上载到服务器后减小图像大小 [英] Reduce image size after upload to server

问题描述

只需阅读有关调整图像大小的一些文章，但在用户从数字电话摄像头上传图像后找不到能减小尺寸的文章?

我正在寻找的是一种在用户上载到Web服务器后立即进行大小调整的工具?谁能指出一个方向?

rgds，
kfl.

Hi,

Just read some articless on resize image but can not find one that can do reduce the size after the user upload a image from digital phone camera?

What I am looking for is a facility to do the resize on the fly - immediately after user upload to the web server? Can anyone point a direction?

rgds,
kfl.

推荐答案

KF！

我只是从 http://www.switchedonthecode.com :

Hi KF!

I just scratched this from http://www.switchedonthecode.com:

private static Image resizeImage(Image imgToResize, Size size)
{
   int sourceWidth = imgToResize.Width;
   int sourceHeight = imgToResize.Height;

   float nPercent = 0;
   float nPercentW = 0;
   float nPercentH = 0;

   nPercentW = ((float)size.Width / (float)sourceWidth);
   nPercentH = ((float)size.Height / (float)sourceHeight);

   if (nPercentH < nPercentW)
      nPercent = nPercentH;
   else
      nPercent = nPercentW;

   int destWidth = (int)(sourceWidth * nPercent);
   int destHeight = (int)(sourceHeight * nPercent);

   Bitmap b = new Bitmap(destWidth, destHeight);
   Graphics g = Graphics.FromImage((Image)b);
   g.InterpolationMode = InterpolationMode.HighQualityBicubic;

   g.DrawImage(imgToResize, 0, 0, destWidth, destHeight);
   g.Dispose();

   return (Image)b;
}

我当然希望您的意思是ASP.net，而不是ASP. ASP已死，应该早就被埋葬了:).
不过，希望该代码段对您有所帮助！


干杯，


曼弗雷德(Manfred)

I sure do hope you meant ASP.net and not ASP. ASP is dead and should have been buried a long time ago :) .
Nevertheless, I hope the code snippet helps you!


Cheers,


Manfred

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