尝试基于计时器的屏幕截图 [英] trying for screen shots based on timer

问题描述

尝试基于计时器的屏幕截图如何实现请告诉我，我尝试了一些其他方法。就像我试图将屏幕截图保存到我得到它的文件夹

当我试图拍摄屏幕截图时我没有得到请帮帮我。

trying for screen shots based on the timer how to implement please tell me i tried some other methods . like i tried to save the screen shots to the folder i got it
when i am trying for to take screen shots i am not getting please help me out.

推荐答案

使用System;

使用System.Collections.Generic;

使用System.Text;

使用System.Runtime .InteropServices;

使用System.Drawing;

使用System.Drawing.Imaging;



namespace Hookclass < br $>
{



公共类ScreenCapture

{



public Image CaptureScreen（）

{

返回CaptureWindow（User32.GetDesktopWindow（））;

}



public Image CaptureWindow（IntPtr句柄）

{

//获取目标窗口的hDC

IntPtr hdcSrc = User32.GetWindowDC（句柄）;

//获取大小

User32.RECT windowRect = new User32.RECT（）;

User32.GetWindowRect（handle，ref windowRect）;

int width = windowRect.right - windowRect。 left;

int height = windowRect.bottom - windowRect.top;

//创建我们可以复制到的设备上下文

IntPtr hdcDest = GDI32.CreateCompatibleDC（hdcSrc）;

//创建一个我们可以复制到的位图，

//使用GetDeviceCaps获取宽度/高度

IntPtr hBitmap = GDI32.CreateCompatibleBitmap（hdcSrc，width，height）;

//选择位图对象



IntPtr hOld = GDI32 .SelectObject（hdcDest，hBitmap）;

// bitblt over

GDI32.BitBlt（hdcDest，0,0，width，height，hdcSrc，0,0，GDI32。 SRCCOPY）;

//恢复选择

GDI32.SelectObject（hdcDest ，hOld）;

//清理

GDI32.DeleteDC（hdcDest）;

User32.ReleaseDC（handle，hdcSrc）;

//为它获取一个.NET图像对象

图像img = Image.FromHbitmap（hBitmap）;

//释放Bitmap对象

GDI32.DeleteObject（hBitmap）;

返回img;

}



public void CaptureWindowToFile（IntPtr handle，string filename，ImageFormat format）

{



Image img = CaptureWindow（handle）;



img.Save（文件名，格式）;

}



public void CaptureScreenToFile（ string filename，ImageFormat格式）

{

Image img = CaptureScreen（）;

img.Save（filename，format）;



}





私人班级GDI32

{



public const int SRCCOPY = 0x00CC0020; // BitBlt dwRop参数

[DllImport（gdi32.dll）]

public static extern bool BitBlt（IntPtr hObject，int nXDest，int nYDest，

int nWidth，int nHeight，IntPtr hObjectSource，

[DllImport（gdi32.dll）]

public static extern IntPtr CreateCompatibleBitmap（IntPtr hDC，int nWidth，

int nHeight）;

[DllImport（gdi32.dll）]

public static extern IntPtr CreateCompatibleDC（IntPtr hDC）;

[DllImport（gdi32.dll）]

public static extern bool DeleteDC（IntPtr hDC）;

[DllImport（gdi32.dll）]

public static extern bool DeleteObject（IntPtr hObject）;

[DllImport（ gdi32.dll）]

public static extern IntPtr SelectObject（IntPtr hDC，IntPtr hObject）;

}



私人班级用户32

{

[StructLayout （LayoutKind.Sequential）]

public struct RECT

{

public int left;

public int top;

public int right;

public int bottom;

}

[DllImport（user32.dll） ]

public static extern IntPtr GetDesktopWindow（）;

[DllImport（user32.dll）]

public static extern IntPtr GetWindowDC（IntPtr hWnd）;

[DllImport（user32.dll）]

public static extern IntPtr ReleaseDC（IntPtr hWnd，IntPtr hDC）;

