.Net Core2.2 WebApi上傳文件

基於.net core2.2的webapi程式,接收客戶端上傳的文件.按照以下寫法,file的值永遠是null

[HttpPost]
public void Post([FromForm] IFormFile file)
{

}

一.有兩種方法解決這個問題:

1.屬性綁定.在[FromForm]里添加Name屬性如:[FromForm(name = "file")]，客戶端調用時需要保持一致

// POST api/values
[HttpPost]
public void Post([FromForm(Name = "file")] IFormFile file)
{
}

還可以和其他參數一起傳過來

 // POST api/<controller>
        [HttpPost]
        public async Task<IActionResult> UploadFile(string fileName,[FromForm(Name ="file")]IFormFile formFile)

PostMan測試,註意參數名要保持一致,否則收到的值為null

2.通過Request.Form.Files獲取文件,客戶端可以任意指定name

 // POST api/values
[HttpPost]
        public void Post()
        {
            IFormFile formFile= Request.Form.Files[0];
            var filePath = @"D:\UploadingFiles\" + formFile.FileName;

            if (formFile.Length > 0)
            {
                using (var stream = new FileStream(filePath, FileMode.Create))
                {
                    formFile.CopyTo(stream);
                }
            }
        }

 二.客戶端調用代碼

  var request = new RestRequest(Method.POST);
            request.AddFile("file", @"d:\1.jpg");
            var restClient = new RestClient("http://localhost:63270/api/values");
            IRestResponse response = restClient.Execute(request);