![兼容ie[6-9] 火狐 Chrome opera maxthon3 360浏览器的js本地图片预览](https://1000zi.500zi.com/uploadfile/img/15/247/6098847d544c1e1ef3d5c0a387634998.jpg)
html代码
<div id="divPreview">
<img id="imgHeadPhoto" src="Images/Headphoto/noperson.jpg" style="width: 160px; height: 170px;border: solid 1px #d2e2e2;" alt="" />
</div>
<asp:FileUpload ID="fuHeadPhoto" runat="server" οnchange="PreviewImage(this,'imgHeadPhoto','divPreview')" size="20" />
将网上的js本地图片预览整合了一下，希望对大家有用，如有其他浏览器不兼容且有解决办法，请给我留言，我将及时更新本文代码。
javascript代码
//js本地图片预览，兼容ie[6-9]、火狐、Chrome17+、Opera11+、Maxthon3、360浏览器function PreviewImage(fileObj,imgPreviewId,divPreviewId){var allowExtention=".jpg,.bmp,.gif,.png";//允许上传文件的后缀名document.getElementById("hfAllowPicSuffix").value;var extention=fileObj.value.substring(fileObj.value.lastIndexOf(".")+1).toLowerCase(); var browserVersion= window.navigator.userAgent.toUpperCase();if(allowExtention.indexOf(extention)>-1){ if(fileObj.files){//兼容chrome、火狐7+、360浏览器5.5+等，应该也兼容ie10，HTML5实现预览if(window.FileReader){var reader = new FileReader(); reader.onload = function(e){document.getElementById(imgPreviewId).setAttribute("src",e.target.result);} reader.readAsDataURL(fileObj.files[0]);}else if(browserVersion.indexOf("SAFARI")>-1){alert("不支持Safari浏览器6.0以下版本的图片预览!");}}else if (browserVersion.indexOf("MSIE")>-1){//ie、360低版本预览if(browserVersion.indexOf("MSIE 6")>-1){//ie6document.getElementById(imgPreviewId).setAttribute("src",fileObj.value);}else{//ie[7-9]fileObj.select();if(browserVersion.indexOf("MSIE 9")>-1)fileObj.blur();//不加上document.selection.createRange().text在ie9会拒绝访问var newPreview =document.getElementById(divPreviewId+"New");if(newPreview==null){newPreview =document.createElement("div");newPreview.setAttribute("id",divPreviewId+"New");newPreview.style.width = document.getElementById(imgPreviewId).width+"px";newPreview.style.height = document.getElementById(imgPreviewId).height+"px";newPreview.style.border="solid 1px #d2e2e2";}newPreview.style.filter="progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod='scale',src='" + document.selection.createRange().text + "')"; var tempDivPreview=document.getElementById(divPreviewId);tempDivPreview.parentNode.insertBefore(newPreview,tempDivPreview);tempDivPreview.style.display="none";}}else if(browserVersion.indexOf("FIREFOX")>-1){//firefoxvar firefoxVersion= parseFloat(browserVersion.toLowerCase().match(/firefox\/([\d.]+)/)[1]);if(firefoxVersion<7){//firefox7以下版本document.getElementById(imgPreviewId).setAttribute("src",fileObj.files[0].getAsDataURL());}else{//firefox7.0+document.getElementById(imgPreviewId).setAttribute("src",window.URL.createObjectURL(fileObj.files[0]));}}else{document.getElementById(imgPreviewId).setAttribute("src",fileObj.value);} }else{alert("仅支持"+allowExtention+"为后缀名的文件!");fileObj.value="";//清空选中文件if(browserVersion.indexOf("MSIE")>-1){ fileObj.select();document.selection.clear();}fileObj.outerHTML=fileObj.outerHTML;}}
整个测试代码：图片自己添加
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html><head><title></title></head><body><div id="divPreview"><img id="imgHeadPhoto" src="noperson.jpg" style="width: 160px; height: 170px; border: solid 1px #d2e2e2;" alt="" /></div><input type="file" onchange="PreviewImage(this,'imgHeadPhoto','divPreview')" size="20"/><script type="text/javascript">//js本地图片预览，兼容ie[6-9]、火狐、Chrome17+、Opera11+、Maxthon3function PreviewImage(fileObj,imgPreviewId,divPreviewId){var allowExtention=".jpg,.bmp,.gif,.png";//允许上传文件的后缀名document.getElementById("hfAllowPicSuffix").value;var extention=fileObj.value.substring(fileObj.value.lastIndexOf(".")+1).toLowerCase(); var browserVersion= window.navigator.userAgent.toUpperCase();if(allowExtention.indexOf(extention)>-1){ if(fileObj.files){//HTML5实现预览，兼容chrome、火狐7+等if(window.FileReader){var reader = new FileReader(); reader.onload = function(e){document.getElementById(imgPreviewId).setAttribute("src",e.target.result);} reader.readAsDataURL(fileObj.files[0]);}else if(browserVersion.indexOf("SAFARI")>-1){alert("不支持Safari6.0以下浏览器的图片预览!");}}else if (browserVersion.indexOf("MSIE")>-1){if(browserVersion.indexOf("MSIE 6")>-1){//ie6document.getElementById(imgPreviewId).setAttribute("src",fileObj.value);}else{//ie[7-9]fileObj.select();if(browserVersion.indexOf("MSIE 9")>-1)fileObj.blur();//不加上document.selection.createRange().text在ie9会拒绝访问var newPreview =document.getElementById(divPreviewId+"New");if(newPreview==null){newPreview =document.createElement("div");newPreview.setAttribute("id",divPreviewId+"New");newPreview.style.width = document.getElementById(imgPreviewId).width+"px";newPreview.style.height = document.getElementById(imgPreviewId).height+"px";newPreview.style.border="solid 1px #d2e2e2";}newPreview.style.filter="progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod='scale',src='" + document.selection.createRange().text + "')"; var tempDivPreview=document.getElementById(divPreviewId);tempDivPreview.parentNode.insertBefore(newPreview,tempDivPreview);tempDivPreview.style.display="none";}}else if(browserVersion.indexOf("FIREFOX")>-1){//firefoxvar firefoxVersion= parseFloat(browserVersion.toLowerCase().match(/firefox\/([\d.]+)/)[1]);if(firefoxVersion<7){//firefox7以下版本document.getElementById(imgPreviewId).setAttribute("src",fileObj.files[0].getAsDataURL());}else{//firefox7.0+document.getElementById(imgPreviewId).setAttribute("src",window.URL.createObjectURL(fileObj.files[0]));}}else{document.getElementById(imgPreviewId).setAttribute("src",fileObj.value);} }else{alert("仅支持"+allowExtention+"为后缀名的文件!");fileObj.value="";//清空选中文件if(browserVersion.indexOf("MSIE")>-1){ fileObj.select();document.selection.clear();}fileObj.outerHTML=fileObj.outerHTML;}}</script></body></html>
-7-2
1.更新原来newPreview.style.width =document.getElementById(imgPreviewId).style.width为document.getElementById(imgPreviewId).width+"px";
-7-4
1.更新兼容ie9浏览器、兼容360浏览器5.5+
