Asp.net上传图片产生预览效果

1在页面上放入一个上传控件和一个图片控件.

 

< asp:FileUpload  ID ="FileUpload1"  runat ="server"  onpropertychange ="show(this.value)" />
         < asp:Image  ID ="Image1"  runat ="server"    />

2在上传控件中写onpropertychange="show(this.value)"事件并调用js中的show函数并将自身的参数传进js.

 

     < script type = " text/javascript " >
     function  show(id)
     ... {
        document.getElementById("Image1").src=id;
    }
     </ script >

 Ie6,Ie7测试通过(注要通过滤器实现)

 

< div  id ="divview"  style ="filter : progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=image);WIDTH: 166px; HEIGHT: 190px" >
<!-- 用于显示图片 -->


</ div >

< asp:FileUpload  ID ="FileUpload3"  runat ="server"  onpropertychange ="show1(this.value)" />

 

 

< script type = " text/javascript " >

function  show1(upimg)
... {
 var dd=document.getElementById("divview");
 dd.filters.item("DXImageTransform.Microsoft.AlphaImageLoader").src = upimg;
 dd.style.width = 166;
 dd.style.height = 190;
 dd.filters.item("DXImageTransform.Microsoft.AlphaImageLoader").sizingMethod = 'scale';
}

</ script >