<% @ Webhandler Language = "C #" class = "drawline1" %> Using system;
Using system. Web;
Using system. Collections. Generic;
Using system. drawing;
Using system. Drawing. drawing2d;
Using system. IO;
Using system. Drawing. imaging; Public class drawline1: ihttphandler
{
Public void processrequest (httpcontext context)
{
List <point> points = getpointarray1 (); Using (Bitmap chartingimage = new Bitmap (320,240 ))
{
Using (Graphics G = graphics. fromimage (chartingimage ))
{
// Specify the use of smooth processing (also known as the Anti-sawtooth function ).
G. smoothingmode = smoothingmode. antialias;
G. fillrectangle (New lineargradientbrush (New rectangle (0, 0,320,240), color. deeppink, color. yellowgreen, lineargradientmode. Vertical), new rectangle (0, 0,320,240 )); Using (pen p = new pen (color. Yellow, 2 ))
{
If (points. Count> 1)
{
Int startx = points [0]. X;
Int starty = points [0]. Y; For (INT I = 1; I <points. Count; I ++)
{
G. drawline (p, startx, starty, points [I]. X, points [I]. y );
Startx = points [I]. X;
Starty = points [I]. Y;
}
G. drawstring ("Shenzhen A shares:" + convert. tostring (240-points [points. count-1]. y), new font ("", 20), brushes. yellow, 0, 0 );
}
} Using (pen p = new pen (color. Red, 2 ))
{
If (points. Count> 1)
{
Int startx = points [0]. x + 20;
Int starty = points [0]. Y-10; For (INT I = 1; I <points. Count; I ++)
{
G. drawline (p, startx, starty, points [I]. x + 20, points [I]. Y-10 );
Startx = points [I]. x + 20;
Starty = points [I]. Y-10;
}
}
} Context. response. contenttype = "image/PNG ";
Context. response. cache. setnostore ();
Context. response. cache. setcacheability (httpcacheability. nocache );
Context. response. cache. setexpires (datetime. Now );
Context. response. cache. setvaliduntilexpires (false ); Using (memorystream MS = new memorystream ())
{
Chartingimage. Save (MS, imageformat. PNG );
Ms. Flush ();
Context. response. binarywrite (Ms. getbuffer ());
}
}
}
} Private list <point> getpointarray1 ()
{
List <point> points = (list <point>) (httpcontext. Current. cache ["pointarray1"]); If (points = NULL)
{
Points = new list <point> ();
Points. Add (new point (0,120); // Add the first coordinate point (0,120 ).
Httpcontext. Current. cache ["X1"] = 0;
Httpcontext. Current. cache ["Y1"] = 120;
}
Random r = new random (); Int x = convert. toint32 (httpcontext. Current. cache ["X1"]) + 10;
Int y = convert. toint32 (httpcontext. Current. cache ["Y1"]); If (x = 320)
{
X = 0;
Y = 120;
Points. Clear ();
} If (Y % 2 = 0)
{
Y + = R. Next (0, 11 );
}
Else
{
Y-= R. Next (0, 11 );
} Points. Add (new point (x, y ));
Httpcontext. Current. cache ["pointarray1"] = points;
Httpcontext. Current. cache ["X1"] = X;
Httpcontext. Current. cache ["Y1"] = y;
Return points;
}
Public bool isreusable
{
Get
{
Return false;
}
}
} |
