Passing json to List<Dictionary<string, string>> to method-CodePudding

We have below API method which I need to debug. The API is being called from a web which at this moment I dont have access to so dont know whats the exact format of params being passed.

In the mean time I want construct a json so that I can pass to this method and debug. But whatever I pass its always null. Could you please share what am I doing wrong

[HttpPost]
public IActionResult PostData([FromBody] List<Dictionary<string, string>> data)
{
   //parse data here
}

The data param always comes out to be null, when I am passing below json. Since its null I cannot proceed further.

My swagger shows this is whats being expected but when I pass the same, it shows data param to be null:

[
  {
    "additionalProp1": "string",
    "additionalProp2": "string",
    "additionalProp3": "string"
  }
]

I have tried to modify the above json but keeps on saying null. Any input what the correct json would be

CodePudding user response：

if you don't know what to expect, the safest way is

[HttpPost]
public IActionResult PostData([FromBody] JToken data)
{
  //if you don't know
var json=data.ToString();
// or 
var prop1 = (string)data[0]["additionalProp1"];

// or it seems to me that you know what to expect
Dictionary<string,string>[] dict = data.ToObject<Dictionary<string,string>[]>();

}

the code will be working if you use Newtonsoft.Json

using Newtonsoft.Json.Serialization;


services.AddControllers()
.AddNewtonsoftJson(options =>
  options.SerializerSettings.ContractResolver =
        new CamelCasePropertyNamesContractResolver());

but I guess you can find analogical code for text.json

Your action with a dictionary should be working too. I am afraid that you are creating a wrong http request or http request body. Post the code are you using

CodePudding user response：

You could try JsonConvert.DeserializeObject<List<Dictionary<string, string>>>(data)

It sometimes works when FromBody attribute doesn't.