如何从文件上传器中侦听取消事件 [英] How to listen cancel event from a file uploader

问题描述

//事情如下：

//在Chrome中：首先我单击浏览并选择一个文件，然后再次单击浏览然后再按

/ / cancel，文件上传器清除。 （但这不会发生在IE中）



//为此，我需要知道，在文件上传中按下了哪个按钮（确定/取消）

//对话框



//这是我的JS



< pre lang =Javascript>< script type = text / javascript>

function clear（）{
if （$ .browser .msie）{

// 清除文件上传者

var who = document .getElementsByName（ ' <％= fileID.UniqueID％>'）[ 0 ];
who.value = ;
var who2 = who.cloneNode（ false ）;
who2.onchange = who.onchange;
who.parentNode.replaceChild（who2，who）;

// =========
}
}

< / script>

// Html

 <   div     id   =  upload-area >  
 <   asp：FileUpload     ID   =  fileID    runat   = 服务器   宽度  =  427px    onclick   =  clear（）  /  >  
 
 <   / div  >  

解决方案

.browser.msie）{

/ / 清除文件上传者

var who = < span class =code-sdkkeyword> document .getElementsByName（' <％= fileID.UniqueID ％>'）[ 0 ];
who.value = ;
var who2 = who.cloneNode（ false ）;
who2.onchange = who.onchange;
who.parentNode.replaceChild（who2，who）;

// =========
}
}

< / script>

// Html

 <   div     id   =  upload-area >  
 <   asp：FileUpload     ID   =  fileID    runat   = 服务器   宽度  =  427px    onclick   =  clear（）  /  >  
 
 <   / div  >  

嗨Kingshuk，

引用：

我需要知道，在文件上传中按下了哪个按钮（确定/取消）

你不能直接这样做。因为文件对话框没有暴露给浏览器。



我搜索了这个并得到了一个不同的方法。这不是直接的，但通过这种方式你可以得到你的解决方案。



链接 - http://jsfiddle.net/Shiboe/yuK3r/6/ [ ^ ]

我也得到了这个，但它不是我需要的方式..

//The thing is like :
// In chrome : First I click browse and select a file, then again, if I click browse and then
// cancel, the file uploader get cleared. (but that doesn't happen in IE)

// for that, I need to know, which button (OK / Cancel) is being pressed in the file upload
// dialog box

//Here's my JS

<script type="text/javascript">
    
    function clear() {
        if ($.browser.msie) {
            
            //To clear the file uploader

            var who = document.getElementsByName('<%= fileID.UniqueID %>')[0];
            who.value = "";
            var who2 = who.cloneNode(false);
            who2.onchange = who.onchange;
            who.parentNode.replaceChild(who2, who);

            //=========
        }
    }

</script>

// Html

<div id="upload-area">
                                <asp:FileUpload ID="fileID" runat="server" Width="427px" onclick="clear()"/>                               
                                
                            </div>

解决方案

.browser.msie) { //To clear the file uploader var who = document.getElementsByName('<%= fileID.UniqueID %>')[0]; who.value = ""; var who2 = who.cloneNode(false); who2.onchange = who.onchange; who.parentNode.replaceChild(who2, who); //========= } } </script>

// Html

<div id="upload-area">
                                <asp:FileUpload ID="fileID" runat="server" Width="427px" onclick="clear()"/>                               
                                
                            </div>

Hi Kingshuk,

Quote:

I need to know, which button (OK / Cancel) is being pressed in the file upload

You can't do it directly. As file dialog is not exposed to the browser.

I have searched for this and got a different approach to it. Here it is not direct, but in this way you can get your solution.

Link - http://jsfiddle.net/Shiboe/yuK3r/6/[^]

I also got this, but its not the way I need..

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