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#region 1
private void CreateCheckCodeImage()
{
//»ñÈ¡Ëæ¼´×Ö·û´®
int number;
char code;
string checkCode = String.Empty;
System.Random random1 = new Random();
for (int i = 0; i < 5; i++)
{
number = random1.Next();
if (number % 2 == 0)
code = (char)('0' + (char)(number % 10));
else
code = (char)('A' + (char)(number % 26));
checkCode += code.ToString();
}
//»­Í¼
System.Drawing.Bitmap image = new System.Drawing.Bitmap((int)Math.Ceiling((checkCode.Length * 13.0)), 24);
Graphics g = Graphics.fromImage(image);
try
{
//Éú³ÉËæ»úÉú³ÉÆ÷
Random random = new Random();
//Çå¿ÕͼƬ±³¾°É«
g.Clear(Color.White);
//»­Í¼Æ¬µÄ±³¾°ÔëÒôÏß
for (int i = 0; i < 25; i++)
{
int x1 = random.Next(image.Width);
int x2 = random.Next(image.Width);
int y1 = random.Next(image.Height);
int y2 = random.Next(image.Height);
g.DrawLine(new Pen(Color.Gray), x1, y1, x2, y2);
}
Font font = new System.Drawing.Font("Verdana", 12, (System.Drawing.FontStyle.Bold | System.Drawing.FontStyle.Italic));
System.Drawing.Drawing2D.LinearGradientBrush brush = new System.Drawing.Drawing2D.LinearGradientBrush(new Rectangle(0, 0, image.Width, image.Height), Color.Blue, Color.DarkRed, 1.2f, true);
g.DrawString(checkCode, font, brush, 2, 2);
//»­Í¼Æ¬µÄǰ¾°ÔëÒôµã
for (int i = 0; i < 80; i++)
{
int x = random.Next(image.Width);
int y = random.Next(image.Height);
image.SetPixel(x, y, Color.fromArgb(random.Next()));
}
//»­Í¼Æ¬µÄ±ß¿òÏß
g.DrawRectangle(new Pen(Colo


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