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AjaxFileUpload 在C#中应用

发布时间：2025/3/19 C# 71 豆豆
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一、前台页面

<!DOCTYPE html><html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"/><title></title><script src="js/jquery-1.8.2.min.js" type="text/javascript"></script><script src="js/ajaxfileupload.js"></script><script type="text/javascript">function CheckFile() {$.ajaxFileUpload({url: 'upload.ashx?time=' + new Date(),secureuri: false,fileElementId: 'fuFileLoad', //上传控件ID dataType: 'json', //返回值类型 一般设置为jsonsuccess: function (data, status) {var jsonData = $.parseJSON(data);alert(jsonData.Eor);if (jsonData.Eor == "succss") {alert(jsonData.Msg);} else {alert(jsonData.Msg);}},error: function (data, status, e) {alert(e); //就是在这弹出“语法错误” }});}</script> </head> <body><form id="form1" runat="server"><asp:FileUpload ID="fuFileLoad" runat="server" οnchange="CheckFile();" /></form> </body> </html>

 二、上传功能代码 upload.ashx

using System; using System.IO; using System.Web; using System.Web.Script.Serialization;public class upload : IHttpHandler {public void ProcessRequest (HttpContext context) {//文件大小限制10Mconst int maxSize = 10485760;//定义允许上传的文件扩展名var ext = new[] { "rar", "zip", "gif", "jpg", "jpeg", "png", "bmp", "xls", "xlsx", "doc", "docx", "et", "wps" };string strExt = "";foreach (var a in ext){strExt += a + "/";}strExt = strExt.TrimEnd('/');string savePath = "/upLoads/"; //文件保存路径var resp = new UploadResponse();HttpFileCollection imgFile = context.Request.Files;if (imgFile.Count > 0){string fileExt = Path.GetExtension(imgFile[0].FileName); //获得扩展名if (string.IsNullOrEmpty(fileExt) || Array.IndexOf(ext, fileExt.Substring(1).ToLower()) < 0){resp.Eor = "error";resp.Msg = string.Format("扩展名为{0}的文件不允许上传!\n只允许上传{1}格式的文件。", fileExt, strExt);}else{if (imgFile[0].InputStream.Length > maxSize){resp.Eor = "error";resp.Msg = "上传文件大小超过限制！";}else{string fileNewName = DateTime.Now.ToString("yyyyMMddHHmmssffff") + fileExt; //新的文件名try{SaveFile(imgFile[0], context.Server.MapPath(savePath), fileNewName); //保存文件resp.Eor = "succss";resp.Msg = "上传成功! 文件大小为:" + imgFile[0].ContentLength;resp.ImgUrl = savePath + fileNewName;resp.FName = fileNewName;resp.OName = imgFile[0].FileName;}catch (Exception ex){resp.Eor = "error";resp.Msg = ex.ToString();}}}}else{resp.Eor = "error";resp.Msg = "请选择文件!";}context.Response.ContentType = "text/html";context.Response.Write(new JavaScriptSerializer().Serialize(resp));context.Response.End();}private void SaveFile(HttpPostedFile imgFile, string savePath, string fileName){if (!Directory.Exists(savePath)) //判断文件存放路径是否存在{Directory.CreateDirectory(savePath);}imgFile.SaveAs(Path.Combine(savePath, fileName));}public class UploadResponse{public string Eor { get; set; }public string Msg { get; set; }public string ImgUrl { get; set; }public string FName { get; set; }public string OName { get; set; }}public bool IsReusable {get {return false;}}}

 三、返回的json数据调整  

四、源代码下载地址：http://pan.baidu.com/s/1jGo1wzW

热烈欢迎大家吐槽。

 

转载于:https://www.cnblogs.com/wsk198726/p/4773353.html

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