.net文件上传的方法

前台js代码 导入jQuery上传插件Uploadify 3.2

 1 $("#photofile").uploadify({//上传电子相片
 2             swf: ‘/Theme/NewBlueVacation/images/uploadify.swf‘,
 3             uploader: ‘/ExtendClass/UploadFiles.ashx‘,   //后台处理文件的路径
 4             width: 85,
 5             height: 21,
 6             buttonText: ‘    ‘,//上传按钮文字
 7             fileSizeLimit: ‘20KB‘,
 8             multi: false,
 9             buttonImage: "/Theme/NewBlueVacation/images/ManualRecharge_tubiao06.png",//上传按钮路径
10             fileTypeExts: ‘*.jpg‘,//;*.png;*.gif;*.bmp;*.doc;*.docx
11             fileTypeDesc: ‘图片文件‘,
12             onSelectError: function (file, errorCode, errorMsg) {
13                 switch (errorCode) {
14                     case -100:
15                         layer.alert("上传的文件数量已经超出系统限制的" + $(‘#photofile‘).uploadify(‘settings‘, ‘queueSizeLimit‘) + "个文件！");
16                         break;
17                     case -110:
18                         layer.alert("文件 [" + file.name + "] 大小超出系统限制的" + $(‘#photofile‘).uploadify(‘settings‘, ‘fileSizeLimit‘) + "大小！");
19                         break;
20                     case -120:
21                         layer.alert("文件 [" + file.name + "] 大小异常！");
22                         break;
23                     case -130:
24                         layer.alert("文件 [" + file.name + "] 类型不正确！");
25                         break;
26                 }
27             },
28             onUploadSuccess: function (file, data, response) {
29                 if (data == "0") {
30                     $.messager.alert("提示", "上传失败!", ‘error‘);
31                 }
32                 else {
33                     $("<img/>").attr("src", data).load(function () {
34                         /*
35                           如果要获取图片的真实的宽度和高度有三点必须注意
36                           1、需要创建一个image对象：如这里的$("<img/>")
37                           2、指定图片的src路径
38                           3、一定要在图片加载完成后执行如.load()函数里执行
39                         */
40                         realWidth = this.width;
41                         realHeight = this.height;
42                         //如果真实的宽度大于浏览器的宽度就按照100%显示
43                         if (realWidth != 358) {
44                             this.width = 358;
45                         }
46                         else {//如果小于浏览器的宽度按照原尺寸显示
47                             //$(img).css("width", realWidth + ‘px‘).css("height", realHeight + ‘px‘);
48                         }
49                         if (realHeight != 441)
50                         {
51                             this.height=441;
52                         }
53                     });
54                     //$(‘#photopic‘).attr(‘src‘, data);
55                     $(‘#photofilename‘).val(data);
56                     $(‘#phototext‘).val(file.name);
57                 }
58             }
59         });

js代码

后台C#代码

 1  public void ProcessRequest(HttpContext context)
 2         {
 3             context.Response.ContentType = "text/plain";
 4             HttpPostedFile file = context.Request.Files["Filedata"];
 5             string Dir = "Upload";
 6             string uploadPath = "\\" + Dir + "\\TravelProduct\\" + DateTime.Now.ToString("yyyyMMdd") + "\\";
 7             string returnPath = uploadPath.Replace("\\", "/");
 8             uploadPath = HttpContext.Current.Server.MapPath(uploadPath);
 9             if (file != null)
10             {
11                 if (!Directory.Exists(uploadPath))
12                 {
13                     Directory.CreateDirectory(uploadPath);
14                 }
15                 string fileType = Tool.MakeRandomNumber(8, 1) + Tool.GetPicType(file.FileName);
16                 file.SaveAs(uploadPath + fileType);
17                 //下面这句代码缺少的话，上传成功后上传队列的显示不会自动消失
18                 context.Response.Write(returnPath + fileType);
19             }
20             else
21             {
22                 context.Response.Write("0");
23             }
24         }
25 #region 取指定文件的后缀名
26         /// <summary>
27         /// 取指定文件的后缀名
28         /// </summary>
29         /// <param name="PicName">文件名或文件路径</param>
30         /// <returns></returns>
31         public static string GetPicType(string PicName)
32         {
33             return Path.GetExtension(PicName);
34         }
35         #endregion

上传文件的后台代码