Problems sending json from postman

Question

I have a model with a List<string> Parameters {get; set;} property, so when I send from postman a json like this

{
    ...,
    "Parameters" :
    [
        ["FirstParam"],
        ["SecondParam"]
    ],
    ...
}

I receive null in my controller method, I mean the requestModel is null

public JsonResult GetBalances([FromBody]RequestModel requestModel)
{
    ...
}

I know that "Parameters" is the problem because when I send without it, I receive the model normally.

How can I receive a list of parameters(string) from a json format?

PD. It works when I create a model like

public class RequestModel
{
    ...
    public List<Parameters> Parameters {get;set;}
}

public class Parameters 
{ 
    public string Name {get;set;} 
}

And the json

{
    ...,
    "Parameters" : [
        {"Name": "FirstParameter"}, 
        {"Name":"SecondParameter"}
    ]
    ...
}

But I wonder if it is possible get it without create a class. Thanks in advance.

JPocoata · Accepted Answer · 2017-12-06 14:44:35Z

1

I found the problem, the json format was wrong. My final json:

{
    ...,
    "Parameters" :
    [
        "FirstParam",
        "SecondParam"
    ],
    ...
}

I think I was sending a list of arrays of strings (or something like that). Now I can use List<string> as a property in my model.

answered Dec 6, 2017 at 14:44

JPocoata

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3 Comments

JPocoata Over a year ago

Both json are valid, the thing is one is an array and the other one is a array of arrays I think

lcryder Over a year ago

Run the JSON through json2csharp.com ...it will show you the json represented as classes.

JPocoata Over a year ago

Great tool!, I got List<List<string>>, that was my error. Thanks

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