这2种Post方法之间有什么区别

Question

am a bit confused about the difference between this 2 lines:

req.OpenReadStream();

and

Request.Form.Files.GetFile("FileContent").OpenReadStream()

here is what i know so far and correct me if am wrong, i know that they are both meant to read a file, and the first method accept file only, however the second accept file and a json value,, but what i still dont understand is the difference in term of syntax

Here is a snippet from the post methods:

public IActionResult Post(IFormFile req)
{
    req.OpenReadStream();
    return Ok();
}

---

[HttpPost]
public IActionResult Post([FromForm] RequestModel req)
{
    Request.Form.Files.GetFile("FileContent").OpenReadStream()
    return Ok();
}

//....
public class RequestModel
{
    public string FileContent { get; set; }
    public string SomeRandomString { get; set; }    
}

Answer 1

None. They both belong to IFormFile .

The only difference is how you're accessing the interface.

In your first example you're accessing it directly as it's passed into the constructor of your method.

In your second example you're accessing it from the Files collection of the HttpRequest by getting the file using GetFile method that returns the said interface.

As Panagiotis Kanavos said, the later can not be tested at all.