我想通过浏览按钮控件上传Excel文件。我不需要保存它。然后，在单击按钮时，如何在Excel中读取数据并在网格视图中显示它。我需要使用MVC完成此任务。
答案 0 :(得分：9)
以下是我修改后的答案：
1）从Microsoft
下载OpenXML SDK2）创建一个空白的MVC 5项目，并将其命名为“MVCImportExcel”
3）通过浏览到SDK lib子目录
添加对DocumentFormat.OpenXML的引用4）添加对WindowsBase的引用
5）创建名为“MyViewModel”的新模型
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Data.Entity;
using System.ComponentModel.DataAnnotations;
namespace MVCImportExcel.Models
{
public class MyViewModel
{
[Required]
public HttpPostedFileBase MyExcelFile { get; set; }
public string MSExcelTable { get; set; }
}
}
6）创建一个名为“HomeController”的新控制器
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using MVCImportExcel.Models;
using System.Data;
using DocumentFormat.OpenXml.Packaging;
using DocumentFormat.OpenXml.Spreadsheet;
using System.IO;
namespace MVCImportExcel.Controllers
{
public class HomeController : Controller
{
//
// GET: /Home/
public ActionResult Index()
{
var model = new MyViewModel();
return View(model);
}
[HttpPost]
public ActionResult Index(MyViewModel model)
{
if (!ModelState.IsValid)
{
return View(model);
}
DataTable dt = GetDataTableFromSpreadsheet(model.MyExcelFile.InputStream,false);
string strContent = "<p>Thanks for uploading the file</p>" + ConvertDataTableToHTMLTable(dt);
model.MSExcelTable = strContent;
return View(model);
}
public static DataTable GetDataTableFromSpreadsheet(Stream MyExcelStream, bool ReadOnly)
{
DataTable dt = new DataTable();
using (SpreadsheetDocument sDoc = SpreadsheetDocument.Open(MyExcelStream, ReadOnly))
{
WorkbookPart workbookPart = sDoc.WorkbookPart;
IEnumerable<Sheet> sheets = sDoc.WorkbookPart.Workbook.GetFirstChild<Sheets>().Elements<Sheet>();
string relationshipId = sheets.First().Id.Value;
WorksheetPart worksheetPart = (WorksheetPart)sDoc.WorkbookPart.GetPartById(relationshipId);
Worksheet workSheet = worksheetPart.Worksheet;
SheetData sheetData = workSheet.GetFirstChild<SheetData>();
IEnumerable<Row> rows = sheetData.Descendants<Row>();
foreach (Cell cell in rows.ElementAt(0))
{
dt.Columns.Add(GetCellValue(sDoc, cell));
}
foreach (Row row in rows) //this will also include your header row...
{
DataRow tempRow = dt.NewRow();
for (int i = 0; i < row.Descendants<Cell>().Count(); i++)
{
tempRow[i] = GetCellValue(sDoc, row.Descendants<Cell>().ElementAt(i));
}
dt.Rows.Add(tempRow);
}
}
dt.Rows.RemoveAt(0);
return dt;
}
public static string GetCellValue(SpreadsheetDocument document, Cell cell)
{
SharedStringTablePart stringTablePart = document.WorkbookPart.SharedStringTablePart;
string value = cell.CellValue.InnerXml;
if (cell.DataType != null && cell.DataType.Value == CellValues.SharedString)
{
return stringTablePart.SharedStringTable.ChildElements[Int32.Parse(value)].InnerText;
}
else
{
return value;
}
}
public static string ConvertDataTableToHTMLTable(DataTable dt)
{
string ret = "";
ret = "<table id=" + (char)34 + "tblExcel" + (char)34 + ">";
ret+= "<tr>";
foreach (DataColumn col in dt.Columns)
{
ret += "<td class=" + (char)34 + "tdColumnHeader" + (char)34 + ">" + col.ColumnName + "</td>";
}
ret+= "</tr>";
foreach (DataRow row in dt.Rows)
{
ret+="<tr>";
