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   源码介绍

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  导出Excel

using System;
using System.Collections.Generic;
using System.Text;
using System.Data;

using System.IO;
using NPOI.XSSF.UserModel;
using NPOI.HSSF.UserModel;
using NPOI.SS.UserModel;
using NPOI.SS.Util;
using NPOI.HPSF;

namespace 倾斜仪测试工具
{
public class ExcelNPOIHelper
{
#region ==========导出===========
/// <summary>
/// NPOI简单Demo，快速入门代码
/// </summary>
/// <param name="dtSource"></param>
/// <param name="strFileName"></param>
/// <remarks>NPOI认为Excel的第一个单元格是：(0，0)</remarks>
/// <Author>柳永法 http://www.yongfa365.com/ 2010-5-8 22:21:41</Author>
public static void Export(DataTable dtSource, string strFileName)
{
HSSFWorkbook workbook = new HSSFWorkbook();
ISheet sheet = workbook.CreateSheet();

//填充表头
IRow dataRow = sheet.CreateRow(0);
foreach (DataColumn column in dtSource.Columns)
{
dataRow.CreateCell(column.Ordinal).SetCellValue(column.ColumnName);
}


//填充内容
for (int i = 0; i < dtSource.Rows.Count; i )
{
dataRow = sheet.CreateRow(i 1);
for (int j = 0; j < dtSource.Columns.Count; j )
{
dataRow.CreateCell(j).SetCellValue(dtSource.Rows[i][j].ToString());
}
}


//保存
using (MemoryStream ms = new MemoryStream())
{
using (FileStream fs = new FileStream(strFileName, FileMode.Create, FileAccess.Write))
{
workbook.Write(ms);
ms.Flush();
ms.Position = 0;
byte[] data = ms.ToArray();
fs.Write(data, 0, data.Length);
fs.Flush();
}
}
}
/// <summary>
/// NPOI简单Demo，快速入门代码
/// </summary>
/// <param name="dtSource"></param>
/// <param name="strFileName"></param>
/// <remarks>NPOI认为Excel的第一个单元格是：(0，0)</remarks>
/// <Author>柳永法 http://www.yongfa365.com/ 2010-5-8 22:21:41</Author>
public static void Export(System.Windows.Forms.ListView dtSource, string strFileName)
{
HSSFWorkbook workbook = new HSSFWorkbook();
ISheet sheet = workbook.CreateSheet();

//填充表头
IRow dataRow = sheet.CreateRow(0);
for (int i = 0; i < dtSource.Columns.Count; i )
{
dataRow.CreateCell(dtSource.Columns[i].Index).SetCellValue(dtSource.Columns[i].Text);
}



//填充内容
for (int i = 0; i < dtSource.Items.Count; i )
{
dataRow = sheet.CreateRow(i 1);
for (int j = 0; j < dtSource.Columns.Count; j )
{
dataRow.CreateCell(j).SetCellValue(dtSource.Items[i].SubItems[j].Text.ToString());
}
}


//保存
using (MemoryStream ms = new MemoryStream())
{
using (FileStream fs = new FileStream(strFileName, FileMode.Create, FileAccess.Write))
{
workbook.Write(ms);
ms.Flush();
ms.Position = 0;
byte[] data = ms.ToArray();
fs.Write(data, 0, data.Length);
fs.Flush();
}
}
}
/// <summary>
/// DataTable导出到Excel文件
/// </summary>
/// <param name="dtSource">源DataTable</param>
/// <param name="strHeaderText">表头文本</param>
/// <param name="strFileName">保存位置</param>
/// <Author>柳永法 http://www.yongfa365.com/ 2010-5-8 22:21:41</Author>
public static void Export(DataTable dtSource, string strHeaderText, string strFileName)
{
using (MemoryStream ms = ExportMemoryStream(dtSource, strHeaderText))
{
using (FileStream fs = new FileStream(strFileName, FileMode.Create, FileAccess.Write))
{
byte[] data = ms.ToArray();
fs.Write(data, 0, data.Length);
fs.Flush();
}
}
}
/// <summary>
/// DataTable导出到Excel的MemoryStream
/// </summary>
/// <param name="dtSource">源DataTable</param>
/// <param name="strHeaderText">表头文本</param>
/// <Author>柳永法 http://www.yongfa365.com/ 2010-5-8 22:21:41</Author>
private static MemoryStream ExportMemoryStream(DataTable dtSource, string strHeaderText)
{
HSSFWorkbook workbook = new HSSFWorkbook();
ISheet sheet = workbook.CreateSheet();

