C# fileupload image 联动效果

一、放到html头 <style type="text/css"> #newPreview { FILTER: progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=scale)} </style> <script type="text/javascript" language="javascript"> function PreviewImg(imgFile) { var newPreview = document.getElementById("newPreview"); // newPreview.filters.item("DXImageTransform.Microsoft.AlphaImageLoader").src = imgFile.value; // newPreview.style.width ="480px" ; // newPreview.style.height = "240px"; newPreview.src=imgFile.value; newPreview. } </script> 二、放到body <div > <img id ="newPreview" style="width: 50px; height: 30px"/> </div> 三、放到 load 事件里： IdName.Attributes.Add("onchange", "return PreviewImg(this);");