我正在尝试通过带有表单数据的表单上传 pdf 文件，并且正在以下浏览器下测试功能：edge 和 internet explorer。我使用 FileApi，我的方法在 edge 和 IE11 和 IE10 下有效，但在 IE 下无效<10, I read that FileApi is no longer supported under IE<10. The goal is to test where the formdata can be used under internet explorer. The usefulness is to try to print a pdf file with the formdata, and that it works under edge, IE11, IE10, IE<10 as far as possible.
HTML
<body>
<form name="pocform" id="pocform" enctype="multipart/form-data">
<div class="panel-body">
<input id="uploadfile" name="uploadfile" type="file" value="" size="60"/><br/>
<input type="button" class="btn btn-primary" value="Upload" id="uploadButton" name="uploadButton" onclick="onClickImpression()"/>
</div>
</form>
</body>JS
<script type="text/javascript">
function onClickImpression() {
var fileElement = document.forms[0].uploadfile.files; //works in Edge, IE11 and IE10, not in IE<10
var file = fileElement[0];
var formData = new FormData();
formData.append('uploadfile', file);
try {
req.open("POST", url, false);
req.send(formData);
}
catch (e) {
alert(e.toString());
}
}
</script> 在 IE 中是否有等效项<10 to this:
var fileElement = document.forms[0].uploadfile.files;
我试试这个，但在 IE 中不起作用<10
document.getElementById('uploadfile').files;
谢谢。