protected void Page_Load(object sender, EventArgs e)
{
Response.Clear();
Response.ContentType = "image/jpeg";
string s = SessionFacade.GetCaptcha();
Font f = new Font("Times New Roman", 30, FontStyle.Italic | FontStyle.Bold, GraphicsUnit.Pixel);
StringFormat format = new StringFormat();
format.Alignment = StringAlignment.Center;
format.LineAlignment = StringAlignment.Center;
Bitmap bmp = new Bitmap(150, 40, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
Graphics g = Graphics.FromImage(bmp);
g.Clear(Color.White);
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
g.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAlias;
g.DrawString(s, f, Brushes.Black, new RectangleF(0, 0, bmp.Width, bmp.Height), format);
for (int i = -2; i < bmp.Width / 10; i++)
{
g.DrawLine(Pens.OrangeRed, i * 10, 0, i * 10 + 20, bmp.Height);
}
for (int i = -2; i < bmp.Width / 10 + 10; i++)
{
g.DrawLine(Pens.Blue, i * 10, 0, i * 10 - 60, bmp.Height);
}
g.Dispose();
bmp.Save(Response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg);
}
protected void cvCaptcha_ServerValidate(object source, ServerValidateEventArgs args)
{
if (!Settings.GetDisableCaptchaControl(Tools.DetectCurrentWiki()))
{
args.IsValid = txtCaptcha.Text == SessionFacade.GetCaptcha();
}
else
{
args.IsValid = true;
}
}