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.net core2.2上传文件总结
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总结一下.net core的上传文件操作,这里主要分上传到本地的也就是MVC的,另一种是上传到WebAPi的.
一、Web端
1.新建一个.net core mvc项目
2.这里的版本是.net core 2.2.4
3.新建一个控制器 TestController
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net.Http.Headers;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Mvc;namespace Web.Controllers
{
public class TestController : Controller
{
private readonly IHostingEnvironment _hostingEnvironment;
public TestController(IHostingEnvironment hostingEnvironment)
{
_hostingEnvironment = hostingEnvironment;
}
public IActionResult Index()
{
return View();
} /// <summary>
/// 上传图片
/// </summary>
/// <returns></returns>
[HttpPost]
public string UploadFiles(string z)
{
long size = ;
var path = "";
var files = Request.Form.Files;
foreach (var file in files)
{
var filename = ContentDispositionHeaderValue
.Parse(file.ContentDisposition)
.FileName
.Trim('"');
string fileExt = Path.GetExtension(file.FileName); //文件扩展名
long fileSize = file.Length; //获得文件大小，以字节为单位
string newFileName = System.Guid.NewGuid().ToString() + fileExt; //随机生成新的文件名
path = "/upload/" + newFileName;
path = _hostingEnvironment.WebRootPath + $@"\{path}";
size += file.Length;
using (FileStream fs = System.IO.File.Create(path))
{
file.CopyTo(fs);
fs.Flush();
}
path = "/upload/" + newFileName;
}
return path;
} }
}
4.新建页面Index
@{
Layout = null;
}<!DOCTYPE html><html>
<head>
<meta name="viewport" content="width=device-width" />
<title>Index</title>
</head>
<body>
<form id="form0">
<input type="file" name="file" />
<input type="button" value="上传本地" onclick="upload()" />
</form>
</body>
</html>
<script src="~/lib/jquery/dist/jquery.js"></script>
<script src="~/js/jquery.form.js"></script>
<script>
function upload() {
var formData = new FormData($("#form0")[]);
$.ajax({
url: "/test/UploadFiles",
data: formData,
contentType: false,
processData: false,
cache: false,
type: 'post',
success: function (d) {
console.log(d);
}
})
}</script>
5.注意:默认所有的静态文件都放在wwwroot 所以这里我在wwwroot下创建了文件夹upload从来存储文件
这样Web端的上传文件就搞定了
二、WebApi端
1.新建一个webapi项目
2.新建一个api控制器 TestApiController
using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Cors;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Newtonsoft.Json;namespace WebApi.Controllers
{
[EnableCors("AllowSameDomain")]//跨域
[Route("api/[controller]/[action]")]
[ApiController]
public class TestApiController : ControllerBase
{
private readonly IHostingEnvironment _hostingEnvironment; public TestApiController(IHostingEnvironment hostingEnvironment)
{
_hostingEnvironment = hostingEnvironment;
} [HttpPost]
public ResultObject UploadIForm(List<IFormFile> files)
{
List<String> filenames = new List<string>(); foreach (var file in files)
{
var fileName = file.FileName;
Console.WriteLine(fileName); fileName = $"/UploadFile/{fileName}";
filenames.Add(fileName); fileName = _hostingEnvironment.WebRootPath + fileName; using (FileStream fs = System.IO.File.Create(fileName))
{
file.CopyTo(fs);
fs.Flush();
}
} return new ResultObject
{
state = "Success",
resultObject = filenames
};
}
[HttpPost]
public string Upload(IFormCollection Files)
{ try
{
//var form = Request.Form;//直接从表单里面获取文件名不需要参数
string dd = Files["File"];
var form = Files;//定义接收类型的参数
Hashtable hash = new Hashtable();
IFormFileCollection cols = Request.Form.Files;
if (cols == null || cols.Count == )
{
return JsonConvert.SerializeObject(new { status = -, message = "没有上传文件", data = hash });
}
foreach (IFormFile file in cols)
{
//定义图片数组后缀格式
string[] LimitPictureType = { ".JPG", ".JPEG", ".GIF", ".PNG", ".BMP" };
//获取图片后缀是否存在数组中
string currentPictureExtension = Path.GetExtension(file.FileName).ToUpper();
if (LimitPictureType.Contains(currentPictureExtension))
{ //为了查看图片就不在重新生成文件名称了
// var new_path = DateTime.Now.ToString("yyyyMMdd")+ file.FileName;
var new_path = Path.Combine("uploads/images/", file.FileName);
var path = Path.Combine(Directory.GetCurrentDirectory(), "wwwroot", new_path); using (var stream = new FileStream(path, FileMode.Create))
{ //图片路径保存到数据库里面去
bool flage = true;
if (flage == true)
{
//再把文件保存的文件夹中
file.CopyTo(stream);
hash.Add("file", "/" + new_path);
}
}
}
else
{
return JsonConvert.SerializeObject(new { status = -, message = "请上传指定格式的图片", data = hash });
}
} return JsonConvert.SerializeObject(new { status = , message = "上传成功", data = hash });
}
catch (Exception ex)
{ return JsonConvert.SerializeObject(new { status = -, message = "上传失败", data = ex.Message });
} } }
public class ResultObject
{
public String state { get; set; }
public Object resultObject { get; set; }
}}
3.这里前台页面还是通过ajax来请求api的,所以就需要进行跨域
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Options;namespace WebApi
{
public class Startup
{
public Startup(IConfiguration configuration)
{
Configuration = configuration;
} public IConfiguration Configuration { get; } // This method gets called by the runtime. Use this method to add services to the container.
public void ConfigureServices(IServiceCollection services)
{
//允许一个或多个具体来源:
services.AddCors(options =>
{
// Policy 名稱 CorsPolicy 是自訂的，可以自己改
//跨域规则的名称
options.AddPolicy("AllowSameDomain", policy =>
{
// 設定允許跨域的來源，有多個的話可以用 `,` 隔開
policy
.WithOrigins("http://127.0.0.1:53189", "http://localhost:53189")
//.AllowAnyOrigin()//允许所有来源的主机访问
.AllowAnyMethod()
.AllowAnyHeader()
.AllowCredentials();//指定处理cookie
});
}); services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_2);
} // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
public void Configure(IApplicationBuilder app, IHostingEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
app.UseCors("AllowSameDomain");//必须位于UserMvc之前
app.UseMvc();
}
}
}
4.前台页面 还是用这个方法,url改下
function upload1() {
var formData = new FormData($("#form0")[]);
$.ajax({
url: "http://127.0.0.1:8067/api/testapi/Upload",
data: formData,
contentType: false,
processData: false,
cache: false,
type: 'post',
success: function (d) {
console.log(d); }
})
}
5.将webapi发布到iis
6.同样的,静态文件还是在wwwroot下,api发布后是没有wwwroot文件夹的,所以直接建 /wwwroot/upload文件夹
这样上传就搞定了
