Question

我正在将旧服务迁移到Asp.net，并且需要保留旧的请求格式。挑战在于POST正文参数的数量是可变的，而数量由count参数指定。例如...

COUNT = 3＆PARAM1 = A＆PARAM2 = B＆PARAM3 = C

我正在使用ApiController进行另一个调用，并且效果很好。但是在这种情况下，我不知道如何在不创建大量占位符属性（PARAM1，PARAM2，...，PARAM100）的情况下定义模型。

所以..如果我有这个..

public class MyController : ApiController
{
  public HttpResponseMessage MyService(MyServiceRequest request)
  {
  }
}

如何定义MyServiceRequest类，以便可以访问PARAM1，PARAM2等（而不必预定义比我认为需要的更多PARAM属性）？

public class MyServiceRequest
{
    public string COUNT { get; set; }

    /* Don't want to have to do this
    public string PARAM1 { get; set; }
    public string PARAM2 { get; set; }
    :
    public string PARAM1000 { get; set; }
    */
}

谢谢！

Answer 1

考虑实现自定义模型活页夹

//using System.Web.Http.ModelBinding;
public class LegacyBinder : IModelBinder
{
    public bool BindModel(HttpActionContext actionContext, ModelBindingContext bindingContext)
    {
        //reading request data
        NameValueCollection formData = actionContext.ControllerContext.Request.Content.ReadAsFormDataAsync().GetAwaiter().GetResult();

        var model = new MyServiceRequest
        {
            Params = new List<string>()
        };
        model.Count = formData["count"];

        foreach (string name in formData)
        {
            //simple check, "param1" "paramRandomsring" will pass
            //if (name.StartsWith("param", StringComparison.InvariantCultureIgnoreCase))
            //more complex check ensures "param{number}" template
            if (Regex.IsMatch(name, @"^param\d+$", RegexOptions.IgnoreCase))
            {
                model.Params.Add(formData[name]);
            }
        }

        bindingContext.Model = model;
        return true;
    }
}

并告诉框架将该模型绑定器用于具体模型

[ModelBinder(typeof(LegacyBinder))]
public class MyServiceRequest
{
    public string Count { get; set; }

    public List<string> Params { get; set; }
}

在docs中了解有关ASP.NET Web API中的模型绑定的更多信息。

Answer 2

在这种情况下，我通常使用(9) (4 170) (1 6) (null null) (null null)(null null)(null null)(30 null) <-- no way to reach node 30参数：

def nameOfBestCustomer(sales, customers) :
    #@param: sales and customers lists
    #@return: none

    bestCustomers = []
    salesMax = 0

    salesMax = max(sales)
    for i, sale in enumerate(sales):
        if sale == salesMax:
            bestCustomers.append(customers[i])

    print("The best customer of the day was", end='')
    for customer in bestCustomers:
        print(' ' + customer, end='')
    print('.')

Asp.net ApiController：如何在请求模型中表示变量参数

2 个答案: