我网站的“上载图像”部分中的图像预览在IE8 +浏览器中不起作用。但是在IE7和IE6中工作正常。我将下面的代码用于图像预览功能。
JS:

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

        }
    }
})();

CSS样式:
#imagePreview {
    width: 160px;
    height: 120px;
    float: right;
    filter: progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=scale);
}
</style>

HTML:
<html>
    <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>

此代码在IE 6和IE7中运行,但不在IE8 +中运行。任何人都知道上面代码中的问题是什么。运行示例链接:
https://developer.mozilla.org/files/3699/crossbrowser_image_preview.html

最佳答案

请检查这篇文章:
我已经测试过How to upload preview image before upload through JavaScript,必须做一件事:

IE8需要更改安全设置:Internet设置,安全性,自定义级别:

[]将文件上传到服务器时包括本地目录路径
()禁用
(o)启用

启用此选项后,您的演示可以在ie8中正常运行! https://developer.mozilla.org/files/3699/crossbrowser_image_preview.html
谢谢!

10-05 20:52
查看更多