Asp.net]常见数据导入Excel，Excel数据导入数据库解决方案，总有一款适合你！

http://www.cnblogs.com/wolf-sun/p/3589605.html

引言

项目中常用到将数据导入Excel，将Excel中的数据导入数据库的功能，曾经也查找过相关的内容，将曾经用过的方案总结一下。

方案一

NPOI

NPOI 是 POI 项目的 .NET 版本。POI是一个开源的Java读写Excel、WORD等微软OLE2组件文档的项目。
使用 NPOI 你就可以在没有安装 Office 或者相应环境的机器上对 WORD/EXCEL 文档进行读写。NPOI是构建在POI 3.x版本之上的，它可以在没有安装Office的情况下对Word/Excel文档进行读写操作。

优势

（一）传统操作Excel遇到的问题：
1、如果是.NET，需要在服务器端装Office，且及时更新它，以防漏洞，还需要设定权限允许.NET访问COM+，如果在导出过程中出问题可能导致服务器宕机。
2、Excel会把只包含数字的列进行类型转换，本来是文本型的，Excel会将其转成数值型的，比如编号000123会变成123。
3、导出时，如果字段内容以“-”或“=”开头，Excel会把它当成公式进行，会报错。
4、Excel会根据Excel文件前8行分析数据类型，如果正好你前8行某一列只是数字，那它会认为该列为数值型，自动将该列转变成类似1.42702E+17格式，日期列变成包含日期和数字的。
（二）使用NPOI的优势
1、您可以完全免费使用该框架
2、包含了大部分EXCEL的特性(单元格样式、数据格式、公式等等)
3、专业的技术支持服务(24*7全天候) (非免费)
4、支持处理的文件格式包括xls, xlsx, docx.
5、采用面向接口的设计架构( 可以查看 NPOI.SS 的命名空间)
6、同时支持文件的导入和导出
7、基于.net 2.0 也支持xlsx 和 docx格式(当然也支持.net 4.0)
8、来自全世界大量成功且真实的测试Cases
9、大量的实例代码
11、你不需要在服务器上安装微软的Office，可以避免版权问题。
12、使用起来比Office PIA的API更加方便，更人性化。
13、你不用去花大力气维护NPOI，NPOI Team会不断更新、改善NPOI，绝对省成本。
NPOI之所以强大，并不是因为它支持导出Excel，而是因为它支持导入Excel，并能“理解”OLE2文档结构，这也是其他一些Excel读写库比较弱的方面。通常，读入并理解结构远比导出来得复杂，因为导入你必须假设一切情况都是可能的，而生成你只要保证满足你自己需求就可以了，如果把导入需求和生成需求比做两个集合，那么生成需求通常都是导入需求的子集，这一规律不仅体现在Excel读写库中，也体现在pdf读写库中，目前市面上大部分的pdf库仅支持生成，不支持导入。

构成

NPOI 1.2.x主要由POIFS、DDF、HPSF、HSSF、SS、Util六部分组成。

NPOI.POIFS	OLE2/ActiveX文档属性读写库
NPOI.DDF	Microsoft Office Drawing读写库
NPOI.HPSF	OLE2/ActiveX文档读写库
NPOI.HSSF	Microsoft Excel BIFF(Excel 97-2003)格式读写库
NPOI.SS	Excel公用接口及Excel公式计算引擎
NPOI.Util	基础类库，提供了很多实用功能，可用于其他读写文件格式项目的开发

NPOI组成部分

NPOI 1.x的最新版为NPOI 1.2.5，其中包括了以下功能：

1、读写OLE2文档

2、读写DocummentSummaryInformation和SummaryInformation

3、基于LittleEndian的字节读写

4、读写Excel BIFF格式

5、识别并读写Excel BIFF中的常见Record，如RowRecord, StyleRecord, ExtendedFormatRecord

6、支持设置单元格的高、宽、样式等

7、支持调用部分Excel内建函数，比如说sum, countif以及计算符号

8、支持在生成的XLS内嵌入打印设置，比如说横向/纵向打印、缩放、使用的纸张等。

NPOI 2.0主要由SS, HPSF, DDF, HSSF, XWPF, XSSF, OpenXml4Net, OpenXmlFormats组成，具体列表如下：

Assembly名称	模块/命名空间	说明
NPOI.DLL	NPOI.POIFS	OLE2/ActiveX文档属性读写库
NPOI.DLL	NPOI.DDF	微软Office Drawing读写库
NPOI.DLL	NPOI.HPSF	OLE2/ActiveX文档读写库
NPOI.DLL	NPOI.HSSF	微软Excel BIFF(Excel 97-2003, doc)格式读写库
NPOI.DLL	NPOI.SS	Excel公用接口及Excel公式计算引擎
NPOI.DLL	NPOI.Util	基础类库，提供了很多实用功能，可用于其他读写文件格式项目的开发
NPOI.OOXML.DLL	NPOI.XSSF	Excel 2007(xlsx)格式读写库
NPOI.OOXML.DLL	NPOI.XWPF	Word 2007(docx)格式读写库
NPOI.OpenXml4Net.DLL	NPOI.OpenXml4Net	OpenXml底层zip包读写库
NPOI.OpenXmlFormats.DLL	NPOI.OpenXmlFormats	微软Office OpenXml对象关系库

(以上内容来自百度百科）从上表可知NPOI组件已支持excel2007，记得之前用的时候只支持excel2003。很久没研究过这玩意儿了。

案例

官网地址：http://npoi.codeplex.com/，可以从官网下载NPOI2.X版本的。

首先引入

ICSharpCode.SharpZipLib.dll

NPOI.dll

NPOI.OOXML.dll

NPOI.OpenXml4Net.dll

NPOI.OpenXmlFormats.dll

然后引入命名空间：

using NPOI.XSSF.UserModel;
using NPOI.SS.UserModel;
using NPOI.HSSF.UserModel;

辅助类

using NPOI.XSSF.UserModel;
using NPOI.SS.UserModel;
using NPOI.HSSF.UserModel;
using System;
using System.Collections.Generic;
using System.Data;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using NPOI.SS.Formula.Eval;

namespace Wolfy.Common
{
/// <summary>
/// 使用NPOI组件
/// 需引入ICSharpCode.SharpZipLib.dll/NPOI.dll/NPOI.OOXML.dll/NPOI.OpenXml4Net.dll/NPOI.OpenXmlFormats.dll
/// office2007
/// </summary>
public class NPOIExcelHelper
{
/// <summary>
/// 将Excel文件中的数据读出到DataTable中
/// </summary>
/// <param name="file"></param>
/// <returns></returns>
public static DataTable Excel2DataTable(string file, string sheetName, string tableName)
{
DataTable dt = new DataTable();
IWorkbook workbook = null;
using (FileStream fs = new FileStream(file, FileMode.Open, FileAccess.Read))
{
//office2003 HSSFWorkbook
workbook = new XSSFWorkbook(fs);
}
ISheet sheet = workbook.GetSheet(sheetName);
dt = Export2DataTable(sheet, 0, true);
return dt;

