function filePictureChange() { $.ajaxFileUpload({ url: "/Shared/Upload", //用于文件上传的服务器端请求地址 type: "post", secureuri: false, //一般设置为false fileElementId: "filePicture", //文件上传空间的id属性 dataType: "json", //返回值类型 一般设置为json success: function (data, status) { //服务器成功响应处理函数 alert(data.fileName); alert(data.filePath); alert(data.fileSize); }, error: function (data, status, e){ //服务器响应失败处理函数 alert(e); } }); };
后台控制器处理方法如下，使用MD5处理，判断文件是否已经存在，避免文件重复上传。
/// <summary> /// 附件上传 /// </summary> /// <returns></returns> public ActionResult Upload() { HttpFileCollection files = System.Web.HttpContext.Current.Request.Files; if (files.Count == 0) return Json("Faild", JsonRequestBehavior.AllowGet); MD5 md5Hasher = new MD5CryptoServiceProvider(); /*计算指定Stream对象的哈希值*/ byte[] arrbytHashValue = md5Hasher.ComputeHash(files[0].InputStream); /*由以连字符分隔的十六进制对构成的String，其中每一对表示value中对应的元素；例如“F-2C-4A”*/ string strHashData = System.BitConverter.ToString(arrbytHashValue).Replace("-", ""); string FileEextension = Path.GetExtension(files[0].FileName); string uploadDate = DateTime.Now.ToString("yyyyMMdd"); string virtualPath = string.Format("/Data/ComponentAttachments/{0}/{1}{2}", uploadDate, strHashData, FileEextension); string fullFileName = Server.MapPath(virtualPath); //创建文件夹，保存文件 string path = Path.GetDirectoryName(fullFileName); Directory.CreateDirectory(path); if (!System.IO.File.Exists(fullFileName)) { files[0].SaveAs(fullFileName); } string fileName = files[0].FileName.Substring(files[0].FileName.LastIndexOf("\\") + 1, files[0].FileName.Length - files[0].FileName.LastIndexOf("\\") - 1); string fileSize = GetFileSize(files[0].ContentLength); return Json(new { FileName = fileName, FilePath = virtualPath, FileSize = fileSize }, "text/html", JsonRequestBehavior.AllowGet); } /// <summary> /// 获取文件大小 /// </summary> /// <param></param> /// <returns></returns> private string GetFileSize(long bytes) { long kblength = 1024; long mbLength = 1024 * 1024; if (bytes < kblength) return bytes.ToString() + "B"; if (bytes < mbLength) return decimal.Round(decimal.Divide(bytes, kblength), 2).ToString() + "KB"; else return decimal.Round(decimal.Divide(bytes, mbLength), 2).ToString() + "MB"; }
2 ajaxFileUpload使用过程中的一些问题
2.0 jQuery.handleError is not a function
解决方法：
经测试handlerError只在jquery-1.4.2之前的版本中存在，以后版本中都没有这个函数了，因此在将handleError这个函数复制到ajaxFileUpload.js中，就行了
uploadHttpData: function (r, type) { var data = !type; data = type == "xml" || data ? r.responseXML : r.responseText; // If the type is "script", eval it in global context if (type == "script") jQuery.globalEval(data); // Get the JavaScript object, if JSON is used. if (type == "json") eval("data = " + data); //eval("data = \"" + data + "\""); // evaluate scripts within html if (type == "html") jQuery("<div>").html(data).evalScripts(); return data; }, handleError: function (s, xhr, status, e) { // If a local callback was specified, fire it if (s.error) { s.error.call(s.context || s, xhr, status, e); } // Fire the global callback if (s.global) { (s.context ? jQuery(s.context) : jQuery.event).trigger("ajaxError", [xhr, s, e]); } }