asp.net webuploader粘贴，拖拽，点击上传图片

demo.html代码：
<!DOCTYPE html>
<html lang="zh-CN">

	<head>
		<meta charset="UTF-8">
		<meta http-equiv="X-UA-Compatible" content="IE=edge">
		<meta name="viewport" content="width=device-width, initial-scale=1.0">
		<title>演示 - Web Uploader</title>
		<!-- HTML5 Shim and Respond.js IE8 support of HTML5 elements and media queries -->
		<!-- WARNING: Respond.js doesn't work if you view the page via file:// -->
		<!--[if lt IE 9]>
        <script src="https://oss.maxcdn.com/libs/html5shiv/3.7.0/html5shiv.js"></script>
        <script src="https://oss.maxcdn.com/libs/respond.js/1.3.0/respond.min.js"></script>
    <![endif]-->
		<link rel="stylesheet" type="text/css" href="/webuploader/css/bootstrap.min.css">
		<link rel="stylesheet" type="text/css" href="/webuploader/css/bootstrap-theme.min.css">
		<link rel="stylesheet" type="text/css" href="css/style.css" />
		<link rel="stylesheet" type="text/css" href="/webuploader/css/webuploader.css">
		<link rel="stylesheet" type="text/css" href="/webuploader/css/demo.css">
	</head>

	<body>
		<div id="wrapper">
			<div class="page-body">
				<div id="post-container" class="container">
					<div class="page-container">
						<h1 id="demo">Demo</h1>
						<p>您可以尝试文件拖拽，使用QQ截屏工具，然后激活窗口后粘贴，或者点击添加图片按钮，来体验此demo.</p>
						<div id="uploader" class="wu-example">
							<div class="queueList">
								<div id="dndArea" class="placeholder">
									<div id="filePicker"></div>
									<p>或将照片拖到这里，单次最多可选300张</p>
								</div>
							</div>
							<div class="statusBar" style="display:none;">
								<div class="progress">
									<span class="text">0%</span>
									<span class="percentage"></span>
								</div>
								<div class="info"></div>
								<div class="btns">
									<div id="filePicker2"></div>
									<div class="uploadBtn">开始上传</div>
								</div>
							</div>
						</div>
					</div>
				</div>
			</div>
		</div>
		<script type="text/javascript">
			// 添加全局站点信息
			var BASE_URL = '/webuploader';
		</script>
		<script type="text/javascript" src="/webuploader/js/jquery-1.10.2.min.js"></script>
		<script type="text/javascript" src="/webuploader/js/bootstrap.min.js"></script>
		<script type="text/javascript" src="/webuploader/js/webuploader.js"></script>
		<script type="text/javascript" src="/webuploader/js/demo.js"></script>

	</body>

</html>


demo.js代码：
jQuery(function() {
    var $ = jQuery,    // just in case. Make sure it's not an other libaray.
 
        $wrap = $('#uploader'),
 
        // 图片容器
        $queue = $('<ul class="filelist"></ul>')
            .appendTo( $wrap.find('.queueList') ),
 
        // 状态栏，包括进度和控制按钮
        $statusBar = $wrap.find('.statusBar'),
 
        // 文件总体选择信息。
        $info = $statusBar.find('.info'),
 
        // 上传按钮
        $upload = $wrap.find('.uploadBtn'),
 
        // 没选择文件之前的内容。
        $placeHolder = $wrap.find('.placeholder'),
 
        // 总体进度条
        $progress = $statusBar.find('.progress').hide(),
 
        // 添加的文件数量
        fileCount = 0,
 
        // 添加的文件总大小
        fileSize = 0,
 
        // 优化retina, 在retina下这个值是2
        ratio = window.devicePixelRatio || 1,
 
        // 缩略图大小
        thumbnailWidth = 110 * ratio,
        thumbnailHeight = 110 * ratio,
 
        // 可能有pedding, ready, uploading, confirm, done.
        state = 'pedding',
 
        // 所有文件的进度信息，key为file id
        percentages = {},
 
        supportTransition = (function(){
            var s = document.createElement('p').style,
                r = 'transition' in s ||
                      'WebkitTransition' in s ||
                      'MozTransition' in s ||
                      'msTransition' in s ||
                      'OTransition' in s;
            s = null;
            return r;
        })(),
 
        // WebUploader实例
        uploader;
 
    if ( !WebUploader.Uploader.support() ) {
        alert( 'Web Uploader 不支持您的浏览器！如果你使用的是IE浏览器，请尝试升级 flash 播放器');
        throw new Error( 'WebUploader does not support the browser you are using.' );
    }
 
    // 实例化
    uploader = WebUploader.create({
        pick: {
            id: '#filePicker',
            label: '点击选择图片'
        },
        dnd: '#uploader .queueList',
        paste: document.body,
 
        accept: {
            title: 'Images',
           // extensions: 'gif,jpg,jpeg,bmp,png',
            mimeTypes: 'image/*'
        },
 
        // swf文件路径
        swf: BASE_URL + 'Uploader.swf',
 
        disableGlobalDnd: true,
 
        chunked: true,
        // server: 'http://webuploader.duapp.com/server/fileupload.php',
        server: '/webuploader/server/Uploader.ashx',
        fileNumLimit: 300,
        fileSizeLimit: 5 * 1024 * 1024,    // 200 M
        fileSingleSizeLimit: 1 * 1024 * 1024    // 50 M
    });
 
    // 添加“添加文件”的按钮，
    uploader.addButton({
        id: '#filePicker2',
        label: '继续添加'
    });
    // 当有文件添加进来时执行，负责view的创建
    function addFile( file ) {
        var $li = $( '<li id="' + file.id + '">' +
                '<p class="title">' + file.name + '</p>' +
                '<p class="imgWrap"></p>'+
                '<p class="progress"><span></span></p>' +
                '</li>' ),
 
            $btns = $('<div class="file-panel">' +
                '<span class="cancel">删除</span>' +
                '<span class="rotateRight">向右旋转</span>' +
                '<span class="rotateLeft">向左旋转</span></div>').appendTo( $li ),
            $prgress = $li.find('p.progress span'),
            $wrap = $li.find( 'p.imgWrap' ),
            $info = $('<p class="error"></p>'),
 
            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 ) {
                if ( error ) {
                    $wrap.text( '不能预览' );
                    return;
                }
 
                var img = $('<img src="'+src+'">');
                $wrap.empty().append( img );
            }, 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( '<span class="success"></span>' );
            }
 
            $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，<a class="retry" href="#">重新上传</a>失败图片或<a class="ignore" href="#">忽略</a>'
            }
 
        } 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.parent().removeClass('filled');
                $queue.hide();
                $statusBar.addClass( 'element-invisible' );
                uploader.refresh();
                break;
 
            case 'ready':
                $placeHolder.addClass( 'element-invisible' );
                $( '#filePicker2' ).removeClass( 'element-invisible');
                $queue.parent().addClass('filled');
                $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();
                $upload.text( '开始上传' ).addClass( 'disabled' );
 
                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();
});
 
【推广】 免费学中医，健康全家人
原文地址：https://www.cnblogs.com/ft-Pavilion/p/5377407.html