当我选择下拉菜单项时，图像从文件上传控件中丢失.我们如何解决此问题? [英] Image is losted from file upload control when i selected dropdown item.How we solve this issue?

问题描述

当我选择下拉项时，图像从文件上传控件中丢失.我们如何解决此问题?

Image is losted from file upload control when i selected dropdown item.How we solve this issue??

推荐答案

图像从文件上传控件中丢失当我选择下拉菜单项
看起来下拉列表的AutoPostBack属性设置为"True".像这样设置后，选择下拉项后，页面就会回发.将属性设置为"False".您可以通过在页面加载中放置断点来跟踪执行情况.

Image is losted from file upload control when i selected dropdown item
Looks like AutoPostBack property of dropdown is set to ''True''. When this is set like this, as soon as you select a dropdown item, page will get a postback. Set the property to ''False''. You can track the execution by putting a breakpoint in your page load.

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