Question

.net怎么做等比缩放图片，给点代码谢谢了

Answer 1

//读取大图
Image image = Image.FromFile(@"c:\1.jpg");
//按比例缩小 长高设定一个值
int smallWidth = 150;
int smallHeight = 100;
if (image.Width > image.Height)
{
smallHeight = smallWidth * image.Height / image.Width;
}
else
{
smallWidth = smallHeight * image.Width / image.Height;
}
//缩略图
Bitmap bitmap = new Bitmap(smallWidth, smallHeight);
Graphics g = Graphics.FromImage(bitmap);
g.DrawImage(image, 0, 0, smallWidth, smallHeight);
//保存图片 第二个参数根据自己的图片格式选择
bitmap.Save(@"d\:1.jpg",System.Drawing.Imaging.ImageFormat.Jpeg);
g.Dispose();
bitmap.Dispose();
image.Dispose();