1、导出Excel ：
首先引用NPOI包
（Action一定要用FileResult）
/// <summary>
/// 批量导出需要导出的列表
/// </summary>
/// <returns></returns>
public FileResult ExportStu2()
{
//获取list数据
var checkList = (from oc in db.OrganizeCustoms
join o in db.Organizes.DefaultIfEmpty() on oc.custom_id equals o.id
where oc.organize_id ==
select new
{
customer_id = o.id,
customer_name = o.name
}).ToList(); //创建Excel文件的对象
NPOI.HSSF.UserModel.HSSFWorkbook book = new NPOI.HSSF.UserModel.HSSFWorkbook();
//添加一个sheet
NPOI.SS.UserModel.ISheet sheet1 = book.CreateSheet("Sheet1"); //貌似这里可以设置各种样式字体颜色背景等，但是不是很方便，这里就不设置了 //给sheet1添加第一行的头部标题
NPOI.SS.UserModel.IRow row1 = sheet1.CreateRow();
row1.CreateCell().SetCellValue("编号");
row1.CreateCell().SetCellValue("姓名");
//....N行 //将数据逐步写入sheet1各个行
for (int i = ; i < checkList.Count; i++)
{
NPOI.SS.UserModel.IRow rowtemp = sheet1.CreateRow(i + );
rowtemp.CreateCell().SetCellValue(checkList[i].customer_id.ToString());
rowtemp.CreateCell().SetCellValue(checkList[i].customer_name.ToString());
//....N行
}
// 写入到客户端
System.IO.MemoryStream ms = new System.IO.MemoryStream();
book.Write(ms);
ms.Seek(, SeekOrigin.Begin);
DateTime dt = DateTime.Now;
string dateTime = dt.ToString("yyMMddHHmmssfff");
string fileName = "查询结果" + dateTime + ".xls";
return File(ms, "application/vnd.ms-excel", fileName);
}
前台直接写就可实现：
@Html.ActionLink("点击导出Excel", "ExportStu2")
这里有一篇专门介绍设置样式的文章：
http://www.cnblogs.com/puzi0315/p/3265958.html
http://blog.csdn.net/xhccom/article/details/7687264
http://blog.csdn.net/bestreally/article/details/23257851
2、导入Excel：
首先说一些前台吧，mvc上传注意必须加 new { enctype = "multipart/form-data" }
@using (@Html.BeginForm("StockInExcel", "StockInList", null, FormMethod.Post, new { enctype = "multipart/form-data" }))
{
<div class="block-detail">
<table>
<tr>
<td class="pop-name">
选择文件：
</td>
<td class="pop-value">
<input type="text" name="ExcelName" id="ExcelName" readonly="readonly" onclick="file.click();" />
<input type="file" id="file" name="file" onchange="javascript: document.getElementById('ExcelName').value = document.getElementById('file').value;" style="display:none" />
<input type="button" id="Choose" name="Choose" value="选择" onclick="file.click();" />
</td>
</tr>
</table>
</div>
<input type="submit" id="submit" name="submit" value="开始导入" />
}
后台实现：得出DataTable：
[HttpPost]
public void StockInExcel()
{
string filePath = "";
//存入文件
if (Request.Files["file"].ContentLength > )
{
filePath = Server.MapPath("~/Upload/") + System.IO.Path.GetFileName(Request.Files["file"].FileName);
Request.Files["file"].SaveAs(filePath);
} try
{
IWorkbook hssfworkbook;
using (FileStream file = new FileStream(filePath, FileMode.Open, FileAccess.Read))
{
hssfworkbook = new XSSFWorkbook(file);
} NPOI.SS.UserModel.ISheet sheet = hssfworkbook.GetSheetAt(); DataTable table = new DataTable();
IRow headerRow = sheet.GetRow();//第一行为标题行
int cellCount = headerRow.LastCellNum;//LastCellNum = PhysicalNumberOfCells
int rowCount = sheet.LastRowNum;//LastRowNum = PhysicalNumberOfRows - 1 //handling header.
for (int i = headerRow.FirstCellNum; i < cellCount; i++)
{
DataColumn column = new DataColumn(headerRow.GetCell(i).StringCellValue);
table.Columns.Add(column);
}
for (int i = (sheet.FirstRowNum + ); i <= rowCount; i++)
{
IRow row = sheet.GetRow(i);
DataRow dataRow = table.NewRow(); if (row != null)
{
for (int j = row.FirstCellNum; j < cellCount; j++)
{
if (row.GetCell(j) != null)
dataRow[j] = GetCellValue(row.GetCell(j));
}
}
table.Rows.Add(dataRow);
}
}
catch (Exception e)
{
throw e;
} } /// <summary>
/// 根据Excel列类型获取列的值
/// </summary>
/// <param name="cell">Excel列</param>
/// <returns></returns>
private static string GetCellValue(ICell cell)
{
if (cell == null) { return string.Empty; }
switch (cell.CellType)
{
case CellType.Blank:
return string.Empty;
case CellType.Boolean:
return cell.BooleanCellValue.ToString();
case CellType.Error:
return cell.ErrorCellValue.ToString();
case CellType.Numeric:
case CellType.Unknown:
default:
return cell.ToString();//This is a trick to get the correct value of the cell. NumericCellValue will return a numeric value no matter the cell value is a date or a number
case CellType.String:
return cell.StringCellValue;
case CellType.Formula:
try
{
HSSFFormulaEvaluator e = new HSSFFormulaEvaluator(cell.Sheet.Workbook);
e.EvaluateInCell(cell);
return cell.ToString();
}
catch
{
return cell.NumericCellValue.ToString();
}
}
}
独立除一个方法 ExcelToDatatable
public DataTable ExcelToDatatable(string filePath)
{
try
{
IWorkbook workbook = null;
using (FileStream file = new FileStream(filePath, FileMode.Open, FileAccess.Read))
{
if (Path.GetExtension(filePath) == ".xls")
workbook = new HSSFWorkbook(file);
else if (Path.GetExtension(filePath) == ".xlsx")
workbook = new XSSFWorkbook(file);
} NPOI.SS.UserModel.ISheet sheet = workbook.GetSheetAt(); DataTable table = new DataTable();
IRow headerRow = sheet.GetRow();//第一行为标题行
int cellCount = headerRow.LastCellNum;//LastCellNum = PhysicalNumberOfCells
int rowCount = sheet.LastRowNum;//LastRowNum = PhysicalNumberOfRows - 1 //handling header.
for (int i = headerRow.FirstCellNum; i < cellCount; i++)
{
DataColumn column = new DataColumn(headerRow.GetCell(i).StringCellValue);
table.Columns.Add(column);
}
for (int i = (sheet.FirstRowNum + ); i <= rowCount; i++)
{
IRow row = sheet.GetRow(i);
DataRow dataRow = table.NewRow(); if (row != null)
{
for (int j = row.FirstCellNum; j < cellCount; j++)
{
if (row.GetCell(j) != null)
dataRow[j] = GetCellValue(row.GetCell(j));
}
}
table.Rows.Add(dataRow);
}
return table;
}
catch (Exception e)
{
throw e;
return null;
}
}
得到DataTable后，就想怎么操作就怎么操作了。