asp.net core mvc实现文件上传实例

工作用到文件上传的功能，在这个分享下 ~~

controller:        

public class picturecontroller : controller
  {
    private ihostingenvironment hostingenv;

    public picturecontroller(ihostingenvironment env)
    {
      this.hostingenv = env;
    }
    // get: /<controller>/
    public iactionresult index()
    {
      return view();
    }
    public iactionresult uploadfiles()
    {
      return view();
    }
    [httppost]
    public iactionresult uploadfiles(ilist<iformfile> files)
    {
      long size = 0;
      foreach (var file in files)
      {
        var filename = contentdispositionheadervalue
                .parse(file.contentdisposition)
                .filename
                .trim('"');
        //这个hostingenv.webrootpath就是要存的地址可以改下
        filename = hostingenv.webrootpath + $@"\{filename}";
        size += file.length;
        using (filestream fs = system.io.file.create(filename))
        {
          file.copyto(fs);
          fs.flush();
        }
      }
      viewbag.message = $"{files.count} file(s) /{ size}bytes uploaded successfully!";
       return view();
    }

  }

view:

<form asp-action="uploadfiles"
         asp-controller="picture"
         method="post"
         enctype="multipart/form-data">
        <input type="file" name="files" multiple />
        <input type="submit" value="upload selected files" />
 </form>

文件是上传到wwwroot目录文件下的，这我也看不太懂还在学习，欢迎大家交流~~

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下面是jquery ajax方式上传的

post方式的action的z参数没用 因为只有一个post方式的会404错误所以又加了一个get的action

controller: 

    public iactionresult uploadfilesajax()
    {
      return view();
    }
    [httppost]
    public iactionresult uploadfilesajax(string z) 
    {
      long size = 0;
      var files = request.form.files;
      foreach (var file in files)
      {
        var filename = contentdispositionheadervalue
                .parse(file.contentdisposition)
                .filename
                .trim('"');
        filename = @"c:\users\lg.hl\desktop" + $@"\{filename}";    
        size += file.length;
        using (filestream fs = system.io.file.create(filename))
        {
          file.copyto(fs);
          fs.flush();
        }
      }
      string message = $"{files.count} file(s) / { size}bytes uploaded successfully!";
        return json(message);
    }

view

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

jquery

<script type="text/javascript">
    $(document).ready(function () {
      $("#upload").click(function (evt) {
        var fileupload = $("#files").get(0);
        var files = fileupload.files;
        var data = new formdata();
        for (var i = 0; i < files.length ; i++) {
          data.append(files[i].name, files[i]);
        }
        $.ajax({
          type: "post",
          url: "/picture/uploadfilesajax",
          contenttype: false,
          processdata: false,
          data: data,
          success: function (message) {
            alert(message);
          },
          error: function () {
            alert("there was error uploading files!");
          }
        });
      });
    });
</script>

欢迎大家交流~ 以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。