBinder = binderProviders.GetBinder(paramDescriptor.ParameterType);
//var modelMetadata = Services.GetRequiredService<IModelMetadataProvider>().GetMetadataForType(null, paramDescriptor.ParameterType);
////var modelBinderModelBinders.Binders.GetBinder(paramDescriptor.ParameterType);
//if (TryBindModel(modelBinder, modelMetadata, controller, "", out var paramValue))
//{
// paramDescriptors[index].ParameterValue = paramValue;
// continue;
//}
//if (TryBindModel(modelBinder, modelMetadata, controller, paramDescriptor.ParameterName, out paramValue))
//{
// paramDescriptors[index].ParameterValue = paramValue;
// continue;
//}
//// 尝试依赖注入
//modelBinder = binderProviders.GetBinder(typeof(IServiceProvider));
//if (TryBindModel(modelBinder, modelMetadata, controller, "", out paramValue))
//{
// paramDescriptors[index].ParameterValue = paramValue;
// continue;
//}
//if (DefaultParamterValue.TryGetDefaultValue(paramDescriptor.ParameterInfo, out paramValue))
//{
// // 注：默认值可能为Null
// paramDescriptors[index].ParameterValue = paramValue;
// continue;
//}
//else if(TypeHelper.IsNullableValueType(modelMetadata.ModelType))
//{
// paramDescriptors[index].ParameterValue = null;
// continue;
//}
//else
//{
// break;
//}
}
if (index < paramDescriptors.Length)
{
return(false);
}
controller.ModelState.ModelWrappers = paramDescriptors
.Select(param => new ModelWrapper
{
ModelName = param.ParameterName,
Model = param.ParameterValue,
ModelType = param.ParameterType
});
return(true);
}
