如何在C#中实现图片缩放(获取图片的高和宽)？？（请求高手指点,先谢了）

Question

如何在C#中有没有像在php中的这种方法。<?php<br>function MyImg($imgfile) {<br>  $size = GetImageSize($imgfile);<br>  echo "<img src="$imgfile" $size[3]>";<br>}<br>MyImg("img/img1.gif");<br>MyImg("img/img2.png");<br>?><br>

Answer 1

调用image类中的函数即可。
public bool ThumbnailCallback()
{
return false;
}
public void Example_GetThumb(PaintEventArgs e)
{
Image.GetThumbnailImageAbort myCallback =
new Image.GetThumbnailImageAbort(ThumbnailCallback);
Bitmap myBitmap = new Bitmap("Climber.jpg");
Image myThumbnail = myBitmap.GetThumbnailImage(
40, 40, myCallback, IntPtr.Zero);
e.Graphics.DrawImage(myThumbnail, 150, 75);
}

Answer 2

public static System.Drawing.Image Set_Image_Size(double width,double height,System.Drawing.Image image)
{
double new_height;
double new_width;
double scale;
new_height=height;
new_width=width;
if((image.Width>width)||(image.Height>height))
{
if(image.Width>width)
{
scale=image.Width/width;
new_width=image.Width/scale;
new_height=image.Height/scale;
}
else
{
scale=image.Height/height;
new_width=image.Width/scale;
new_height=image.Height/scale;
}
}
System.Drawing.Image.GetThumbnailImageAbort myCallback =new System.Drawing.Image.GetThumbnailImageAbort(ThumbnailCallback);
System.Drawing.Image myimage=image.GetThumbnailImage(Convert.ToInt32(new_width),Convert.ToInt32(new_height),myCallback,new System.IntPtr());
image.Dispose();
return myimage;
}
public static bool ThumbnailCallback()
{
return false;
}