Question

ASP.NET怎样生成缩略图？

ASP.NET怎样生成缩略图？

Answer 1

System.Drawing.Image image = System.Drawing.Image.FromFile(src);
//src是原来的图片的路径
System.Drawing.Image aNewImage = image.GetThumbnailImage(iWidth, iHeight, null, new System.IntPtr());
//iWidth，iHeight是你想要得新的图片的宽度和高度
aNewImage.Save(Server.MapPath(fileName));
//fileName是新的图片的文件名
image.Dispose();

Answer 2

有现成的源码

Answer 3

预览大尺寸图片的解决方案
System.Drawing.Image img = System.Drawing.Image.FromFile(photoPath);
int width = Convert.ToInt32(img.Width);
int height = Convert.ToInt32(img.Height);
if (width > 400)
{
this.Image1.Width = 400;
}
this.Image1.ImageUrl = photoPath ;