ajax无刷新上传文件
1. <script src="@Url.Content("~/Scripts/ajaxfileupload.js")" type="text/javascript"></script>
<link href="@Url.Content("~/Content/css/jquery.Jcrop.css")" rel="stylesheet" type="text/css" />
<script src="@Url.Content("~/Scripts/jquery.Jcrop.min.js")" type="text/javascript"></script>
<script src="@Url.Content("~/Scripts/JS/ImageSet.js")" type="text/javascript"></script>
2. <input type="hidden" name="hdnImageKey" id="hdnImageKey" />
<tr>
<td class="td-right">
新闻图片：
</td>
<td class="td-left">
<span id="imgNewsSpan">
</span>
<input type="button" id="uploadImage" class="button" value="上传图片" />
<input type="button" id="delImage" class="button" value="删除图片" style="display:none;" />
</td>
</tr>
<div id="uploadDiv" class="dialog">
</div>
<div id="uploadImg">
选择图片：<input type="file" id="fileImg" name="fileImg" /><br />
仅支持JPG、JPEG、PNG、GIF格式（2M以下）
</div>
3.ImageSet.js
//绑定上传控件
$("#fileImg").live("change", function () {
var myfile = $("#fileImg").val();
if (myfile == "") {
alert("请选择要上传的图片");
return;
}
$("#uploadImg").hide();
$("#uploadingDiv").show();
$.ajaxFileUpload({
url: '/ImageSet/UploadImg', //提交处理的页面
secureuri: false,
fileElementId: 'fileImg', //上传控件的id
name: myfile,
dataType: 'text/html', //数据格式
success: function (result, status) {
var data = eval("(" + result + ")");
var msg = data.msg;
if (data.result == "0") {
alert(msg);
}
else {
var src = "/Content/TempImages/" + msg;
$("#targetSpan").empty().append('<img id="target" width="450px" height="450px" alt="" />');
$("#previewSpan").empty().append('<img width="150" height="150" id="preview" alt="" />');
$("#target").attr("src", src).load(function () {
$("#uploadingDiv").hide();
$("#setImg").slideDown("fast", function () {
//绑定切割图片
jQuery('#target').Jcrop({
onChange: showPreview,
onSelect: showPreview,
aspectRatio: 1,
minSize: [150, 150]
}, function () {
// Use the API to get the real image size
var bounds = this.getBounds();
boundx = bounds[0];
boundy = bounds[1];
this.setSelect([300, 300, 150, 150]);
//Store the API in the jcrop_api variable
jcrop_api = this;
});
});
});
$("#preview").attr("src", src);
$("#targetURL").val(src);
}
}, error: function (result, status, e) {
$("#uploadImg").show();
$("#uploadingDiv").hide();
alert("上传失败！");
}
});
return false;
});
ajaxfileupload.js
// JavaScript Document
jQuery.extend({
createUploadIframe: function (id, uri) {
//create frame
var frameId = 'jUploadFrame' + id;
if (window.ActiveXObject) {
var io = document.createElement("iframe"); // document.createElement('<iframe id="' + frameId + '" name="' + frameId + '" />');
io.setAttribute("id", frameId);
io.setAttribute("name", frameId);
if (typeof uri == 'boolean') {
// io.src = 'javascript:false';
io.setAttribute("src", "javascript:false");
}
else if (typeof uri == 'string') {
//io.src = uri;
io.setAttribute("src", uri);
}
}
else {
var io = document.createElement('iframe');
io.setAttribute("id", frameId);
io.setAttribute("name", frameId);
// io.id = frameId;
// io.name = frameId;
}
// io.style.position = 'absolute';
// io.style.top = '-1000px';
// io.style.left = '-1000px';
io.setAttribute("style", "position:absolute;top:-1000px;left:-1000px;");
document.body.appendChild(io);
return io;
},
createUploadForm: function (id, fileElementId) {
//create form
var formId = 'jUploadForm' + id;
var fileId = 'jUploadFile' + id;
var form = jQuery('<form action="" method="POST" name="' + formId + '" id="' + formId + '" enctype="multipart/form-data"></form>');
var oldElement = jQuery('#' + fileElementId);
var newElement = jQuery(oldElement).clone();
jQuery(oldElement).attr('id', fileId);
jQuery(oldElement).before(newElement);
jQuery(oldElement).appendTo(form);
//set attributes
jQuery(form).css('position', 'absolute');
