ASP.NET获取上传图片的大小

1.采用客户端javascript可以取得图片大小

<input id="FileUpload" type="file" size="30" name="FileUpload" onpropertychange="javascript:img2.src=this.value;">

<img id="img2" src="" style="visibility:hidden;position:absolute;top=-10000"/>

<input type="button" value="获取" onclick="javascript:abc();">

<script type="text/javascript">

function abc() {

alert(img2.width);

}

</script>

2.采用流取得图片大小　

Stream stream=file.PostedFile.InputStream;

System.Drawing.Image image=System.Drawing.Image.FromStream(stream);

int
picWidth= image.Width;

int
picheight= image.Height;

3.使用文件得到图片大小

System.Drawing.Image image=System.Drawing.Image.FromFile（物理路径）

int picWidth= image.Width;

int picheight = image.Height;