using System.IO
public void Page_Load(object sender)
{
FileStream stream=new FileStream(Server.MapPath("pciture.gif"),FileMode.Open);
long FileSize=stream.Length;//獲取流長度
byte[] Buffer=new byte[(int)FileSize];//定義一個二維數組
sream.Read(Buffer,0,(int)FileSize);//從瀏中讀取字節塊並將該數據寫入給定的緩衝區
stream.Close();
Response.BinaryWrite(Buffer);//輸出圖片
}