需要上传图片的一个操作选择了WebUploader这个插件来实现,具体的实现过程如下。
js代码:
1、引入js、css文件:
2、上传代码:
(function ($) { // 当domReady的时候开始初始化 $(function () { var $wrap = $('.uploader-list-container'), // 图片容器 $queue = $('
' + file.name + '
' + '' + '' + '
' +
'删除' +
'向右旋转' +
'向左旋转
').appendTo($li),
$prgress = $li.find('p.progress span'),
$wrap = $li.find('p.imgWrap'),
$info = $(''),
showError = function (code) {
switch (code) {
case 'exceed_size':
text = '文件大小超出';
break;
case 'interrupt':
text = '上传暂停';
break;
default:
text = '上传失败,请重试';
break;
}
$info.text(text).appendTo($li);
};
if (file.getStatus() === 'invalid') {
showError(file.statusText);
} else {
//todo lazyload
$wrap.text('预览中');
uploader.makeThumb(file, function (error, src) {
var img;
if (error) {
$wrap.text('不能预览');
return;
}
if (isSupportBase64) {
img = $('');
$wrap.empty().append(img);
} else {
$.ajax('/House/UploadPic', {
method: 'POST',
data: src,
dataType: 'json'
}).done(function (response) {
if (response.result) {
img = $('');
$wrap.empty().append(img);
} else {
$wrap.text("预览出错");
}
});
}
}, thumbnailWidth, thumbnailHeight);
percentages[file.id] = [file.size, 0];
file.rotation = 0;
}
file.on('statuschange', function (cur, prev) {
if (prev === 'progress') {
$prgress.hide().width(0);
} else if (prev === 'queued') {
$li.off('mouseenter mouseleave');
$btns.remove();
}
// 成功
if (cur === 'error' || cur === 'invalid') {
console.log(file.statusText);
showError(file.statusText);
percentages[file.id][1] = 1;
} else if (cur === 'interrupt') {
showError('interrupt');
} else if (cur === 'queued') {
percentages[file.id][1] = 0;
} else if (cur === 'progress') {
$info.remove();
$prgress.css('display', 'block');
} else if (cur === 'complete') {
$li.append('');
}
$li.removeClass('state-' + prev).addClass('state-' + cur);
});
$li.on('mouseenter', function () {
$btns.stop().animate({ height: 30 });
});
$li.on('mouseleave', function () {
$btns.stop().animate({ height: 0 });
});
$btns.on('click', 'span', function () {
var index = $(this).index(),
deg;
switch (index) {
case 0:
uploader.removeFile(file);
return;
case 1:
file.rotation += 90;
break;
case 2:
file.rotation -= 90;
break;
}
if (supportTransition) {
deg = 'rotate(' + file.rotation + 'deg)';
$wrap.css({
'-webkit-transform': deg,
'-mos-transform': deg,
'-o-transform': deg,
'transform': deg
});
} else {
$wrap.css('filter', 'progid:DXImageTransform.Microsoft.BasicImage(rotation=' + (~~((file.rotation / 90) % 4 + 4) % 4) + ')');
// use jquery animate to rotation
// $({
// rotation: rotation
// }).animate({
// rotation: file.rotation
// }, {
// easing: 'linear',
// step: function( now ) {
// now = now * Math.PI / 180;
// var cos = Math.cos( now ),
// sin = Math.sin( now );
// $wrap.css( 'filter', "progid:DXImageTransform.Microsoft.Matrix(M11=" + cos + ",M12=" + (-sin) + ",M21=" + sin + ",M22=" + cos + ",SizingMethod='auto expand')");
// }
// });
}
});
$li.appendTo($queue);
}
// 负责view的销毁
function removeFile(file) {
var $li = $('#' + file.id);
delete percentages[file.id];
updateTotalProgress();
$li.off().find('.file-panel').off().end().remove();
}
function updateTotalProgress() {
var loaded = 0,
total = 0,
spans = $progress.children(),
percent;
$.each(percentages, function (k, v) {
total += v[0];
loaded += v[0] * v[1];
});
percent = total ? loaded / total : 0;
spans.eq(0).text(Math.round(percent * 100) + '%');
spans.eq(1).css('width', Math.round(percent * 100) + '%');
updateStatus();
}
function updateStatus() {
var text = '', stats;
if (state === 'ready') {
text = '选中' + fileCount + '张图片,共' +
WebUploader.formatSize(fileSize) + '。';
} else if (state === 'confirm') {
stats = uploader.getStats();
if (stats.uploadFailNum) {
text = '已成功上传' + stats.successNum + '张照片至XX相册,' +
stats.uploadFailNum + '张照片上传失败,重新上传失败图片或忽略'
}
} else {
stats = uploader.getStats();
text = '共' + fileCount + '张(' +
WebUploader.formatSize(fileSize) +
'),已上传' + stats.successNum + '张';
