AjaxFileUploader上传插件（一般上传）

转载自：http://www.cnblogs.com/zengxiangzhan/archive/2012/02/12/2348547.html

AjaxFileUploader上传插件兼容性好 Ie Chrome Firefox

html:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
    <script src="js/jquery-1.7.1.min.js" type="text/javascript"></script>
    <script src="js/ajaxfileupload.js" type="text/javascript"></script>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <input id="fileToUpload" type="file" size="45" name="fileToUpload" class="input" />
        <button id="buttonUpload" onclick="return ajaxFileUpload();">
            上传</button>
        <img id="loading" src="/images/loading.gif" style="display: none;" />
        <div id="imgshow" style="display: none;">
        </div>
    </div>
    </form>
    <script type="text/javascript">
        function ajaxFileUpload() {
            $("#loading")
    .ajaxStart(function () {
        $(this).show();
    })
    .ajaxComplete(function () {
        $(this).hide();
    });

            $.ajaxFileUpload(
        {
            url: '/ajax/AjaxFileUploader.ashx',
            secureuri: false,
            fileElementId: 'fileToUpload',
            dataType: 'json',
            data: { name: 'logan', id: 'id' },
            success: function (data, status) {
                if (typeof (data.error) !== 'undefined') {
                    if (data.error !== '') {
                        alert(data.error);
                    } else {
                        // alert(data.msg);
                        $('#imgshow').show();
                        $('#imgshow').append("<img src='/Temp/" + data.msg + "'  width='100' height='60' />");
                    }
                }
            },
            error: function (data, status, e) {
                alert(e);
            }
        }
    )

            return false;

        }
    </script>
</body>
</html>

服务端:

using System.Web;
using System.IO;
namespace AjaxFileUploader.ajax
{
    /// <summary>
    /// AjaxFileUploader 的摘要说明
    /// </summary>
    public class AjaxFileUploader : IHttpHandler
    {
        public void ProcessRequest(HttpContext context)
        {
            if (context.Request.Files.Count > 0)
            {
                string path = context.Server.MapPath("~/Temp");
                if (!Directory.Exists(path))
                    Directory.CreateDirectory(path);

                var file = context.Request.Files[0];

                string fileName;

                if (HttpContext.Current.Request.Browser.Browser.ToUpper() == "IE")
                {
                    string[] files = file.FileName.Split(new char[] { '\\' });
                    fileName = files[files.Length - 1];
                }
                else
                {
                    fileName = file.FileName;
                }

                string msg = "";
                string strFileName = fileName;
                if (string.IsNullOrEmpty(strFileName))
                {
                    msg = "{";
                    msg += string.Format("error:'{0}',\n", "请选择文件！");
                    msg += string.Format("msg:'{0}'\n", string.Empty);
                    msg += "}";
                }
                else
                {
                    fileName = Path.Combine(path, fileName);
                    file.SaveAs(fileName);

                    msg = "{";
                    msg += string.Format("error:'{0}',\n", string.Empty);
                    msg += string.Format("msg:'{0}'\n", strFileName);
                    msg += "}";
                }
                context.Response.Write(msg);
            }
        }

        public bool IsReusable
        {
            get
            {
                return true;
            }
        }
    }
}

插件:

//ajaxfileupload.js
jQuery.extend({
    createUploadIframe: function (id, uri) {
        //创建 frame
        var frameId = 'jUploadFrame' + id;
        var iframeHtml = '<iframe id="' + frameId + '" name="' + frameId + '" style="position:absolute; top:-9999px; left:-9999px"';
        if (window.ActiveXObject) {
            if (typeof uri == 'boolean') {
                iframeHtml += ' src="' + 'javascript:false' + '"';
            }
            else if (typeof uri == 'string') {
                iframeHtml += ' src="' + uri + '"';
            }
        }
        iframeHtml += ' />';
        jQuery(iframeHtml).appendTo(document.body);
        return jQuery('#' + frameId).get(0);
    },
    createUploadForm: function (id, fileElementId, data) {
        //创建 frame    
        var formId = 'jUploadForm' + id;
        var fileId = 'jUploadFile' + id;
        var form = jQuery('<form  action="" method="POST" name="' + formId + '" id="' + formId + '" enctype="multipart/form-data"></form>');
        if (data) {
            for (var i in data) {
                jQuery('<input type="hidden" name="' + i + '" value="' + data[i] + '" />').appendTo(form);
            }
        }
        var oldElement = jQuery('#' + fileElementId);
        var newElement = jQuery(oldElement).clone();
        jQuery(oldElement).attr('id', fileId);
        jQuery(oldElement).before(newElement);
        jQuery(oldElement).appendTo(form);

        //设置属性
        jQuery(form).css('position', 'absolute');
        jQuery(form).css('top', '-1200px');
        jQuery(form).css('left', '-1200px');
        jQuery(form).appendTo('body');
        return form;
    },

    ajaxFileUpload: function (s) {
        s = jQuery.extend({}, jQuery.ajaxSettings, s);
        var id = new Date().getTime()
        var form = jQuery.createUploadForm(id, s.fileElementId, (typeof (s.data) == 'undefined' ? false : s.data));
        var io = jQuery.createUploadIframe(id, s.secureuri);
        var frameId = 'jUploadFrame' + id;
        var formId = 'jUploadForm' + id;
        // 监控请求
        if (s.global && !jQuery.active++) {
            jQuery.event.trigger("ajaxStart");
        }
        var requestDone = false;
        // 创建请求对象
        var xml = {}
        if (s.global)
            jQuery.event.trigger("ajaxSend", [xml, s]);
        //等待一个响应返回
        var uploadCallback = function (isTimeout) {
            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";
                    //请求成功
                    if (status != "error") {
                        // 处理数据
                        var data = jQuery.uploadHttpData(xml, s.dataType);
                        if (s.success)
                            s.success(data, status);
                        // 触发全局返回
                        if (s.global)
                            jQuery.event.trigger("ajaxSuccess", [xml, s]);
                    } else
                        jQuery.handleError(s, xml, status);
                } catch (e) {
                    status = "error";
                    jQuery.handleError(s, xml, status, e);
                }

                // 请求完成
                if (s.global)
                    jQuery.event.trigger("ajaxComplete", [xml, s]);

                // 处理全局AJAX计数器
                if (s.global && ! --jQuery.active)
                    jQuery.event.trigger("ajaxStop");

                // 处理结果
                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

            }
        }
        // 超时检查
        if (s.timeout > 0) {
            setTimeout(function () {
                if (!requestDone) 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) {
                jQuery(form).attr('encoding', 'multipart/form-data');
            }
            else {
                jQuery(form).attr('enctype', 'multipart/form-data');
            }
            jQuery(form).submit();

        } catch (e) {
            jQuery.handleError(s, xml, null, e);
        }

        jQuery('#' + frameId).load(uploadCallback);
        return { abort: function () { } };

    },

    uploadHttpData: function (r, type) {
        var data = !type;
        data = type == "xml" || data ? r.responseXML : r.responseText;
        if (type == "script")
            jQuery.globalEval(data);
        if (type == "json")
            eval("data = " + data);
        if (type == "html")
            jQuery("<div>").html(data).evalScripts();
        return data;
    }
})

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原文地址：https://www.cnblogs.com/hongbi/p/2689904.html