for (int i = 0;i < dt.Columns.Count;i++)
{
ret+= "<td class=" + (char)34 + "tdCellData" + (char)34 + ">" + row[i].ToString() + "</td>";
}
ret+= "</tr>";
}
ret+= "</table>";
return ret;
}
}
}
7）在Home下创建一个新视图，并将其命名为“Index”
@model MVCImportExcel.Models.MyViewModel
@{
Layout = null;
}
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width" />
<title></title>
<style type="text/css">
#tblExcel
{
width: 1000px;
border: none;
background-color: #000000;
}
.tdColumnHeader
{
padding: 2px 2px 2px 2px;
text-align: center;
font-family: Verdana;
font-size: 12px;
font-weight: bold;
background-color: cornflowerblue;
color: #FFFFFF;
}
.tdCellData
{
padding: 2px 2px 2px 2px;
font-family: Verdana;
font-size: 12px;
background-color: aqua;
color: #000000;
}
</style>
</head>
<body>
@using (Html.BeginForm(null,null,FormMethod.Post,new { enctype = "multipart/form-data" }))
{
<div>
@Html.LabelFor(x => x.MyExcelFile)
@Html.TextBoxFor(x => x.MyExcelFile, new { type = "file" })
@Html.ValidationMessageFor(x => x.MyExcelFile)
</div>
<button type="submit">Upload</button>
<br /><br />
@Html.Raw(Model.MSExcelTable)
}
</body>
</html>
就像我在评论中所说，这只适用于XLSX文件。希望这可以帮助你或其他人继续前进。
:)大卫
答案 1 :(得分：2)
我知道这个答案为时已晚。我只是想在google搜索问题之后为所有登陆此页面的人提供这个答案。 这是使用ClosedXML.Excel的方法 在Visual Studio中，单击工具菜单并展开NuGet包管理器，然后运行包管理器控制台。键入以下命令：
Install-Package ClosedXML
模特：
namespace ExcelUploadFileDemo.Models
{
public class UploadFile
{
[Required]
public HttpPostedFileBase ExcelFile { get; set; }
}
}
控制器：
namespace ExcelUploadFileDemo.Controllers
{
public class HomeController : Controller
{
public ActionResult Index()
{
UploadFile UploadFile = new UploadFile();
return View(UploadFile);
}
[HttpPost]
public ActionResult Index(UploadFile UploadFile)
{
if (ModelState.IsValid)
{
if (UploadFile.ExcelFile.ContentLength > 0)
{
if (UploadFile.ExcelFile.FileName.EndsWith(".xlsx") || UploadFile.ExcelFile.FileName.EndsWith(".xls"))
{
XLWorkbook Workbook;
Try//incase if the file is corrupt
{
Workbook = new XLWorkbook(UploadFile.ExcelFile.InputStream);
}
catch (Exception ex)
{
ModelState.AddModelError(String.Empty, $"Check your file. {ex.Message}");
return View();
}
IXLWorksheet WorkSheet = null;
Try//incase if the sheet you are looking for is not found
{
WorkSheet = Workbook.Worksheet("sheet1");
}
catch
{
ModelState.AddModelError(String.Empty, "sheet not found!");
return View();
}
WorkSheet.FirstRow().Delete();//if you want to remove ist row
foreach (var row in WorkSheet.RowsUsed())
{
//do something here
row.Cell(1).Value.ToString();//Get ist cell. 1 represent column number
}
}
else
{
ModelState.AddModelError(String.Empty, "Only .xlsx and .xls files are allowed");
return View();
}
}
else
{
ModelState.AddModelError(String.Empty, "Not a valid file");
return View();
}
}
return View();
}
}
}
此链接有许多示例，显示处理各种excel的不同方法。
https://github.com/ClosedXML/ClosedXML/tree/9ac4d868a313f308b82e94617b9cc2d28baeb1c3/ClosedXML
视图
@model ExcelUploadFileDemo.Models.UploadFile
@{
ViewBag.Title = "Upload Excel File";
}
<h2>Upload an Excel File</h2>
@using (Html.BeginForm(null, null, FormMethod.Post, new { enctype = "multipart/form-data" }))