}
/// <summary>
/// 将指定sheet中的数据导入到datatable中
/// </summary>
/// <param name="sheet">指定需要导出的sheet</param>
/// <param name="HeaderRowIndex">列头所在的行号，-1没有列头</param>
/// <param name="needHeader"></param>
/// <returns></returns>
private static DataTable Export2DataTable(ISheet sheet, int HeaderRowIndex, bool needHeader)
{
DataTable dt = new DataTable();
XSSFRow headerRow = null;
int cellCount;
try
{
if (HeaderRowIndex < 0 || !needHeader)
{
headerRow = sheet.GetRow(0) as XSSFRow;
cellCount = headerRow.LastCellNum;
for (int i = headerRow.FirstCellNum; i <= cellCount; i++)
{
DataColumn column = new DataColumn(Convert.ToString(i));
dt.Columns.Add(column);
}
}
else
{
headerRow = sheet.GetRow(HeaderRowIndex) as XSSFRow;
cellCount = headerRow.LastCellNum;
for (int i = headerRow.FirstCellNum; i <= cellCount; i++)
{
ICell cell = headerRow.GetCell(i);
if (cell == null)
{
break;//到最后跳出循环
}
else
{
DataColumn column = new DataColumn(headerRow.GetCell(i).ToString());
dt.Columns.Add(column);
}

}
}
int rowCount = sheet.LastRowNum;
for (int i = HeaderRowIndex + 1; i <= sheet.LastRowNum; i++)
{
XSSFRow row = null;
if (sheet.GetRow(i) == null)
{
row = sheet.CreateRow(i) as XSSFRow;
}
else
{
row = sheet.GetRow(i) as XSSFRow;
}
DataRow dtRow = dt.NewRow();
for (int j = row.FirstCellNum; j <= cellCount; j++)
{
if (row.GetCell(j) != null)
{
switch (row.GetCell(j).CellType)
{
case CellType.Boolean:
dtRow[j] = Convert.ToString(row.GetCell(j).BooleanCellValue);
break;
case CellType.Error:
dtRow[j] = ErrorEval.GetText(row.GetCell(j).ErrorCellValue);
break;
case CellType.Formula:
switch (row.GetCell(j).CachedFormulaResultType)
{

case CellType.Boolean:
dtRow[j] = Convert.ToString(row.GetCell(j).BooleanCellValue);

break;
case CellType.Error:
dtRow[j] = ErrorEval.GetText(row.GetCell(j).ErrorCellValue);

break;
case CellType.Numeric:
dtRow[j] = Convert.ToString(row.GetCell(j).NumericCellValue);

break;
case CellType.String:
string strFORMULA = row.GetCell(j).StringCellValue;
if (strFORMULA != null && strFORMULA.Length > 0)
{
dtRow[j] = strFORMULA.ToString();
}
else
{
dtRow[j] = null;
}
break;
default:
dtRow[j] = "";
break;
}
break;
case CellType.Numeric:
if (DateUtil.IsCellDateFormatted(row.GetCell(j)))
{
dtRow[j] = DateTime.FromOADate(row.GetCell(j).NumericCellValue);
}
else
{
dtRow[j] = Convert.ToDouble(row.GetCell(j).NumericCellValue);
}
break;
case CellType.String:
string str = row.GetCell(j).StringCellValue;
if (!string.IsNullOrEmpty(str))
{

dtRow[j] = Convert.ToString(str);

}
else
{
dtRow[j] = null;
}
break;
default:
dtRow[j] = "";
break;
}

}
}
dt.Rows.Add(dtRow);
}

}
catch (Exception)
{

return null;
}
return dt;
}
/// <summary>
/// 将DataTable中的数据导入Excel文件中
/// </summary>
/// <param name="dt"></param>
/// <param name="file"></param>
public static void DataTable2Excel(DataTable dt, string file, string sheetName)
{
IWorkbook workbook = new XSSFWorkbook();
ISheet sheet = workbook.CreateSheet(sheetName);
IRow header = sheet.CreateRow(0);
for (int i = 0; i < dt.Columns.Count; i++)
{
ICell cell = header.CreateCell(i);
cell.SetCellValue(dt.Columns[i].ColumnName);
}
//数据
for (int i = 0; i < dt.Rows.Count; i++)
{
IRow row = sheet.CreateRow(i + 1);
for (int j = 0; j < dt.Columns.Count; j++)
{
ICell cell = row.CreateCell(j);
cell.SetCellValue(dt.Rows[i][j].ToString());
}
}
MemoryStream stream = new MemoryStream();
workbook.Write(stream);
byte[] buffer = stream.ToArray();
using (FileStream fs = new FileStream(file, FileMode.Create, FileAccess.Write))
{
fs.Write(buffer, 0, buffer.Length);
fs.Flush();
}
}
/// <summary>
/// 获取单元格类型
/// </summary>
/// <param name="cell"></param>
/// <returns></returns>
private static object GetValueType(XSSFCell cell)
{
if (cell == null)
{
return null;
}
switch (cell.CellType)
{
case CellType.Blank:
return null;
case CellType.Boolean:
return cell.BooleanCellValue;
case CellType.Error:
return cell.ErrorCellValue;

case CellType.Numeric:
return cell.NumericCellValue;
case CellType.String:
return cell.StringCellValue;
case CellType.Formula:
default:
return "=" + cell.StringCellValue;
}
}

}
}

NPOIExcelHelper

参考：http://www.cnblogs.com/Joetao/articles/3247909.html

测试结果

导入Excel，student.xlsx

导入DataTable，这里只将数据导入DataTable，导入数据库部分，就不再写了。

测试数据，向qq群里一朋友要的。大概有5w多条，lz机子是老爷机跑不起，只导出了其中的1k条。

方案二

利用office的com组件

首先添加com引用

引入命名空间

using Excel = Microsoft.Office.Interop.Excel;

Com操作Excel辅助类

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Excel = Microsoft.Office.Interop.Excel;
using System.Web.UI;
using System.Web;
using System.Data;
namespace Wolfy.Common
{
/// <summary>
/// 使用com组件操作Excel
/// </summary>
public class ComExcelHelper
{
private Excel.Application appExcel = null;
private Excel.Workbook workbook = null;
private Excel.Worksheet sheet = null;
private DateTime dtBefore;
private DateTime dtAfter;
private string filePath;

