ASP.NET Core 2.1中[ApiController]中的POST操作 [英] POST actions in [ApiController] in ASP.NET Core 2.1

问题描述

我有以下ASP.NET Core 2.1 Api控制器:

I have the following ASP.NET Core 2.1 Api controller:

[Route("api/[controller]")]
[ApiController]
public class ImagesController : ControllerBase
{
    [HttpPost("[action]")]
    public async Task<IActionResult> Upload([FromForm]ICollection<IFormFile> files)
    { ... }

    [HttpGet("thumbnails")]
    public async Task<IActionResult> GetThumbNails()
    { ... }

GET和POST动作均与Postman一起使用.

Both the GET and POST actions worked with Postman.

但是，POST操作不适用于UI:该操作将始终接收文件参数计数0(请参阅

However, the POST action would not work with the UI: the action would always receive a files parameter count of 0 (see here for full details of the fault).

我最终通过从控制器中删除[ApiController]属性来解决该错误:

I eventually fixed the fault by removing the [ApiController] attribute from the controller:

[Route("api/[controller]")]
//[ApiController]
public class ImagesController : ControllerBase
{ ... }

我的问题是为什么[ApiController]控制器属性阻止POST方法从UI接收文件?这是怎么回事是路由问题吗?

My question is why did the [ApiController] controller attribute prevent the POST method from receiving the files from the UI? What is happening here? Is it a routing problem?

推荐答案

您需要设置兼容版本:

services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_1);

根据 https://docs.microsoft.com/en-us/aspnet/core/web-api/?view=aspnetcore-2.1

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