Asp.net生成缩略图

<script language="VB" runat="server">
　　Sub Page_Load(sender As Object, e As EventArgs)

　　Dim image,aNewImage As System.Drawing.Image
　　dim width,height,newwidth,newheight as integer
　　Dim callb As System.Drawing.Image.GetThumbnailImageAbort

　　'生成缩略图
　　image=System.Drawing.Image.FromFile(Server.MapPath("classpic/"+"rs1.jpg"))
　　width=image.Width
　　height=image.height
　　if width>height then
　　newwidth=110
　　newheight=image.height/image.Width*newwidth
　　else
　　newheight=110
　　newwidth=image.Width/image.height*newheight
　　end if

　　aNewImage=image.GetThumbnailImage(newwidth,newheight,callb,new System.IntPtr())
　　aNewImage.Save(Server.MapPath("smallpic/"+"rs1.gif"))
　　image.Dispose()

　　End Sub
　　</script>