public string FilePath
{
get { return filePath; }
set { filePath = value; }
}
private string timestamp;
/// <summary>
/// 以时间字符串作为保存文件的名称
/// </summary>
public string Timestamp
{
get { return timestamp; }
set { timestamp = value; }
}
private object mValue = System.Reflection.Missing.Value;
/// <summary>
///是否打开Excel界面
/// </summary>
public bool Visible
{
set
{
appExcel.Visible = value;
}
}
public ComExcelHelper()
{
this.dtBefore = DateTime.Now;
appExcel = new Excel.Application();
this.dtAfter = DateTime.Now;
this.timestamp = DateTime.Now.ToShortDateString().Replace("-", "") + DateTime.Now.ToShortDateString().Replace("-", "") + DateTime.Now.Second.ToString() + DateTime.Now.Millisecond.ToString();
}
public ComExcelHelper(string strFilePath)
{
this.dtBefore = DateTime.Now;
appExcel = new Excel.Application();
this.dtAfter = DateTime.Now;
this.workbook = (Excel.Workbook)appExcel.Workbooks.Open(strFilePath, mValue, false, mValue, mValue, mValue, mValue, mValue, mValue, mValue, mValue, mValue, mValue, mValue, mValue);
this.timestamp = DateTime.Now.ToShortDateString().Replace("-", "") + DateTime.Now.ToShortDateString().Replace("-", "") + DateTime.Now.Second.ToString() + DateTime.Now.Millisecond.ToString();
}
public void Dispose()
{
try
{
System.Runtime.InteropServices.Marshal.ReleaseComObject(sheet);
sheet = null;
workbook.Close(false, mValue, mValue);
System.Runtime.InteropServices.Marshal.ReleaseComObject(workbook);
workbook = null;
appExcel.Quit();
System.Runtime.InteropServices.Marshal.ReleaseComObject(appExcel);
appExcel = null;
GC.Collect();
GC.WaitForPendingFinalizers();
}
catch (Exception ex)
{
throw ex;
}
finally
{
foreach (System.Diagnostics.Process pro in System.Diagnostics.Process.GetProcessesByName("Excel"))
{
if (pro.StartTime > this.dtBefore && pro.StartTime < this.dtAfter)
{
pro.Kill();
}
}
}
System.GC.SuppressFinalize(this);
}
/// <summary>
/// 加载Excel
/// </summary>
public void Load()
{
if (workbook == null && this.filePath != null)
{
workbook = appExcel.Workbooks.Open(this.filePath, mValue, false, mValue, mValue, mValue, mValue, mValue, mValue, mValue, mValue, mValue, mValue, mValue, mValue);
}
}
/// <summary>
/// 加载Excel
/// </summary>
public void Load(string strFilePath)
{
if (workbook == null)
{
workbook = appExcel.Workbooks.Open(strFilePath, mValue, false, mValue, mValue, mValue, mValue, mValue, mValue, mValue, mValue, mValue, mValue, mValue, mValue);
}
}
/// <summary>
/// 新建工作表
/// </summary>
/// <param name="sheetName"></param>
public void NewWorkSheet(string sheetName)
{
sheet = workbook.Sheets.Add(workbook.Sheets[1], mValue, mValue, mValue);
sheet.Name = sheetName;
}
/// <summary>
/// 在指定的单元格插入指定的值
/// </summary>
/// <param name="strCell">单元格如"A4"</param>
/// <param name="objValue">文本数字等值</param>
public void WriteCell(string strCell, object objValue)
{
sheet.get_Range(strCell, mValue).Value2 = objValue;
}
/// <summary>
/// 在指定Range中插入指定的值
/// </summary>
/// <param name="strStartCell">Range的开始单元格</param>
/// <param name="strEndCell">Range的结束单元格</param>
/// <param name="objValue">文本、数字等值</param>
public void WriteRange(string strStartCell, string strEndCell, object objValue)
{
sheet.get_Range(strStartCell, strEndCell).Value2 = objValue;
}
/**/
/// <summary>
/// 合并单元格，并在合并后的单元格中插入指定的值
/// </summary>
/// <param name="strStartCell"></param>
/// <param name="strEndCell"></param>
/// <param name="objValue"></param>
public void WriteAfterMerge(string strStartCell, string strEndCell, object objValue)
{
sheet.get_Range(strStartCell, strEndCell).Merge(mValue);
sheet.get_Range(strStartCell, mValue).Value2 = objValue;
}

/**/
/// <summary>
/// 在连续单元格中插入一个DataTable中的值
/// </summary>
/// <param name="strStartCell">开始的单元格</param>
/// <param name="dtData">存储数据的DataTable</param>
public void WriteTable(string strStartCell, System.Data.DataTable dtData)
{
object[,] arrData = new object[dtData.Rows.Count, dtData.Columns.Count];

for (int i = 0; i < dtData.Rows.Count; i++)
for (int j = 0; j < dtData.Columns.Count; j++)
arrData[i, j] = dtData.Rows[i][j];

sheet.get_Range(strStartCell, this.GetEndCell(strStartCell, dtData.Rows.Count - 1, dtData.Columns.Count - 1)).Value2 = arrData;

arrData = null;
}

/**/
/// <summary>
/// 在连续单元格中插入一个DataTable并作超级链接
/// </summary>
/// <param name="strStartCell">起始单元格标识符</param>
/// <param name="dtData">存储数据的DataTable</param>
/// <param name="strLinkField">链接的地址字段</param>
/// <param name="strTextField">链接的文本字段</param>
public void WriteTableAndLink(string strStartCell, System.Data.DataTable dtData, string strLinkField, string strTextField)
{
object[,] arrData = new object[dtData.Rows.Count, dtData.Columns.Count - 1];

for (int i = 0; i < dtData.Rows.Count; i++)
{
for (int j = 0; j < dtData.Columns.Count; j++)
{
if (j > dtData.Columns.IndexOf(strLinkField))
arrData[i, j - 1] = dtData.Rows[i][j];
else if (j < dtData.Columns.IndexOf(strLinkField))
arrData[i, j] = dtData.Rows[i][j];
}
}

sheet.get_Range(strStartCell, this.GetEndCell(strStartCell, dtData.Rows.Count - 1, dtData.Columns.Count - 2)).Value2 = arrData;

for (int i = 0; i < dtData.Rows.Count; i++)
this.AddHyperLink(this.NtoL(this.LtoN(this.GetCellLetter(strStartCell)) + dtData.Columns.IndexOf(strTextField)) + System.Convert.ToString(this.GetCellNumber(strStartCell) + i), dtData.Rows[i][strLinkField].ToString() + ".htm", "点击查看详细", dtData.Rows[i][strTextField].ToString());

arrData = null;
}

/**/
/// <summary>
/// 为单元格设置公式
/// </summary>
/// <param name="strCell">单元格标识符</param>
/// <param name="strFormula">公式</param>
public void SetFormula(string strCell, string strFormula)
{
sheet.get_Range(strCell, mValue).Formula = strFormula;
}
/**/
/// <summary>
/// 设置单元格或连续区域的字体为黑体
/// </summary>
/// <param name="strCell">单元格标识符</param>
public void SetBold(string strCell)
{
sheet.get_Range(strCell, mValue).Font.Bold = true;
}

/**/
/// <summary>
/// 设置连续区域的字体为黑体
/// </summary>
/// <param name="strStartCell">开始单元格标识符</param>
/// <param name="strEndCell">结束单元格标识符</param>
public void SetBold(string strStartCell, string strEndCell)
{
sheet.get_Range(strStartCell, strEndCell).Font.Bold = true;
}

