Java脚本文件控制 [英] java script file control
问题描述
我正在建立一个文件上传站点，在该站点中，如果用户两次选择相同的文件，那么我想通过javascript清除该值，
如何将html文件控件的路径更改为null.
谢谢&问候
i am building a file uploading site ,in which if user select same file twice then i want to clear that value by javascript,
how can i change html file control''s path to null.
thanks & Regards
推荐答案
您可以使用以下命令清除上传文件的值:
You can clear upload file value using following:
document.getElementById('<%=fluUpload.ClientID%>').value='';
调用以ConrolID作为参数的javascript函数
call floowing javascript function with ConrolID as parameter
<script type="text/javascript">
function clearFileInput( id )
{
var elem = document.getElementById( id );
elem.parentNode.innerHTML = "";
}
</script>
我尝试了一些符合您要求的代码.试试这个
Hi,
I tried some code for your requirement.Try this
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<script src="Scripts/jquery-1.4.1-vsdoc.js" type="text/javascript"></script>
<script src="Scripts/jquery-1.4.1.js" type="text/javascript"></script>
<script language ="javascript" >
function f1() {
document.getElementById("fileupload1").parentElement.innerHTML = "<input type =\"file\" id=\"fileupload1\" />";
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<div id="divid" runat="server">
<input type ="file" id="fileupload1" />
</div>
<input type ="button" value="change" onclick ="f1()" />
<asp:button id="Button1" runat="server" text="Button" onclientclick="f1()" onclick="Button1_Click" xmlns:asp="#unknown" />
</div>
</form>
</body>
</html>
希望它也能为您服务.
我搜索了很多，但找不到正确的解决方案，因为.
如果我们更改文件类型输入标签，则会导致某些安全漏洞.
终于我尝试了这段代码.希望您能理解我说的话
如果使用Jquery，则可以在服务器端检查用户上传的文件.
最好的
I hope It can works for you also.
I searched alot but i don''t find correct solution because.
If we change file type input tags it leads to some security breaches .
finally I tried this code .I hope you understood what I said
If you use Jquery Then you can check user uploaded files in server side.
All the Best
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