生成缩略图代码,CSharp代码库,德仔网

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【CSharp】生成缩略图

作者:一铛 / 发布于2015/5/6/ 987


	#region 生成缩略图
	 /// <summary>
	 /// 生成缩略图
	 /// </summary>
	 /// <param name="oldpath">原图片地址</param>
	 /// <param name="newpath">新图片地址</param>
	 /// <param name="tWidth">缩略图的宽</param>
	 /// <param name="tHeight">缩略图的高</param>
	 private void GreateMiniImage(string oldpath, string newpath, PictureBox pb)
	 {
	 int tWidth = pb.Width;
	 int tHeight = pb.Height;
	 try
	 {
	 System.Drawing.Image image = System.Drawing.Image.FromFile(oldpath);
	 double bl = 1d;
	 if ((image.Width <= image.Height) && (tWidth >= tHeight))
	 bl = Convert.ToDouble(image.Height) / Convert.ToDouble(tHeight);

	 else if ((image.Width > image.Height) && (tWidth < tHeight))
	 bl = Convert.ToDouble(image.Width) / Convert.ToDouble(tWidth);

	 else
	 {
	 if ((image.Width <= image.Height) && (tWidth <= tHeight))
	 {
	 if (image.Height / tHeight >= image.Width / tWidth)
	 bl = Convert.ToDouble(image.Width) / Convert.ToDouble(tWidth);
	 else
	 bl = Convert.ToDouble(image.Height) / Convert.ToDouble(tHeight);
	 }
	 else
	 {
	 if (image.Height / tHeight >= image.Width / tWidth)
	 bl = Convert.ToDouble(image.Height) / Convert.ToDouble(tHeight);
	 else
	 bl = Convert.ToDouble(image.Width) / Convert.ToDouble(tWidth);
	 }
	 }
	 Bitmap b = new Bitmap(image, Convert.ToInt32(image.Width / bl), Convert.ToInt32(image.Height / bl));
	 b.Save(newpath);
	 pb.ImageLocation = newpath;
	 b.Dispose();
	 image.Dispose();
	 }
	 catch (Exception e)
	 {
	 MessageBox.Show(e.ToString());
	 }
	 }
	 #endregion

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　缩略图　

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