/**/
/// <summary>
/// 设置单元格或连续区域的字体颜色
/// </summary>
/// <param name="strCell">单元格标识符</param>
/// <param name="clrColor">颜色</param>
public void SetColor(string strCell, System.Drawing.Color clrColor)
{
sheet.get_Range(strCell, mValue).Font.Color = System.Drawing.ColorTranslator.ToOle(clrColor);
}

/**/
/// <summary>
/// 设置连续区域的字体颜色
/// </summary>
/// <param name="strStartCell">开始单元格标识符</param>
/// <param name="strEndCell">结束单元格标识符</param>
/// <param name="clrColor">颜色</param>
public void SetColor(string strStartCell, string strEndCell, System.Drawing.Color clrColor)
{
sheet.get_Range(strStartCell, strEndCell).Font.Color = System.Drawing.ColorTranslator.ToOle(clrColor);
}

/**/
/// <summary>
/// 设置单元格或连续区域的边框：上下左右都为黑色连续边框
/// </summary>
/// <param name="strCell">单元格标识符</param>
public void SetBorderAll(string strCell)
{
sheet.get_Range(strCell, mValue).Borders[Excel.XlBordersIndex.xlEdgeTop].Color = System.Drawing.ColorTranslator.ToOle(System.Drawing.Color.LightGray);
sheet.get_Range(strCell, mValue).Borders[Excel.XlBordersIndex.xlEdgeTop].LineStyle = Excel.XlLineStyle.xlContinuous;

sheet.get_Range(strCell, mValue).Borders[Excel.XlBordersIndex.xlEdgeBottom].Color = System.Drawing.ColorTranslator.ToOle(System.Drawing.Color.LightGray);
sheet.get_Range(strCell, mValue).Borders[Excel.XlBordersIndex.xlEdgeBottom].LineStyle = Excel.XlLineStyle.xlContinuous;

sheet.get_Range(strCell, mValue).Borders[Excel.XlBordersIndex.xlEdgeLeft].Color = System.Drawing.ColorTranslator.ToOle(System.Drawing.Color.LightGray);
sheet.get_Range(strCell, mValue).Borders[Excel.XlBordersIndex.xlEdgeLeft].LineStyle = Excel.XlLineStyle.xlContinuous;

sheet.get_Range(strCell, mValue).Borders[Excel.XlBordersIndex.xlEdgeRight].Color = System.Drawing.ColorTranslator.ToOle(System.Drawing.Color.LightGray);
sheet.get_Range(strCell, mValue).Borders[Excel.XlBordersIndex.xlEdgeRight].LineStyle = Excel.XlLineStyle.xlContinuous;

sheet.get_Range(strCell, mValue).Borders[Excel.XlBordersIndex.xlInsideHorizontal].Color = System.Drawing.ColorTranslator.ToOle(System.Drawing.Color.LightGray);
sheet.get_Range(strCell, mValue).Borders[Excel.XlBordersIndex.xlInsideHorizontal].LineStyle = Excel.XlLineStyle.xlContinuous;

sheet.get_Range(strCell, mValue).Borders[Excel.XlBordersIndex.xlInsideVertical].Color = System.Drawing.ColorTranslator.ToOle(System.Drawing.Color.LightGray);
sheet.get_Range(strCell, mValue).Borders[Excel.XlBordersIndex.xlInsideVertical].LineStyle = Excel.XlLineStyle.xlContinuous;

}

/**/
/// <summary>
/// 设置连续区域的边框：上下左右都为黑色连续边框
/// </summary>
/// <param name="strStartCell">开始单元格标识符</param>
/// <param name="strEndCell">结束单元格标识符</param>
public void SetBorderAll(string strStartCell, string strEndCell)
{
sheet.get_Range(strStartCell, strEndCell).Borders[Excel.XlBordersIndex.xlEdgeTop].Color = System.Drawing.ColorTranslator.ToOle(System.Drawing.Color.LightGray);
sheet.get_Range(strStartCell, strEndCell).Borders[Excel.XlBordersIndex.xlEdgeTop].LineStyle = Excel.XlLineStyle.xlContinuous;

sheet.get_Range(strStartCell, strEndCell).Borders[Excel.XlBordersIndex.xlEdgeBottom].Color = System.Drawing.ColorTranslator.ToOle(System.Drawing.Color.LightGray);
sheet.get_Range(strStartCell, strEndCell).Borders[Excel.XlBordersIndex.xlEdgeBottom].LineStyle = Excel.XlLineStyle.xlContinuous;

sheet.get_Range(strStartCell, strEndCell).Borders[Excel.XlBordersIndex.xlEdgeLeft].Color = System.Drawing.ColorTranslator.ToOle(System.Drawing.Color.LightGray);
sheet.get_Range(strStartCell, strEndCell).Borders[Excel.XlBordersIndex.xlEdgeLeft].LineStyle = Excel.XlLineStyle.xlContinuous;

sheet.get_Range(strStartCell, strEndCell).Borders[Excel.XlBordersIndex.xlEdgeRight].Color = System.Drawing.ColorTranslator.ToOle(System.Drawing.Color.LightGray);
sheet.get_Range(strStartCell, strEndCell).Borders[Excel.XlBordersIndex.xlEdgeRight].LineStyle = Excel.XlLineStyle.xlContinuous;

sheet.get_Range(strStartCell, strEndCell).Borders[Excel.XlBordersIndex.xlInsideHorizontal].Color = System.Drawing.ColorTranslator.ToOle(System.Drawing.Color.LightGray);
sheet.get_Range(strStartCell, strEndCell).Borders[Excel.XlBordersIndex.xlInsideHorizontal].LineStyle = Excel.XlLineStyle.xlContinuous;

sheet.get_Range(strStartCell, strEndCell).Borders[Excel.XlBordersIndex.xlInsideVertical].Color = System.Drawing.ColorTranslator.ToOle(System.Drawing.Color.LightGray);
sheet.get_Range(strStartCell, strEndCell).Borders[Excel.XlBordersIndex.xlInsideVertical].LineStyle = Excel.XlLineStyle.xlContinuous;
}

/**/
/// <summary>
/// 设置单元格或连续区域水平居左
/// </summary>
/// <param name="strCell">单元格标识符</param>
public void SetHAlignLeft(string strCell)
{
sheet.get_Range(strCell, mValue).HorizontalAlignment = Excel.XlHAlign.xlHAlignLeft;
}

/**/
/// <summary>
/// 设置连续区域水平居左
/// </summary>
/// <param name="strStartCell">开始单元格标识符</param>
/// <param name="strEndCell">结束单元格标识符</param>
public void SetHAlignLeft(string strStartCell, string strEndCell)
{
sheet.get_Range(strStartCell, strEndCell).HorizontalAlignment = Excel.XlHAlign.xlHAlignLeft;
}

/**/
/// <summary>
/// 设置单元格或连续区域水平居左
/// </summary>
/// <param name="strCell">单元格标识符</param>
public void SetHAlignCenter(string strCell)
{
sheet.get_Range(strCell, mValue).HorizontalAlignment = Excel.XlHAlign.xlHAlignCenter;
}

