/// <summary>
/// 创建随机图片
/// </summary>
/// <param name="value">值</param>
/// <param name="imageWidth">图片宽度</param>
/// <param name="imageHeight">图片高度</param>
/// <param name="imageBgColor">图片背景颜色</param>
/// <param name="imageTextColor1">图片文字颜色</param>
/// <param name="imageTextColor2">图片文字颜色</param>
/// <returns>随机图片</returns>
public VerifyImageInfo CreateRandomImage(string value, int imageWidth, int imageHeight, Color imageBgColor, Color imageTextColor1, Color imageTextColor2)
{
var image = new Bitmap(imageWidth, imageHeight);
Graphics g = Graphics.FromImage(image);
//保存图片数据
//var stream = new MemoryStream();
try
{
//生成随机生成器
Random random = new Random();
//清空图片背景色
g.Clear(imageBgColor);
//画图片的背景噪音线
for (int i = 0; i < 5; 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.FromArgb(random.Next(255), random.Next(255), random.Next(255))), x1, y1, x2, y2);
}
var font = new Font("Arial", 12, (System.Drawing.FontStyle.Bold | System.Drawing.FontStyle.Italic));
var brush = new LinearGradientBrush(new Rectangle(0, 0, image.Width, image.Height),
imageTextColor1,
imageTextColor2,
1.2f,
true);
g.DrawString(value, font, brush, 2, 2);
//画图片的前景噪音点
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()));
}
//画图片的边框线
g.DrawRectangle(new Pen(Color.Silver), 0, 0, image.Width - 1, image.Height - 1);
var verifyImage = new VerifyImageInfo();
//image.Save(stream, ImageFormat.Jpeg);
verifyImage.Image = image;// stream.ToArray();
verifyImage.ContentType = "image/jpeg";
return(verifyImage);
}
finally
{
//if (stream != null)
// stream.Dispose();
if (g != null)
{
g.Dispose();
}
if (image != null)
{
image.Dispose();
}
}
}
/// <summary>
/// 产生验证码
/// </summary>
/// <param name="len">长度</param>
/// <param name="onlyNum">只是数字</param>
/// <returns>验证码对象</returns>
public VerifyImageInfo GenerateImage(int len, bool onlyNum)
{
var verifyimage = new VerifyImageInfo {
ImageFormat = ImageFormat.Jpeg, ContentType = "image/pjpeg"
};
var code = CreateVerifyCode(len, onlyNum);
int width = 23 * code.Length;
const int height = 30;
var bitmap = new Bitmap(width, height, PixelFormat.Format32bppArgb);
Color bgcolor = Color.White;
Graphics g = Graphics.FromImage(bitmap);
g.SmoothingMode = SmoothingMode.HighSpeed;
g.Clear(bgcolor);
const int fixedNumber = 60;
var drawBrush = new SolidBrush(Color.FromArgb(Next(100), Next(100), Next(100)));
for (int i = 0; i < 3; i++)
{
var linePen =
new Pen(Color.FromArgb(Next(50) + fixedNumber, Next(50) + fixedNumber, Next(50) + fixedNumber), 1);
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);
Color[] colors =
{
Color.Black, Color.Blue, Color.Green, Color.Navy, Color.MediumBlue, Color.Orange,
Color.Red, Color.DarkGoldenrod, Color.Maroon, Color.Sienna
};
float charx = -18;
for (int i = 0; i < code.Length; i++)
{
M.Reset();
M.RotateAt(Next(10) - 5, new PointF(Next(3) + 2, Next(3) + 2));
charg.Clear(Color.Transparent);
charg.Transform = M;
//定义前景色为黑色
drawBrush.Color = colors[Next(9)]; // Color.Black;
charx = charx + 18 + Next(3);
var drawPoint = new PointF(charx, 1.0F);
charg.DrawString(code[i].ToString(CultureInfo.InvariantCulture), 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;
verifyimage.VerifyCode = code;
return(verifyimage);
}
public VerifyImageInfo GenerateImage(int len, bool onlyNum)
{
var verifyimage = new VerifyImageInfo {
ImageFormat = ImageFormat.Bmp, ContentType = "image/gif"
};
const int width = 155;
const int height = 40;
var bgcolor = Color.White;
var bitmap = new Bitmap(width, height, PixelFormat.Format32bppArgb);
var code = CreateVerifyCode(len, onlyNum);
Graphics g = Graphics.FromImage(bitmap);
//var rect = new Rectangle(0, 0, width, height);
g.SmoothingMode = SmoothingMode.AntiAlias;
g.Clear(bgcolor);
//int emSize = Next(3) + 15;//(int)((width - 20) * 2 / text.Length);
//FontFamily family = fonts[Next(fonts.Length - 1)];
//Font font = new Font(family, emSize, FontStyle.Bold);
//SizeF measured = new SizeF(0, 0);
//SizeF workingSize = new SizeF(width, height);
//while (emSize > 2 && (measured = g.MeasureString(code, font)).Width > workingSize.Width || measured.Height > workingSize.Height)
//{
// font.Dispose();
// font = new Font(family, emSize -= 2);
//}
const int fixedNumber = 0;
var drawBrush = new SolidBrush(Color.FromArgb(Next(100), Next(100), Next(100)));
for (int x = 0; x < 3; x++)
{
var linePen =
new Pen(Color.FromArgb(Next(150) + fixedNumber, Next(150) + fixedNumber, Next(150) + fixedNumber), 1);
g.DrawLine(linePen, new PointF(0.0F + Next(20), 0.0F + Next(height)),
new PointF(0.0F + Next(width), 0.0F + Next(height)));
}
var m = new Matrix();
for (int x = 0; x < code.Length; x++)
{
m.Reset();
m.RotateAt(Next(30) - 15, new PointF(Convert.ToInt64(width * (0.10 * x)), Convert.ToInt64(height * 0.5)));
g.Transform = m;
drawBrush.Color = Color.FromArgb(Next(150) + fixedNumber + 20, Next(150) + fixedNumber + 20,
Next(150) + fixedNumber + 20);
var drawPoint = new PointF(0.0F + Next(4) + x * 20, 3.0F + Next(3));
g.DrawString(Next(1) == 1 ? code[x].ToString(CultureInfo.InvariantCulture) : code[x].ToString(CultureInfo.InvariantCulture).ToUpper(),
Fonts[Next(Fonts.Length - 1)], drawBrush, drawPoint);
g.ResetTransform();
}
double distort = Next(5, 10) * (Next(10) == 1 ? 1 : -1);
using (var copy = (Bitmap)bitmap.Clone())
{
for (int y = 0; y < height; y++)
{
for (int x = 0; x < width; x++)
{
int newX = (int)(x + (distort * Math.Sin(Math.PI * y / 84.5)));
int newY = (int)(y + (distort * Math.Cos(Math.PI * x / 54.5)));
if (newX < 0 || newX >= width)
{
newX = 0;
}
if (newY < 0 || newY >= height)
{
newY = 0;
}
bitmap.SetPixel(x, y, copy.GetPixel(newX, newY));
}
}
}
drawBrush.Dispose();
g.Dispose();
verifyimage.Image = bitmap;
verifyimage.VerifyCode = code;
return(verifyimage);
}
