上传文件-layui+ashx

 public void ProcessRequest (HttpContext context) {

        if (true) {

            context.Response.ContentType = "text/plain";

            result result = new result();

            string fileNewName  = string.Empty;

            string filePath = string.Empty;

            HttpFileCollection files = context.Request.Files;

            if (files.Count > )

            {

                //设置文件名

                fileNewName = DateTime.Now.ToString("yyyyMMddHHmmssff") + "_" + System.IO.Path.GetFileName(files[].FileName);

                //保存文件

                files[].SaveAs(context.Server.MapPath("../Files/" + fileNewName));

                result.code = "";

                result.msg = "文件上传成功！";

            }

            else {

                result.code = "";

                result.msg = "文件上传失败！";

            }

            context.Response.Write(new JavaScriptSerializer().Serialize(result));

            context.Response.End();

        }

    }

    public class result{

        public string code { get; set; }

        public string msg { get; set; }

    }

 //创建上传组件

        upload.render({

            elem: '#uploadBtn',

            url: './FileOption.ashx',

            dataType:"json",

            accept: 'file', //允许上传的文件类型

            size: , //最大允许上传的文件大小,

            data: function () {

                //请求上传接口的额外参数

            },

            done: function (res) {

                if (res.code === "") {

                    layer.msg(res.msg);

                } else {

                    layer.msg(res.msg);

                }

            },

            error: function () {

                layer.msg("请求异常！");

            }

        });