/**/
/// <summary>
/// 设置连续区域水平居中
/// </summary>
/// <param name="strStartCell">开始单元格标识符</param>
/// <param name="strEndCell">结束单元格标识符</param>
public void SetHAlignCenter(string strStartCell, string strEndCell)
{
sheet.get_Range(strStartCell, strEndCell).HorizontalAlignment = Excel.XlHAlign.xlHAlignCenter;
}

/**/
/// <summary>
/// 设置单元格或连续区域水平居右
/// </summary>
/// <param name="strCell">单元格标识符</param>
public void SetHAlignRight(string strCell)
{
sheet.get_Range(strCell, mValue).HorizontalAlignment = Excel.XlHAlign.xlHAlignRight;
}

/**/
/// <summary>
/// 设置连续区域水平居右
/// </summary>
/// <param name="strStartCell">开始单元格标识符</param>
/// <param name="strEndCell">结束单元格标识符</param>
public void SetHAlignRight(string strStartCell, string strEndCell)
{
sheet.get_Range(strStartCell, strEndCell).HorizontalAlignment = Excel.XlHAlign.xlHAlignRight;
}

/**/
/// <summary>
/// 设置单元格或连续区域的显示格式
/// </summary>
/// <param name="strCell">单元格标识符</param>
/// <param name="strNF">如"#,##0.00"的显示格式</param>
public void SetNumberFormat(string strCell, string strNF)
{
sheet.get_Range(strCell, mValue).NumberFormat = strNF;
}

/**/
/// <summary>
/// 设置连续区域的显示格式
/// </summary>
/// <param name="strStartCell">开始单元格标识符</param>
/// <param name="strEndCell">结束单元格标识符</param>
/// <param name="strNF">如"#,##0.00"的显示格式</param>
public void SetNumberFormat(string strStartCell, string strEndCell, string strNF)
{
sheet.get_Range(strStartCell, strEndCell).NumberFormat = strNF;
}

/**/
/// <summary>
/// 设置单元格或连续区域的字体大小
/// </summary>
/// <param name="strCell">单元格或连续区域标识符</param>
/// <param name="intFontSize"></param>
public void SetFontSize(string strCell, int intFontSize)
{
sheet.get_Range(strCell, mValue).Font.Size = intFontSize.ToString();
}

/**/
/// <summary>
/// 设置连续区域的字体大小
/// </summary>
/// <param name="strStartCell">开始单元格标识符</param>
/// <param name="strEndCell">结束单元格标识符</param>
/// <param name="intFontSize">字体大小</param>
public void SetFontSize(string strStartCell, string strEndCell, int intFontSize)
{
sheet.get_Range(strStartCell, strEndCell).Font.Size = intFontSize.ToString();
}

/**/
/// <summary>
/// 设置列宽
/// </summary>
/// <param name="strColID">列标识，如A代表第一列</param>
/// <param name="decWidth">宽度</param>
public void SetColumnWidth(string strColID, double dblWidth)
{
((Excel.Range)sheet.Columns.GetType().InvokeMember("Item", System.Reflection.BindingFlags.GetProperty, null, sheet.Columns, new object[] { (strColID + ":" + strColID).ToString() })).ColumnWidth = dblWidth;
}

/**/
/// <summary>
/// 为单元格添加超级链接
/// </summary>
/// <param name="strCell">单元格标识符</param>
/// <param name="strAddress">链接地址</param>
/// <param name="strTip">屏幕提示</param>
/// <param name="strText">链接文本</param>
public void AddHyperLink(string strCell, string strAddress, string strTip, string strText)
{
sheet.Hyperlinks.Add(sheet.get_Range(strCell, mValue), strAddress, mValue, strTip, strText);
}

/**/
/// <summary>
/// 已知开始的单元格标识，求intR行、intColumn列后的单元格标识
/// </summary>
/// <param name="strStartCell">开始单元格标识</param>
/// <param name="intR">行数</param>
/// <param name="intC">列数</param>
/// <returns>单元格标识符结果</returns>
public string GetEndCell(string strStartCell, int intR, int intC)
{
string endcell = string.Empty;
System.Text.RegularExpressions.Regex regex = new System.Text.RegularExpressions.Regex(@"^(?<vLetter>[A-Z]+)(?<vNumber>\d+)");
if (regex.IsMatch(strStartCell))
{
endcell = this.NtoL(this.LtoN(regex.Match(strStartCell).Result("${vLetter}")) + intC) + System.Convert.ToString((System.Convert.ToInt32(regex.Match(strStartCell).Result("${vNumber}")) + intR));
}
return endcell;

}

/**/
/// <summary>
/// 获取单元格标识符中的字母
/// </summary>
/// <param name="strCell">单元格标识符</param>
/// <returns>单元格标识符对应的字母</returns>
public string GetCellLetter(string strCell)
{
System.Text.RegularExpressions.Regex regex = new System.Text.RegularExpressions.Regex(@"^(?<vLetter>[A-Z]+)(?<vNumber>\d+)");
return regex.Match(strCell).Result("${vLetter}");
}

/**/
/// <summary>
/// 获取单元格标识符中的数字
/// </summary>
/// <param name="strCell">单元格标识符</param>
public int GetCellNumber(string strCell)
{
System.Text.RegularExpressions.Regex regex = new System.Text.RegularExpressions.Regex(@"^(?<vLetter>[A-Z]+)(?<vNumber>\d+)");
return System.Convert.ToInt32(regex.Match(strCell).Result("${vNumber}"));
}

/**/
/// <summary>
/// 另存为xls文件
/// </summary>
/// <param name="strFilePath">文件路径</param>
public void SaveAs(string strFilePath)
{
workbook.SaveCopyAs(strFilePath);

}

/**/
/// <summary>
/// 另存为xls文件
/// </summary>
/// <param name="strFilePath">文件路径</param>
public void Save()
{
workbook.Save();

}
/// <summary>
/// 将Excel中的数据读入DataTable中
/// </summary>
/// <param name="filePath">excel文件的路径</param>
/// <param name="dtName">datatable的名字</param>
/// <param name="headName">表头，以逗号分隔</param>
/// <returns></returns>
public DataTable ReadExcel2DataTable(string filePath, string dtName, string headName)
{
workbook = this.appExcel.Workbooks.Open(filePath, mValue, mValue, mValue, mValue, mValue, mValue, mValue, mValue, mValue, mValue, mValue, mValue, mValue, mValue);
sheet = workbook.Worksheets.get_Item(1);
DataTable dt = new DataTable(dtName);
string[] heads = !string.IsNullOrEmpty(headName) ? headName.Split(',') : null;
if (heads != null)
{
for (int i = 0; i < heads.Length; i++)
{
DataColumn column = new DataColumn(heads[i]);
//这里没对类型进行处理
dt.Columns.Add(column);
}
for (int i = 0; i <= sheet.UsedRange.Rows.Count; i++)
{
DataRow dr = dt.NewRow();
for (int j = 0; j < heads.Length; j++)
{
string cellString = NtoL(j + 1);
dr[heads[j]] = sheet.get_Range(cellString + (i + 1)).Value2;

