using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using NPOI.SS.UserModel;
using NPOI.XSSF.UserModel;
using NPOI.HSSF.UserModel;
using System.IO;
using System.Data;
using NPOI.SS.Util;
using NPOI.HSSF.Util;// 列 namespace Common.Utility
{
public class ExcelHelper : IDisposable
{
private string fileName = null; //文件名
private IWorkbook workbook = null;
private FileStream fs = null;
private bool disposed; public ExcelHelper(string fileName)
{
this.fileName = fileName;
disposed = false;
} /// <summary>
/// 将DataTable数据导入到excel中
/// </summary>
/// <param name="data">要导入的数据</param>
/// <param name="isColumnWritten">DataTable的列名是否要导入</param>
/// <param name="sheetName">要导入的excel的sheet的名称</param>
/// <returns>导入数据行数(包含列名那一行)</returns>
public int DataTableToExcel(DataTable data, string sheetName, bool isColumnWritten,string args="")
{
int i = 0;
int j = 0;
int count = 0;
ISheet sheet = null; fs = new FileStream(fileName, FileMode.OpenOrCreate, FileAccess.ReadWrite);
if (fileName.IndexOf(".xlsx") > 0) // 2007版本
workbook = new XSSFWorkbook();
else if (fileName.IndexOf(".xls") > 0) // 2003版本
workbook = new HSSFWorkbook(); try
{
if (workbook != null)
{
sheet = workbook.CreateSheet(sheetName);
}
else
{
return -1;
} if (isColumnWritten == true) //写入DataTable的列名
{
IRow row = sheet.CreateRow(0);
for (j = 0; j < data.Columns.Count; ++j)
{
row.CreateCell(j).SetCellValue(data.Columns[j].ColumnName);
}
count = 1;
}
else
{
count = 0;
} for (i = 0; i < data.Rows.Count; ++i)
{
IRow row = sheet.CreateRow(count);
for (j = 0; j < data.Columns.Count; ++j)
{
row.CreateCell(j).SetCellValue(data.Rows[i][j].ToString());
if (args == "export_code" && data.Rows[i][j].ToString()=="合计")
{ SetCellRangeAddress(sheet, i + 1, i + 1, 0, 3);
IRow row_1 = sheet.GetRow(i + 1);
ICell cell = row_1.GetCell(0);
ICellStyle cellstyle = workbook.CreateCellStyle();//设置垂直居中格式
cellstyle.VerticalAlignment = VerticalAlignment.Justify;//垂直居中
cellstyle.Alignment = HorizontalAlignment.Center;
cell.CellStyle = cellstyle; }
}
++count;
}
if (args == "export_code")
{
var oldCode = "";
int n = 0;
for (i = 0; i < data.Rows.Count; ++i)
{
var code = data.Rows[i][1];
if (oldCode == "")
{
oldCode = code.ToString();
n = i;
}
if (oldCode != code.ToString())
{ SetCellRangeAddress(sheet, n + 1, i, 1, 1);
IRow row = sheet.GetRow(n + 1);
ICell cell = row.GetCell(1);
ICellStyle cellstyle = workbook.CreateCellStyle();//设置垂直居中格式
cellstyle.VerticalAlignment = VerticalAlignment.Justify;//垂直居中
cellstyle.Alignment = HorizontalAlignment.Center;
cell.CellStyle = cellstyle; }
if (data.Rows[i][4].ToString() == "合计")
{
oldCode = "";
}
}
} workbook.Write(fs); //写入到excel
return count;
}
catch (Exception ex)
{
Console.WriteLine("Exception: " + ex.Message);
return -1;
}
} #region
/// <summary>
/// 获取单元格样式
/// </summary>
/// <param name="hssfworkbook">Excel操作类</param>
/// <param name="font">单元格字体</param>
/// <param name="fillForegroundColor">图案的颜色</param>
/// <param name="fillPattern">图案样式</param>
/// <param name="fillBackgroundColor">单元格背景</param>
/// <param name="ha">垂直对齐方式</param>
/// <param name="va">垂直对齐方式</param>
/// <returns></returns>
public static ICellStyle GetCellStyle(HSSFWorkbook hssfworkbook, HSSFColor fillBackgroundColor, HorizontalAlignment ha, VerticalAlignment va)
{
ICellStyle cellstyle = hssfworkbook.CreateCellStyle();
