RC的WebAPI与GETALL的URI参数 [英] WebAPI RC GetAll with URI parameters

问题描述

previously中的WebAPI（测试版），我能够创造一个GETALL方法，它参加了在URI中添加了可选的参数：

Previously in WebAPI (beta) I was able to create a "GetAll" method that took in optional parameters added on the URI:

http://localhost/api/product?take=5&skip=10 

这似乎仍然工作，但只有当我包括所有的参数。在（测试版），我可以忽略的参数（的http：//本地主机/ API /产品/ ）和GETALL的方法将被调用（以＆安培;跳过会为null）。我也可以省略一些参数的http：//本地主机/ API /产品取= 5 （跳过会为null）

This still seems to work but only if I include all the parameters. In (beta), I could omit the parameters ( http://localhost/api/product/ ) and the "GetAll" method would get called (take & skip would be null). I could also omit some of the parameters http://localhost/api/product?take=5 (skip would be null)

public IEnumerable<ProductHeaderDto> GetAll(int? take, int? skip)
{
    var results = from p in productRepository
                  select new ProductHeaderDto
                    {
                        Id = p.Id,
                        Version = p.Version,
                        Code = p.Code,
                        Description = p.DescriptionInternal,
                        DisplayName = p.Code + " " + p.DescriptionInternal
                    };
    if (skip != null) results = results.Skip(skip.Value);
    if (take != null) results = results.Take(take.Value);
    return results;
}

在（RC），现在我得到没有采取任何的控制器产品与请求匹配找到。如果参数的两个或者一个人失踪。我曾尝试在方法的参数中加入[FromUri]但是这并没有影响：

In (RC), I now get "No action was found on the controller 'Product' that matches the request." when both or one of the parameters are missing. I have tried adding [FromUri] on the method parameters but that has no affect:

public IEnumerable<ProductHeaderDto> GetAll([FromUri] int? take, [FromUri] int? skip)

我自己也尝试设置默认值：

I have also tried setting default values:

public IEnumerable<ProductHeaderDto> GetAll(int? take = null, int? skip = null)

时有某种形式的可选的参数属性，可以试图匹配方法签名时，可以使用？

Is there some sort of "optional" parameter attribute that could be used when trying to match the method signature?

推荐答案

这是已被固定在RTM的错误。您可以通过指定默认值可选参数。

This is a bug which has been fixed in RTM. You can have optional parameter by specifying default value.

public IEnumerable<string> Get(int? take = null, int? skip = null)

顺便说一句，你可以用$跳过和$顶部网页API ODATA包< /一>来实现相同的功能。

BTW, you can use $skip and $top in web api odata package to achieve the same functions.

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