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public string SaveCutPic(string pPath, string pSavedPath, int pPartStartPointX, int pPartStartPointY, int pPartWidth, int pPartHeight, int pOrigStartPointX, int pOrigStartPointY, int imageWidth, int imageHeight)
{
using (System.Drawing.Image originalImg = System.Drawing.Image.FromFile(pPath))
{
if (originalImg.Width == imageWidth && originalImg.Height == imageHeight)
{
return SaveCutPic(pPath, pSavedPath, pPartStartPointX, pPartStartPointY, pPartWidth, pPartHeight,
pOrigStartPointX, pOrigStartPointY);
}
string filename = DateTime.Now.ToString("yyyyMMddHHmmss") + ".jpg";
string filePath = pSavedPath + "\\" + filename;
Bitmap thumimg = MakeThumbnail(originalImg, imageWidth, imageHeight);
Bitmap partImg = new Bitmap(pPartWidth, pPartHeight);
Graphics graphics = Graphics.FromImage(partImg);
Rectangle destRect = new Rectangle(new Point(pPartStartPointX, pPartStartPointY), new Size(pPartWidth, pPartHeight));//目标位置
Rectangle origRect = new Rectangle(new Point(pOrigStartPointX, pOrigStartPointY), new Size(pPartWidth, pPartHeight));//原图位置(默认从原图中截取的图片大小等于目标图片的大小)
///文字水印
Graphics G = Graphics.FromImage(partImg);
//Font f = new Font("Lucida Grande", 6);
//Brush b = new SolidBrush(Color.Gray);
G.Clear(Color.White);
// 指定高质量的双三次插值法。执行预筛选以确保高质量的收缩。此模式可产生质量最高的转换图像。
G.InterpolationMode = InterpolationMode.HighQualityBicubic;
// 指定高质量、低速度呈现。
G.SmoothingMode = SmoothingMode.HighQuality;
graphics.DrawImage(thumimg, destRect, origRect, GraphicsUnit.Pixel);
//G.DrawString("Xuanye", f, b, 0, 0);
G.Dispose();
originalImg.Dispose();
if (File.Exists(filePath))
{
File.SetAttributes(filePath, FileAttributes.Normal);
File.Delete(filePath);
}
partImg.Save(filePath, ImageFormat.Jpeg);
partImg.Dispose();
thumimg.Dispose();
return filename;
}
}
public Bitmap MakeThumbnail(System.Drawing.Image fromImg, int width, int height)
{
Bitmap bmp = new Bitmap(width, height);
int ow = fromImg.Width;
int oh = fromImg.Height;
//新建一个画板
Graphics g = Graphics.FromImage(bmp);
//设置高质量插值法
g.InterpolationMode = InterpolationMode.High;
//设置高质量,低速度呈现平滑程度
g.SmoothingMode = SmoothingMode.HighQuality;
//清空画布并以透明背景色填充
g.Clear(Color.Transparent);
g.DrawImage(fromImg, new Rectangle(0, 0, width, height),
new Rectangle(0, 0, ow, oh),
GraphicsUnit.Pixel);
return bmp;
}
public string SaveCutPic(string pPath, string pSavedPath, int pPartStartPointX, int pPartStartPointY, int pPartWidth, int pPartHeight, int pOrigStartPointX, int pOrigStartPointY)
{
string filename = DateTime.Now.ToString("yyyyMMddHHmmss") + ".jpg";
string filePath = pSavedPath + "\\" + filename;
using (System.Drawing.Image originalImg = System.Drawing.Image.FromFile(pPath))
{
Bitmap partImg = new Bitmap(pPartWidth, pPartHeight);
Graphics graphics = Graphics.FromImage(partImg);
Rectangle destRect = new Rectangle(new Point(pPartStartPointX, pPartStartPointY), new Size(pPartWidth, pPartHeight));//目标位置
Rectangle origRect = new Rectangle(new Point(pOrigStartPointX, pOrigStartPointY), new Size(pPartWidth, pPartHeight));//原图位置(默认从原图中截取的图片大小等于目标图片的大小)
///注释 文字水印
Graphics G = Graphics.FromImage(partImg);
//Font f = new Font("Lucida Grande", 6);
//Brush b = new SolidBrush(Color.Gray);
G.Clear(Color.White);
// 指定高质量的双三次插值法。执行预筛选以确保高质量的收缩。此模式可产生质量最高的转换图像。
G.InterpolationMode = InterpolationMode.HighQualityBicubic;
// 指定高质量、低速度呈现。
G.SmoothingMode = SmoothingMode.HighQuality;
graphics.DrawImage(originalImg, destRect, origRect, GraphicsUnit.Pixel);
//G.DrawString("Product", f, b, 0, 0);
G.Dispose();
originalImg.Dispose();
if (File.Exists(filePath))
{
File.SetAttributes(filePath, FileAttributes.Normal);
File.Delete(filePath);
}
partImg.Save(filePath, ImageFormat.Jpeg);
partImg.Dispose();
}
return filename;
}
这个只是重载的一个方法。 if (originalImg.Width == imageWidth && originalImg.Height == imageHeight) 表示没有做截图效果的时候。还是原图
if (originalImg.Width == imageWidth && originalImg.Height == imageHeight)
{
return SaveCutPic(pPath, pSavedPath, pPartStartPointX, pPartStartPointY, pPartWidth, pPartHeight,
pOrigStartPointX, pOrigStartPointY);
}
你确定错误是发生在这个函数里?这里 return 也应该释放资源吧