C # snipping Tool WinForm

For several days, the object is more, the mess is messy, and finally a try out.

Bitmap

Graphics

FromImage

Pen

Rectangle

DrawRectangle

Really confused, looked for several days, only to understand the relationship between the parameters.

Download Pan.baidu.com/s/1c2cmrhy

Idea: Form1 is the interface, full screen. Form2 on the area

Form1 Code

inti =0; intW =Screen.PrimaryScreen.Bounds.Width; inth =Screen.PrimaryScreen.Bounds.Height; Private voidButton1_Click (Objectsender, EventArgs e) {WindowState=formwindowstate.minimized; Thread.Sleep ( -); I+=1; Bitmap b=NewBitmap (W,H); Graphics g=Graphics.fromimage (b); G.copyfromscreen (0,0,0,0,NewSize (w,h)); B.save ("c:/users/administrator/desktop/Little Prince"+i+". jpg"); WindowState=Formwindowstate.normal;            Clipboard.setimage (b);  This. Cursor =Cursors.Default; }        Private voidButton3_Click (Objectsender, EventArgs e) {System.Diagnostics.Process.Start ("C:/users/administrator/desktop"); Topmost=false;  This. Cursor =Cursors.Default; }        Private voidButton2_Click (Objectsender, EventArgs e) {             This.            Hide (); Form2 F2=NewForm2 (); F2.        Show (); }

Form2 Code

inti =0;        Bitmap bit;        Bitmap Bit2;        Bitmap copy; intx; inty; intxx; intyy; Pen Pen=NewPen (Color.Red,2); Rectangle rect=NewRectangle ();        Graphics G2; Private voidForm2_load (Objectsender, EventArgs e) {i++; //Opacity = 0.5;WindowState =formwindowstate.minimized; FormBorderStyle=Formborderstyle.none;  This. Cursor =Cursors.cross; intW =Screen.PrimaryScreen.Bounds.Width; inth =Screen.PrimaryScreen.Bounds.Height; Bit=NewBitmap (W, h);//Get desktop DiagramGraphics g = graphics.fromimage (bit);//get the picture out.G.copyfromscreen (0,0,0,0,NewSize (W, h)); pictureBox1.Image=bit; Bit. Save ("c:/users/administrator/desktop/Area"+ i +". jpg"); WindowState=formwindowstate.maximized; }        Private voidPicturebox1_mouseclick (Objectsender, MouseEventArgs e) {            if(E.button = =mousebuttons.right) { This.                Hide (); Form1 F1=NewForm1 (); F1.            Show (); }        }        Private voidPicturebox1_mousedown (Objectsender, MouseEventArgs e) {x=Math.Abs (e.x); Y=Math.Abs (E.Y); }        Private voidPicturebox1_mousemove (Objectsender, MouseEventArgs e) {            if(E.button = =mousebuttons.left) {xx=Math.Abs (e.x); YY=Math.Abs (E.Y); Graphics g=Picturebox1.creategraphics (); Rect=NewRectangle (x, y, Xx-x, yy-y);                Refresh ();                            G.drawrectangle (pen, rect); }        }        Private voidPicturebox1_mouseup (Objectsender, MouseEventArgs e) {            Try{Copy=(Bitmap) bit.                Clone (); Bit2=NewBitmap (rect. Width, Rect.                Height); G2=graphics.fromimage (BIT2); G2. DrawImage (Copy,NewRectangle (0,0, Rect. Width, Rect.                Height), rect, graphicsunit.pixel); pictureBox1.Image=Bit2; Bit2. Save ("c:/users/administrator/desktop/Area"+ i +". jpg");            Clipboard.setimage (BIT2); }

C # Tools WinForm