示例#1
0
        protected void Page_Load(object sender, EventArgs e)
        {
            if (this.IsPostBack)
            {
                return;
            }

            var dbContext = new VisitorsCounterDbEntities();

            using (dbContext)
            {
                dbContext.VisitorsCounters.ToList()[0].Count += 1;
                dbContext.SaveChanges();
            }
        }
示例#2
0
        protected void Page_PreRender(object sender, EventArgs e)
        {
            int    iHeight = 80;
            int    iWidth  = 190;
            Random oRandom = new Random();

            int[] aBackgroundNoiseColor = new int[] { 150, 150, 150 };
            int[] aTextColor            = new int[] { 0, 0, 0 };
            int[] aFontEmSizes          = new int[] { 15, 20, 25, 30, 35 };

            string[] aFontNames = new string[]
            {
                "Comic Sans MS",
                "Arial",
                "Times New Roman",
                "Georgia",
                "Verdana",
                "Geneva"
            };

            FontStyle[] aFontStyles = new FontStyle[]
            {
                FontStyle.Bold,
                FontStyle.Italic,
                FontStyle.Regular,
                FontStyle.Strikeout,
                FontStyle.Underline
            };

            HatchStyle[] aHatchStyles = new HatchStyle[]
            {
                HatchStyle.BackwardDiagonal, HatchStyle.Cross,
                HatchStyle.DashedDownwardDiagonal, HatchStyle.DashedHorizontal,
                HatchStyle.DashedUpwardDiagonal, HatchStyle.DashedVertical,
                HatchStyle.DiagonalBrick, HatchStyle.DiagonalCross,
                HatchStyle.Divot, HatchStyle.DottedDiamond, HatchStyle.DottedGrid,
                HatchStyle.ForwardDiagonal, HatchStyle.Horizontal,
                HatchStyle.HorizontalBrick, HatchStyle.LargeCheckerBoard,
                HatchStyle.LargeConfetti, HatchStyle.LargeGrid,
                HatchStyle.LightDownwardDiagonal, HatchStyle.LightHorizontal,
                HatchStyle.LightUpwardDiagonal, HatchStyle.LightVertical,
                HatchStyle.Max, HatchStyle.Min, HatchStyle.NarrowHorizontal,
                HatchStyle.NarrowVertical, HatchStyle.OutlinedDiamond,
                HatchStyle.Plaid, HatchStyle.Shingle, HatchStyle.SmallCheckerBoard,
                HatchStyle.SmallConfetti, HatchStyle.SmallGrid,
                HatchStyle.SolidDiamond, HatchStyle.Sphere, HatchStyle.Trellis,
                HatchStyle.Vertical, HatchStyle.Wave, HatchStyle.Weave,
                HatchStyle.WideDownwardDiagonal, HatchStyle.WideUpwardDiagonal, HatchStyle.ZigZag
            };

            //Get Captcha in Session
            var    dbContext    = new VisitorsCounterDbEntities();
            string sCaptchaText = dbContext.VisitorsCounters.ToList()[0].Count.ToString();

            //Creates an output Bitmap
            Bitmap   oOutputBitmap = new Bitmap(iWidth, iHeight, PixelFormat.Format24bppRgb);
            Graphics oGraphics     = Graphics.FromImage(oOutputBitmap);

            oGraphics.TextRenderingHint = TextRenderingHint.AntiAlias;

            //Create a Drawing area
            RectangleF oRectangleF = new RectangleF(0, 0, iWidth, iHeight);
            Brush      oBrush      = default(Brush);

            //Draw background (Lighter colors RGB 100 to 255)
            oBrush = new HatchBrush(aHatchStyles[oRandom.Next
                                                     (aHatchStyles.Length - 1)], Color.FromArgb((oRandom.Next(100, 255)),
                                                                                                (oRandom.Next(100, 255)), (oRandom.Next(100, 255))), Color.White);
            oGraphics.FillRectangle(oBrush, oRectangleF);

            System.Drawing.Drawing2D.Matrix oMatrix = new System.Drawing.Drawing2D.Matrix();
            int i = 0;

            for (i = 0; i <= sCaptchaText.Length - 1; i++)
            {
                oMatrix.Reset();
                int iChars = sCaptchaText.Length;
                int x      = iWidth / (iChars + 1) * i;
                int y      = iHeight / 2;

                //Rotate text Random
                oMatrix.RotateAt(oRandom.Next(-40, 40), new PointF(x, y));
                oGraphics.Transform = oMatrix;

                //Draw the letters with Random Font Type, Size and Color
                oGraphics.DrawString
                (
                    //Text
                    sCaptchaText.Substring(i, 1),
                    //Random Font Name and Style
                    new Font(aFontNames[oRandom.Next(aFontNames.Length - 1)],
                             aFontEmSizes[oRandom.Next(aFontEmSizes.Length - 1)],
                             aFontStyles[oRandom.Next(aFontStyles.Length - 1)]),
                    //Random Color (Darker colors RGB 0 to 100)
                    new SolidBrush(Color.FromArgb(oRandom.Next(0, 100),
                                                  oRandom.Next(0, 100), oRandom.Next(0, 100))),
                    x,
                    oRandom.Next(10, 40)
                );
                oGraphics.ResetTransform();
            }

            MemoryStream oMemoryStream = new MemoryStream();

            oOutputBitmap.Save(oMemoryStream, System.Drawing.Imaging.ImageFormat.Png);
            byte[] oBytes = oMemoryStream.GetBuffer();

            oOutputBitmap.Dispose();
            oMemoryStream.Close();

            this.Response.ContentType = "image/jpeg";

            TypeConverter tc           = TypeDescriptor.GetConverter(typeof(Bitmap));
            Bitmap        counterImage = (Bitmap)tc.ConvertFrom(oBytes);

            counterImage.Save(this.Response.OutputStream, ImageFormat.Jpeg);
        }