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读取input:file的路径并显示本地图片的方法

2015-09-11 15:19 603 查看

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plaincopy print ?

<!doctype html>

<html>

<head>

<meta content="text/html; charset=UTF-8" http-equiv="Content-Type" />

<title>Image preview example</title>

<script type="text/javascript">

var loadImageFile = (function () {

if (window.FileReader) {

var oPreviewImg = null, oFReader = new window.FileReader(),

rFilter = /^(?:image\/bmp|image\/cis\-cod|image\/gif|image\/ief|image\/jpeg|image\/jpeg|image\/jpeg|image\/pipeg|image\/png|image\/svg\+xml|image\/tiff|image\/x\-cmu\-raster|image\/x\-cmx|image\/x\-icon|image\/x\-portable\-anymap|image\/x\-portable\-bitmap|image\/x\-portable\-graymap|image\/x\-portable\-pixmap|image\/x\-rgb|image\/x\-xbitmap|image\/x\-xpixmap|image\/x\-xwindowdump)$/i;





oFReader.onload = function (oFREvent) {

if (!oPreviewImg) {

var newPreview = document.getElementById("imagePreview");

oPreviewImg = new Image();

oPreviewImg.style.width = (newPreview.offsetWidth).toString() + "px";

oPreviewImg.style.height = (newPreview.offsetHeight).toString() + "px";

newPreview.appendChild(oPreviewImg);

}

oPreviewImg.src = oFREvent.target.result;

};





return function () {

var aFiles = document.getElementById("imageInput").files;

if (aFiles.length === 0) { return; }

if (!rFilter.test(aFiles[0].type)) { alert("You must select a valid image file!"); return; }

oFReader.readAsDataURL(aFiles[0]);

}





}

if (navigator.appName === "Microsoft Internet Explorer") {

return function () {

alert(document.getElementById("imageInput").value);

document.getElementById("imagePreview").filters.item("DXImageTransform.Microsoft.AlphaImageLoader").src = document.getElementById("imageInput").value;





}

}

})();

</script>

<style type="text/css">

#imagePreview {

width: 160px;

height: 120px;

filter: progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=scale);

}

</style>

</head>

<body>

<div id="imagePreview">

</div>

<form name="uploadForm">

<p>

<input id="imageInput" type="file" name="myPhoto" onchange="loadImageFile();" /><br />

<input type="submit" value="Send" /></p>

</form>

</body>

</html>

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