Winform-based GDI verification code and winformgdi-Based Drawing

Winform-based GDI verification code and winformgdi-Based Drawing

Main functions: Click the verification code to change and enter the verification code to log on.

 

You need to import the namespace System. Drawing;

Generates five random strings:

1 Random random = new Random (); 2 // generate 5 Random strings 3 str = null; 4 for (int I = 0; I <5; I ++) 5 {6 int j = random. next (64, 90); 7 str = str + (char) j; 8}

Draw string

1 // Create Image 2 Bitmap bmp = new Bitmap (); 3 // create a GDI object 4 Graphics g = Graphics. fromImage (bmp); 5 // looping string 6 for (int I = 0; I <str. length; I ++) 7 {8 Point p = new Point (I * 20, 0); 9 // random font 10 string [] fonts = {"", "", "", "subordinate", "",}; 11 // random Color 12 Color [] colors = {Color. red, Color. aquamarine, Color. blue, Color. yellow, Color. yellowGreen}; 13 // draw a string of 14 GB. drawString (str [I]. toString (), new Font (fonts [random. next (0, fonts. length)], 20, FontStyle. bold), new SolidBrush (colors [random. next (0, colors. length)]), p); 15}

The effect is as follows:

At this time, we are adding some lines:

1 　　　　　　　for (int i = 0; i < 20; i++)2             {3                 Point p1 = new Point(random.Next(0, bmp.Width), random.Next(0, bmp.Height));4                 Point p2 = new Point(random.Next(0, bmp.Width), random.Next(0, bmp.Height));5                 g.DrawLine(new Pen(Color.Green), p1, p2);6             }

Draw some pixels:

1 // draw the pixel 2 for (int I = 0; I <500; I ++) 3 {4 Point p = new Point (random. next (0, bmp. width), random. next (0, bmp. height); 5 bmp. setPixel (p. x, p. y, Color. black); 6}

This is basically the case. There is no technical content!

Source Code address: http://pan.baidu.com/s/1gdgYqpt