cellstyle.Alignment = ha;
cellstyle.VerticalAlignment = va;
if (fillBackgroundColor != null)
{
cellstyle.FillBackgroundColor = fillBackgroundColor.GetIndex();
}
return cellstyle;
}
/// <summary>
/// 合并单元格
/// </summary>
/// <param name="sheet">要合并单元格所在的sheet</param>
/// <param name="rowstart">开始行的索引</param>
/// <param name="rowend">结束行的索引</param>
/// <param name="colstart">开始列的索引</param>
/// <param name="colend">结束列的索引</param>
public static void SetCellRangeAddress(ISheet sheet, int rowstart, int rowend, int colstart, int colend)
{
CellRangeAddress cellRangeAddress = new CellRangeAddress(rowstart, rowend, colstart, colend);
sheet.AddMergedRegion(cellRangeAddress);
} #endregion /// <summary>
/// 将excel中的数据导入到DataTable中
/// </summary>
/// <param name="sheetName">excel工作薄sheet的名称</param>
/// <param name="isFirstRowColumn">第一行是否是DataTable的列名</param>
/// <returns>返回的DataTable</returns>
public DataTable ExcelToDataTable(string sheetName, bool isFirstRowColumn)
{
ISheet sheet = null;
DataTable data = new DataTable();
int startRow = 0;
try
{
fs = new FileStream(fileName, FileMode.Open, FileAccess.Read);
if (fileName.IndexOf(".xlsx") > 0) // 2007版本
workbook = new XSSFWorkbook(fs);
else if (fileName.IndexOf(".xls") > 0) // 2003版本
workbook = new HSSFWorkbook(fs); if (sheetName != null)
{
sheet = workbook.GetSheet(sheetName);
if (sheet == null) //如果没有找到指定的sheetName对应的sheet，则尝试获取第一个sheet
{
sheet = workbook.GetSheetAt(0);
}
}
else
{
sheet = workbook.GetSheetAt(0);
}
if (sheet != null)
{
IRow firstRow = sheet.GetRow(0);
int cellCount = firstRow.LastCellNum; //一行最后一个cell的编号 即总的列数 if (isFirstRowColumn)
{
for (int i = firstRow.FirstCellNum; i < cellCount; ++i)
{
ICell cell = firstRow.GetCell(i);
if (cell != null)
{
string cellValue = cell.StringCellValue;
if (cellValue != null)
{
DataColumn column = new DataColumn(cellValue);
data.Columns.Add(column);
}
}
}
startRow = sheet.FirstRowNum + 1;
}
else
{
startRow = sheet.FirstRowNum;
} //最后一列的标号
int rowCount = sheet.LastRowNum;
ICell tempcell = null;
for (int i = startRow; i <= rowCount; ++i)
{
IRow row = sheet.GetRow(i);
if (row == null) continue; //没有数据的行默认是null DataRow dataRow = data.NewRow();
for (int j = row.FirstCellNum; j < cellCount; ++j)
{
tempcell = row.GetCell(j);
if (tempcell != null) //同理，没有数据的单元格都默认是null
{
switch (tempcell.CellType)
{
case CellType.Blank:
dataRow[j] = "";
break;
case CellType.String:
dataRow[j] = tempcell.StringCellValue;
break;
case CellType.Numeric:
dataRow[j] = tempcell.NumericCellValue;
break;
case CellType.Formula:
dataRow[j] = tempcell.NumericCellValue;
break;
default:
dataRow[j] = "";
break;
}
}
}
data.Rows.Add(dataRow);
}
} return data;
}
catch (Exception ex)
{
Console.WriteLine("Exception: " + ex.Message);
throw ex;
//return null;
}
} /// <summary>
/// 将excel中的数据导入到DataTable中,增加多个sheet的情况
/// </summary>
/// <param name="sheetName">excel工作薄sheet的名称</param>
/// <param name="isFirstRowColumn">第一行是否是DataTable的列名</param>
/// <returns>返回的DataTable</returns>
public DataTable ExcelToDataTable(int sheetIndex, bool isFirstRowColumn)
{
ISheet sheet = null;
DataTable data = new DataTable();
int startRow = 0;
try
{
fs = new FileStream(fileName, FileMode.Open, FileAccess.Read);
if (fileName.IndexOf(".xlsx") > 0) // 2007版本
workbook = new XSSFWorkbook(fs);
