在属性路由中使用字典作为输入参数

Question

I have the following RESTful Action on an MVC-project:

[Route("save")]
[HttpPut]
public ActionResult UpdateAllSettings(Dictionary<string,object> values){}

Currently I am stuck sending values to that Action. I tried using the following JSON-Structure:

fancyData="'values':[{'key':'k1','value':'v1'}]";
$http({url:'myurl',data: fancyData}

but values is always null.

I also tried replacing Dictionary<string,object> by List<KeyValuePair<string,object>> with the same results

Answer 1

您必须告诉操作以在请求正文中查找数据：

public ActionResult UpdateAllSettings([FromBody]Dictionary<string,object> values){}

Answer 2

In this case it would be better that you decorate the values parameter with the FromBody attribute. This gives you the benefit that when creating the PUT request you can add the JSON -content as content to the request.

httpClient.PutAsync("URL", new StringContent("YOUR JSON HERE",
                                             Encoding.UTF8,
                                             "application/json"));

To have better reusability just derive from StringContent and create a JSONContent-class:

public sealed class JsonContent : StringContent
{
    public JsonContent(object content)
        : base(JsonConvert.SerializeObject(content))
    {
    }

    public JsonContent(object content, Encoding encoding)
        : base(JsonConvert.SerializeObject(content), encoding, "application/json")
    {
    }
}

Note I use Json.NET as JSON library

now you can modify it to:

httpClient.PutAsync("URL", new JsonContent(yourDictionaryHere,
                                           Encoding.UTF8,
                                           "application/json"));