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asp判断gif图像尺寸

ASP 2008/2/17 7:55:00  点击:不统计

<html>

<body>

<form action="up.asp" ENCTYPE="multipart/form-data" method="post">

<table border=0 width=100% cellspacing="0">

 <tr>

  <td width="30%">请选择您要上传的gif图片:</td>

  <td width="70%"><input type="file" name="pic" style="font-size:10pt;"></td>

 </tr>

</table>  

<p align="center"><input type="submit" value="提交" style="font-size:9pt;background-color:#54B060;color:white;">

</form>

</body>

</html>





up.asp



<%

  

  FormSize = Request.TotalBytes

  FormData = Request.BinaryRead( FormSize )

  

  bncrlf=chrb(13) & chrb(10)

  divider=leftb(formdata,instrb(formdata,bncrlf)-1)

  datastart=instrb(formdata,bncrlf & bncrlf)+4

  dataend=instrb(datastart+1,formdata,divider)-datastart

  Image=midb(formdata,datastart,dataend)



  head_version = Ascb( midb( Image,1,3 ) )

  head_subversion = Ascb( midb( Image,4,3 ) )



  head_width_l = Ascb( midb( Image,7,1 ) )

  head_width_h = Ascb( midb( Image,8,1 ) )



  head_height_l = Ascb( midb( Image,9,1 ) )

  head_height_h = Ascb( midb( Image,10,1 ) )



  head_colors = Ascb( midb( Image, 11, 1 ) )



  head_width_h = head_width_h * 256

  

  head_height_h = head_height_h * 256

  

  

  head_colors = head_colors And &H07



  Response.Write "图像大小为" & head_width_h + head_width_l & "x" & head_height_h + head_height_l _

    & "x" & 2^( head_colors + 1 )

  



%>



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