ASP Core WebApi Test File Upload using Postman

Question

I have created an endpoint that takes an arbitrary file:

[HttpPost()]
public async Task<IActionResult> CreateFile(IFormFile file)

When I test it with Postman, the file is always null.

Here is what I am doing in Postman:

What am I doing wrong?

Answer 1

Thanks to @rmjoia's comment I got it working! Here is what I had to do in Postman:

Answer 2

The complete solution for uploading file or files is shown below:

• This action use for uploading multiple files:

  // Of course this action exist in microsoft docs and you can read it. HttpPost("UploadMultipleFiles")] public async Task<IActionResult> Post(List<IFormFile> files) {      long size = files.Sum(f => f.Length);      // Full path to file in temp location     var filePath = Path.GetTempFileName();      foreach (var formFile in files)     {         if (formFile.Length > 0)             using (var stream = new FileStream(filePath, FileMode.Create))                 await formFile.CopyToAsync(stream);     }      // Process uploaded files      return Ok(new { count = files.Count, path = filePath}); } 

The postman picture shows how you can send files to this endpoint for uploading multiple files:

• This action use for uploading single file:

  [HttpPost("UploadSingleFile")] public async Task<IActionResult> Post(IFormFile file) {      // Full path to file in temp location     var filePath = Path.GetTempFileName();      if (file.Length > 0)         using (var stream = new FileStream(filePath, FileMode.Create))             await file.CopyToAsync(stream);      // Process uploaded files      return Ok(new { count = 1, path = filePath}); } 

The postman picture shows how you can send a file to this endpoint for uploading single file:

Answer 3

Your should be like that

 [HttpPost]       
   public async Task<IActionResult> UploadFile([FromForm]UploadFile updateTenantRequest)
        {
}

Your class should be like:-

public class UpdateTenantRequestdto
    {


        public IFormFile TenantLogo { get; set; }
    }

and then