C#水印
1
base.Response.ContentType = "image/jpeg";
2 Bitmap image = new Bitmap(Server.MapPath("2008-12-31.jpg"));
3 Bitmap waterImage = new Bitmap(Server.MapPath("74.png"));
4
5 Graphics graphics = Graphics.FromImage(image);
6 graphics.InterpolationMode = InterpolationMode.High;
7 graphics.SmoothingMode = SmoothingMode.HighQuality;
8 ImageAttributes imageatta = new ImageAttributes();
9 ColorMap colorMap = new ColorMap();
10 colorMap.OldColor = Color.FromArgb(225, 0, 225, 0);
11 colorMap.NewColor = Color.FromArgb(0, 222, 0, 0);
12
ColorMap[] RemapTable = { colorMap };
13 //imageatta.SetRemapTable(RemapTable, ColorAdjustType.Bitmap);
14 float[][] colorMatrixElm = {
15
new float[] {1, 0, 0, 0, 0},
16 new float[] {0, 1, 0, 0, 0},
17 new float[] {0, 0, 1, 0, 0},
18 new float[] {0, 0, 0, 0.5f, 0},
19 new float[] {0, 0, 0, 0, 1}
20
};
21 ColorMatrix colorMatrix = new ColorMatrix(colorMatrixElm);
22 imageatta.SetColorMatrix(colorMatrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap);
23 int yPos = 0;
24 int xPos = 0;
25 graphics.DrawImage(waterImage, new Rectangle(xPos, yPos, waterImage.Width, waterImage.Height), 0, 0, waterImage.Width, waterImage.Height, GraphicsUnit.Pixel, imageatta);
26 graphics.Dispose();
27 image.Save(base.Response.OutputStream, ImageFormat.Jpeg);
28 image.Dispose();
29 waterImage.Dispose();
base.Response.ContentType = "image/jpeg";2
Bitmap image = new Bitmap(Server.MapPath("2008-12-31.jpg"));3
Bitmap waterImage = new Bitmap(Server.MapPath("74.png"));4
5
Graphics graphics = Graphics.FromImage(image);6
graphics.InterpolationMode = InterpolationMode.High;7
graphics.SmoothingMode = SmoothingMode.HighQuality;8
ImageAttributes imageatta = new ImageAttributes();9
ColorMap colorMap = new ColorMap();10
colorMap.OldColor = Color.FromArgb(225, 0, 225, 0);11
colorMap.NewColor = Color.FromArgb(0, 222, 0, 0);12
ColorMap[] RemapTable = { colorMap };
ColorMap[] RemapTable 
13
//imageatta.SetRemapTable(RemapTable, ColorAdjustType.Bitmap);14
float[][] colorMatrixElm = {15
new float[] {1, 0, 0, 0, 0},
16
new float[] {0, 1, 0, 0, 0},17
new float[] {0, 0, 1, 0, 0},18
new float[] {0, 0, 0, 0.5f, 0}, 19
new float[] {0, 0, 0, 0, 1}20
};21
ColorMatrix colorMatrix = new ColorMatrix(colorMatrixElm);22
imageatta.SetColorMatrix(colorMatrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap);23
int yPos = 0;24
int xPos = 0;25
graphics.DrawImage(waterImage, new Rectangle(xPos, yPos, waterImage.Width, waterImage.Height), 0, 0, waterImage.Width, waterImage.Height, GraphicsUnit.Pixel, imageatta);26
graphics.Dispose();27
image.Save(base.Response.OutputStream, ImageFormat.Jpeg);28
image.Dispose();29
waterImage.Dispose();
