/// <summary>
/// 上传略缩图并添加水印
/// </summary>
/// <param name="files">FileUpload控件</param>
/// <returns></returns>
public static void ImageUpLoad(FileUpload files, Int32 Width, Int32 Height, Watermark watermark, ref string picpath)
{
//System.Drawing.Image xImage;
System.Drawing.Bitmap xBitmap;
int PhotoHeight, PhotoWidth;
//Rectangle NewPhoto;
System.Drawing.Imaging.ImageFormat xObject;
picpath = "";
if (files.FileName != "")
{
string ext = EKFileUpload.getExtend(files.FileName);
ext = ext.ToLower();
if (ext == "gif" || ext == "jpg" || ext == "jpeg" || ext == "bmp" || ext == "png")
{
long FLength = files.PostedFile.ContentLength / 1024;
if (FLength > MS_ConfigBLL.UploadSize)
{
EKMessageBox.Show("文件上传失败！因为上传的文件超过了" + MS_ConfigBLL.UploadSize + "KB！");
}
else
{
string createfilename = EKFileUpload.createFileName();
string FileName = "/" + MS_ConfigBLL.UploadPath + "/" + EKFileUpload.getMyPath() + createfilename + "." + ext;
string SaveFile = EKFileUpload.FilePath + FileName;
//EKFileUpload.doCreatrDir(SaveFile);
//files.SaveAs(SaveFile);
picpath = FileName.Replace("//", "/");
switch (ext)
{
case ".gif":
xObject = System.Drawing.Imaging.ImageFormat.Gif;
break;
case ".bmp":
xObject = System.Drawing.Imaging.ImageFormat.Bmp;
break;
case ".png":
xObject = System.Drawing.Imaging.ImageFormat.Png;
break;
default:
xObject = System.Drawing.Imaging.ImageFormat.Jpeg;
break;
}
xBitmap = new Bitmap(files.FileContent);//------------------
PhotoHeight = xBitmap.Height;
PhotoWidth = xBitmap.Width;
Int32 TempHeight = 0;
Int32 TempWidth = 0;
if (PhotoWidth <= Width && PhotoHeight <= Height)
{
TempWidth = PhotoWidth;
TempHeight = PhotoHeight;
}
else
{
if (PhotoWidth > Width)//图片宽度大于设定宽度
{
TempWidth = Width;
TempHeight = Convert.ToInt32(Convert.ToDecimal(PhotoHeight) / Convert.ToDecimal(PhotoWidth) * Convert.ToDecimal(Width));
if (TempHeight > Height)
{
TempWidth = Convert.ToInt32(Convert.ToDecimal(TempWidth) / Convert.ToDecimal(TempHeight) * Convert.ToDecimal(Height));
TempHeight = Height;
}
}
else
{
if (PhotoHeight > Height)
{
TempHeight = Height;
TempWidth = Convert.ToInt32(Convert.ToDecimal(PhotoWidth) / Convert.ToDecimal(PhotoHeight) * Convert.ToDecimal(Height));
}
}
//System.Web.HttpContext.Current.Response.Write(TempHeight.ToString()+"，");
//System.Web.HttpContext.Current.Response.Write(TempWidth.ToString());
//System.Web.HttpContext.Current.Response.End();
if (TempHeight <= 0)
{
TempHeight = 1;
}
if (TempWidth <= 0)
{
TempWidth = 1;
}
}
System.Drawing.Image bitmap = new System.Drawing.Bitmap(TempWidth, TempHeight);
//新建一个画板
System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bitmap);
//设置高质量插值法
g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
//设置高质量,低速度呈现平滑程度
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
g.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
//清空一下画布
g.Clear(Color.Empty);
//在指定位置画图
g.DrawImage(xBitmap, new System.Drawing.Rectangle(0, 0, TempWidth, TempHeight), new System.Drawing.Rectangle(1, 1, xBitmap.Width - 1, xBitmap.Height - 1), System.Drawing.GraphicsUnit.Pixel);
//添加水印
if (watermark != null)
{
if (watermark.MarkType == "text")
{
//声明字体对象
Font cFont = null;
//用来测试水印文本长度得尺子
SizeF size = new SizeF();
int[] sizes = new int[] { watermark.Size, 48, 32, 16, 8, 6, 4 };
//探测出一个适合图片大小得字体大小，以适应水印文字大小得自适应
for (int i = 0; i < 7; i++)
{
if (sizes[i] == 0)
{
continue;
