直接使用FileUpload,服务端是无法找到上传文件的。前面有篇文章介绍了解决方法,但是那种解决方法就使得UpdatePanel变得没有任何意义,也失去了使用它的初衷,先可以采用以下办法。
1:新建主页面Default.aspx
在适当的位置,放置一个上传附件的UpdatePanel区域
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2:新建上传文件的页面attachment.aspx,然后放上FileUpload控件
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3:在attachment.aspx里面,上传文件之后调用主页面的js:
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![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
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4:Default.aspx主页面里面增加这个函数,处理返回值
用js改变图片路径为新上传的路径,然后服务器端获的隐藏字段的值,即为新上传图片路径
上传页面时不能获得js更改后的image控件的属性值,所以添加一个隐藏字段。。。
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