if (stats.uploadFailNum) {
text += ',失败' + stats.uploadFailNum + '张';
}
}
$info.html(text);
}
function setState(val) {
var file, stats;
if (val === state) {
return;
}
$upload.removeClass('state-' + state);
$upload.addClass('state-' + val);
state = val;
switch (state) {
case 'pedding':
$placeHolder.removeClass('element-invisible');
$queue.hide();
$statusBar.addClass('element-invisible');
uploader.refresh();
break;
case 'ready':
$placeHolder.addClass('element-invisible');
$('#filePicker2').removeClass('element-invisible');
$queue.show();
$statusBar.removeClass('element-invisible');
uploader.refresh();
break;
case 'uploading':
$('#filePicker2').addClass('element-invisible');
$progress.show();
$upload.text('暂停上传');
break;
case 'paused':
$progress.show();
$upload.text('继续上传');
break;
case 'confirm':
$progress.hide();
$('#filePicker2').removeClass('element-invisible');
$upload.text('开始上传');
stats = uploader.getStats();
if (stats.successNum && !stats.uploadFailNum) {
setState('finish');
return;
}
break;
case 'finish':
stats = uploader.getStats();
if (stats.successNum) {
alert('上传成功');
} else {
// 没有成功的图片,重设
state = 'done';
location.reload();
}
break;
}
updateStatus();
}
uploader.onUploadProgress = function (file, percentage) {
var $li = $('#' + file.id),
$percent = $li.find('.progress span');
$percent.css('width', percentage * 100 + '%');
percentages[file.id][1] = percentage;
updateTotalProgress();
};
uploader.onFileQueued = function (file) {
fileCount++;
fileSize += file.size;
if (fileCount === 1) {
$placeHolder.addClass('element-invisible');
$statusBar.show();
}
addFile(file);
setState('ready');
updateTotalProgress();
};
uploader.onFileDequeued = function (file) {
fileCount--;
fileSize -= file.size;
if (!fileCount) {
setState('pedding');
}
removeFile(file);
updateTotalProgress();
};
uploader.on('all', function (type) {
var stats;
switch (type) {
case 'uploadFinished':
setState('confirm');
break;
case 'startUpload':
setState('uploading');
break;
case 'stopUpload':
setState('paused');
break;
}
});
uploader.onError = function (code) {
alert('Eroor: ' + code);
};
$upload.on('click', function () {
if ($(this).hasClass('disabled')) {
return false;
}
if (state === 'ready') {
uploader.upload();
} else if (state === 'paused') {
uploader.upload();
} else if (state === 'uploading') {
uploader.stop();
}
});
$info.on('click', '.retry', function () {
uploader.retry();
});
$info.on('click', '.ignore', function () {
alert('todo');
});
$upload.addClass('state-' + state);
updateTotalProgress();
});
})(jQuery);
3、坑1:上传地址配置在 WebUploader.create 中的 server 属性中
4、坑2:提交到服务器端的图片必须有一个houseId,该数据配置在WebUploader.create 中formData属性中
5、坑3:如果上传成功,则与服务器的交互定义方式:
uploader.on('uploadSuccess', function (file, response) { if (response.status!="Ok") { alert(response.errorMsg); showError(response.errorMsg); } });
6、服务器的接收:
public ActionResult UploadPic(long houseId, HttpPostedFileBase file) { string cacleFileName = CacleMD5.CalcMD5(file.InputStream); string ext = Path.GetExtension(file.FileName); string path = "/upload/" + DateTime.Now.ToString("yyyy/MM/dd") + "/" + cacleFileName + ext; string fullPath = HttpContext.Server.MapPath("~" + path);//拿到服务器上的绝对路径。 new FileInfo(fullPath).Directory.Create();//尝试创建可能不存在的文件夹 file.InputStream.Position = 0;//指针复位 file.SaveAs(fullPath); houseSer.AddNewHousePic(new HousePicDTO { HouseId = houseId, Url = path, ThumbUrl = path }); //将文件保存,保存到该系统的根目录下,以HouseId为文件名。 //file.SaveAs(HttpContext.Server.MapPath("~/" + houseId + Path.GetExtension(file.FileName))); // return Content("ok"); return Json(new AjaxResult { Status = "Ok" }); }
参考:
1)、http://pdf-lib.org/Home/Details/471
2)、https://github.com/fex-team/webuploader/issues/2258
3)、http://www.alicartoon.com/2016/08/01/webuploader-shang-chuan-da-tu-pian-fen-pian-shang-chuan-da-tu-pian/
4)、http://www.cnblogs.com/wisdo/p/6159761.html
5)、http://www.open-open.com/lib/view/open1421293847328.html