else if (fileName.IndexOf(".xls") > 0) // 2003版本
workbook = new HSSFWorkbook(fs); sheet = workbook.GetSheetAt(sheetIndex);
if (sheet != null)
{
IRow firstRow = sheet.GetRow(0);
int cellCount = firstRow.LastCellNum; //一行最后一个cell的编号 即总的列数
if (isFirstRowColumn)
{
for (int i = firstRow.FirstCellNum; i < cellCount; ++i)
{
ICell cell = firstRow.GetCell(i);
if (cell != null)
{
string cellValue = cell.StringCellValue;
if (cellValue != null)
{
DataColumn column = new DataColumn(cellValue);
data.Columns.Add(column);
}
}
}
startRow = sheet.FirstRowNum + 1;
}
else
{
startRow = sheet.FirstRowNum;
} //最后一列的标号
int rowCount = sheet.LastRowNum;
ICell tempcell = null;
for (int i = startRow; i <= rowCount; ++i)
{
IRow row = sheet.GetRow(i);
if (row == null) continue; //没有数据的行默认是null DataRow dataRow = data.NewRow();
for (int j = row.FirstCellNum; j < cellCount; ++j)
{
tempcell = row.GetCell(j);
if (tempcell != null) //同理，没有数据的单元格都默认是null
{
switch (tempcell.CellType)
{
case CellType.Blank:
dataRow[j] = "";
break;
case CellType.String:
dataRow[j] = tempcell.StringCellValue;
break;
case CellType.Numeric:
dataRow[j] = tempcell.NumericCellValue;
break;
case CellType.Formula:
dataRow[j] = tempcell.NumericCellValue;
break;
default:
dataRow[j] = "";
break;
}
}
}
data.Rows.Add(dataRow);
}
} return data;
}
catch (Exception ex)
{
Console.WriteLine("Exception: " + ex.Message);
throw ex;
}
}
public DataTable ExcelToDataTable(int sheetIndex, int RowIndex, bool isFirstRowColumn)
{
ISheet sheet = null;
DataTable data = new DataTable();
int startRow = 0;
try
{
fs = new FileStream(fileName, FileMode.Open, FileAccess.Read);
if (fileName.IndexOf(".xlsx") > 0) // 2007版本
workbook = new XSSFWorkbook(fs);
else if (fileName.IndexOf(".xls") > 0) // 2003版本
workbook = new HSSFWorkbook(fs); sheet = workbook.GetSheetAt(sheetIndex);
if (sheet != null)
{
IRow firstRow = sheet.GetRow(RowIndex);
int cellCount = firstRow.LastCellNum; //一行最后一个cell的编号 即总的列数
if (isFirstRowColumn)
{
for (int i = firstRow.FirstCellNum; i < cellCount; ++i)
{
ICell cell = firstRow.GetCell(i);
if (cell != null)
{
string cellValue = cell.StringCellValue;
if (cellValue != null)
{
DataColumn column = new DataColumn(cellValue);
data.Columns.Add(column);
}
}
}
startRow = sheet.FirstRowNum + 1+ RowIndex;
}
else
{
startRow = sheet.FirstRowNum+ RowIndex;
} //最后一列的标号
int rowCount = sheet.LastRowNum;
ICell tempcell = null;
for (int i = startRow; i <= rowCount; ++i)
{
IRow row = sheet.GetRow(i);
if (row == null) continue; //没有数据的行默认是null DataRow dataRow = data.NewRow();
for (int j = row.FirstCellNum; j < cellCount; ++j)
{
tempcell = row.GetCell(j);
if (tempcell != null) //同理，没有数据的单元格都默认是null
{
switch (tempcell.CellType)
{
case CellType.Blank:
dataRow[j] = "";
break;
case CellType.String:
dataRow[j] = tempcell.StringCellValue;
break;
case CellType.Numeric:
dataRow[j] = tempcell.NumericCellValue;
break;
case CellType.Formula:
dataRow[j] = tempcell.NumericCellValue;
break;
default:
dataRow[j] = "";
break;
}
}
}
data.Rows.Add(dataRow);
}
} return data;
}
catch (Exception ex)
{
Console.WriteLine("Exception: " + ex.Message);
throw ex;
}
} public void Dispose()
{
Dispose(true);
GC.SuppressFinalize(this);
} protected virtual void Dispose(bool disposing)
{
if (!this.disposed)
{
if (disposing)
{
if (fs != null)
fs.Close();
} fs = null;
disposed = true;
}
}
}
}