画面キャプチャアプリケーションを作成していますが、すべてうまくいっています。私がする必要があるのは、アクティブなウィンドウをキャプチャし、このアクティブなウィンドウのスクリーンショットを撮ることです。誰かが私がこれを行う方法を知っていますか?
12 に答える
Rectangle bounds = Screen.GetBounds(Point.Empty);
using(Bitmap bitmap = new Bitmap(bounds.Width, bounds.Height))
{
using(Graphics g = Graphics.FromImage(bitmap))
{
g.CopyFromScreen(Point.Empty, Point.Empty, bounds.Size);
}
bitmap.Save("test.jpg", ImageFormat.Jpeg);
}
現在のウィンドウの使用をキャプチャするため
Rectangle bounds = this.Bounds;
using (Bitmap bitmap = new Bitmap(bounds.Width, bounds.Height))
{
using (Graphics g = Graphics.FromImage(bitmap))
{
g.CopyFromScreen(new Point(bounds.Left,bounds.Top), Point.Empty, bounds.Size);
}
bitmap.Save("C://test.jpg", ImageFormat.Jpeg);
}
ScreenCapture sc = new ScreenCapture();
// capture entire screen, and save it to a file
Image img = sc.CaptureScreen();
// display image in a Picture control named imageDisplay
this.imageDisplay.Image = img;
// capture this window, and save it
sc.CaptureWindowToFile(this.Handle,"C:\\temp2.gif",ImageFormat.Gif);
http://www.developerfusion.com/code/4630/capture-a-screen-shot/
現在アクティブなウィンドウ(C#アプリケーションだけでなく)または画面全体をキャプチャするための次のソリューションを提案します。それぞれ、ウィンドウまたは画面の左上隅を基準にしたカーソル位置を決定します。
public enum enmScreenCaptureMode
{
Screen,
Window
}
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;
public int Top;
public int Right;
public int Bottom;
}
public Bitmap Capture(enmScreenCaptureMode screenCaptureMode = enmScreenCaptureMode.Window)
{
Rectangle bounds;
if (screenCaptureMode == enmScreenCaptureMode.Screen)
{
bounds = Screen.GetBounds(Point.Empty);
CursorPosition = Cursor.Position;
}
else
{
var foregroundWindowsHandle = GetForegroundWindow();
var rect = new Rect();
GetWindowRect(foregroundWindowsHandle, 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;
}
public Point CursorPosition
{
get;
protected set;
}
}
これは、デスクトップまたはアクティブウィンドウのいずれかをキャプチャするためのスニペットです。Windowsフォームへの参照はありません。
public class ScreenCapture
{
[DllImport("user32.dll")]
private static extern IntPtr GetForegroundWindow();
[DllImport("user32.dll", CharSet = CharSet.Auto, ExactSpelling = true)]
public static extern IntPtr GetDesktopWindow();
[StructLayout(LayoutKind.Sequential)]
private struct Rect
{
public int Left;
public int Top;
public int Right;
public int Bottom;
}
[DllImport("user32.dll")]
private static extern IntPtr GetWindowRect(IntPtr hWnd, ref Rect rect);
public static Image CaptureDesktop()
{
return CaptureWindow(GetDesktopWindow());
}
public static Bitmap CaptureActiveWindow()
{
return CaptureWindow(GetForegroundWindow());
}
public static Bitmap CaptureWindow(IntPtr handle)
{
var rect = new Rect();
GetWindowRect(handle, ref rect);
var bounds = new Rectangle(rect.Left, rect.Top, rect.Right - rect.Left, rect.Bottom - rect.Top);
var result = new Bitmap(bounds.Width, bounds.Height);
using (var graphics = Graphics.FromImage(result))
{
graphics.CopyFromScreen(new Point(bounds.Left, bounds.Top), Point.Empty, bounds.Size);
}
return result;
}
}
画面全体をキャプチャする方法:
var image = ScreenCapture.CaptureDesktop();
image.Save(@"C:\temp\snippetsource.jpg", ImageFormat.Jpeg);
アクティブなウィンドウをキャプチャする方法:
var image = ScreenCapture.CaptureActiveWindow();
image.Save(@"C:\temp\snippetsource.jpg", ImageFormat.Jpeg);
もともとここで見つかりました:http ://www.snippetsource.net/Snippet/158/capture-screenshot-in-c
KvanTTTのコードはうまく機能しました。保存形式の柔軟性を少し高め、hWnd、.NET Control/Formで保存できるように少し拡張しました。いくつかのオプションを使用して、ビットマップを取得したり、ファイルに保存したりできます。
using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Runtime.InteropServices;
using System.Windows.Forms;
namespace MosaiqPerformanceMonitor {
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;
public int Top;
public int Right;
public int Bottom;
}
[DllImport("user32.dll", CharSet = CharSet.Auto, ExactSpelling = true)]
public static extern IntPtr GetDesktopWindow();
/// <summary> Capture Active Window, Desktop, Window or Control by hWnd or .NET Contro/Form and save it to a specified file. </summary>
/// <param name="filename">Filename.
