我正在努力获取一个基本的文件上传示例,以使用.NET Core 2.1进行工作。我的技术基于此.NET Core file upload article,使用了该文章顶部的简单“小文件”示例。
当我调用文件上传时,没有任何文件发布到Upload方法...
有人可以看到这里缺少的东西吗?看起来很简单,但是却行不通。
这是重现我当前状态所需的最少代码。
我做了“文件/新项目/ASP.NET Core Web应用程序”,并使用了该项目模板...
我删除了样板UI,并使用简化的项目结构创建了自己的版本...
Index.cshtml
<!DOCTYPE html>
<html>
<body>
<input type="file" />
<script src="~/lib/jquery/dist/jquery.js"></script>
<script type="text/javascript">
$(function () {
$('input[type="file"]').change(function (e) {
let formData = new FormData();
for (let x = 0; x < this.files.length; x++) {
let file = this.files[x];
formData.append(file.name, file);
}
$.ajax({
type: 'POST',
url: './Home/Upload',
contentType: false,
processData: false,
data: formData,
success: function (message) {
}
});
});
});
</script>
</body>
</html>
HomeController.cs
using System.Collections.Generic;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
namespace FileUploadIssue.Controllers
{
public class HomeController : Controller
{
public IActionResult Index()
{
return View();
}
public IActionResult Upload (List<IFormFile> files)
{
return Ok();
}
}
}
Program.cs(与项目模板相同)
using Microsoft.AspNetCore;
using Microsoft.AspNetCore.Hosting;
namespace FileUploadIssue
{
public class Program
{
public static void Main(string[] args)
{
CreateWebHostBuilder(args).Build().Run();
}
public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
WebHost.CreateDefaultBuilder(args)
.UseStartup<Startup>();
}
}
Startup.cs(与项目模板相同)
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
namespace FileUploadIssue
{
public class Startup
{
public Startup(IConfiguration configuration)
{
Configuration = configuration;
}
public IConfiguration Configuration { get; }
public void ConfigureServices(IServiceCollection services)
{
services.Configure<CookiePolicyOptions>(options =>
{
options.CheckConsentNeeded = context => true;
options.MinimumSameSitePolicy = SameSiteMode.None;
});
services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_1);
}
public void Configure(IApplicationBuilder app, IHostingEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
else
{
app.UseExceptionHandler("/Home/Error");
app.UseHsts();
}
app.UseHttpsRedirection();
app.UseStaticFiles();
app.UseCookiePolicy();
app.UseMvc(routes =>
{
routes.MapRoute(
name: "default",
template: "{controller=Home}/{action=Index}/{id?}");
});
}
}
}
appsettings.json(与项目模板相同)
{
"Logging": {
"LogLevel": {
"Default": "Warning"
}
},
"AllowedHosts": "*"
}
答案 0 :(得分:3)
感谢您关注我的教程:)
问题出在您的jQuery,特别是这段代码:
for (let x = 0; x < this.files.length; x++) {
let file = this.files[x];
formData.append(file.name, file);
}
append方法的第一个参数实际上是“表单输入”名称的名称,而不是文件名(当您将文件附加到文件名时,它将自动附加到请求中)。
如果您将代码更改为:
for (let x = 0; x < this.files.length; x++) {
let file = this.files[x];
formData.append('files', file);
}
你们都很高兴。
答案 1 :(得分:0)
如果要启用上传多个文件,请将<input type="file" />
更改为以下内容:
<input type="file" multiple />