}
dt.Rows.Add(dr);

}
}
else
{
for (int i = 0; i <= sheet.UsedRange.Rows.Count; i++)
{
DataRow dr = dt.NewRow();
for (int j = 0; j <= sheet.UsedRange.Columns.Count; j++)
{
dr[j + 1] = sheet.get_Range(NtoL(j + 1) + (i + 1)).Value2;
}
dt.Rows.Add(dr);
}
}
return dt;
}
/**/
/// <summary>
/// 另存为html文件
/// </summary>
/// <param name="strFilePath">文件路径</param>
public void SaveHtml(string strFilePath)
{
workbook.SaveAs(strFilePath, Excel.XlFileFormat.xlHtml, mValue, mValue, mValue, mValue, Excel.XlSaveAsAccessMode.xlNoChange, mValue, mValue, mValue, mValue, mValue);
}

public void CreateHtmlFile()
{

}

/**/
/// <summary>
/// 字母转换为数字，Excel列头，如A-1;AA-27
/// </summary>
/// <param name="strLetter">字母</param>
/// <returns>字母对应的数字</returns>
private int LtoN(string strLetter)
{
int intRtn = 0;

string strLetters = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";

if (strLetter.Length == 2)
intRtn += (strLetters.IndexOf(strLetter.Substring(0, 1)) + 1) * 26;

intRtn += strLetters.IndexOf(strLetter.Substring(strLetter.Length - 1, 1)) + 1;

return intRtn;

}

/**/
/// <summary>
/// 数字转换为字母，Excel列头，如1-A;27-AA
/// </summary>
/// <param name="intNumber">数字</param>
/// <returns>数字对应的字母</returns>
private string NtoL(int intNumber)
{
if (intNumber > 702)
return String.Empty;

if (intNumber == 702)
return "ZZ";

string strRtn = String.Empty;

string strLetters = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";

if (intNumber > 26)
strRtn = strLetters.Substring(intNumber / 26 - 1, 1);

strRtn += strLetters.Substring((intNumber % 26) - 1, 1);

return strRtn;
}

}
}

ComExcelHelper

参考：http://www.cnblogs.com/waxdoll/archive/2005/10/28/264071.html

DataTable导入Excel

Excel读入DataTable

这里未对类型进行处理，datetime类型的数据会转换成数值类型的

方案三

将Excel数据表当作数据源，通过 OleDb来实现。

同样需要引入Microsoft Excel 14.0 Object Library

分享一个操作类：

using System;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.Data.OleDb;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace Wolfy.Common
{
class OleDbExcelHelper
{
#region 数据导出至Excel文件
/// </summary>
/// 导出Excel文件，自动返回可下载的文件流
/// </summary>
public static void DataTable1Excel(System.Data.DataTable dtData)
{
GridView gvExport = null;
HttpContext curContext = HttpContext.Current;
StringWriter strWriter = null;
HtmlTextWriter htmlWriter = null;
if (dtData != null)
{
curContext.Response.ContentType = "application/vnd.ms-excel";
curContext.Response.ContentEncoding = System.Text.Encoding.GetEncoding("gb2312");
curContext.Response.Charset = "utf-8";
strWriter = new StringWriter();
htmlWriter = new HtmlTextWriter(strWriter);
gvExport = new GridView();
gvExport.DataSource = dtData.DefaultView;
gvExport.AllowPaging = false;
gvExport.DataBind();
gvExport.RenderControl(htmlWriter);
curContext.Response.Write("<meta http-equiv=\"Content-Type\" content=\"text/html;charset=gb2312\"/>" + strWriter.ToString());
curContext.Response.End();
}
}

/// <summary>
/// 导出Excel文件，转换为可读模式
/// </summary>
public static void DataTable2Excel(System.Data.DataTable dtData)
{
DataGrid dgExport = null;
HttpContext curContext = HttpContext.Current;
StringWriter strWriter = null;
HtmlTextWriter htmlWriter = null;

if (dtData != null)
{
curContext.Response.ContentType = "application/vnd.ms-excel";
curContext.Response.ContentEncoding = System.Text.Encoding.UTF8;
curContext.Response.Charset = "";
strWriter = new StringWriter();
htmlWriter = new HtmlTextWriter(strWriter);
dgExport = new DataGrid();
dgExport.DataSource = dtData.DefaultView;
dgExport.AllowPaging = false;
dgExport.DataBind();
dgExport.RenderControl(htmlWriter);
curContext.Response.Write(strWriter.ToString());
curContext.Response.End();
}
}

/// <summary>
/// 导出Excel文件，并自定义文件名
/// </summary>
public static void DataTable3Excel(System.Data.DataTable dtData, String FileName)
{
GridView dgExport = null;
HttpContext curContext = HttpContext.Current;
StringWriter strWriter = null;
HtmlTextWriter htmlWriter = null;

if (dtData != null)
{
HttpUtility.UrlEncode(FileName, System.Text.Encoding.UTF8);
curContext.Response.AddHeader("content-disposition", "attachment;filename=" + HttpUtility.UrlEncode(FileName, System.Text.Encoding.UTF8) + ".xls");
curContext.Response.ContentType = "application nd.ms-excel";
curContext.Response.ContentEncoding = System.Text.Encoding.UTF8;
curContext.Response.Charset = "GB2312";
strWriter = new StringWriter();
htmlWriter = new HtmlTextWriter(strWriter);
dgExport = new GridView();
dgExport.DataSource = dtData.DefaultView;
dgExport.AllowPaging = false;
dgExport.DataBind();
dgExport.RenderControl(htmlWriter);
curContext.Response.Write(strWriter.ToString());
curContext.Response.End();
}
}

/// <summary>
/// 将数据导出至Excel文件
/// </summary>
/// <param name="Table">DataTable对象</param>
/// <param name="ExcelFilePath">Excel文件路径</param>
public static bool OutputToExcel(System.Data.DataTable Table, string ExcelFilePath)
{
if (File.Exists(ExcelFilePath))
{
throw new Exception("该文件已经存在！");
}

if ((Table.TableName.Trim().Length == 0) || (Table.TableName.ToLower() == "table"))
{
Table.TableName = "Sheet1";
}

//数据表的列数
int ColCount = Table.Columns.Count;

//用于记数，实例化参数时的序号
int i = 0;

//创建参数
OleDbParameter[] para = new OleDbParameter[ColCount];

//创建表结构的SQL语句
string TableStructStr = @"Create Table " + Table.TableName + "(";

//连接字符串
string connString = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + ExcelFilePath + ";Extended Properties=Excel 8.0;";
OleDbConnection objConn = new OleDbConnection(connString);

//创建表结构
OleDbCommand objCmd = new OleDbCommand();

