<head runat="server">
<title>图片上传及预览(兼容ie6/7/8 firefox/chrome)</title>
<script src="../Scripts/jquery-1.4.2.min.js" type="text/javascript"></script>
</head>
<body>
<form id="form1" runat="server">
<div>
<div>
<asp:FileUpload ID="fileAppImg" runat="server" Style="font-size: 13px;" onchange="previewImage(this,‘preview‘,‘appImg‘)" /></div>
<div id="preview" style="margin-top: 10px;">
<img id="appImg" src="../SourceImg/ContentPage/AccountAuth/zjyl.jpg" alt="" style="margin-left: 1px;
height: 214px; width: 160px;" />
</div>
</div>
</form>
</body>
</html>
<%--图片上传预览--%>
<script type="text/javascript">
//图片上传预览
function previewImage(file, div, img) {
MAXWIDTH = 160;
MAXHEIGHT = 214;
var div = document.getElementById(div);
if (file.files && file.files[0]) {
//验证图片大小
var imgType = /\.[^\.]+$/.exec(file.value);
if (imgType != ".jpg" && imgType != ".png") {
alert("仅支持jpg和png两种格式的图片");
file.value = "";
$("#txtShowIcon").val("未选中文件");
return;
}
div.innerHTML = "<img id=‘" + img + "‘>";
var img = document.getElementById(img);
img.onload = function () {
var rect = clacImgZoomParam(MAXWIDTH, MAXHEIGHT, img.offsetWidth, img.offsetHeight);
img.width = rect.width;
img.height = rect.height;
img.style.marginLeft = rect.left + ‘px‘;
img.style.marginTop = rect.top + ‘px‘;
}
var reader = new FileReader();
reader.onload = function (evt) { img.src = evt.target.result; }
reader.readAsDataURL(file.files[0]);
}
else {
//验证图片大小
var imgType = /\.[^\.]+$/.exec(file.value);
if (imgType != ".jpg" && imgType != ".png") {
alert("仅支持jpg和png两种格式的图片");
return;
}
var filePath = file.value;
//IE浏览器
var sFilter = ‘filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=scale,src="‘;
file.select();
var src = document.selection.createRange().text;
div.innerHTML = ‘<img id="‘ + img + ‘">‘;
var img = document.getElementById(img);
//img.filters.item(‘DXImageTransform.Microsoft.AlphaImageLoader‘).src = src;
var rect = clacImgZoomParam(MAXWIDTH, MAXHEIGHT, img.offsetWidth, img.offsetHeight);
status = (‘rect:‘ + rect.top + ‘,‘ + rect.left + ‘,‘ + rect.width + ‘,‘ + rect.height);
div.innerHTML = "<div id=‘divhead‘ style=‘width:" + rect.width + "px;height:" + rect.height + "px;margin-top:" + rect.top + "px;margin-left:" + rect.left + "px;" + sFilter + src + "\"‘></div>";
}
}
function clacImgZoomParam(maxWidth, maxHeight, width, height) {
var param = { top: 0, left: 0, width: width, height: height };
param.width = maxWidth;
param.height = maxHeight;
param.left = 0;
param.top = 0;
return param;
}
</script>
时间： 2024-08-04 03:30:43