Question 86014 in ASP.NET Question posted in
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ASP.Net API how to let API accept an IFromFile and an object at the same API call

I have the following API that works properly

[HttpPost("testing")]
public string Testing(IFormFile file, string str, int num)
{
  return str + num.ToString();
}

What I want to do ideally is to pass "str" and "num" in an object instead of each param on its own

Like this:

public class Testdto
{
  public int Num{ get; set; }
  public string Str { get; set; }
}

[HttpPost("testing")]
public string Testing(IFormFile file, Testdto dto)
{
 return dto.Str + dto.Num.ToString();
}

Of course the above format rends an error, it does not work.

Is there a way to make it work? My real API body is quite large and contains nested objects so I can’t just pass them all as params in the API

Tags:

2

Answers


  1. 0

    add the FromForm Attribute :

    [HttpPost("testing")]
        public string Testing(IFormFile file, [FromForm]testdto dto)
        {
            return dto.str + dto.num.ToString();
        }

    And add the parameters to request form

    The result:

    enter image description here

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  2. 0

    You can also create class having properties as IFormFile and other fileds.

    And pass it to your controller with [FromForm] attribute

    Sample Code:

     [HttpPost]
 [Route("FileUpload")]
 public ActionResult FileUploaded([FromForm] PostRequest postRequest) 
 {
    return Ok(postRequest.str);
 }

     public class PostRequest 
 {
    public int Num { get; set; }           
    public string Str { get; set; }           
    public IFormFile File { get; set; }    
 }
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