}
//创建一个字体对象
cFont = new Font(watermark.FontFamily, sizes[i], FontStyle.Regular);
//是否加粗、倾斜
if (watermark.TextBlod && watermark.TextItalic)
{
cFont = new Font(watermark.FontFamily, sizes[i], FontStyle.Bold | FontStyle.Italic);
}
else if (watermark.TextBlod)
{
cFont = new Font(watermark.FontFamily, sizes[i], FontStyle.Bold);
}
else if (watermark.TextItalic)
{
cFont = new Font(watermark.FontFamily, sizes[i], FontStyle.Italic);
}
//测量文本大小
size = g.MeasureString(watermark.Text, cFont);
//匹配第一个符合要求得字体大小
if ((ushort)size.Width < (ushort)TempWidth)
{
break;
}
}
Brush brush = new SolidBrush(Color.FromArgb(Convert.ToInt32(watermark.Transparency * 255), watermark.TextColor));
//添加水印 文字
g.DrawString(watermark.Text, cFont, brush, watermark.Position(watermark.Place, new SizeF(TempWidth, TempHeight), size));
}
else if (watermark.MarkType == "image")
{
//获得水印图像
System.Drawing.Image markImg = System.Drawing.Image.FromFile(EKFileUpload.FilePath + watermark.ImgPath);
//创建颜色矩阵
float[][] ptsArray =
{
new float[] { 1, 0, 0, 0, 0 },
new float[] { 0, 1, 0, 0, 0 },
new float[] { 0, 0, 1, 0, 0 },
new float[] { 0, 0, 0, watermark.Transparency, 0 }, //注意：此处为0.0f为完全透明，1.0f为完全不透明
new float[] { 0, 0, 0, 0, 1 }
};
ColorMatrix colorMatrix = new ColorMatrix(ptsArray);
//新建一个Image属性
ImageAttributes imageAttributes = new ImageAttributes();
//将颜色矩阵添加到属性
imageAttributes.SetColorMatrix(colorMatrix, ColorMatrixFlag.Default,
ColorAdjustType.Default);
//原图过小
if (markImg.Width > TempWidth || markImg.Height > TempHeight)
{
System.Drawing.Image.GetThumbnailImageAbort callb = null;
//对水印图片生成缩略图,缩小到原图得1/4
System.Drawing.Image new_img = markImg.GetThumbnailImage(TempWidth / 4, markImg.Height * TempWidth / 4 / markImg.Width, callb, new System.IntPtr());
//添加水印图片
g.DrawImage(new_img, watermark.Position(watermark.Place, new Size(TempWidth, TempHeight), new_img.Size), 0, 0, new_img.Width, new_img.Height, GraphicsUnit.Pixel, imageAttributes);
//释放缩略图
new_img.Dispose();
}
else
{
//添加水印图片
g.DrawImage(markImg, watermark.Position(watermark.Place, new Size(TempWidth, TempHeight), markImg.Size), 0, 0, markImg.Width, markImg.Height, GraphicsUnit.Pixel, imageAttributes);
}
}
}
// 以下代码为保存图片时,设置压缩质量
EncoderParameters encoderParams = new EncoderParameters();
long[] quality = new long[1];
quality[0] = 95;
EncoderParameter encoderParam = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, quality);
encoderParams.Param[0] = encoderParam;
//获得包含有关内置图像编码解码器的信息的ImageCodecInfo 对象.
ImageCodecInfo[] arrayICI = ImageCodecInfo.GetImageEncoders();
ImageCodecInfo jpegICI = null;
for (int x = 0; x < arrayICI.Length; x++)
{
if (arrayICI[x].FormatDescription.Equals("jpeg"))
{
jpegICI = arrayICI[x];
//设置JPEG编码
break;
}
}
if (jpegICI != null)
{
//System.Web.HttpContext.Current.Response.Write("a");
EKFileUpload.doCreatrDir(SaveFile);
bitmap.Save(SaveFile, jpegICI, encoderParams);
}
else
{
//System.Web.HttpContext.Current.Response.Write("b");
EKFileUpload.doCreatrDir(SaveFile);
bitmap.Save(SaveFile, xObject);
}
g.Dispose();
bitmap.Dispose();
xBitmap.Dispose();
}
}
//picpath = FileName;
}
else
{
EKMessageBox.Show("文件上传失败,因为文件格式不允许上传！");
return;
}
}
/// <summary>
/// 添加水印并替换原图
/// </summary>
/// <param name="imagepath">图片路径</param>
/// <param name="watermark">水印信息</param>
/// <param name="width">生成图片的宽的上限，0为保持原图</param>
/// <param name="height">生成图片的高的上限，0为保持原图</param>
