ASP Core WebApi Test File Upload Using Postman

Answer :

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

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: