如何在ASP.Net核心代码中上传图片并使用post man发送图片

在ASP.Net Core中上传图片并使用Postman发送图片，可以按照以下步骤进行：

在ASP.Net Core项目中，创建一个名为"UploadController"的控制器。确保已经添加了相关的NuGet包：Microsoft.AspNetCore.Http和Microsoft.AspNetCore.Mvc。
在"UploadController"中，创建一个名为"UploadImage"的方法，用于接收和处理图片上传请求。

using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using System.IO;
using System.Threading.Tasks;

[Route("api/[controller]")]
[ApiController]
public class UploadController : ControllerBase
{
    private readonly IWebHostEnvironment _hostingEnvironment;

    public UploadController(IWebHostEnvironment hostingEnvironment)
    {
        _hostingEnvironment = hostingEnvironment;
    }

    [HttpPost]
    [Route("image")]
    public async Task<IActionResult> UploadImage(IFormFile file)
    {
        if (file == null || file.Length == 0)
            return BadRequest("No file uploaded.");

        // 文件保存路径
        string filePath = Path.Combine(_hostingEnvironment.ContentRootPath, "uploads", file.FileName);

        using (var stream = new FileStream(filePath, FileMode.Create))
        {
            await file.CopyToAsync(stream);
        }

        return Ok("File uploaded successfully.");
    }
}

在ASP.Net Core项目的Startup.cs文件中，配置文件上传中间件和跨域访问。

using Microsoft.AspNetCore.Builder;
using Microsoft.Extensions.DependencyInjection;

public class Startup
{
    public void ConfigureServices(IServiceCollection services)
    {
        services.AddControllers();
    }

    public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
    {
        app.UseRouting();

        app.UseCors(builder =>
        {
            builder.AllowAnyOrigin()
                .AllowAnyMethod()
                .AllowAnyHeader();
        });

        app.UseEndpoints(endpoints =>
        {
            endpoints.MapControllers();
        });
    }
}