//数据类型集合
ArrayList DataTypeList = new ArrayList();
DataTypeList.Add("System.Decimal");
DataTypeList.Add("System.Double");
DataTypeList.Add("System.Int16");
DataTypeList.Add("System.Int32");
DataTypeList.Add("System.Int64");
DataTypeList.Add("System.Single");

//遍历数据表的所有列，用于创建表结构
foreach (DataColumn col in Table.Columns)
{
//如果列属于数字列，则设置该列的数据类型为double
if (DataTypeList.IndexOf(col.DataType.ToString()) >= 0)
{
para[i] = new OleDbParameter("@" + col.ColumnName, OleDbType.Double);
objCmd.Parameters.Add(para[i]);

//如果是最后一列
if (i + 1 == ColCount)
{
TableStructStr += col.ColumnName + " double)";
}
else
{
TableStructStr += col.ColumnName + " double,";
}
}
else
{
para[i] = new OleDbParameter("@" + col.ColumnName, OleDbType.VarChar);
objCmd.Parameters.Add(para[i]);

//如果是最后一列
if (i + 1 == ColCount)
{
TableStructStr += col.ColumnName + " varchar)";
}
else
{
TableStructStr += col.ColumnName + " varchar,";
}
}
i++;
}

//创建Excel文件及文件结构
try
{
objCmd.Connection = objConn;
objCmd.CommandText = TableStructStr;

if (objConn.State == ConnectionState.Closed)
{
objConn.Open();
}
objCmd.ExecuteNonQuery();
}
catch (Exception exp)
{
throw exp;
}

//插入记录的SQL语句
string InsertSql_1 = "Insert into " + Table.TableName + " (";
string InsertSql_2 = " Values (";
string InsertSql = "";

//遍历所有列，用于插入记录，在此创建插入记录的SQL语句
for (int colID = 0; colID < ColCount; colID++)
{
if (colID + 1 == ColCount) //最后一列
{
InsertSql_1 += Table.Columns[colID].ColumnName + ")";
InsertSql_2 += "@" + Table.Columns[colID].ColumnName + ")";
}
else
{
InsertSql_1 += Table.Columns[colID].ColumnName + ",";
InsertSql_2 += "@" + Table.Columns[colID].ColumnName + ",";
}
}

InsertSql = InsertSql_1 + InsertSql_2;

//遍历数据表的所有数据行
for (int rowID = 0; rowID < Table.Rows.Count; rowID++)
{
for (int colID = 0; colID < ColCount; colID++)
{
if (para[colID].DbType == DbType.Double && Table.Rows[rowID][colID].ToString().Trim() == "")
{
para[colID].Value = 0;
}
else
{
para[colID].Value = Table.Rows[rowID][colID].ToString().Trim();
}
}
try
{
objCmd.CommandText = InsertSql;
objCmd.ExecuteNonQuery();
}
catch (Exception exp)
{
string str = exp.Message;
}
}
try
{
if (objConn.State == ConnectionState.Open)
{
objConn.Close();
}
}
catch (Exception exp)
{
throw exp;
}
return true;
}

/// <summary>
/// 将数据导出至Excel文件
/// </summary>
/// <param name="Table">DataTable对象</param>
/// <param name="Columns">要导出的数据列集合</param>
/// <param name="ExcelFilePath">Excel文件路径</param>
public static bool OutputToExcel(System.Data.DataTable Table, ArrayList Columns, string ExcelFilePath)
{
if (File.Exists(ExcelFilePath))
{
throw new Exception("该文件已经存在！");
}

//如果数据列数大于表的列数，取数据表的所有列
if (Columns.Count > Table.Columns.Count)
{
for (int s = Table.Columns.Count + 1; s <= Columns.Count; s++)
{
Columns.RemoveAt(s); //移除数据表列数后的所有列
}
}

//遍历所有的数据列，如果有数据列的数据类型不是 DataColumn，则将它移除
DataColumn column = new DataColumn();
for (int j = 0; j < Columns.Count; j++)
{
try
{
column = (DataColumn)Columns[j];
}
catch (Exception)
{
Columns.RemoveAt(j);
}
}
if ((Table.TableName.Trim().Length == 0) || (Table.TableName.ToLower() == "table"))
{
Table.TableName = "Sheet1";
}

//数据表的列数
int ColCount = Columns.Count;

//创建参数
OleDbParameter[] para = new OleDbParameter[ColCount];

//创建表结构的SQL语句
string TableStructStr = @"Create Table " + Table.TableName + "(";

//连接字符串
string connString = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + ExcelFilePath + ";Extended Properties=Excel 8.0;";
OleDbConnection objConn = new OleDbConnection(connString);

//创建表结构
OleDbCommand objCmd = new OleDbCommand();

DataColumn col = new DataColumn();

//遍历数据表的所有列，用于创建表结构
for (int k = 0; k < ColCount; k++)
{
col = (DataColumn)Columns[k];

//列的数据类型是数字型
if (DataTypeList.IndexOf(col.DataType.ToString().Trim()) >= 0)
{
para[k] = new OleDbParameter("@" + col.Caption.Trim(), OleDbType.Double);
objCmd.Parameters.Add(para[k]);

//如果是最后一列
if (k + 1 == ColCount)
{
TableStructStr += col.Caption.Trim() + " Double)";
}
else
{
TableStructStr += col.Caption.Trim() + " Double,";
}
}
else
{
para[k] = new OleDbParameter("@" + col.Caption.Trim(), OleDbType.VarChar);
objCmd.Parameters.Add(para[k]);

//如果是最后一列
if (k + 1 == ColCount)
{
TableStructStr += col.Caption.Trim() + " VarChar)";
}
else
{
TableStructStr += col.Caption.Trim() + " VarChar,";
}
}
}

//创建Excel文件及文件结构
try
{
objCmd.Connection = objConn;
objCmd.CommandText = TableStructStr;

if (objConn.State == ConnectionState.Closed)
{
objConn.Open();
}
objCmd.ExecuteNonQuery();
}
catch (Exception exp)
{
throw exp;
}

//插入记录的SQL语句
string InsertSql_1 = "Insert into " + Table.TableName + " (";
string InsertSql_2 = " Values (";
string InsertSql = "";

//遍历所有列，用于插入记录，在此创建插入记录的SQL语句
for (int colID = 0; colID < ColCount; colID++)
{
if (colID + 1 == ColCount) //最后一列
{
InsertSql_1 += Columns[colID].ToString().Trim() + ")";
InsertSql_2 += "@" + Columns[colID].ToString().Trim() + ")";
}
else
{
InsertSql_1 += Columns[colID].ToString().Trim() + ",";
InsertSql_2 += "@" + Columns[colID].ToString().Trim() + ",";
}
}

InsertSql = InsertSql_1 + InsertSql_2;

