C# 通过Cef.CefSharp实现网页截图，并发送邮件

1、需求与目的

需实现效果为，将一个网页内容截图保存文件，最后通过邮件发送

2、界面实现

 

private void button1_Click(object sender, EventArgs e)
{
    var to = "";//接收人邮箱
    var bodyUrl = "";//需要截图的网页地址
    //图片保存路径
    string destPath = "C:\\Users\\lwk123456\\Desktop\\图片\\";
    //生成图片名称
    var subject = "截图生成图片" + DateTime.Today.ToString("yyyy-MM-dd");
    string imageName = $"{subject}.jpeg";
    string extName = Path.GetExtension(imageName).ToLower();
    WebScreenshot screenshot = new WebScreenshot();
    screenshot.createImg(bodyUrl, destPath, imageName, 895, 3800);
    //由于需要通过邮件发送所以这里将图片转base64，方便加载
    //或者也可直接转为网络路径
    var picByte = screenshot.PictureTurnByte(Path.Combine(destPath, imageName));
    var picByteStr = Convert.ToBase64String(picByte);
    //邮件发送内容主体
    var body = $"<img src='data:image/{extName};base64,{picByteStr}'  alt='{subject}' />";
    bool res = sendEmail.Send(to, "", subject, body, false);
    MessageBox.Show($"截图成功,图片路径:{Path.Combine(destPath, imageName)}");
}

 

 3、截图具体实现

   /// <summary>
    /// 网页截图帮助类
    /// </summary>
    public class WebScreenshot
    {
        /// <summary>
        /// 生成图片
        /// </summary>
        /// <param name="url"></param>
        /// <param name="destPath"></param>
        /// <param name="imageName"></param>
        /// <param name="width"></param>
        /// <param name="height"></param>
        public void createImg(string url, string destPath, string imageName, int width = 0, int height = 0)
        {
            AsyncContext.Run(async delegate
            {
                try
                {
                    if (!Directory.Exists(destPath))
                    {
                        Directory.CreateDirectory(destPath);
                    }
                    //加载CefSharp
                    var cefSharplog = Path.Combine(Environment.CurrentDirectory, "CefSharp\\Cache");
                    var settings = new CefSettings()
                    {
                        //默认情况下，CefSharp将使用内存缓存，您需要指定缓存文件夹来持久化数据
                        CachePath = cefSharplog
                    };
                    //执行依赖项检查以确保所有相关资源都在我们的输出目录中。
                    var success = await Cef.InitializeAsync(settings, performDependencyCheck: true, browserProcessHandler: null);
                    if (!success)
                    {
                        throw new Exception("无法初始化CEF，请检查日志文件.");
                    }
                    // 创建ChromiumWebBrowser实例
                    using (var browser = new ChromiumWebBrowser(url))
                    {
                        if (height > 0 && width > 0)
                        {
                            Size size = new Size(width, height);
                            browser.Size = size;
                        }
                        var initialLoadResponse = await browser.WaitForInitialLoadAsync();

                        if (!initialLoadResponse.Success)
                        {
                            throw new Exception($"页面加载失败，错误代码为:{initialLoadResponse.ErrorCode}, HttpStatusCode:{initialLoadResponse.HttpStatusCode}");
                        }
                        //等待浏览器渲染
                        await Task.Delay(500);
                        // 截屏
                        var bitmapAsByteArray = await browser.CaptureScreenshotAsync();
                        if (!Directory.Exists(destPath))
                        {
                            Directory.CreateDirectory(destPath);
                        }
                        // 要保存屏幕截图的文件路径
                        var screenshotPath = Path.Combine(destPath, imageName);
                        File.WriteAllBytes(screenshotPath, bitmapAsByteArray);
                    }
                    //关闭cef
                    if (!Cef.IsShutdown)
                    {
                        Cef.Shutdown();
                    }
                }
                catch (Exception e)
                {
                    //关闭cef
                    if (!Cef.IsShutdown)
                    {
                        Cef.Shutdown();
                    }
                }
            });
        }
        //图片转base64
        public byte[] PictureTurnByte(string url)
        {
            //图片转二进制流
            FileStream stream = new FileStream(url, FileMode.OpenOrCreate, FileAccess.ReadWrite);
            BinaryReader binaryReader = new BinaryReader(stream);
            binaryReader.BaseStream.Seek(0, SeekOrigin.Begin);
            byte[] bytes = binaryReader.ReadBytes(Convert.ToInt32(stream.Length.ToString()));
            binaryReader.Close();
            return bytes;
        }
    }

 

 4、发送邮件帮助类

/// <summary>
/// 发送邮件帮助类
/// </summary>
public class sendEmail
{
    /// <summary>
    /// 发送邮件
    /// </summary>
    /// <param name="tos">收件人</param>
    /// <param name="cc">抄送人</param>
    /// <param name="subject">标题</param>
    /// <param name="body">内容</param>
    /// <returns></returns>
    public static bool Send(string tos, string cc, string subject, string body, bool isEnableSsl = false)
    {
        try
        {
            System.Configuration.AppSettingsReader appSetting = new System.Configuration.AppSettingsReader();
            ///smtp服务器
            string mailDomain = "smtp.exmail.qq.com";
            //发送端口
            int mailPort = 25;
            //发件人账号
            string mailFrom = "";
            //密码
            string mailPassword ="";
            MailMessage message = new MailMessage()
            {
                SubjectEncoding = Encoding.UTF8,
                BodyEncoding = Encoding.UTF8,
                //设置发件人地址姓名 
                From = new MailAddress(mailFrom, mailFrom, Encoding.UTF8),
            };
            //收件人
            string[] mailToList = tos.Split(';');
            List<string> mailList = new List<string>();
            for (int i = 0; i < mailToList.Length; i++)
            {
                if (mailToList[i].Length > 0)
                {
                    message.To.Add(new MailAddress(mailToList[i], mailToList[i], Encoding.UTF8));
                }
             }
            //抄送人
            if (!string.IsNullOrEmpty(cc))
            {
                string[] mailToCCList = cc.Split(';');
                for (int i = 0; i < mailToCCList.Length; i++)
                {
                    if (mailToCCList[i].Length > 0)
                    {
                    message.CC.Add(new MailAddress(mailToCCList[i], mailToCCList[i], Encoding.UTF8));
                    }
                }
            }
            message.IsBodyHtml = true;//邮件内容是否为html
            message.Subject = subject;
            message.Priority = MailPriority.High;
            message.Body = body;
            SmtpClient smtp = new SmtpClient(mailDomain, mailPort)
            {
                Timeout = 60000,
                UseDefaultCredentials = true,
                EnableSsl = isEnableSsl,
                //设置发件人用户密码
                Credentials = new System.Net.NetworkCredential(mailFrom, mailPassword),
                DeliveryMethod = SmtpDeliveryMethod.Network
            };
            smtp.Send(message);
            return true;
            }
        catch (Exception ex)
        {
            return false;
            throw ex;
        }
    }}

 

5、具体效果