.net core webapi 大文件上传到wwwroot文件夹的操作代码

1.配置staticfiles(program文件中)

 app.UseStaticFiles();

2.在wwwroot下创建upload文件夹
3.返回结果封装

namespace webapi;/// 
/// 统一数据响应格式/// 
public class Results{    /// 
    /// 自定义的响应码，可以和http响应码一致，也可以不一致    /// 
    public int Code { get; set; }    /// 
    /// 中文消息提示    /// 
    public string? Msg { get; set; }    /// 
    /// 是否成功    /// 
    public bool Success { get; set; }    /// 
    /// 响应的数据    /// 
    public T? Data { get; set; }    /// 
    /// 返回的Token: 如果有值，则前端需要此这个值替旧的token值    /// 
    public string? Token { get; set; }    /// 
    /// 设置数据的结果    /// 
    /// 数据    ///     public static Results DataResult(T data)    {        return new Results { Code = 1, Data = data, Msg = "请求成功", Success = true };    }    /// 
    /// 响应成功的结果    /// 
    ///     ///     public static Results SuccessResult(string msg = "操作成功")    {        return new Results { Code = 1, Data = default, Msg = msg, Success = true };    }    /// 
    /// 响应失败的结果    /// 
    ///     ///     public static Results FailResult(string msg = "请求失败")    {        return new Results { Code = -1, Data = default, Msg = msg, Success = false };    }    /// 
    /// 参数有误    /// 
    ///     ///     public static Results InValidParameter(string msg = "参数有误")    {        return new Results { Code = -1, Data = default, Msg = msg, Success = false };    }    /// 
    /// 获取结果    /// 
    ///     ///     ///     ///     ///     public static Results GetResult(int code = 0, string? msg = null, T? data = default, bool success = true)    {        return new Results { Code = code, Data = data, Msg = msg, Success = success };    }    /// 
    /// 设置token结果    /// 
    ///     ///     public static Results TokenResult(string token)    {        return new Results { Code = 1, Data = default, Msg = "请求成功", Success = true, Token = token };    }}

4.创建一个新的控制器

using Microsoft.AspNetCore.Mvc;using Microsoft.AspNetCore.WebUtilities;using Microsoft.Net.Http.Headers;namespace webapi.Controllers;/// 
/// 文件上传/// 
[ApiController][Route("[controller]/[action]")]public class UploadController : ControllerBase{    private readonly IWebHostEnvironment _hostEnvironment;    /// 
    /// 注入服务    /// 
    ///     public UploadController(IWebHostEnvironment hostEnvironment)    {        _hostEnvironment = hostEnvironment;    }    /// 
    /// 上传文件（支持多文件/大文件500M）    /// 
    ///     [HttpPost]    [RequestFormLimits(MultipartBodyLengthLimit = 609715200)]    [RequestSizeLimit(609715200)]    public async Task<Results<List>> UploadFile()    {        var request = HttpContext.Request;        if (!request.HasFormContentType ||            !MediaTypeHeaderValue.TryParse(request.ContentType, out var mediaTypeHeader) ||            string.IsNullOrEmpty(mediaTypeHeader.Boundary.Value))        {            return Results<List>.FailResult("文件类型不支持");        }        var reader = new MultipartReader(mediaTypeHeader.Boundary.Value, request.Body);        var section = await reader.ReadNextSectionAsync();        List serverFilePathList = new();        while (section != null)        {            var hasContentDispositionHeader = ContentDispositionHeaderValue.TryParse(section.ContentDisposition,                out var contentDisposition);            if (hasContentDispositionHeader && contentDisposition!.DispositionType.Equals("form-data") &&                !string.IsNullOrEmpty(contentDisposition.FileName.Value))            {                // 获取文件后缀名                var extension = Path.GetExtension(contentDisposition.FileName.Value);                // 为文件重命名，防止文件重名                var fileName = DateTime.Now.ToString("yyyyMMddHHmmssfff") + extension;                // 文件保存的文件夹路径                var uploadPath = Path.Combine(_hostEnvironment.WebRootPath, "upload");                if (!Directory.Exists(uploadPath))                {                    Directory.CreateDirectory(uploadPath);                }                var fileFullPath = Path.Combine(uploadPath, fileName);                try                {                    using var targetStream = System.IO.File.Create(fileFullPath);                    await section.Body.CopyToAsync(targetStream);                    serverFilePathList.Add("/upload/" + fileName);                }                catch (Exception e)                {                    Console.WriteLine(e);                }            }            section = await reader.ReadNextSectionAsync();        }        return Results<List>.DataResult(serverFilePathList);    }}

5.使用postman工具测试

6.查看本地上传文件

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