Graphics.ReleaseHdc : Graphics « System.Drawing « C# / C Sharp by API

1. C# / C Sharp by API
2. System.Drawing
3. Graphics

Graphics.ReleaseHdc

  
using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Windows.Forms;
   
class CreateMetafileMemory: Form
{
     MemoryStream ms = new MemoryStream();
   
     public static void Main()
     {
          Application.Run(new CreateMetafileMemory());
     }
     public CreateMetafileMemory()
     {
          ResizeRedraw = true; 
   
          Graphics grfx = CreateGraphics();
          IntPtr ipHdc = grfx.GetHdc();
   
          Metafile mf = new Metafile(ms, ipHdc); 
   
          grfx.ReleaseHdc(ipHdc);
          grfx.Dispose();
          grfx = Graphics.FromImage(mf);
   
          grfx.FillEllipse(Brushes.Gray, 0, 0, 100, 100);
          grfx.DrawEllipse(Pens.Black, 0, 0, 100, 100);
          grfx.DrawArc(new Pen(Color.Red, 10), 20, 20, 60, 60, 30, 120);
          grfx.Dispose();
     }
     protected override void OnPaint(PaintEventArgs pea)
     {
          DoPage(pea.Graphics, ForeColor,ClientSize.Width, ClientSize.Height);
     }        
     protected void DoPage(Graphics grfx, Color clr, int cx, int cy)
     {
          ms.Position = 0;
          Metafile mf = new Metafile(ms);
   
          for (int y = 0; y < cy; y += mf.Height)
          for (int x = 0; x < cx; x += mf.Width)
               grfx.DrawImage(mf, x, y, mf.Width, mf.Height);
     }
}

   
    
  

Related examples in the same category