【发布时间】:2016-12-01 13:38:15
【问题描述】:
我在名为 ListProduct.xls 的 Excel 工作表中有表格。当我导入 excel 文件时,我希望它在成功页面中打印表格。索引页面工作正常,我可以单击浏览并让我选择 excel 文件。但是当我单击导入时,它会在我的产品控制器上出现错误。
string path = Server.MapPath("~/Content/" + excelfile.FileName);
这行给了我一个错误。它显示的错误是
NotSupportedException 未被用户代码处理。 mscorlib.dll 中出现“System.NotSupportedException”类型的异常,但未在用户代码中处理
ProductController.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using Excel = Microsoft.Office.Interop.Excel;
using System.IO;
using ImportExcelFileInASPNETMVC.Models;
namespace ImportExcelFileInASPNETMVC.Controllers
{
public class ProductController : Controller
{
public ActionResult Index()
{
return View();
}
[HttpPost]
public ActionResult Import(HttpPostedFileBase excelfile)
{
if (excelfile == null || excelfile.ContentLength == 0)
{
ViewBag.Error = "Please select a excel file<br>";
return View("Index");
}
else
{
if (excelfile.FileName.EndsWith("xls") || excelfile.FileName.EndsWith("xlsx"))
{
string path = Server.MapPath("~/Content/" + excelfile.FileName);
if (System.IO.File.Exists(path))
System.IO.File.Delete(path);
excelfile.SaveAs(path);
// Read data from excel file
Excel.Application application = new Excel.Application();
Excel.Workbook workbook = application.Workbooks.Open(path);
Excel.Worksheet worksheet = workbook.ActiveSheet;
Excel.Range range = worksheet.UsedRange;
List<Product> listProducts = new List<Product>();
for (int row = 3; row <= range.Rows.Count; row++)
{
Product p = new Product();
p.Name = ((Excel.Range)range.Cells[row, 2]).Text;
listProducts.Add(p);
}
ViewBag.ListProducts = listProducts;
return View("Success");
}
else
{
ViewBag.Error = "File type is incorrect<br>";
return View("Index");
}
}
}
}
}
索引.cshtml
@{
Layout = null;
}
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width" />
<title>Index</title>
</head>
<body>
@using (Html.BeginForm("Import", "Product", FormMethod.Post, new { enctype = "multipart/form-data" }))
{
@Html.Raw(ViewBag.Error)
<span>Excel File </span><input type="file" name="excelfile" />
<br />
<input type="submit" value="Import" />
}
</body>
</html>
成功.cshtml
@{
Layout = null;
}
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width" />
<title>Success</title>
</head>
<body>
<table cellpadding="2" cellspacing="2" border="1">
<tr>
<th>Name</th>
</tr>
@foreach (var p in ViewBag.ListProducts)
{
<tr>
<td>@p.Name</td>
</tr>
}
</table>
</body>
</html>
【问题讨论】:
-
您需要退后一步,将这些任务分成单独的功能。也许是一个处理上传的函数,一个处理excel解析的函数,然后是一个处理将解析的数据加载到表单中以供显示的函数。其次,使用 Excel 互操作会在故障排除中引起各种头痛,这可能就是 NotSupportedException 的来源。我会切换到 ClosedXMl 或 EPPuls 之类的库来解析 Excel 文件。
-
我是编程新手,只是想了解我从网站上获得了这段代码。我不确定如何使用 ClosedXMI 或 EPPuls。如果您能抽出一些宝贵的时间来编写或编辑代码的外观,那就太好了
标签: c# asp.net-mvc razor