/// <para>* If extension is omitted, it's calculated from the type of file</para>
/// <para>* If path is omitted, defaults to %TEMP%</para>
/// <para>* Use %NOW% to put a timestamp in the filename</para></param>
/// <param name="mode">Optional. The default value is CaptureMode.Window.</param>
/// <param name="format">Optional file save mode. Default is PNG</param>
public static void CaptureAndSave(string filename, CaptureMode mode = CaptureMode.Window, ImageFormat format = null) {
ImageSave(filename, format, Capture(mode));
}
/// <summary> Capture a specific window (or control) and save it to a specified file. </summary>
/// <param name="filename">Filename.
/// <para>* If extension is omitted, it's calculated from the type of file</para>
/// <para>* If path is omitted, defaults to %TEMP%</para>
/// <para>* Use %NOW% to put a timestamp in the filename</para></param>
/// <param name="handle">hWnd (handle) of the window to capture</param>
/// <param name="format">Optional file save mode. Default is PNG</param>
public static void CaptureAndSave(string filename, IntPtr handle, ImageFormat format = null) {
ImageSave(filename, format, Capture(handle));
}
/// <summary> Capture a specific window (or control) and save it to a specified file. </summary>
/// <param name="filename">Filename.
/// <para>* If extension is omitted, it's calculated from the type of file</para>
/// <para>* If path is omitted, defaults to %TEMP%</para>
/// <para>* Use %NOW% to put a timestamp in the filename</para></param>
/// <param name="c">Object to capture</param>
/// <param name="format">Optional file save mode. Default is PNG</param>
public static void CaptureAndSave(string filename, Control c, ImageFormat format = null) {
ImageSave(filename, format, Capture(c));
}
/// <summary> Capture the active window (default) or the desktop and return it as a bitmap </summary>
/// <param name="mode">Optional. The default value is CaptureMode.Window.</param>
public static Bitmap Capture(CaptureMode mode = CaptureMode.Window) {
return Capture(mode == CaptureMode.Screen ? GetDesktopWindow() : GetForegroundWindow());
}
/// <summary> Capture a .NET Control, Form, UserControl, etc. </summary>
/// <param name="c">Object to capture</param>
/// <returns> Bitmap of control's area </returns>
public static Bitmap Capture(Control c) {
return Capture(c.Handle);
}
/// <summary> Capture a specific window and return it as a bitmap </summary>
/// <param name="handle">hWnd (handle) of the window to capture</param>
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;
/// <summary> Save an image to a specific file </summary>
/// <param name="filename">Filename.
/// <para>* If extension is omitted, it's calculated from the type of file</para>
/// <para>* If path is omitted, defaults to %TEMP%</para>
/// <para>* Use %NOW% to put a timestamp in the filename</para></param>
/// <param name="format">Optional file save mode. Default is PNG</param>
/// <param name="image">Image to save. Usually a BitMap, but can be any
/// Image.</param>
static void ImageSave(string filename, ImageFormat format, Image image) {
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 = filename.Replace("%NOW%", DateTime.Now.ToString("yyyy-MM-dd@hh.mm.ss"));
image.Save(filename, format);
}
}
}
スクリーンショットを取得するために使用すると仮定しますGraphics.CopyFromScreen
。
P / Invoke to GetForegroundWindowを使用して(次にその位置とサイズを取得して)、コピー元の領域を決定できます。
この質問のコードを使用できます:スクリーンショットをWindowsのファイルに直接保存するにはどうすればよいですか?