#region 右击文件 属性信息
{
DocumentSummaryInformation dsi = PropertySetFactory.CreateDocumentSummaryInformation();
dsi.Company = "http://www.yongfa365.com/";
workbook.DocumentSummaryInformation = dsi;

SummaryInformation si = PropertySetFactory.CreateSummaryInformation();
si.Author = "柳永法"; //填加xls文件作者信息
si.ApplicationName = "NPOI测试程序"; //填加xls文件创建程序信息
si.LastAuthor = "柳永法2"; //填加xls文件最后保存者信息
si.Comments = "说明信息"; //填加xls文件作者信息
si.Title = "NPOI测试"; //填加xls文件标题信息
si.Subject = "NPOI测试Demo";//填加文件主题信息
si.CreateDateTime = DateTime.Now;
workbook.SummaryInformation = si;
}
#endregion

ICellStyle dateStyle = workbook.CreateCellStyle();
IDataFormat format = workbook.CreateDataFormat();
dateStyle.DataFormat = format.GetFormat("yyyy-mm-dd");

//取得列宽
int[] arrColWidth = new int[dtSource.Columns.Count];
foreach (DataColumn item in dtSource.Columns)
{
arrColWidth[item.Ordinal] = Encoding.GetEncoding(936).GetBytes(item.ColumnName.ToString()).Length;
}
for (int i = 0; i < dtSource.Rows.Count; i )
{
for (int j = 0; j < dtSource.Columns.Count; j )
{
int intTemp = Encoding.GetEncoding(936).GetBytes(dtSource.Rows[i][j].ToString()).Length;
if (intTemp > arrColWidth[j])
{
arrColWidth[j] = intTemp;
}
}
}



int rowIndex = 0;

foreach (DataRow row in dtSource.Rows)
{
#region 新建表，填充表头，填充列头，样式
if (rowIndex == 65535 || rowIndex == 0)
{
if (rowIndex != 0)
{
sheet = workbook.CreateSheet();
}

#region 表头及样式
{
IRow headerRow = sheet.CreateRow(0);
headerRow.HeightInPoints = 25;
headerRow.CreateCell(0).SetCellValue(strHeaderText);

ICellStyle headStyle = workbook.CreateCellStyle();
headStyle.Alignment = HorizontalAlignment.Center;
IFont font = workbook.CreateFont();
font.FontHeightInPoints = 20;
font.Boldweight = 700;
headStyle.SetFont(font);

headerRow.GetCell(0).CellStyle = headStyle;
CellRangeAddress cellRange = new CellRangeAddress(0, 0, 0, dtSource.Columns.Count - 1);
sheet.AddMergedRegion(cellRange);

}
#endregion


#region 列头及样式
{
IRow headerRow = sheet.CreateRow(1);


ICellStyle headStyle = workbook.CreateCellStyle();
headStyle.Alignment = HorizontalAlignment.Center;
IFont font = workbook.CreateFont();
font.FontHeightInPoints = 10;
font.Boldweight = 700;
headStyle.SetFont(font);


foreach (DataColumn column in dtSource.Columns)
{
headerRow.CreateCell(column.Ordinal).SetCellValue(column.ColumnName);
headerRow.GetCell(column.Ordinal).CellStyle = headStyle;

//设置列宽
sheet.SetColumnWidth(column.Ordinal, (arrColWidth[column.Ordinal] 1) * 256);

}
}
#endregion

rowIndex = 2;
}
#endregion


#region 填充内容
IRow dataRow = sheet.CreateRow(rowIndex);
foreach (DataColumn column in dtSource.Columns)
{
ICell newCell = dataRow.CreateCell(column.Ordinal);

string drValue = row[column].ToString();

switch (column.DataType.ToString())
{
case "System.String"://字符串类型
newCell.SetCellValue(drValue);
break;
case "System.DateTime"://日期类型
DateTime dateV;
DateTime.TryParse(drValue, out dateV);
newCell.SetCellValue(dateV);

newCell.CellStyle = dateStyle;//格式化显示
break;
case "System.Boolean"://布尔型
bool boolV = false;
bool.TryParse(drValue, out boolV);
newCell.SetCellValue(boolV);
break;
case "System.Int16"://整型
case "System.Int32":
case "System.Int64":
case "System.Byte":
int intV = 0;
int.TryParse(drValue, out intV);
newCell.SetCellValue(intV);
break;
case "System.Decimal"://浮点型
case "System.Double":
double doubV = 0;
double.TryParse(drValue, out doubV);
newCell.SetCellValue(doubV);
break;
case "System.DBNull"://空值处理
newCell.SetCellValue("");
break;
default:
newCell.SetCellValue("");
break;
}

