c# - CopyFromScreen 是获取屏幕截图的正确方法吗？

Question

我正在创建一个在特定时间间隔截取桌面屏幕截图的应用。

代码:

String nme = "";
Bitmap printscreen = new Bitmap(Screen.PrimaryScreen.Bounds.Width, 
                                Screen.PrimaryScreen.Bounds.Height);
Graphics graphics = Graphics.FromImage(printscreen as Image);
graphics.CopyFromScreen(0, 0, 0, 0, printscreen.Size);
nme = DateTime.Now.ToString();
printscreen.Save(@"F:\Temp\printScre.jpg", ImageFormat.Jpeg);

1. CopyFromScreen 是获取桌面屏幕截图的正确方法吗？
2. 如果我想将此屏幕截图发送到远程服务器，那么最好的方法是什么？
3. 我应该在发送之前做一些压缩吗？如果是的话，最有效的方法是什么？

Answer 1

1. 是的，这是正确的方式
2. 有几种可能性。我建议通过电子邮件或 FTP 发送它(因为它在 C# 中很简单)。
3. 不，我个人认为您不需要额外的压缩。您的屏幕截图已保存为 JPEG，因此它们已被压缩。

用于发送带附件的电子邮件的代码段:

MailMessage mail = new MailMessage();
SmtpClient SmtpServer = new SmtpClient(YOUR SMTP SERVER ADDRESS);
mail.From = new MailAddress(SENDER ADDRESS);
mail.To.Add(RECEIVER ADDRESS);
mail.Subject = "Test Mail - 1";
mail.Body = "mail with attachment";
System.Net.Mail.Attachment attachment;
attachment = new System.Net.Mail.Attachment("YOURFILE");
mail.Attachments.Add(attachment);
SmtpServer.Port = 587;
SmtpServer.Credentials = new System.Net.NetworkCredential(YOUR_SMTP_USER_NAME, YOUR_SMTP_PASSWORD);
SmtpServer.EnableSsl = true;
SmtpServer.Send(mail); 

(基于 this 博客)

FTP 的代码片段:

    FtpWebRequest request = (FtpWebRequest)WebRequest.Create("ftp://www.contoso.com/test.htm");
    request.Method = WebRequestMethods.Ftp.UploadFile;
    request.Credentials = new NetworkCredential ("anonymous","janeDoe@contoso.com");
    StreamReader sourceStream = new StreamReader("testfile.txt");
    byte [] fileContents = Encoding.UTF8.GetBytes(sourceStream.ReadToEnd());
    sourceStream.Close();
    request.ContentLength = fileContents.Length;
    Stream requestStream = request.GetRequestStream();
    requestStream.Write(fileContents, 0, fileContents.Length);
    requestStream.Close();
    FtpWebResponse response = (FtpWebResponse)request.GetResponse();    
    Console.WriteLine("Upload File Complete, status {0}", response.StatusDescription);    
    response.Close();

(基于 MSDN )