How to convert String response (Text) to JSON response in .net core

Question

I need to convert String response to Json response. But I have to use different way to fix my issue but I couldn't able to find any good solution for that.

if (response.IsSuccessStatusCode)
{
    string successResponse = "Order Created Successfully with InterfaceRecordId : " + order.WMWDATA.Receipts.Receipt.InterfaceRecordId + " & ReceiptId : " +
      order.WMWDATA.Receipts.Receipt.ReceiptId;
    _logger.LogInformation(successResponse);
    return StatusCode((int)response.StatusCode, successResponse);
}
_logger.LogError(jsonResponse);
return StatusCode((int)response.StatusCode, jsonResponse);

I just need to send this successRespose as JSON response. Can you please help me to resolve this.

BTW, a string is already a valid JSON object, so what error are you having defining a jsonReponse string variable? — OneCricketeer
– OneCricketeer, Commented Feb 18, 2022 at 17:55
@OneCricketeer no I have checked in the Postman. It is sending text format response. So do you have any idea. — user17870723
– user17870723, Commented Feb 18, 2022 at 17:58
@OneCricketeer, It is not sending any errors , but response is coming as text. So i need to get json format in postman — user17870723
– user17870723, Commented Feb 18, 2022 at 18:01
1) You need to return a header for application/json 2) You may want to try returning a Dictionary object rather than just a string if you want an object of key value pairs — OneCricketeer
– OneCricketeer, Commented Feb 18, 2022 at 18:04
You may want to read solutions at stackoverflow.com/questions/42360139/… — OneCricketeer
– OneCricketeer, Commented Feb 18, 2022 at 18:06

haldo · Accepted Answer · 2022-02-18 20:05:31Z

Please have a read over Format response data in ASP.NET Core Web API. There are multiple possibilities, depending on what your exact requirements are.

The simplest option is to add [Produces] attribute to the controller action, specifying the type that's returned from the aciton:

[Produces("application/json")]
public IActionResult YourAction(int id) { ... }

The above action will return application/json even when the return type of the action is string.

However, it looks like you're returning two values in the string (InterfaceRecordId and ReceiptId). You can use built-in methods (such as Ok(), BadRequest(), Created(), NotFound(), etc) which convert the object to JSON and return a specific status code.

I would recommend returning an object containing both values, and use a convenience return method (Created() or CreatedAtAction()). The following returns an anonymous object and status code 201:

var successResponse = new 
{ 
    InterfaceRecordId = order.WMWDATA.Receipts.Receipt.InterfaceRecordId,
    ReceiptId = order.WMWDATA.Receipts.Receipt.ReceiptId
}

return CreatedAtAction(nameof(YourAction), successResponse);

The CreatedAtAction (and Created) convenience methods return a 201 (created) HTTP Code - so the client will be able to infer that from the status code. And since it's returning an object (rather than a string), the return type defaults to application/json, so there's no need for the [Produces] attribute.

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