[DllImport（user32.dll）]

public static extern IntPtr GetWindowRect（IntPtr hWnd，ref RECT rect）;

}

}

}

using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;
using System.Drawing;
using System.Drawing.Imaging;

namespace Hookclass
{

public class ScreenCapture
{

public Image CaptureScreen()
{
return CaptureWindow(User32.GetDesktopWindow());
}

public Image CaptureWindow(IntPtr handle)
{
// get te hDC of the target window
IntPtr hdcSrc = User32.GetWindowDC(handle);
// get the size
User32.RECT windowRect = new User32.RECT();
User32.GetWindowRect(handle, ref windowRect);
int width = windowRect.right - windowRect.left;
int height = windowRect.bottom - windowRect.top;
// create a device context we can copy to
IntPtr hdcDest = GDI32.CreateCompatibleDC(hdcSrc);
// create a bitmap we can copy it to,
// using GetDeviceCaps to get the width/height
IntPtr hBitmap = GDI32.CreateCompatibleBitmap(hdcSrc, width, height);
// select the bitmap object

IntPtr hOld = GDI32.SelectObject(hdcDest, hBitmap);
// bitblt over
GDI32.BitBlt(hdcDest, 0, 0, width, height, hdcSrc, 0, 0, GDI32.SRCCOPY);
// restore selection
GDI32.SelectObject(hdcDest, hOld);
// clean up
GDI32.DeleteDC(hdcDest);
User32.ReleaseDC(handle, hdcSrc);
// get a .NET image object for it
Image img = Image.FromHbitmap(hBitmap);
// free up the Bitmap object
GDI32.DeleteObject(hBitmap);
return img;
}

public void CaptureWindowToFile(IntPtr handle, string filename, ImageFormat format)
{

Image img = CaptureWindow(handle);

img.Save(filename, format);
}

public void CaptureScreenToFile(string filename, ImageFormat format)
{
Image img = CaptureScreen();
img.Save(filename, format);

}


private class GDI32
{

public const int SRCCOPY = 0x00CC0020; // BitBlt dwRop parameter
[DllImport("gdi32.dll")]
public static extern bool BitBlt(IntPtr hObject, int nXDest, int nYDest,
int nWidth, int nHeight, IntPtr hObjectSource,
int nXSrc, int nYSrc, int dwRop);
[DllImport("gdi32.dll")]
public static extern IntPtr CreateCompatibleBitmap(IntPtr hDC, int nWidth,
int nHeight);
[DllImport("gdi32.dll")]
public static extern IntPtr CreateCompatibleDC(IntPtr hDC);
[DllImport("gdi32.dll")]
public static extern bool DeleteDC(IntPtr hDC);
[DllImport("gdi32.dll")]
public static extern bool DeleteObject(IntPtr hObject);
[DllImport("gdi32.dll")]
public static extern IntPtr SelectObject(IntPtr hDC, IntPtr hObject);
}

private class User32
{
[StructLayout(LayoutKind.Sequential)]
public struct RECT
{
public int left;
public int top;
public int right;
public int bottom;
}
[DllImport("user32.dll")]
public static extern IntPtr GetDesktopWindow();
[DllImport("user32.dll")]
public static extern IntPtr GetWindowDC(IntPtr hWnd);
[DllImport("user32.dll")]
public static extern IntPtr ReleaseDC(IntPtr hWnd, IntPtr hDC);
[DllImport("user32.dll")]
public static extern IntPtr GetWindowRect(IntPtr hWnd, ref RECT rect);
}
}
}

using System;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Drawing.Imaging;
using System.IO;
using System.Drawing;
using System.Windows.Forms;

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        Bitmap bitmap = new Bitmap(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height);
        Graphics graphics = Graphics.FromImage(bitmap as System.Drawing.Image);
        graphics.CopyFromScreen(25, 25, 25, 25, bitmap.Size);
        bitmap.Save(@"c:\screenshot1.bmp", ImageFormat.Bmp);
    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        
    }
}

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