Mega Code Archive

 

Categories / C# / 2D Graphics

 

Create a green color with an alpha component then draw a green rectangle to the bitmap in memory

using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; public class Form1 : Form {     protected override void OnPaint(PaintEventArgs e) {         Graphics gForm = e.Graphics;         gForm.FillRectangle(Brushes.White, this.ClientRectangle);         for (int i = 1; i <= 7; ++i) {             Rectangle r = new Rectangle(i * 40 - 15, 0, 15,                                         this.ClientRectangle.Height);             gForm.FillRectangle(Brushes.Orange, r);         }         Bitmap bmp = new Bitmap(260, 260, System.Drawing.Imaging.PixelFormat.Format32bppArgb);         Graphics gBmp = Graphics.FromImage(bmp);         Color green = Color.FromArgb(0x40, 0, 0xff, 0);         Brush greenBrush = new SolidBrush(green);         gBmp.FillRectangle(greenBrush, 10, 10, 140, 140);         gForm.DrawImage(bmp, 20, 20, bmp.Width, bmp.Height);         bmp.Dispose();         gBmp.Dispose();         greenBrush.Dispose();     }     public static void Main() {         Application.Run(new Form1());     } }