}
#endregion

rowIndex ;
}


using (MemoryStream ms = new MemoryStream())
{
workbook.Write(ms);
ms.Flush();
ms.Position = 0;


return ms;
}



}
#endregion

#region  ========读取excel=======
/// <summary>读取excel
/// 默认第一行为标头
/// </summary>
/// <param name="strFileName">excel文档路径</param>
/// <returns></returns>
public static DataTable Import(string strFileName)
{
DataTable dt = new DataTable();

HSSFWorkbook hssfworkbook;
using (FileStream file = new FileStream(strFileName, FileMode.Open, FileAccess.Read))
{
hssfworkbook = new HSSFWorkbook(file);
}
ISheet sheet = hssfworkbook.GetSheetAt(0);
System.Collections.IEnumerator rows = sheet.GetRowEnumerator();

IRow headerRow = sheet.GetRow(0);
int cellCount = headerRow.LastCellNum;

for (int j = 0; j < cellCount; j )
{
ICell cell = headerRow.GetCell(j);
//出错
if (dt.Columns.Contains(cell.ToString()))
{
dt.Columns.Add(cell.ToString() "1");
}
else
{
dt.Columns.Add(cell.ToString());
}
}
//不去掉第一行
for (int i = (sheet.FirstRowNum 1); i <= sheet.LastRowNum; i )//(sheet.FirstRowNum 1)
{
IRow row = sheet.GetRow(i);
DataRow dataRow = dt.NewRow();

try
{
for (int j = row.FirstCellNum; j < cellCount; j )
{
if (row.GetCell(j) != null)
dataRow[j] = row.GetCell(j).ToString();
}
}
catch
{


}

dt.Rows.Add(dataRow);
}

return dt;
}
public static DataTable Import(Stream ExcelFileStream, string SheetName, int HeaderRowIndex)
{
HSSFWorkbook workbook = new HSSFWorkbook(ExcelFileStream);
ISheet sheet = workbook.GetSheet(SheetName);

DataTable table = new DataTable();

IRow headerRow = sheet.GetRow(HeaderRowIndex);
int cellCount = headerRow.LastCellNum;

for (int i = headerRow.FirstCellNum; i < cellCount; i )
{
DataColumn column = new DataColumn(headerRow.GetCell(i).StringCellValue);
table.Columns.Add(column);
}

int rowCount = sheet.LastRowNum;

for (int i = (sheet.FirstRowNum 1); i < sheet.LastRowNum; i )
{
IRow row = sheet.GetRow(i);
DataRow dataRow = table.NewRow();

for (int j = row.FirstCellNum; j < cellCount; j )
dataRow[j] = row.GetCell(j).ToString();
}

ExcelFileStream.Close();
workbook = null;
sheet = null;
return table;
}
public static DataTable Import(Stream ExcelFileStream, int SheetIndex, int HeaderRowIndex)
{
HSSFWorkbook workbook = new HSSFWorkbook(ExcelFileStream);
ISheet sheet = workbook.GetSheetAt(SheetIndex);

DataTable table = new DataTable();

IRow headerRow = sheet.GetRow(HeaderRowIndex);
int cellCount = headerRow.LastCellNum;

for (int i = headerRow.FirstCellNum; i < cellCount; i )
{
DataColumn column = new DataColumn(headerRow.GetCell(i).StringCellValue);
table.Columns.Add(column);
}

int rowCount = sheet.LastRowNum;

for (int i = (sheet.FirstRowNum 1); i < sheet.LastRowNum; i )
{
IRow row = sheet.GetRow(i);
DataRow dataRow = table.NewRow();

for (int j = row.FirstCellNum; j < cellCount; j )
{
if (row.GetCell(j) != null)
dataRow[j] = row.GetCell(j).ToString();
}

