读取input:file的路径并显示本地图片的方法

  1. <!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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