Question

我在不同的屏幕分辨率上得到了两个不同的屏幕截图结果，首先我尝试使用1920 * 1080（这是我的电脑默认分辨率）得到缩放不理想的结果后来我尝试更改我的电脑分辨率1280 * 720这次工作精细。这是我的示例代码：

    private void button1_Click(object sender, EventArgs e)
    {
        Bitmap bmp = new Bitmap(this.ClientRectangle.Width, this.ClientRectangle.Width);
        using (Graphics G = Graphics.FromImage(bmp))
        {
            G.CompositingMode = System.Drawing.Drawing2D.CompositingMode.SourceOver;
            G.CopyFromScreen(this.PointToScreen(new Point(0, 0)), new Point(0, 0), ClientSize);
            double percent = 0.60;
            Color darken = Color.FromArgb((int)(255 * percent), Color.Black);
            using (Brush brsh = new SolidBrush(darken))
            {
                G.FillRectangle(brsh, this.ClientRectangle);
            }
        }
        saveDialog.FileName = "test";
        saveDialog.DefaultExt = "jpg";
        saveDialog.Filter = "JPG images (*.jpg)|*.jpg";

        if (saveDialog.ShowDialog() == DialogResult.OK)
        {
            var fileName = saveDialog.FileName;
            if (!System.IO.Path.HasExtension(fileName) || System.IO.Path.GetExtension(fileName) != "jpg")
                fileName = fileName + ".jpg";

            bmp.Save(fileName, System.Drawing.Imaging.ImageFormat.Jpeg);
        }
    }

以1920 * 1080分辨率拍摄的图像：zoomed image

以1280 * 720分辨率拍摄的图像：Fine image

屏幕分辨率如何影响截屏？如何在我的电脑默认分辨率（1920 * 180）上获得所需的结果？请帮忙。感谢。

Answer 1

仅供参考，我得到的代码非常适合拍摄截图。但我没有仔细检查有多少功能。所以我只是分享我的代码作为答案，我希望它对你有用。有些dll需要你可以轻松添加。

CODE：

using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Runtime.InteropServices;
using System.Windows.Forms;

namespace myScreenCapture
{
    public enum CaptureMode
    {
        Screen, Window
    }

    public static class ScreenCapturer
    {
        [DllImport("user32.dll")]
        private static extern IntPtr GetForegroundWindow();

        [DllImport("user32.dll")]
        private static extern IntPtr GetWindowRect(IntPtr hWnd, ref Rect rect);

        [StructLayout(LayoutKind.Sequential)]
        private struct Rect
        {
            public int Left, Top, Right, Bottom;
        }

        [DllImport("user32.dll", CharSet = CharSet.Auto, ExactSpelling = true)]
        public static extern IntPtr GetDesktopWindow();

        public static void CaptureAndSave(string filename, string path, CaptureMode mode = CaptureMode.Window, ImageFormat format = null)
        {
            ImageSave(filename, format, Capture(mode), path);
        }

        public static void CaptureAndSave(string filename, IntPtr handle, string path, ImageFormat format = null)
        {
            ImageSave(filename, format, Capture(handle), path);
        }

        public static void CaptureAndSave(string filename, Control c, string path, ImageFormat format = null)
        {
            ImageSave(filename, format, Capture(c), path);
        }

        public static Bitmap Capture(CaptureMode mode = CaptureMode.Window)
        {
            return Capture(mode == CaptureMode.Screen ? GetDesktopWindow() : GetForegroundWindow());
        }


        public static Bitmap Capture(Control c)
        {
            return Capture(c.Handle);
        }

        public static Bitmap Capture(IntPtr handle)
        {
            Rectangle bounds;
            var rect = new Rect();
            GetWindowRect(handle, ref rect);
            bounds = new Rectangle(rect.Left, rect.Top, rect.Right - rect.Left, rect.Bottom - rect.Top);
            CursorPosition = new Point(Cursor.Position.X - rect.Left, Cursor.Position.Y - rect.Top);

            var result = new Bitmap(bounds.Width, bounds.Height);
            using (var g = Graphics.FromImage(result))
                g.CopyFromScreen(new Point(bounds.Left, bounds.Top), Point.Empty, bounds.Size);

            return result;
        }

        /// <summary> Position of the cursor relative to the start of the capture </summary>
        public static Point CursorPosition;

        static void ImageSave(string filename, ImageFormat format, Image image, string path)
        {
            format = format ?? ImageFormat.Png;
            if (!filename.Contains("."))
                filename = filename.Trim() + "." + format.ToString().ToLower();

            if (!filename.Contains(@"\"))
            {
                // filename = Path.Combine(Environment.GetEnvironmentVariable("TEMP") ?? @"C:\Temp", filename);
                filename = Path.Combine(path, filename);
            }

            filename = filename.Replace("%NOW%", DateTime.Now.ToString("yyyy-MM-dd@hh.mm.ss"));
            image.Save(filename, format);
        }
    }
}

使用类似：

ScreenCapturer.CaptureAndSave("ScreenShot_" + DateTime.Now.ToString("dd-MM-yyyy@TT@HH_mm_ss"), path, CaptureMode.Screen, System.Drawing.Imaging.ImageFormat.Jpeg);

捕获截图在不同分辨率C＃上无法正常工作

1 个答案: