添加水印的強大代碼，這是我從Discuz!Nt挖出來的代碼
功能很強大，編寫也很好，可以添加圖片水印和文字水印兩種
添加出來的效果非常好，現在就把代碼貼出來，供大家欣賞
要導入的空間：
Codeusing System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
添加圖片水印的方法：
Code/// <summary>
/// 加圖片水印
/// </summary>
/// <param name="filename">文件名</param>
/// <param name="watermarkFilename">水印文件名</param>
/// <param name="watermarkStatus">圖片水印位置 0=不使用 1=左上 2=中上 3=右上 4=左中
9=右下</param>/// <param name="quality">附加圖片質量，1是 0不是</param>
/// <param name="watermarkTransparency">水印的透明度 1--10 10爲不透明</param>
public static void AddImageSignPic(Image img, string filename, string watermarkFilename, int watermarkStatus, int quality, int watermarkTransparency)
{
Graphics g = Graphics.FromImage(img);
//設置高質量插值法
g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
//設置高質量,低速度呈現平滑程度
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
Image watermark = new Bitmap(watermarkFilename);
if (watermark.Height >= img.Height || watermark.Width >= img.Width)
{
return;
}
ImageAttributes imageAttributes = new ImageAttributes();
ColorMap colorMap = new ColorMap();
colorMap.OldColor = Color.FromArgb(255, 0, 255, 0);
colorMap.NewColor = Color.FromArgb(0, 0, 0, 0);
ColorMap[] remapTable = { colorMap };
imageAttributes.SetRemapTable(remapTable, ColorAdjustType.Bitmap);
float transparency = 0.5F;
if (watermarkTransparency >= 1 && watermarkTransparency <= 10)
{
transparency = (watermarkTransparency / 10.0F);
}
float[][] colorMatrixElements = {
new float[] {1.0f, 0.0f, 0.0f, 0.0f, 0.0f},
new float[] {0.0f, 1.0f, 0.0f, 0.0f, 0.0f},
new float[] {0.0f, 0.0f, 1.0f, 0.0f, 0.0f},
new float[] {0.0f, 0.0f, 0.0f, transparency, 0.0f},
new float[] {0.0f, 0.0f, 0.0f, 0.0f, 1.0f}
};
ColorMatrix colorMatrix = new ColorMatrix(colorMatrixElements);
imageAttributes.SetColorMatrix(colorMatrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap);
int xpos = 0;
int ypos = 0;
switch (watermarkStatus)
{
case 1:
xpos = (int)(img.Width * (float).01);
ypos = (int)(img.Height * (float).01);
break;
case 2:
xpos = (int)((img.Width * (float).50) - (watermark.Width / 2));
ypos = (int)(img.Height * (float).01);
break;
case 3:
xpos = (int)((img.Width * (float).99) - (watermark.Width));
ypos = (int)(img.Height * (float).01);
break;
case 4:
xpos = (int)(img.Width * (float).01);
ypos = (int)((img.Height * (float).50) - (watermark.Height / 2));
break;
case 5:
xpos = (int)((img.Width * (float).50) - (watermark.Width / 2));
ypos = (int)((img.Height * (float).50) - (watermark.Height / 2));
break;
case 6:
xpos = (int)((img.Width * (float).99) - (watermark.Width));
ypos = (int)((img.Height * (float).50) - (watermark.Height / 2));
break;
case 7:
xpos = (int)(img.Width * (float).01);
ypos = (int)((img.Height * (float).99) - watermark.Height);
break;
case 8:
xpos = (int)((img.Width * (float).50) - (watermark.Width / 2));
ypos = (int)((img.Height * (float).99) - watermark.Height);
break;
case 9:
xpos = (int)((img.Width * (float).99) - (watermark.Width));
ypos = (int)((img.Height * (float).99) - watermark.Height);
break;
}
g.DrawImage(watermark, new Rectangle(xpos, ypos, watermark.Width, watermark.Height), 0, 0, watermark.Width, watermark.Height, GraphicsUnit.Pixel, imageAttributes);
//g.DrawImage(watermark, new System.Drawing.Rectangle(xpos, ypos, watermark.Width, watermark.Height), 0, 0, watermark.Width, watermark.Height, System.Drawing.GraphicsUnit.Pixel);
ImageCodecInfo[] codecs = ImageCodecInfo.GetImageEncoders();
ImageCodecInfo ici = null;
foreach (ImageCodecInfo codec in codecs)
{
if (codec.MimeType.IndexOf("jpeg") > -1)
{
ici = codec;
}
}
EncoderParameters encoderParams = new EncoderParameters();
long[] qualityParam = new long[1];
