public BaseCaptcha GenerateBitmapCaptcha(int height = 30, int width = 100, RectangleCaptcha rectf = null)
{
string generatedValue = GenerateStringCaptcha();
Stream stream = GenerateStreamCaptcha(generatedValue, height, width, rectf);
return(new StreamCaptcha()
{
GeneratedValue = generatedValue,
Stream = stream
});
}
/// <summary>
///
/// </summary>
/// <returns></returns>
public BaseCaptcha GenerateCaptcha(int height = 30, int width = 100, RectangleCaptcha rectf = null)
{
string generatedValue = GenerateStringCaptcha();
byte[] byteArr = GenerateStreamCaptcha(generatedValue, height, width, rectf).ToArray();
string binStr = Convert.ToBase64String(byteArr);
return(new Base64Captcha()
{
GeneratedValue = generatedValue,
GeneratedImageBase64 = binStr
});
}
public Bitmap GenerateBitmapCaptcha(string stringCaptcha, int height = 30, int width = 100, RectangleCaptcha rectf = null)
{
Bitmap bmp = new Bitmap(width, height);
Graphics g = Graphics.FromImage(bmp);
g.Clear(Color.White);
g.SmoothingMode = SmoothingMode.AntiAlias;
g.InterpolationMode = InterpolationMode.HighQualityBicubic;
g.PixelOffsetMode = PixelOffsetMode.HighQuality;
g.DrawString(stringCaptcha, new Font("Thaoma", 15, FontStyle.Strikeout), Brushes.Green, RectangleCaptcha.ToRectangleF(rectf));
g.DrawRectangle(new Pen(Brushes.LemonChiffon), 1, 1, width - 8, height - 2);
g.Flush();
g.Dispose();
return(bmp);
}
public MemoryStream GenerateStreamCaptcha(string stringCaptcha, int height = 30, int width = 100, RectangleCaptcha rectf = null)
{
Bitmap bmp = GenerateBitmapCaptcha(stringCaptcha, height, width, rectf);
MemoryStream memoryStream = new MemoryStream();
bmp.Save(memoryStream, ImageFormat.Jpeg);
bmp.Dispose();
memoryStream.Dispose();
return(memoryStream);
}