小程序上传视频及预览(含后台)

上传视频，图片等都是调用wx.uploadFile，后台接口都不用改。
.wxml

  添加视频


  

.js

  Page({
  data: {
    src: ''
  },
  //选择视频
  chooseVideo: function() {
    var that = this
    wx.chooseVideo({
      success: function(res) {
        that.setData({
          src: res.tempFilePath,
        })
        that.uploadvideo();
      }
    })
  },
  uploadvideo: function() {
    var src = this.data.src;
    wx.uploadFile({
      url: '**************/Upload', //服务器接口
      filePath: src,
      header: {
        'content-type': 'multipart/form-data'
      },
      name: 'files',
      success: function(res) {
        console.log(res.data)
      },
      fail: function() {
        console.log('接口调用失败')
      }
    })
  }
})

后台接口

  [WebMethod(EnableSession = true)]
        public void Upload()
        {
            //获取文件路径
            HttpFileCollection files = HttpContext.Current.Request.Files;
            //返回的对象初始化
            object obj = null;
            //获取项目路径
            string sPath = System.Web.HttpContext.Current.Request.PhysicalPath;
            //得到上一级路径
            DirectoryInfo di = new DirectoryInfo(string.Format(@"{0}..\..\", sPath));
            string sFilePath = Path.Combine(di.FullName, "Upload", DateTime.Today.Year.ToString(), DateTime.Today.Month.ToString(), DateTime.Today.Day.ToString(), "");
            //不存在路径则创建该路径
            if (!Directory.Exists(sFilePath))
            {
                Directory.CreateDirectory(sFilePath);
            }
            foreach (string key in files.AllKeys)
            {
                HttpPostedFile file = files[key];//file.ContentLength文件长度
                if (string.IsNullOrEmpty(file.FileName) == false)
                {
                    string fileName = Path.GetFileName(file.FileName);// 原始文件名称
                    string fileExtension = Path.GetExtension(fileName); // 文件扩展名
                    string saveName = Guid.NewGuid().ToString() + fileExtension; // 保存文件名称
                    string fileSaveAsName = string.Format(@"{0}\{1}", sFilePath, saveName);//保存文件路径
                    file.SaveAs(fileSaveAsName);//保存
                    string sUrl = Path.Combine("Upload", DateTime.Today.Year.ToString(), DateTime.Today.Month.ToString(), DateTime.Today.Day.ToString(), saveName);//Url地址
                    obj = (new { resultCode = "001", FileName = saveName, Url ="http://localhost:14146/"+sUrl });
                }
                else obj = (new { resultCode = "003", Message = "请选择要上传的文件！" });
            }
            HttpContext.Current.Response.Write(obj);
        }

结果及返回数据