html和winform webBrowser控件交互并播放视频（包含转码）

1、 为了使网页能够与winform交互 将com的可访问性设置为真
   

[System.Security.Permissions.PermissionSet(System.Security.Permissions.SecurityAction.Demand, Name = "FullTrust")]
    [System.Runtime.InteropServices.ComVisibleAttribute(true)]

2、在webBrowser控件中设置可被html页面调用的类即：webBrowser1.ObjectForScripting = this;前端即可通过window.external访问this对象

3、html页面调用后台方法：window.external.方法名(); 此处的window.external相当于webBrowser1.ObjectForScripting

设计：

 后台代码：

注意：视频地址需要修改

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Linq;
using System.Threading.Tasks;
using System.Windows.Forms;
using DevExpress.XtraEditors;
using WebKit;
using System.IO;
using DXApplication1.Helper;

namespace DXApplication1
{
    //为了使网页能够与winform交互 将com的可访问性设置为真
    [System.Security.Permissions.PermissionSet(System.Security.Permissions.SecurityAction.Demand, Name = "FullTrust")]
    [System.Runtime.InteropServices.ComVisibleAttribute(true)]
    public partial class webBrowser : DevExpress.XtraEditors.XtraForm
    {
        public webBrowser()
        {
            InitializeComponent();
           
        }

        private void webBrowser_Load(object sender, EventArgs e)
        {
            webBrowser1.ScriptErrorsSuppressed = true;//消除脚本错误 
            webBrowser1.Navigate(@"C:\source\repos\DXApplication1\DXApplication1\Html\HTMLPage2.html");
            webBrowser1.ObjectForScripting = this;
            
        }
        
        public string FileLode(string url)
        {
            //返回路径
            string result = url;
            if (!string.IsNullOrEmpty(url))
            {
                //保存文件名称
                string saveName = Guid.NewGuid().ToString() + ".mp4"; 
                string basePath = "UploadFile";
                string saveDir = DateTime.Now.ToString("yyyy-MM-dd");
                //获取应用程序的当前工作目录
                string MapPath = Directory.GetCurrentDirectory();
                // 文件上传后的保存路径
                string serverDir = Path.Combine(MapPath, basePath, saveDir);
                //保存文件完整路径
                string fileNme = Path.Combine(serverDir, saveName);
                //项目中是否存在文件夹，不存在创建