WIN32_API.GetDesktopWindow()
キャプチャするウィンドウのHandleプロパティに変更するだけです。
マネージコードを使用する場合:これにより、ProcessIdを介して任意のウィンドウがキャプチャされます。
以下を使用してウィンドウをアクティブにしました。
Microsoft.VisualBasic.Interaction.AppActivate(ProcessId);
Threading.Thread.Sleep(20);
印刷画面を使用してウィンドウをキャプチャしました。
SendKeys.SendWait("%{PRTSC}");
Threading.Thread.Sleep(40);
IDataObject objData = Clipboard.GetDataObject();
次のコードを使用します。
// Shot size = screen size
Size shotSize = Screen.PrimaryScreen.Bounds.Size;
// the upper left point in the screen to start shot
// 0,0 to get the shot from upper left point
Point upperScreenPoint = new Point(0, 0);
// the upper left point in the image to put the shot
Point upperDestinationPoint = new Point(0, 0);
// create image to get the shot in it
Bitmap shot = new Bitmap(shotSize.Width, shotSize.Height);
// new Graphics instance
Graphics graphics = Graphics.FromImage(shot);
// get the shot by Graphics class
graphics.CopyFromScreen(upperScreenPoint, upperDestinationPoint, shotSize);
// return the image
pictureBox1.Image = shot;
デスクトップスケーリングが設定されている場合に機能します。
public class ScreenCapture
{
[DllImport("user32.dll")]
private static extern IntPtr GetForegroundWindow();
[DllImport("user32.dll", CharSet = CharSet.Auto, ExactSpelling = true)]
public static extern IntPtr GetDesktopWindow();
[StructLayout(LayoutKind.Sequential)]
private struct Rect
{
public int Left;
public int Top;
public int Right;
public int Bottom;
}
[DllImport("user32.dll")]
private static extern IntPtr GetWindowRect(IntPtr hWnd, ref Rect rect);
public static Image CaptureDesktop()
{
return CaptureWindow(GetDesktopWindow());
}
public static Bitmap CaptureActiveWindow()
{
return CaptureWindow(GetForegroundWindow());
}
public static Bitmap CaptureWindow(IntPtr handle)
{
var rect = new Rect();
GetWindowRect(handle, ref rect);
GetScale getScale = new GetScale();
var bounds = new Rectangle(rect.Left, rect.Top, (int)((rect.Right - rect.Left)* getScale.getScalingFactor()), (int)((rect.Bottom - rect.Top )* getScale.getScalingFactor()));
var result = new Bitmap(bounds.Width, bounds.Height);
using (var graphics = Graphics.FromImage(result))
{
graphics.CopyFromScreen(new Point(bounds.Left, bounds.Top), Point.Empty, bounds.Size);
}
return result;
}
}
メソッドstaticvoidImageSave()を少し調整すると、保存先のオプションが表示されます。クレジットはMicrosoftに送られます(http://msdn.microsoft.com/en-us/library/sfezx97z.aspx)
static void ImageSave(string filename, ImageFormat format, Image image, SaveFileDialog saveFileDialog1)
{
saveFileDialog1.Filter = "JPeg Image|*.jpg|Bitmap Image|*.bmp|Gif Image|*.gif";
saveFileDialog1.Title = "Enregistrer un image";
saveFileDialog1.ShowDialog();
// If the file name is not an empty string open it for saving.
if (saveFileDialog1.FileName != "")
{
// Saves the Image via a FileStream created by the OpenFile method.
System.IO.FileStream fs =
(System.IO.FileStream)saveFileDialog1.OpenFile();
// Saves the Image in the appropriate ImageFormat based upon the
// File type selected in the dialog box.
// NOTE that the FilterIndex property is one-based.
switch (saveFileDialog1.FilterIndex)
{
case 1:
image.Save(fs,
System.Drawing.Imaging.ImageFormat.Jpeg);
break;
case 2:
image.Save(fs,
System.Drawing.Imaging.ImageFormat.Bmp);
break;
case 3:
image.Save(fs,
System.Drawing.Imaging.ImageFormat.Gif);
break;
}
fs.Close();
}
}
button_clickイベントは、次のようにコーディングする必要があります...