jQuery(form).css('top', '-1200px');
jQuery(form).css('left', '-1200px');
jQuery(form).appendTo('body');
return form;
},
ajaxFileUpload: function (s) {
// TODO introduce global settings, allowing the client to modify them for all requests, not only timeout
s = jQuery.extend({}, jQuery.ajaxSettings, s);
var id = s.fileElementId;
var form = jQuery.createUploadForm(id, s.fileElementId);
var io = jQuery.createUploadIframe(id, s.secureuri);
var frameId = 'jUploadFrame' + id;
var formId = 'jUploadForm' + id;
if (s.global && !jQuery.active++) {
// Watch for a new set of requests
jQuery.event.trigger("ajaxStart");
}
var requestDone = false;
// Create the request object
var xml = {};
if (s.global) {
jQuery.event.trigger("ajaxSend", [xml, s]);
}
var uploadCallback = function (isTimeout) {
// Wait for a response to come back
var io = document.getElementById(frameId);
try {
if (io.contentWindow) {
xml.responseText = io.contentWindow.document.body ? io.contentWindow.document.body.innerHTML : null;
xml.responseXML = io.contentWindow.document.XMLDocument ? io.contentWindow.document.XMLDocument : io.contentWindow.document;
} else if (io.contentDocument) {
xml.responseText = io.contentDocument.document.body ? io.contentDocument.document.body.innerHTML : null;
xml.responseXML = io.contentDocument.document.XMLDocument ? io.contentDocument.document.XMLDocument : io.contentDocument.document;
}
} catch (e) {
jQuery.handleError(s, xml, null, e);
}
if (xml || isTimeout == "timeout") {
requestDone = true;
var status;
try {
status = isTimeout != "timeout" ? "success" : "error";
// Make sure that the request was successful or notmodified
if (status != "error") {
// process the data (runs the xml through httpData regardless of callback)
var data = jQuery.uploadHttpData(xml, s.dataType);
if (s.success) {
// ifa local callback was specified, fire it and pass it the data
s.success(data, status);
};
if (s.global) {
// Fire the global callback
jQuery.event.trigger("ajaxSuccess", [xml, s]);
};
} else {
jQuery.handleError(s, xml, status);
}
} catch (e) {
status = "error";
jQuery.handleError(s, xml, status, e);
};
if (s.global) {
// The request was completed
jQuery.event.trigger("ajaxComplete", [xml, s]);
};
// Handle the global AJAX counter
if (s.global && ! --jQuery.active) {
jQuery.event.trigger("ajaxStop");
};
if (s.complete) {
s.complete(xml, status);
};
jQuery(io).unbind();
setTimeout(function () {
try {
jQuery(io).remove();
jQuery(form).remove();
} catch (e) {
jQuery.handleError(s, xml, null, e);
}
}, 100);
xml = null;
};
}
// Timeout checker
if (s.timeout > 0) {
setTimeout(function () {
if (!requestDone) {
// Check to see ifthe request is still happening
uploadCallback("timeout");
}
}, s.timeout);
}
try {
var form = jQuery('#' + formId);
jQuery(form).attr('action', s.url);
jQuery(form).attr('method', 'POST');
jQuery(form).attr('target', frameId);
if (form.encoding) {
form.encoding = 'multipart/form-data';
}
else {
form.enctype = 'multipart/form-data';
}
jQuery(form).submit();
} catch (e) {
jQuery.handleError(s, xml, null, e);
}
if (window.attachEvent) {
document.getElementById(frameId).attachEvent('onload', uploadCallback);
}
else {
document.getElementById(frameId).addEventListener('load', uploadCallback, false);
}
return { abort: function () { } };
},
uploadHttpData: function (r, type) {
var data = !type;
data = type == "xml" || data ? r.responseXML : r.responseText;
// ifthe type is "script", eval it in global context
if (type == "script") {
jQuery.globalEval(data);
}
// Get the JavaScript object, ifJSON is used.
if (type == "json") {
eval("data = " + data);
}
// evaluate scripts within html
if (type == "html") {
jQuery("<div>").html(data).evalScripts();
}
return data;
}
});