• c# 使用ajaxfileupload上传文件，通过一般处理程序（Handler）接收文件 ashx 图片 Excel文件都可以

    https://blog.csdn.net/sinat_16998945/article/details/81125950

    界面如下图：

    HTML代码如下：

    1. <html >
    2. <head >
    3.     <!-- 引入jquery   ajaxfileupload.js     -->
    4.     <!-- ajaxfileupload.js  为了兼容IE不同版本，需要修改源代码，文章附带源代码   -->
    5.     <script src="../../Content/js/jquery/jquery-1.4.2.min.js" type="text/javascript"></script>
    6.     <script src="../../Content/js/ajaxfileupload.js" type="text/javascript"></script>
    7. </head>
    8. <body>
    9.     <div>
    10.         <div>
    11.             <input type="file" id="fileExcel" name="fileExcel"  />
    12.             <a onclick="ajaxFileUpload()" href="javascript:void(0);" >上传</a> 
    13.         </div>
    14.     </div>
    15. </body>
    16. <script type="text/javascript">
    17.     function ajaxFileUpload() {
    18.        try {
    19.             $.ajaxFileUpload({
    20.                 url: '../../AjaxHandler/SIMManage/SIMInfoHandler.ashx?action=UpFile', //用于文件上传的服务器端请求地址
    21.                 secureuri: false, //是否需要安全协议，一般设置为false
    22.                 fileElementId: 'fileExcel', //文件上传域的ID
    23.                 dataType: 'json', //返回值类型 一般设置为json
    24.                 success: function (data, status)  //服务器成功响应处理函数
    25.                 {
    26.                     //上传成功
    27.  
    28.                 },
    29.                 error: function (data, status, e)//服务器响应失败处理函数
    30.                 {
    31.                     alert(e);
    32.                 }
    33.             })
    34.        } catch (e) {
    35.            alert(e.Message)
    36.        }
    37.         return false;
    38.     }
    39. </script>
    40. </html>

    ajaxfileupload源代码修改如下：

            //      源代码
            //        if(window.ActiveXObject) {
            //            var io = document.createElement('<iframe id="' + frameId + '" name="' + frameId + '" />');
            //            if(typeof uri== 'boolean'){
            //                io.src = 'javascript:false';
            //            }
            //            else if(typeof uri== 'string'){
            //                io.src = uri;
            //            }
            //        }else {
            //            var io = document.createElement('iframe');
            //           io.id = frameId;
            //            io.name = frameId;
            //        }

            //修改源代码，参考网上大神修改内容
            if (window.ActiveXObject) {
                if (jQuery.browser.version == "9.0" || jQuery.browser.version == "10.0") {
                    var io = document.createElement('iframe');
                    io.id = frameId;
                    io.name = frameId;
                } else if (jQuery.browser.version == "6.0" || jQuery.browser.version == "7.0" || jQuery.browser.version == "8.0") {
                    var io = document.createElement('<iframe id="' + frameId + '" name="' + frameId + '" />');
                    if (typeof uri == 'boolean') {
                        io.src = 'javascript:false';
                    }
                    else if (typeof uri == 'string') {
                        io.src = uri;
                    }
                }
            }
            else {
                var io = document.createElement('iframe');
                io.id = frameId;
                io.name = frameId;
            }

