★★★请问怎么样获取图片的高和宽，下面的方法为什么不对

[sunwww168]

System.Web.UI.WebControls.Image imageobject=new System.Web.UI.WebControls.Image();
imageobject.ID="imag"+i+j;
imageobject.ImageUrl="upfiles/"+str[pp++];
Llr.Text=imageobject.Width.Value;
为什么Llr.Text显示的结果是0；怎样才能显示正确的结果？
在线等待。。。。

[rickjelly2004]

esponse.Write(ImageButton1.ImageUrl);
System.Drawing.Image logo = System.Drawing.Image.FromFile(Server.MapPath(ImageButton1.ImageUrl));
Response.Write(logo.Width);
Response.Write(logo.Height);
logo.Dispose();

[rickjelly2004]

HttpPostedFile myFile =File2.PostedFile;
int nFileLen = myFile.ContentLength;
byte[] myData = new byte[nFileLen];
myFile.InputStream.Read(myData, 0, nFileLen);
FileStream newFile = new FileStream(Sb.ToString(), FileMode.Create);
newFile.Write(myData, 0, myData.Length);
System.Drawing.Image img = System.Drawing.Image.FromStream(newFile);
int intHeight = img.Height;
int intWidth = img.Width;