if (quality < 0 || quality > 100)
{
quality = 80;
}
qualityParam[0] = quality;
EncoderParameter encoderParam = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, qualityParam);
encoderParams.Param[0] = encoderParam;
if (ici != null)
{
img.Save(filename, ici, encoderParams);
}
else
{
img.Save(filename);
}
g.Dispose();
img.Dispose();
watermark.Dispose();
imageAttributes.Dispose();
}
下面這個是添加文字水印的方法
Code/// <summary>
/// 增加圖片文字水印
/// </summary>
/// <param name="filename">文件名</param>
/// <param name="watermarkText">水印文字</param>
/// <param name="watermarkStatus">圖片水印位置</param>
public static void AddImageSignText(Image img, string filename, string watermarkText, int watermarkStatus, int quality, string fontname, int fontsize)
{
//System.Drawing.Bitmap bmp = new System.Drawing.Bitmap(img);
// .FromFile(filename);
Graphics g = Graphics.FromImage(img);
Font drawFont = new Font(fontname, fontsize, FontStyle.Regular, GraphicsUnit.Pixel);
SizeF crSize;
crSize = g.MeasureString(watermarkText, drawFont);
float xpos = 0;
float ypos = 0;
switch (watermarkStatus)
{
case 1:
xpos = (float)img.Width * (float).01;
ypos = (float)img.Height * (float).01;
break;
case 2:
xpos = ((float)img.Width * (float).50) - (crSize.Width / 2);
ypos = (float)img.Height * (float).01;
break;
case 3:
xpos = ((float)img.Width * (float).99) - crSize.Width;
ypos = (float)img.Height * (float).01;
break;
case 4:
xpos = (float)img.Width * (float).01;
ypos = ((float)img.Height * (float).50) - (crSize.Height / 2);
break;
case 5:
xpos = ((float)img.Width * (float).50) - (crSize.Width / 2);
ypos = ((float)img.Height * (float).50) - (crSize.Height / 2);
break;
case 6:
xpos = ((float)img.Width * (float).99) - crSize.Width;
ypos = ((float)img.Height * (float).50) - (crSize.Height / 2);
break;
case 7:
xpos = (float)img.Width * (float).01;
ypos = ((float)img.Height * (float).99) - crSize.Height;
break;
case 8:
xpos = ((float)img.Width * (float).50) - (crSize.Width / 2);
ypos = ((float)img.Height * (float).99) - crSize.Height;
break;
case 9:
xpos = ((float)img.Width * (float).99) - crSize.Width;
ypos = ((float)img.Height * (float).99) - crSize.Height;
break;
}
// System.Drawing.StringFormat StrFormat = new System.Drawing.StringFormat();
// StrFormat.Alignment = System.Drawing.StringAlignment.Center;
//
// g.DrawString(watermarkText, drawFont, new System.Drawing.SolidBrush(System.Drawing.Color.White), xpos + 1, ypos + 1, StrFormat);
// g.DrawString(watermarkText, drawFont, new System.Drawing.SolidBrush(System.Drawing.Color.Black), xpos, ypos, StrFormat);
g.DrawString(watermarkText, drawFont, new SolidBrush(Color.White), xpos + 1, ypos + 1);
g.DrawString(watermarkText, drawFont, new SolidBrush(Color.Black), xpos, ypos);
ImageCodecInfo[] codecs = ImageCodecInfo.GetImageEncoders();
ImageCodecInfo ici = null;
foreach (ImageCodecInfo codec in codecs)
{
if (codec.MimeType.IndexOf("jpeg") > -1)
{
ici = codec;
}
}
EncoderParameters encoderParams = new EncoderParameters();
long[] qualityParam = new long[1];
if (quality < 0 || quality > 100)
{
quality = 80;
}
qualityParam[0] = quality;
EncoderParameter encoderParam = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, qualityParam);
encoderParams.Param[0] = encoderParam;
if (ici != null)
{
img.Save(filename, ici, encoderParams);
}
else
{
img.Save(filename);
}
g.Dispose();
//bmp.Dispose();
img.Dispose();
}
這個是我測試用的代碼
CodeImage img = Image.FromStream(this.FileUpload1.PostedFile.InputStream);
string filename = Server.MapPath("img/test1.jpg");
string watername = Server.MapPath("img/11.jpg");
WaterMark.AddImageSignPic(img, filename, watername, 1, 100, 6);
我的整個測試代碼在這裏，大家可以下載