将屏幕捕捉到位图中

我想在我的代码中捕捉屏幕，使用键盘上的“打印屏幕”按钮获得类似图像的效果。

有人知道怎么做吗? 我没有出发点。

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小开
最佳答案

如果使用.NET 2.0(或更高版本)框架，你可以使用这里详细介绍的 CopyFromScreen()方法:

Http://www.geekpedia.com/tutorial181_capturing-screenshots-using-csharp.html

//Create a new bitmap.
var bmpScreenshot = new Bitmap(Screen.PrimaryScreen.Bounds.Width,
Screen.PrimaryScreen.Bounds.Height,
PixelFormat.Format32bppArgb);


// Create a graphics object from the bitmap.
var gfxScreenshot = Graphics.FromImage(bmpScreenshot);


// Take the screenshot from the upper left corner to the right bottom corner.
gfxScreenshot.CopyFromScreen(Screen.PrimaryScreen.Bounds.X,
Screen.PrimaryScreen.Bounds.Y,
0,
0,
Screen.PrimaryScreen.Bounds.Size,
CopyPixelOperation.SourceCopy);


// Save the screenshot to the specified path that the user has chosen.
bmpScreenshot.Save("Screenshot.png", ImageFormat.Png);
小开 
// Use this version to capture the full extended desktop (i.e. multiple screens)


Bitmap screenshot = new Bitmap(SystemInformation.VirtualScreen.Width,
SystemInformation.VirtualScreen.Height,
PixelFormat.Format32bppArgb);
Graphics screenGraph = Graphics.FromImage(screenshot);
screenGraph.CopyFromScreen(SystemInformation.VirtualScreen.X,
SystemInformation.VirtualScreen.Y,
0,
0,
SystemInformation.VirtualScreen.Size,
CopyPixelOperation.SourceCopy);


screenshot.Save("Screenshot.png", System.Drawing.Imaging.ImageFormat.Png);
小开

试试 这个码

Bitmap bmp = new Bitmap(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height);
Graphics gr = Graphics.FromImage(bmp);
gr.CopyFromScreen(0, 0, 0, 0, bmp.Size);
pictureBox1.Image = bmp;
bmp.Save("img.png",System.Drawing.Imaging.ImageFormat.Png);
小开 
Bitmap memoryImage;
//Set full width, height for image
memoryImage = new Bitmap(Screen.PrimaryScreen.Bounds.Width,
Screen.PrimaryScreen.Bounds.Height,
PixelFormat.Format32bppArgb);
Size s = new Size(memoryImage.Width, memoryImage.Height);
Graphics memoryGraphics = Graphics.FromImage(memoryImage);
memoryGraphics.CopyFromScreen(0, 0, 0, 0, s);
string str = "";
try
{
str = string.Format(Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments) +
@"\Screenshot.png");//Set folder to save image
}
catch { };
memoryImage.save(str);
小开

对于被接受的答案，我有两个问题。

  1. 它不能捕获多显示器设置中的所有屏幕。
  2. 当使用显示缩放并且应用程序未声明为 DpiAware时，Screen类返回的宽度和高度是不正确的。

下面是我的更新解决方案，它使用 Screen.AllScreens静态属性，并使用 p/call 调用 EnumDisplaySettings以获得真正的屏幕分辨率。

using System.Drawing;
using System.Linq;
using System.Runtime.InteropServices;
using System.Windows.Forms;


class Program
{
const int ENUM_CURRENT_SETTINGS = -1;


static void Main()
{
foreach (Screen screen in Screen.AllScreens)
{
DEVMODE dm = new DEVMODE();
dm.dmSize = (short)Marshal.SizeOf(typeof(DEVMODE));
EnumDisplaySettings(screen.DeviceName, ENUM_CURRENT_SETTINGS, ref dm);


using (Bitmap bmp = new Bitmap(dm.dmPelsWidth, dm.dmPelsHeight))
using (Graphics g = Graphics.FromImage(bmp))
{
g.CopyFromScreen(dm.dmPositionX, dm.dmPositionY, 0, 0, bmp.Size);
bmp.Save(screen.DeviceName.Split('\\').Last() + ".png");
}
}
}


[DllImport("user32.dll")]
public static extern bool EnumDisplaySettings(string lpszDeviceName, int iModeNum, ref DEVMODE lpDevMode);


[StructLayout(LayoutKind.Sequential)]
public struct DEVMODE
{
private const int CCHDEVICENAME = 0x20;
private const int CCHFORMNAME = 0x20;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 0x20)]
public string dmDeviceName;
public short dmSpecVersion;
public short dmDriverVersion;
public short dmSize;
public short dmDriverExtra;
public int dmFields;
public int dmPositionX;
public int dmPositionY;
public ScreenOrientation dmDisplayOrientation;
public int dmDisplayFixedOutput;
public short dmColor;
public short dmDuplex;
public short dmYResolution;
public short dmTTOption;
public short dmCollate;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 0x20)]
public string dmFormName;
public short dmLogPixels;
public int dmBitsPerPel;
public int dmPelsWidth;
public int dmPelsHeight;
public int dmDisplayFlags;
public int dmDisplayFrequency;
public int dmICMMethod;
public int dmICMIntent;
public int dmMediaType;
public int dmDitherType;
public int dmReserved1;
public int dmReserved2;
public int dmPanningWidth;
public int dmPanningHeight;
}
}

参考文献:

Https://stackoverflow.com/a/36864741/987968 Http://pinvoke.net/default.aspx/user32/enumdisplaysettings.html?diff=y

小开

我一直想知道如何在 FORTRAN 做同样的事情，以节省我一大堆手动干预使用打印屏幕，粘贴到油漆等。 我只是弄明白了如何: 我使用 GETPIXEL _ RGB 读取屏幕上任何我想要的部分的像素，并且，准备了一个。Bmp 头并将其写入。Bmp 文件，然后写入像素数据。然而，我不认为它会捕获10到20英尺


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