How to pass json array as a string to web api from postman

Question

My Json [Body] structure in postman is given below

[{
  "SerialNumber": "dev1",

  "CustomerId": "cust1",

  "Seed": "c393d900-2f25-819f-cc83-0721357bcf10",

  "BitLockerKey": null,

  "bitLockerRecoveryKey": null

   },

 {

  "SerialNumber": "dev2",

  "CustomerId": "cust2",

  "Seed": "c393d900-2f25-819f-cc83-0721357bcf22",

  "BitLockerKey": null,

  "bitLockerRecoveryKey": null

}]

My web api function is given below,

    [HttpPost]
    public ActionResult<string> SaveData([FromBody] string Data)
    {
        int result = _seedService.SeedGeneration(Data);
        return result > 0 ? Ok(result) : (ActionResult<string>)UnprocessableEntity("Seed generation 
        Failed");
    }

My question is, how to pass data as string with json array structure in postman. i got the error "JSON value could not be converted to System.string

Noufal · Accepted Answer · 2020-12-29 05:13:49Z

1

I have installed Microsoft.AspNetCore.Mvc.NewtonsoftJson package & modified the function. removed string as parameter & included JsonElement in parameter.

[HttpPost]

public ActionResult<string> SaveData([FromBody] JsonElement Data)
{
    string json = System.Text.Json.JsonSerializer.Serialize(Data);
    int result = _seedService.SeedGeneration(json);
    return result > 0 ? Ok(result) : (ActionResult<string>)UnprocessableEntity("Seed 
    generation Failed");
}

answered Dec 29, 2020 at 5:13

Noufal

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Comments

Lucas SIlva · Accepted Answer · 2020-12-29 04:57:40Z

0

Using JSON.stringify(jsonValue) you can convert a JSON object to string via javascript.

The result is the following:

"[{"SerialNumber":"dev1","CustomerId":"cust1","Seed":"c393d900-2f25-819f-cc83-0721357bcf10","BitLockerKey":null,"bitLockerRecoveryKey":null},{"SerialNumber":"dev2","CustomerId":"cust2","Seed":"c393d900-2f25-819f-cc83-0721357bcf22","BitLockerKey":null,"bitLockerRecoveryKey":null}]"

You can also declare the action parameter as an array of an object with the structure of your Json and the Asp.Net mechanism you handle it for you.

answered Dec 29, 2020 at 4:57

Lucas SIlva

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