@using BookStore
@using Microsoft.Framework.OptionsModel
@addTagHelper "*, Microsoft.AspNet.Mvc.TagHelpers"

var connection1 = Request.HttpContext.GetFeature<IHttpConnectionFeature>();
var connection2 = Context.GetFeature<IHttpConnectionFeature>();

var isLocal = connection1.IsLocal;         //是否本地IP 
var localIpAddress = connection1.LocalIpAddress;  //本地IP地址
var localPort = connection1.LocalPort;       //本地IP端口
var remoteIpAddress = connection1.RemoteIpAddress; //远程IP地址
var remotePort = connection1.RemotePort;      //本地IP端口

<form method="post" enctype="multipart/form-data">
  <input type="file" name="files" id="files" multiple />
<input type="submit" value="submit" />
</form>

[HttpPost]
public async Task<IActionResult> Index(IList<IFormFile> files)
{
  foreach (var file in files)
  {
    var fileName = ContentDispositionHeaderValue
      .Parse(file.ContentDisposition)
      .FileName
      .Trim('"');// beta3版本的bug，FileName返回的字符串包含双引号，如"fileName.ext"
    if (fileName.EndsWith(".txt"))// 只保存txt文件
    {
      var filePath = _hostingEnvironment.ApplicationBasePath + "\\wwwroot\\"+ fileName;
      await file.SaveAsAsync(filePath);
    }
  }
  return RedirectToAction("Index");// PRG
}