C# net core webAPI 提供上传文件接口，并提供net core调用示例

好的，下面是一个基于C# .NET Core的WebAPI上传文件接口示例：

[ApiController]
[Route("[controller]")]
public class FileUploadController : ControllerBase
{
    private readonly ILogger<FileUploadController> _logger;

    public FileUploadController(ILogger<FileUploadController> logger)
    {
        _logger = logger;
    }

    [HttpPost]
    public async Task<IActionResult> Upload(IFormFile file)
    {
        try
        {
            if (file == null || file.Length == 0)
                return Content("file not selected");

            var filePath = Path.Combine(Path.GetTempPath(), file.FileName);
            using (var stream = new FileStream(filePath, FileMode.Create))
            {
                await file.CopyToAsync(stream);
            }
            return Ok();
        }
        catch (Exception ex)
        {
            _logger.LogError(ex, "Error uploading file");
            return StatusCode(500);
        }
    }
}

以上代码实现了一个简单的文件上传接口，接收一个名为“file”的文件参数，将其保存到临时目录中。

下面是一个.NET Core调用示例：

public async Task UploadFile(string filePath)
{
    using (var httpClient = new HttpClient())
    {
        using (var form = new MultipartFormDataContent())
        {
            using (var stream = new FileStream(filePath, FileMode.Open))
            {
                using (var memoryStream = new MemoryStream())
                {
                    await stream.CopyToAsync(memoryStream);
                    var byteArrayContent = new ByteArrayContent(memoryStream.ToArray());
                    form.Add(byteArrayContent, "file", Path.GetFileName(filePath));
                    using (var response = await httpClient.PostAsync("http://localhost:5000/FileUpload", form))
                    {
                        response.EnsureSuccessStatusCode();
                    }
                }
            }
        }
    }
}

以上代码使用HttpClient将文件上传到WebAPI接口，其中“http://localhost:5000/FileUpload”是WebAPI的URL地址。