//遍历数据表的所有数据行
DataColumn DataCol = new DataColumn();
for (int rowID = 0; rowID < Table.Rows.Count; rowID++)
{
for (int colID = 0; colID < ColCount; colID++)
{
//因为列不连续，所以在取得单元格时不能用行列编号，列需得用列的名称
DataCol = (DataColumn)Columns[colID];
if (para[colID].DbType == DbType.Double && Table.Rows[rowID][DataCol.Caption].ToString().Trim() == "")
{
para[colID].Value = 0;
}
else
{
para[colID].Value = Table.Rows[rowID][DataCol.Caption].ToString().Trim();
}
}
try
{
objCmd.CommandText = InsertSql;
objCmd.ExecuteNonQuery();
}
catch (Exception exp)
{
string str = exp.Message;
}
}
try
{
if (objConn.State == ConnectionState.Open)
{
objConn.Close();
}
}
catch (Exception exp)
{
throw exp;
}
return true;
}
#endregion

/// <summary>
/// 获取Excel文件数据表列表
/// </summary>
public static ArrayList GetExcelTables(string ExcelFileName)
{
System.Data.DataTable dt = new System.Data.DataTable();
ArrayList TablesList = new ArrayList();
if (File.Exists(ExcelFileName))
{
using (OleDbConnection conn = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Extended Properties=Excel 8.0;Data Source=" + ExcelFileName))
{
try
{
conn.Open();
dt = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, new object[] { null, null, null, "TABLE" });
}
catch (Exception exp)
{
throw exp;
}

//获取数据表个数
int tablecount = dt.Rows.Count;
for (int i = 0; i < tablecount; i++)
{
string tablename = dt.Rows[i][2].ToString().Trim().TrimEnd('$');
if (TablesList.IndexOf(tablename) < 0)
{
TablesList.Add(tablename);
}
}
}
}
return TablesList;
}

/// <summary>
/// 将Excel文件导出至DataTable(第一行作为表头)
/// </summary>
/// <param name="ExcelFilePath">Excel文件路径</param>
/// <param name="TableName">数据表名，如果数据表名错误，默认为第一个数据表名</param>
public static DataTable InputFromExcel(string ExcelFilePath, string TableName)
{
if (!File.Exists(ExcelFilePath))
{
throw new Exception("Excel文件不存在！");
}

//如果数据表名不存在，则数据表名为Excel文件的第一个数据表
ArrayList TableList = new ArrayList();
TableList = GetExcelTables(ExcelFilePath);

if (TableName.IndexOf(TableName) < 0)
{
TableName = TableList[0].ToString().Trim();
}

DataTable table = new DataTable();
OleDbConnection dbcon = new OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + ExcelFilePath + ";Extended Properties=Excel 8.0");
OleDbCommand cmd = new OleDbCommand("select * from [" + TableName + "$]", dbcon);
OleDbDataAdapter adapter = new OleDbDataAdapter(cmd);

try
{
if (dbcon.State == ConnectionState.Closed)
{
dbcon.Open();
}
adapter.Fill(table);
}
catch (Exception exp)
{
throw exp;
}
finally
{
if (dbcon.State == ConnectionState.Open)
{
dbcon.Close();
}
}
return table;
}

/// <summary>
/// 获取Excel文件指定数据表的数据列表
/// </summary>
/// <param name="ExcelFileName">Excel文件名</param>
/// <param name="TableName">数据表名</param>
public static ArrayList GetExcelTableColumns(string ExcelFileName, string TableName)
{
DataTable dt = new DataTable();
ArrayList ColsList = new ArrayList();
if (File.Exists(ExcelFileName))
{
using (OleDbConnection conn = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Extended Properties=Excel 8.0;Data Source=" + ExcelFileName))
{
conn.Open();
dt = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Columns, new object[] { null, null, TableName, null });

//获取列个数
int colcount = dt.Rows.Count;
for (int i = 0; i < colcount; i++)
{
string colname = dt.Rows[i]["Column_Name"].ToString().Trim();
ColsList.Add(colname);
}
}
}
return ColsList;
}
}
}

OleDbExcelHelper

网上搜集的常用类，这里不再测试。

方案四

将Excel另存为xml文件，对xml文件进行操作。

 1 <Row>
 2     <Cell><Data ss:Type="String">998</Data></Cell>
 3     <Cell><Data ss:Type="String">柳雪巧</Data></Cell>
 4     <Cell><Data ss:Type="String">f</Data></Cell>
 5     <Cell><Data ss:Type="String">1971/4/30 0:00:00</Data></Cell>
 6     <Cell><Data ss:Type="String">2005/1/15 0:00:00</Data></Cell>
 7     <Cell><Data ss:Type="String">台湾省  屏东县</Data></Cell>
 8     <Cell><Data ss:Type="String">Dolores19710430@139.com</Data></Cell>
 9     <Cell><Data ss:Type="String">12616310511</Data></Cell>
10     <Cell><Data ss:Type="String">False</Data></Cell>
11     <Cell><Data ss:Type="String">2014/3/15 10:13:54</Data></Cell>
12     <Cell><Data ss:Type="String">5</Data></Cell>
13    </Row>

excel表格中每一行数据，其实是以上格式的xml，有规律，就可以很容易的去解析。

方案五

js插件

官网地址：http://datatables.net/extras/tabletools/

方案六

导出为csv文件

分享一个辅助类

using System.Data;
using System.IO;

public static class CsvHelper
{
/// <summary>
/// 导出报表为Csv
/// </summary>
/// <param name="dt">DataTable</param>
/// <param name="strFilePath">物理路径</param>
/// <param name="tableheader">表头</param>
/// <param name="columname">字段标题,逗号分隔</param>
public static bool dt2csv(DataTable dt, string strFilePath, string tableheader, string columname)
{
try
{
string strBufferLine = "";
StreamWriter strmWriterObj = new StreamWriter(strFilePath,false,System.Text.Encoding.UTF8);
strmWriterObj.WriteLine(tableheader);
strmWriterObj.WriteLine(columname);
for (int i = 0; i < dt.Rows.Count; i++)
{
strBufferLine = "";
for (int j = 0; j < dt.Columns.Count; j++)
{
if (j > 0)
strBufferLine += ",";
strBufferLine += dt.Rows[i][j].ToString();
}
strmWriterObj.WriteLine(strBufferLine);
}
strmWriterObj.Close();
return true;
}
catch
{
return false;
}
}

/// <summary>
/// 将Csv读入DataTable
/// </summary>
/// <param name="filePath">csv文件路径</param>
/// <param name="n">表示第n行是字段title,第n+1行是记录开始</param>
public static DataTable csv2dt(string filePath, int n, DataTable dt)
{
StreamReader reader = new StreamReader(filePath, System.Text.Encoding.UTF8, false);
int i = 0, m = 0;
reader.Peek();
while (reader.Peek() > 0)
{
m = m + 1;
string str = reader.ReadLine();
if (m >= n + 1)
{
string[] split = str.Split(',');

System.Data.DataRow dr = dt.NewRow();
for (i = 0; i < split.Length; i++)
{
dr[i] = split[i];
}
dt.Rows.Add(dr);
}
}
return dt;
}
}

不再测试。