{
@Html.AntiForgeryToken();
<div class="form-horizontal">
@Html.ValidationSummary("", new { @class = "text-danger" });
<div class="form-group">
@Html.LabelFor(model => model.ExcelFile, htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.TextBoxFor(model => model.ExcelFile, new { type = "file", @class = "form-control" })
@Html.ValidationMessageFor(model => model.ExcelFile, "", new { @class = "text-danger" })
</div>
</div>
<div class="form-group">
<div class="col-md-offset-2 col-md-10">
<input type = "submit" value="Submit" class="btn btn-default" />
</div>
</div>
</div>
}
答案 2 :(得分：2)
要从Excel文件中读取数据，您需要安装一个名为ExcelDataReader的nuget软件包。安装ExcelDataReader时，请选择V2.1.2.3。否则，有时会出现以下代码错误。
1。创建名为ReadExcel的控制器
2。并且您的Index.cshtml视图添加以下代码行。
@{
ViewBag.Title = "Read data from excel and view";
}
<h2>Read data from excel and view</h2>
@using (Html.BeginForm("Index", "ReadExcel", FormMethod.Post, new { enctype = "multipart/form-data" }))
{
@Html.AntiForgeryToken();
@Html.ValidationSummary();
<label class="text-info">Upload Excel File</label>
<input type="file" class="form-control" name="uploadfile" id="uploadfile" />
<input type="submit" value="submit" class="btn btn-default" />
if (Model != null)
{
<table class="table table-responsive table-bordered">
<thead>
<tr>
@foreach(DataColumn column in Model.Columns)
{
<th>@column.ColumnName</th>
}
</tr>
</thead>
<tbody>
@foreach(DataRow row in Model.Rows)
{
<tr>
@foreach(DataColumn col in Model.Columns)
{
<td>@row[col.ColumnName]</td>
}
</tr>
}
</tbody>
</table>
}
}
在您的控制器中添加以下代码段。
public class ReadExcelController : Controller
{
// GET: ReadExcel
public ActionResult Index()
{
return View();
}
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Index(HttpPostedFileBase uploadfile)
{
if (ModelState.IsValid)
{
if (uploadfile != null && uploadfile.ContentLength > 0)
{
//ExcelDataReader works on binary excel file
Stream stream = uploadfile.InputStream;
//We need to written the Interface.
IExcelDataReader reader = null;
if (uploadfile.FileName.EndsWith(".xls"))
{
//reads the excel file with .xls extension
reader = ExcelReaderFactory.CreateBinaryReader(stream);
}
else if (uploadfile.FileName.EndsWith(".xlsx"))
{
//reads excel file with .xlsx extension
reader = ExcelReaderFactory.CreateOpenXmlReader(stream);
}
else
{
//Shows error if uploaded file is not Excel file
ModelState.AddModelError("File", "This file format is not supported");
return View();
}
//treats the first row of excel file as Coluymn Names
reader.IsFirstRowAsColumnNames = true;
//Adding reader data to DataSet()
DataSet result = reader.AsDataSet();
reader.Close();
//Sending result data to View
return View(result.Tables[0]);
}
}
else
{
ModelState.AddModelError("File","Please upload your file");
}
return View();
}
}
答案 3 :(得分：0)
更新为Sachith的答案。
reader.IsFirstRowAsColumnNames = true;和reader.AsDataSet（）在最新的ExcelDataReader v 3.6中不再有效。 您还需要通过块安装ExcelDataReader.DataSet。 如果第一行是标题，则需要使用这样的数据集。
DataSet result = reader.AsDataSet(new ExcelDataSetConfiguration()
{
ConfigureDataTable = (_) => new ExcelDataTableConfiguration()
{
UseHeaderRow = true
}
});