CODEWITHSUNDEEP
c#asp.netjsonasp.net-web-api
spb
spb

Reputation: 4239

return an array of strings .net c# web api

I'm new to c# and the whole .net platform so I'm struggling with a lot of what are probably pretty basic things. go easy on me. All I'm trying to do right now is return an array of json objects (as strings, obviously). 

[HttpPost]
public string[] PostJsonString([FromBody] string[] arr)
    {

        return arr;

    }

And in Postman, I'm sending

[{"someProp":"someVal"},{ "aThing":"someOtherThing"}]

So painfully simple... Literally only trying to respond with the exact contents of the request body, but for some reason I get back an empty array. Does anyone have any idea why this might be? I've tried returning the array as a string with str.toArray but then I get back the object type, i.e. "System.String[]". I just want a simple JSON response with the objects in an array.

Any tips are appreciated. Even if it's just pointing me to a helpful resource. I've exhausted all the relevant S/O questions and a) don't see one that quite addresses what i'm trying to accomplish, and b) have still tried some of the solutions to no avail.

Upvotes: 5

Views: 4828

Answers (2)

s k
s k

Reputation: 5212

[HttpPost]
public JsonResult PostJsonString([FromBody] string[] arr)
{
    return Json(arr);
}

Upvotes: 2

Amadeusz Wieczorek
Amadeusz Wieczorek

Reputation: 3207

Your controller will receive a single string

"[{\"someProp\":\"someVal\"},{ \"aThing\":\"someOtherThing\"}]"

Change the method's signature to 

public string PostJsonString([FromBody] string arr)

When you want to work with the JSON array, I recommend using JSON.net (aka Newtonsoft.Json) and JArray.Parse or JObject.Parse

using Newtonsoft.Json
// ...
JArray a = JArray.Parse(json);

Upvotes: 1

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