public VerifyImageInfo GenerateImage(string code, int width, int height, Color bgcolor, int textcolor)
{
VerifyImageInfo verifyimage = new VerifyImageInfo();
verifyimage.ImageFormat = ImageFormat.Jpeg;
verifyimage.ContentType = "image/pjpeg";
// 直接指定尺寸, 而不使用外部参数中的建议尺寸
//width = 120;
//height = 40;
Bitmap bitmap = new Bitmap(width, height, PixelFormat.Format32bppArgb);
Graphics g = Graphics.FromImage(bitmap);
g.SmoothingMode = SmoothingMode.HighSpeed;
g.Clear(bgcolor);
int fixedNumber = textcolor == 2 ? 60 : 0;
Pen linePen = new Pen(Color.FromArgb(Next(50) + fixedNumber, Next(50) + fixedNumber, Next(50) + fixedNumber), 1);
SolidBrush drawBrush = new SolidBrush(Color.FromArgb(Next(100), Next(100), Next(100)));
for (int i = 0; i < 3; i++)
{
g.DrawArc(linePen, Next(20) - 10, Next(20) - 10, Next(width) + 10, Next(height) + 10, Next(-100, 100), Next(-200, 200));
}
Graphics charg = Graphics.FromImage(charbmp);
float charx = -18;
for (int i = 0; i < code.Length; i++)
{
m.Reset();
m.RotateAt(Next(50) - 25, new PointF(Next(3) + 7, Next(3) + 7));
charg.Clear(Color.Transparent);
charg.Transform = m;
//定义前景色为黑色
drawBrush.Color = Color.Black;
charx = charx + 18 + Next(5);
PointF drawPoint = new PointF(charx, 2.0F);
charg.DrawString(code[i].ToString(), fonts[Next(fonts.Length - 1)], drawBrush, new PointF(0, 0));
charg.ResetTransform();
g.DrawImage(charbmp, drawPoint);
}
drawBrush.Dispose();
g.Dispose();
charg.Dispose();
verifyimage.Image = bitmap;
return(verifyimage);
}
public VerifyImageInfo GenerateImage(string code, int width, int height, Color bgcolor, int textcolor)
{
VerifyImageInfo verifyimage = new VerifyImageInfo();
verifyimage.ImageFormat = ImageFormat.Gif;
verifyimage.ContentType = "image/Gif";
var image = new Bitmap((int)Math.Ceiling((code.Length * 12.5)), 22);
Graphics g = Graphics.FromImage(image);
try
{
//生成随机生成器
Random random = new Random();
//清空图片背景色
g.Clear(bgcolor);
//画图片的背景噪音线
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.Silver), x1, y1, x2, y2);
}
Font font = new Font("Arial", 12, (FontStyle.Bold));
var brush = new LinearGradientBrush(new Rectangle(0, 0, image.Width, image.Height), Color.Blue, Color.DarkRed, 1.2f, true);
g.DrawString(code, font, brush, 2, 2);
//画图片的前景噪音点
for (int i = 0; i < 50; i++)
{
int x = random.Next(image.Width);
int y = random.Next(image.Height);
image.SetPixel(x, y, Color.FromArgb(random.Next()));
}
//画图片的边框线
g.DrawRectangle(new Pen(Color.Silver), 0, 0, image.Width - 1, image.Height - 1);
}
finally
{
g.Dispose();
}
verifyimage.Image = image;
return(verifyimage);
}