ASP.NET MVC 壹：浏览器选择文件并上传到服务器

1. 目的：在网页上选择需要的文件，并上传到IIS Express服务器。
2. 文件结构：

    

    

3. Upload/Index.cshtml代码

   @using (Html.BeginForm("Upload", "Upload", FormMethod.Post, new { enctype = "multipart/form-data" }))
   {
       <div style="margin-top: 20px;">
           <fieldset id="myfieldset1">
               <legend>信息导入</legend>
               <p>选择Excel文件：<input id="FileUpload" type="file" name="files" style=" 250px; height: 24px;background: White" class="easyui-validatebox" /></p>
               <p><input id="btnImport" type="submit" value="导入" style=" 60px; height: 28px;" /></p>
               <p style="color: Red; text-align: center;">@ViewBag.error</p>
           </fieldset>
       </div>
   }

4. Upload/Upload代码

   public ActionResult Upload(HttpPostedFileBase httpPostedFileBase)
           {
               HttpPostedFileBase httpPostedFile = Request.Files["files"];
               string FileName, SavePath;
               if(httpPostedFile == null || httpPostedFile.ContentLength <= 0)
               {
                   ViewBag.error = "文件不能为空";
                   return View();
               }
               else
               {
                   string ExcelName = Path.GetFileName(httpPostedFile.FileName);
                   string Extention = System.IO.Path.GetExtension(ExcelName);
                   string NoExtention = Path.GetFileNameWithoutExtension(ExcelName);
                   string FileType = ".xlsx";
                   FileName = NoExtention + Extention;
                   if (!FileType.Contains(Extention))
                   {
                       ViewBag.error = "只能导入xlsx格式的文件";
                       return View();
                   }
                   string path = AppDomain.CurrentDomain.BaseDirectory + "Uploads/";
                   SavePath = Path.Combine(path, FileName);
                   httpPostedFile.SaveAs(SavePath);
               }
               string Result = string.Empty;
               string strConn = "Provider=Microsoft.Ace.OleDb.12.0;Data Source=" + SavePath + ";" + "Extended Properties='Excel 12.0; HDR=Yes; IMEX=1'";
               OleDbConnection oleDbConnection = new OleDbConnection(strConn);
               oleDbConnection.Open();
               OleDbDataAdapter oleDbDataAdapter = new OleDbDataAdapter("select * from [生产计划$]", strConn);
               DataSet dataSet = new DataSet();
               try
               {
                   oleDbDataAdapter.Fill(dataSet, "Results");
                   oleDbConnection.Close();
                   DataTable dataTable = dataSet.Tables["Results"];
               }
               catch(InvalidCastException e)
               {
   
               }           
               SprayTable = dataSet.Tables["Results"].DefaultView.ToTable();
               //将部件数据放到数据库里
               //Spray spray = new Spray();
               //for(int i = 0; i < SprayTable.Rows.Count; i++)
               //{
               //    spray.MaterialGroupNum = SprayTable.Rows[i][20].ToString();
               //    spray.MaterialName = SprayTable.Rows[i][7].ToString().Replace("（", "(").Replace("）", ")");//不管用
               //    spray.PlanNum = Convert.ToInt32(SprayTable.Rows[i][12].ToString());
               //    layuiContext.Sprays.Add(spray);
               //    layuiContext.SaveChanges();
               //}
               return View(SprayTable);    //将excel表里的数据存储到了SprayTable里。
           }