private void btnScreenShot_Click(object sender, EventArgs e)
{
SaveFileDialog saveFileDialog1 = new SaveFileDialog();
ScreenCapturer.CaptureAndSave(filename, mode, format, saveFileDialog1);
}//
ArsenMkrtの応答に基づいていますが、これを使用すると、フォームでコントロールをキャプチャできます(たとえば、WebBrowserコントロールが含まれ、その表示だけをキャプチャしたいツールを作成しています)。PointToScreenメソッドの使用に注意してください。
//Project: WebCapture
//Filename: ScreenshotUtils.cs
//Author: George Birbilis (http://zoomicon.com)
//Version: 20130820
using System.Drawing;
using System.Windows.Forms;
namespace WebCapture
{
public static class ScreenshotUtils
{
public static Rectangle Offseted(this Rectangle r, Point p)
{
r.Offset(p);
return r;
}
public static Bitmap GetScreenshot(this Control c)
{
return GetScreenshot(new Rectangle(c.PointToScreen(Point.Empty), c.Size));
}
public static Bitmap GetScreenshot(Rectangle bounds)
{
Bitmap bitmap = new Bitmap(bounds.Width, bounds.Height);
using (Graphics g = Graphics.FromImage(bitmap))
g.CopyFromScreen(new Point(bounds.Left, bounds.Top), Point.Empty, bounds.Size);
return bitmap;
}
public const string DEFAULT_IMAGESAVEFILEDIALOG_TITLE = "Save image";
public const string DEFAULT_IMAGESAVEFILEDIALOG_FILTER = "PNG Image (*.png)|*.png|JPEG Image (*.jpg)|*.jpg|Bitmap Image (*.bmp)|*.bmp|GIF Image (*.gif)|*.gif";
public const string CUSTOMPLACES_COMPUTER = "0AC0837C-BBF8-452A-850D-79D08E667CA7";
public const string CUSTOMPLACES_DESKTOP = "B4BFCC3A-DB2C-424C-B029-7FE99A87C641";
public const string CUSTOMPLACES_DOCUMENTS = "FDD39AD0-238F-46AF-ADB4-6C85480369C7";
public const string CUSTOMPLACES_PICTURES = "33E28130-4E1E-4676-835A-98395C3BC3BB";
public const string CUSTOMPLACES_PUBLICPICTURES = "B6EBFB86-6907-413C-9AF7-4FC2ABF07CC5";
public const string CUSTOMPLACES_RECENT = "AE50C081-EBD2-438A-8655-8A092E34987A";
public static SaveFileDialog GetImageSaveFileDialog(
string title = DEFAULT_IMAGESAVEFILEDIALOG_TITLE,
string filter = DEFAULT_IMAGESAVEFILEDIALOG_FILTER)
{
SaveFileDialog dialog = new SaveFileDialog();
dialog.Title = title;
dialog.Filter = filter;
/* //this seems to throw error on Windows Server 2008 R2, must be for Windows Vista only
dialog.CustomPlaces.Add(CUSTOMPLACES_COMPUTER);
dialog.CustomPlaces.Add(CUSTOMPLACES_DESKTOP);
dialog.CustomPlaces.Add(CUSTOMPLACES_DOCUMENTS);
dialog.CustomPlaces.Add(CUSTOMPLACES_PICTURES);
dialog.CustomPlaces.Add(CUSTOMPLACES_PUBLICPICTURES);
dialog.CustomPlaces.Add(CUSTOMPLACES_RECENT);
*/
return dialog;
}
public static void ShowSaveFileDialog(this Image image, IWin32Window owner = null)
{
using (SaveFileDialog dlg = GetImageSaveFileDialog())
if (dlg.ShowDialog(owner) == DialogResult.OK)
image.Save(dlg.FileName);
}
}
}
Bitmapオブジェクトがあれば、Saveを呼び出すだけです。
private void btnCapture_Click(object sender, EventArgs e)
{
webBrowser.GetScreenshot().Save("C://test.jpg", ImageFormat.Jpeg);
}
上記は、GCがビットマップを取得することを前提としていますが、someControl.getScreenshot()の結果をビットマップ変数に割り当て、各画像の終了時にその変数を手動で破棄することをお勧めします。特に、この取得を頻繁に行う場合は(ロードしてそれらのスクリーンショットを保存したいウェブページのリストがあるとしましょう):
private void btnCapture_Click(object sender, EventArgs e)
{
Bitmap bitmap = webBrowser.GetScreenshot();
bitmap.ShowSaveFileDialog();
bitmap.Dispose(); //release bitmap resources
}
さらに良いことに、using句を使用できます。これには、using(子)ブロック内で例外が発生した場合でもビットマップリソースを解放するという追加の利点があります。
private void btnCapture_Click(object sender, EventArgs e)
{
using(Bitmap bitmap = webBrowser.GetScreenshot())
bitmap.ShowSaveFileDialog();
//exit from using block will release bitmap resources even if exception occured
}
アップデート:
これで、WebCaptureツールがWebからClickOnceでデプロイされ(http://gallery.clipflair.net/WebCapture)(ClickOnceのおかげで自動更新もサポートされます)、そのソースコードはhttps://github.com/Zoomiconにあります。 / ClipFlair / tree / master / Server / Tools / WebCapture