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注意修改命名空间
using System.Drawing; using System.Windows.Forms;
namespace WindowsFormsApplication1
{
class ScreenCapture
{
private Bitmap _screenshot = null;
/// <summary>
/// 截取全屏
/// </summary>
/// <returns>返回值</returns>
public Bitmap CaptureScreen()
{
return Capture(Rectangle.Empty, false);
}
/// <summary>
/// 截取全屏并保存
/// </summary>
/// <param name="fileName">文件路径</param>
/// <returns></returns>
public Bitmap CaptureScreen(string fileName)
{
Bitmap screenshot = Capture(Rectangle.Empty, false);
saveImage(fileName, screenshot);
return screenshot;
}
/// <summary>
/// 截屏到剪切板
/// </summary>
public void CopyToClipboard()
{
if (this._screenshot != null)
Clipboard.SetImage(this._screenshot);
else if (this._screenshot == null)
MessageBox.Show("No screenshot found. Please take a screenshot first.", "Copy to Clipboard");
}
/// <summary>
/// 区域截屏
/// </summary>
/// <param name="rect">区域范围</param>
/// <returns>返回值</returns>
public Bitmap CaptureRectangle(Rectangle rect)
{
return Capture(rect, true);
}
/// <summary>
/// 区域截屏
/// </summary>
/// <param name="rect">区域范围</param>
/// <param name="fileName">文件路径</param>
/// <returns>返回值</returns>
public Bitmap CaptureRectangle(Rectangle rect, string fileName)
{
Bitmap screenshot = Capture(rect, true);
saveImage(fileName, screenshot);
return screenshot;
}
private Bitmap Capture(Rectangle rect, bool isRect)
{
int screenWidth = Screen.PrimaryScreen.Bounds.Width;
int screenHeight = Screen.PrimaryScreen.Bounds.Height;
Bitmap screenshot = null;
if(!isRect)
screenshot = new Bitmap(screenWidth, screenHeight);
else if(isRect)
screenshot = new Bitmap(rect.Width, rect.Height);
Graphics g = Graphics.FromImage(screenshot);
if (!isRect)
{
g.CopyFromScreen(Point.Empty, Point.Empty, screenshot.Size);
}
else if (isRect)
{
g.CopyFromScreen(new Point(rect.X, rect.Y), Point.Empty, rect.Size);
}
this._screenshot = screenshot;
return screenshot;
}
private void saveImage(string fileName, Bitmap screenshot)
{
string ext = System.IO.Path.GetExtension(fileName);;
ext = ext.ToLower();
if (ext == ".jpg" || ext == ".jpeg")
screenshot.Save(fileName, System.Drawing.Imaging.ImageFormat.Jpeg);
else if(ext == ".gif")
screenshot.Save(fileName, System.Drawing.Imaging.ImageFormat.Gif);
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