我正在尝试在访问者提交经过验证的选择加入表单时创建自动文件下载。我想使用 Javascript 函数作为 onsubmit() 事件来启动下载。这是我正在使用的代码 我已经在使用表单 action= 将表单数据提交到数据库并且已经有 Javascript 来验证表单。我只需要添加下载功能即可。
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE html
PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" >
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<style type="text/css" xml:space="preserve">
BODY, P,TD{ font-family: Arial,Verdana,Helvetica, sans-serif; font-size: 10pt }
A{font-family: Arial,Verdana,Helvetica, sans-serif;}
B { font-family : Arial, Helvetica, sans-serif; font-size : 12px;font-
weight
: bold;}
.error_strings{ font-family:Verdana; font-size:14px; color:#660000;}
</style>
<script type="text/javascript" src="http://code.jquery.com/jquery-1.4.2.min.js">
</script>
<script type="text/javascript"
src="https://ajax.googleapis.com/ajax/libs/jquery/1.6.4/jquery.min.js"></script>
<script language="JavaScript" src="gen_validatorv4.js"
type="text/javascript" xml:space="preserve"></script>
<script type="text/javascipt">
var downloadURL = function downloadURL(url) {
var iframe;
var hiddenIFrameID = 'hiddenDownloader';
iframe = document.getElementById(hiddenIFrameID);
if (iframe === null) {
iframe = document.createElement('iframe');
iframe.id = hiddenIFrameID;
iframe.style.display = 'none';
document.body.appendChild(iframe);
}
iframe.src = 'http://healthyweightnaturally.com/file-download/download.php?
download_file=integrative_nutrition_ebook.pdf';
}
</script>
</head>
<body>
<form name="myform" id="myform" method="post"
action="https://www.example.com/FormHTML.aspx" onSubmit="return downloadURL(url);">
<table cellspacing="2" cellpadding="2" border="0">
<tr>
<td align="right">
First Name
</td>
<td>
<input type="text" name="FirstName" />
</td>
</tr>
<tr>
<td align="right">
Last Name
</td>
<td>
<input type="text" name="LastName" />
</td>
</tr>
<tr>
<td align="right">
Email *
</td>
<td>
<input type="text" name="Email" />
</td>
</tr>
<tr>
<td align="right"></td>
<td>
<div id="myform_errorloc" class="error_strings">
</div>
</td>
</tr>
<tr>
<td align="right"></td>
<td>
<input style="padding-left:10px;" src="http://healthyweightnaturally.com/file-
download/download-button.png" type="image" value="submit" value="Submit" />
</td>
</tr>
</table>
<div style="visibility:hidden">
<iframe name="ifr1" width="20" height="20" id="hiddenIFrameID"></iframe>
</div>
</form>
<script language="JavaScript" type="text/javascript"
xml:space="preserve">//<![CDATA[
//You should create the validator only after the definition of the HTML form
var frmvalidator = new Validator("myform");
frmvalidator.EnableOnPageErrorDisplaySingleBox();
frmvalidator.EnableMsgsTogether();
frmvalidator.addValidation("FirstName","req","Please enter your First Name");
frmvalidator.addValidation("FirstName","maxlen=20", "Max length for FirstName
is 20");
frmvalidator.addValidation("FirstName","alpha_s","Name can contain alphabetic chars
only");
frmvalidator.addValidation("LastName","req","Please enter your Last Name");
frmvalidator.addValidation("LastName","maxlen=20","For LastName, Max length is 20");
frmvalidator.addValidation("Email","maxlen=50");
frmvalidator.addValidation("Email","req");
frmvalidator.addValidation("Email","email");
//]]>
</script>
</body>
</html>
我想使用 onsubmit 而不是 onclick 因为我需要确保在能够下载文件之前已经验证了表单。
我对 Javascript 有点陌生，并且一直在努力解决这个问题。我将不胜感激有人的帮助。我发现最接近答案的东西可以在 HTML OnSubmit: Download OR HTML 看到。 ，但由于他们从未提供任何代码示例，因此无法帮助我找到解决方案。
最佳答案
您可以使用 jQuery 插件 http://jqueryfiledownload.apphb.com/ ，我在这里找到了 Download File Using Javascript/jQuery .
关于javascript - 使用 Javascript 和 onSubmit 自动下载文件，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/13803369/