    1.  
    2. jQuery.extend({
    3.     createUploadIframe: function (id, uri) {
    4.         //create frame
    5.         var frameId = 'jUploadFrame' + id;
    6.  
    7.         //*********************************************源代码，参考网上大神修改内容
    8.         //        if(window.ActiveXObject) {
    9.         //            var io = document.createElement('<iframe id="' + frameId + '" name="' + frameId + '" />');
    10.         //            if(typeof uri== 'boolean'){
    11.         //                io.src = 'javascript:false';
    12.         //            }
    13.         //            else if(typeof uri== 'string'){
    14.         //                io.src = uri;
    15.         //            }
    16.         //        }else {
    17.         //            var io = document.createElement('iframe');
    18.         //           io.id = frameId;
    19.         //            io.name = frameId;
    20.         //        }
    21.  
    22.         //***********************************************修改源代码
    23.         if (window.ActiveXObject) {
    24.             if (jQuery.browser.version == "9.0" || jQuery.browser.version == "10.0") {
    25.                 var io = document.createElement('iframe');
    26.                 io.id = frameId;
    27.                 io.name = frameId;
    28.             } else if (jQuery.browser.version == "6.0" || jQuery.browser.version == "7.0" || jQuery.browser.version == "8.0") {
    29.                 var io = document.createElement('<iframe id="' + frameId + '" name="' + frameId + '" />');
    30.                 if (typeof uri == 'boolean') {
    31.                     io.src = 'javascript:false';
    32.                 }
    33.                 else if (typeof uri == 'string') {
    34.                     io.src = uri;
    35.                 }
    36.             }
    37.         }
    38.         else {
    39.             var io = document.createElement('iframe');
    40.             io.id = frameId;
    41.             io.name = frameId;
    42.         }
    43.         io.style.position = 'absolute';
    44.         io.style.top = '-1000px';
    45.         io.style.left = '-1000px';
    46.  
    47.         document.body.appendChild(io);
    48.  
    49.         return io
    50.     },
    51.     createUploadForm: function (id, fileElementId) {
    52.         //create form
    53.         var formId = 'jUploadForm' + id;
    54.         var fileId = 'jUploadFile' + id;
    55.         var form = $('<form  action="" method="POST" name="' + formId + '" id="' + formId + '" enctype="multipart/form-data"></form>');
    56.         var oldElement = $('#' + fileElementId);
    57.         var newElement = $(oldElement).clone();
    58.         $(oldElement).attr('id', fileId);
    59.         $(oldElement).before(newElement);
    60.         $(oldElement).appendTo(form);
    61.         //set attributes
    62.         $(form).css('position', 'absolute');
    63.         $(form).css('top', '-1200px');
    64.         $(form).css('left', '-1200px');
    65.         $(form).appendTo('body');
    66.         return form;
    67.     },
    68.     addOtherRequestsToForm: function (form, data) {
    69.         // add extra parameter
    70.         var originalElement = $('<input type="hidden" name="" value="">');
    71.         for (var key in data) {
    72.             name = key;
    73.             value = data[key];
    74.             var cloneElement = originalElement.clone();
    75.             cloneElement.attr({ 'name': name, 'value': value });
    76.             $(cloneElement).appendTo(form);
    77.         }
    78.         return form;
    79.     },
    80.  
    81.     ajaxFileUpload: function (s) {
    82.         // TODO introduce global settings, allowing the client to modify them for all requests, not only timeout
    83.         s = jQuery.extend({}, jQuery.ajaxSettings, s);
    84.         var id = new Date().getTime()
    85.         var form = jQuery.createUploadForm(id, s.fileElementId);
    86.         if (s.data) form = jQuery.addOtherRequestsToForm(form, s.data);
    87.         var io = jQuery.createUploadIframe(id, s.secureuri);
    88.         var frameId = 'jUploadFrame' + id;
    89.         var formId = 'jUploadForm' + id;
    90.         // Watch for a new set of requests
    91.         if (s.global && !jQuery.active++) {
    92.             jQuery.event.trigger("ajaxStart");
    93.         }
    94.         var requestDone = false;
    95.         // Create the request object
    96.         var xml = {}
    97.         if (s.global)
    98.             jQuery.event.trigger("ajaxSend", [xml, s]);
    99.         // Wait for a response to come back
    100.         var uploadCallback = function (isTimeout) {
    101.             var io = document.getElementById(frameId);
    102.             try {
    103.                 if (io.contentWindow) {
    104.                     xml.responseText = io.contentWindow.document.body ? io.contentWindow.document.body.innerHTML : null;
    105.                     xml.responseXML = io.contentWindow.document.XMLDocument ? io.contentWindow.document.XMLDocument : io.contentWindow.document;
    106.  
    107.                 } else if (io.contentDocument) {
    108.                     xml.responseText = io.contentDocument.document.body ? io.contentDocument.document.body.innerHTML : null;
