我正在寻找一种在一个请求中发送模型和图像的方法。我尝试从正文发送我的模型,但我不知道如何发送文件。除了在不同的文件中发送图像和模型之外,还有其他方法吗?
这是我的 API 中的 POST 方法:
[HttpPost]
[Route("UploadNewEvent")]
public async Task<IActionResult> CreateNewEventAsync([FromBody] EventModel model)
{
var file = this.Request.Form.Files.LastOrDefault();
if (file != null)
{
var uploads = Path.Combine(_environment.WebRootPath, "uploads");
using (var fileStream = new FileStream(Path.Combine(uploads, "test.jpg"), FileMode.Create))
{
await file.CopyToAsync(fileStream);
}
}
// do sth with model later
return Ok();
}
这是我的应用程序的代码:
public async Task SendNewEvent(EventModel model, MediaFile photo)
{
var uri = $"{baseUri}api/User/Event/CreateNewEvent";
if (photo != null)
{
var multipartContent = new MultipartFormDataContent();
multipartContent.Add(new StreamContent(photo.GetStream()), "\"file\"", $"\"{photo.Path}\"");
var httpClient = new HttpClient();
var jsonObject = JsonConvert.SerializeObject(model);
var stringContent = new StringContent(jsonObject, Encoding.UTF8, "application/json");
var httpResponseMessage = await httpClient.PostAsync(uri, stringContent);
}
}
要通过文件参数传递模型,您需要将数据作为表单数据发布。
请按照以下步骤操作:
-
Change FromBody
to FromForm
[HttpPost]
[Route("UploadNewEvent")]
public async Task<IActionResult> CreateNewEventAsync([FromForm] EventModel model)
{
// do sth with model later
return Ok();
}
-
更改客户端代码以发送表单数据而不是 json 字符串
var uri = $"https://localhost:44339/UploadNewEvent";
FileStream fileStream = new FileStream(@"filepath\T1.PNG", FileMode.Open);
var multipartContent = new MultipartFormDataContent();
multipartContent.Add(new StreamContent(fileStream), "\"file\"", @"filepath\T1.PNG");
// EventModel other fields
multipartContent.Add(new StringContent("2"), "Id");
multipartContent.Add(new StringContent("Tom"), "Name");
var httpClient = new HttpClient();
var httpResponseMessage = httpClient.PostAsync(uri, multipartContent).Result;
-
事件模型
public class EventModel
{
public int Id { get; set; }
public string Name { get; set; }
public IFormFile File { get; set; }
}
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