在asp中显示小图像目录
本文关键字:图像 显示 asp | 更新日期: 2023-09-27 18:00:54
嗨,我想把产品放在目录中,如何将图片裁剪成小图片并保存小图片和原始图片
试试看这里:
带有GetThumbnailImage 的C#缩略图
或此处:
将位图转换为缩略图
创建缩略图并缩小图像大小
创建缩略图
更新
例如,您可以将图像保存到文件夹中,然后可以执行以下操作:
var filename = "sourceImage.png";
using(var image = Image.FromFile(filename))
{
using(var thumbnail = image.GetThumbnailImage(20/*width*/, 40/*height*/, null, IntPtr.Zero))
{
thumbnail.Save("thumb.png");
}
}
更新
要按比例调整大小,请尝试以下操作:
public Bitmap ProportionallyResizeBitmap (Bitmap src, int maxWidth, int maxHeight)
{
// original dimensions
int w = src.Width;
int h = src.Height;
// Longest and shortest dimension
int longestDimension = (w>h)?w: h;
int shortestDimension = (w<h)?w: h;
// propotionality
float factor = ((float)longestDimension) / shortestDimension;
// default width is greater than height
double newWidth = maxWidth;
double newHeight = maxWidth/factor;
// if height greater than width recalculate
if ( w < h )
{
newWidth = maxHeight / factor;
newHeight = maxHeight;
}
// Create new Bitmap at new dimensions
Bitmap result = new Bitmap((int)newWidth, (int)newHeight);
using ( Graphics g = Graphics.FromImage((System.Drawing.Image)result) )
g.DrawImage(src, 0, 0, (int)newWidth, (int)newHeight);
return result;
}