    109.                     xml.responseXML = io.contentDocument.document.XMLDocument ? io.contentDocument.document.XMLDocument : io.contentDocument.document;
    110.                 }
    111.             } catch (e) {
    112.                 jQuery.handleError(s, xml, null, e);
    113.             }
    114.             if (xml || isTimeout == "timeout") {
    115.                 requestDone = true;
    116.                 var status;
    117.                 try {
    118.                     status = isTimeout != "timeout" ? "success" : "error";
    119.                     // Make sure that the request was successful or notmodified
    120.                     if (status != "error") {
    121.                         // process the data (runs the xml through httpData regardless of callback)
    122.                         var data = jQuery.uploadHttpData(xml, s.dataType);
    123.                         // If a local callback was specified, fire it and pass it the data
    124.                         if (s.success)
    125.                             s.success(data, status);
    126.  
    127.                         // Fire the global callback
    128.                         if (s.global)
    129.                             jQuery.event.trigger("ajaxSuccess", [xml, s]);
    130.                     } else
    131.                         jQuery.handleError(s, xml, status);
    132.                 } catch (e) {
    133.                     status = "error";
    134.                     jQuery.handleError(s, xml, status, e);
    135.                 }
    136.  
    137.                 // The request was completed
    138.                 if (s.global)
    139.                     jQuery.event.trigger("ajaxComplete", [xml, s]);
    140.  
    141.                 // Handle the global AJAX counter
    142.                 if (s.global && ! --jQuery.active)
    143.                     jQuery.event.trigger("ajaxStop");
    144.  
    145.                 // Process result
    146.                 if (s.complete)
    147.                     s.complete(xml, status);
    148.  
    149.                 jQuery(io).unbind()
    150.  
    151.                 setTimeout(function () {
    152.                     try {
    153.                         $(io).remove();
    154.                         $(form).remove();
    155.  
    156.                     } catch (e) {
    157.                         jQuery.handleError(s, xml, null, e);
    158.                     }
    159.  
    160.                 }, 100)
    161.  
    162.                 xml = null
    163.  
    164.             }
    165.         }
    166.         // Timeout checker
    167.         if (s.timeout > 0) {
    168.             setTimeout(function () {
    169.                 // Check to see if the request is still happening
    170.                 if (!requestDone) uploadCallback("timeout");
    171.             }, s.timeout);
    172.         }
    173.         try {
    174.             // var io = $('#' + frameId);
    175.             var form = $('#' + formId);
    176.             $(form).attr('action', s.url);
    177.             $(form).attr('method', 'POST');
    178.             $(form).attr('target', frameId);
    179.             if (form.encoding) {
    180.                 form.encoding = 'multipart/form-data';
    181.             }
    182.             else {
    183.                 form.enctype = 'multipart/form-data';
    184.             }
    185.             $(form).submit();
    186.  
    187.         } catch (e) {
    188.             jQuery.handleError(s, xml, null, e);
    189.         }
    190.         if (window.attachEvent) {
    191.             document.getElementById(frameId).attachEvent('onload', uploadCallback);
    192.         }
    193.         else {
    194.             document.getElementById(frameId).addEventListener('load', uploadCallback, false);
    195.         }
    196.         return { abort: function () { } };
    197.  
    198.     },
    199.  
    200.     uploadHttpData: function (r, type) {
    201.         var data = !type;
    202.         data = type == "xml" || data ? r.responseXML : r.responseText;
    203.         // If the type is "script", eval it in global context
    204.         if (type == "script")
    205.             jQuery.globalEval(data);
    206.         // Get the JavaScript object, if JSON is used.
    207.         if (type == "json") {
    208.             // If you add mimetype in your response,
    209.             // you have to delete the '<pre></pre>' tag.
    210.             // The pre tag in Chrome has attribute, so have to use regex to remove
    211.             var data = r.responseText;
    212.             var rx = new RegExp("<pre.*?>(.*?)</pre>", "i");
    213.             var am = rx.exec(data);
    214.             //this is the desired data extracted
    215.             var data = (am) ? am[1] : "";    //the only submatch or empty
    216.             eval("data = " + data);
    217.         }
    218.         // evaluate scripts within html
    219.         if (type == "html")
    220.             jQuery("<div>").html(data).evalScripts();
    221.         //alert($('param', data).each(function(){alert($(this).attr('value'));}));
    222.         return data;
    223.     }
    224. })
    225.