public static void AddWatermark(string imagepath, Watermark watermark, int Width, int Height)
{
System.Drawing.Imaging.ImageFormat xObject;
string ext = EKFileUpload.getExtend(imagepath);
ext = ext.ToLower();
switch (ext)
{
case ".gif":
xObject = System.Drawing.Imaging.ImageFormat.Gif;
break;
case ".bmp":
xObject = System.Drawing.Imaging.ImageFormat.Bmp;
break;
case ".png":
xObject = System.Drawing.Imaging.ImageFormat.Png;
break;
default:
xObject = System.Drawing.Imaging.ImageFormat.Jpeg;
break;
}
Bitmap xBitmap = new Bitmap(imagepath);
System.Drawing.Image bitmap;
System.Drawing.Graphics g;
CreateThumbnail(Width, Height, xBitmap, out bitmap, out g);
//添加水印
if (watermark != null)
{
int TempWidth = bitmap.Width;
int TempHeight = bitmap.Height;
if (watermark.MarkType == "text")
{
//声明字体对象
Font cFont = null;
//用来测试水印文本长度得尺子
SizeF size = new SizeF();
int[] sizes = new int[] { watermark.Size, 60, 48, 40, 36, 32, 30, 28, 24, 22, 20, 18, 16, 14, 12, 8, 6, 4 };
//探测出一个适合图片大小得字体大小，以适应水印文字大小得自适应
for (int i = 0; i < 18; i++)
{
if (sizes[i] == 0)
{
continue;
}
//创建一个字体对象
cFont = new Font(watermark.FontFamily, sizes[i], FontStyle.Regular);
//是否加粗、倾斜
if (watermark.TextBlod && watermark.TextItalic)
{
cFont = new Font(watermark.FontFamily, sizes[i], FontStyle.Bold | FontStyle.Italic);
}
else if (watermark.TextBlod)
{
cFont = new Font(watermark.FontFamily, sizes[i], FontStyle.Bold);
}
else if (watermark.TextItalic)
{
cFont = new Font(watermark.FontFamily, sizes[i], FontStyle.Italic);
}
//测量文本大小
size = g.MeasureString(watermark.Text, cFont);
//匹配第一个符合要求得字体大小
if ((ushort)size.Width < (ushort)TempWidth)
{
break;
}
}
Brush brush = new SolidBrush(Color.FromArgb(Convert.ToInt32(watermark.Transparency * 255), watermark.TextColor));
//添加水印 文字
g.DrawString(watermark.Text, cFont, brush, watermark.Position(watermark.Place, new SizeF(TempWidth, TempHeight), size));
}
else if (watermark.MarkType == "image")
{
//获得水印图像
System.Drawing.Image markImg = System.Drawing.Image.FromFile(EKFileUpload.FilePath + watermark.ImgPath);
//创建颜色矩阵
float[][] ptsArray =
{
new float[] { 1, 0, 0, 0, 0 },
new float[] { 0, 1, 0, 0, 0 },
new float[] { 0, 0, 1, 0, 0 },
new float[] { 0, 0, 0, watermark.Transparency, 0 }, //注意：此处为0.0f为完全透明，1.0f为完全不透明
new float[] { 0, 0, 0, 0, 1 }
};
ColorMatrix colorMatrix = new ColorMatrix(ptsArray);
//新建一个Image属性
ImageAttributes imageAttributes = new ImageAttributes();
//将颜色矩阵添加到属性
imageAttributes.SetColorMatrix(colorMatrix, ColorMatrixFlag.Default,
ColorAdjustType.Default);
//原图过小
if (markImg.Width > TempWidth || markImg.Height > TempHeight)
{
System.Drawing.Image.GetThumbnailImageAbort callb = null;
//对水印图片生成缩略图,缩小到原图得1/4
System.Drawing.Image new_img = markImg.GetThumbnailImage(TempWidth / 4, markImg.Height * TempWidth / 4 / markImg.Width, callb, new System.IntPtr());
//添加水印图片
g.DrawImage(new_img, watermark.Position(watermark.Place, new Size(TempWidth, TempHeight), new_img.Size), 0, 0, new_img.Width, new_img.Height, GraphicsUnit.Pixel, imageAttributes);
//释放缩略图
new_img.Dispose();
}
else
{
//添加水印图片
g.DrawImage(markImg, watermark.Position(watermark.Place, new Size(TempWidth, TempHeight), markImg.Size), 0, 0, markImg.Width, markImg.Height, GraphicsUnit.Pixel, imageAttributes);
}
}
}
//释放原图对象
xBitmap.Dispose();
//保存图片
ImageSave(imagepath, bitmap, xObject);
g.Dispose();
bitmap.Dispose();
}