    一般处理程序（Handler）接收文件代码如下

    1. using System;
    2. using System.Collections.Generic;
    3. using System.Linq;
    4. using System.Web;
    5. using System.Web.SessionState;
    6. using System.IO;
    7.  
    8. namespace Web.AjaxHandler.SIMManage
    9. {
    10.     /// <summary>
    11.     /// SIMInfoHandler 的摘要说明
    12.     /// </summary>
    13.     public class SIMInfoHandler : IHttpHandler
    14.     {
    15.  
    16.         HttpRequest Request;
    17.         HttpResponse Response;
    18.         public void ProcessRequest(HttpContext context)
    19.         {
    20.             context.Response.ContentType = "text/plain";
    21.             Request = context.Request;
    22.             Response = context.Response;
    23.             string action = Request.QueryString["action"];
    24.             switch (action)
    25.             {
    26.                 case "UpFile":
    27.                     UpFile();
    28.                     break;
    29.             }
    30.         }
    31.  
    32.         private void UpFile()
    33.         {
    34.             HttpFileCollection files = Request.Files;
    35.             string msg = string.Empty;
    36.             string error = string.Empty;
    37.             string res = string.Empty;
    38.             try
    39.             {
    40.  
    41.                 string filename = System.IO.Path.GetFileName(files[0].FileName);
    42.  
    43.                 //判断是否有文件
    44.                 if (filename == "")
    45.                 {
    46.                     Response.Write("上传文件为空，请选择上传文件格式为'.xls'的文件。");
    47.                     return;
    48.                 }
    49.  
    50.                 string [] strArrary = filename.Split('.');
    51.                 //判断文件格式
    52.                 if (strArrary.LastOrDefault() != "xls" && strArrary.LastOrDefault() != "xlsx")
    53.                 {
    54.                     Response.Write("上传文件格式不正确，请选择上传文件格式为'.xls'或'.xlsx'的文件。");
    55.                     return;
    56.                 }
    57.  
    58.                 //存放文件
    59.                 if (Directory.Exists(HttpContext.Current.Server.MapPath("~/Document/TemporaryDocuments")) == false)//如果不存在就创建file文件夹
    60.                 {
    61.                     Directory.CreateDirectory(HttpContext.Current.Server.MapPath("~/Document/TemporaryDocuments"));
    62.                 }
    63.                 string url = "~/Document/TemporaryDocuments/" + filename;
    64.                 string path = HttpContext.Current.Server.MapPath(url);
    65.                 files[0].SaveAs(path);
    66.  
    67.                 Response.Write("上传文件成功");
    68.                 return;
    69.             }
    70.             catch (Exception ex)
    71.             {
    72.             }
    73.         }
    74.  
    75.         public bool IsReusable
    76.         {
    77.             get
    78.             {
    79.                 return false;
    80.             }
    81.         }
    82.     }
    83. }
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  • 原文地址：https://www.cnblogs.com/sunny3158/p/14547282.html
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