table.Rows.Add(dataRow);
}

ExcelFileStream.Close();
workbook = null;
sheet = null;
return table;
}
/// <summary>
/// 由Excel 2003 导入DataSet，如果有多个工作表，则导入多个DataTable
/// </summary>
/// <param name="excelFileStream">Excel文件流</param>
/// <param name="headerRowIndex">Excel表头行索引</param>
/// <returns>DataSet</returns>
public static DataSet ImportDataSetFromExcel2003(string excelFilePath, int headerRowIndex)
{
DataSet ds = new DataSet();
using (FileStream stream = System.IO.File.OpenRead(excelFilePath))
{
HSSFWorkbook workbook = new HSSFWorkbook(stream);
try
{
for (int a = 0, b = workbook.NumberOfSheets; a < b; a )
{
DataTable table = new DataTable();
try
{
#region 标题
string sheetName = string.Empty;
ISheet sheet = workbook.GetSheetAt(a);

table.TableName = workbook.GetSheetName(a);
IRow headerRow = sheet.GetRow(headerRowIndex);
int cellCount = headerRow.LastCellNum;


for (int i = headerRow.FirstCellNum; i < cellCount; i )
{
string strCellValue = string.Empty;
if (headerRow.GetCell(i) == null)
{
// 如果遇到第一个空列，则不再继续向后读取
cellCount = i 1;
break;
}
if (headerRow.GetCell(i).CellType == CellType.String)
{
strCellValue = headerRow.GetCell(i).StringCellValue;

}
else if (headerRow.GetCell(i).CellType == CellType.Boolean)
{
strCellValue = headerRow.GetCell(i).BooleanCellValue.ToString();
}
else if (headerRow.GetCell(i).CellType == CellType.Error)
{
strCellValue = headerRow.GetCell(i).ErrorCellValue.ToString();
}
else if (headerRow.GetCell(i).CellType == CellType.Numeric)
{
strCellValue = headerRow.GetCell(i).NumericCellValue.ToString();
}
else
{
// 如果遇到第一个空列，则不再继续向后读取
cellCount = i 1;
break;
}
if (strCellValue.Trim().Length < 1)
{
// 如果遇到第一个空列，则不再继续向后读取
cellCount = i 1;
break;
}
DataColumn column = null;
//string columnName = headerRow.GetCell(i).StringCellValue;
if (table.Columns.Contains(strCellValue))
{
column = new DataColumn(strCellValue i.ToString());
}
else
{
column = new DataColumn(strCellValue);
}
// DataColumn column = new DataColumn(headerRow.GetCell(i).StringCellValue);
table.Columns.Add(column);
}
#endregion
#region 内容
for (int i = (sheet.FirstRowNum 1); i <= sheet.LastRowNum; i )
{
IRow row = sheet.GetRow(i);
if (row == null || row.GetCell(0) == null || row.GetCell(0).ToString().Trim() == "")
{
// 如果遇到第一个空行，则不再继续向后读取
break;
}
DataRow dataRow = table.NewRow();
for (int j = row.FirstCellNum; j < cellCount; j )
{
if (row.GetCell(j) != null)
{
dataRow[j] = row.GetCell(j).ToString();
}
}
table.Rows.Add(dataRow);
}
#endregion
}
catch
{

}
ds.Tables.Add(table);
}
}
catch
{

}
workbook = null;
stream.Close();
}
return ds;

}
/// <summary>
/// 由Excel导入DataSet，如果有多个工作表，则导入多个DataTable
/// </summary>
/// <param name="excelFileStream">Excel文件流</param>
/// <param name="headerRowIndex">Excel表头行索引</param>
/// <returns>DataSet</returns>
public static DataSet ImportDataSetFromExcel2007(string excelFilePath, int headerRowIndex)
{
DataSet ds = new DataSet();
using (FileStream stream = System.IO.File.OpenRead(excelFilePath))
{
XSSFWorkbook workbook = new XSSFWorkbook(stream);
try
{
for (int a = 0, b = workbook.NumberOfSheets; a < b; a )
{
DataTable table = new DataTable();
try
{
#region 标题
string sheetName = string.Empty;
ISheet sheet = workbook.GetSheetAt(a);

table.TableName = workbook.GetSheetName(a);
IRow headerRow = sheet.GetRow(headerRowIndex);
if (headerRow == null)
{
break;
}
int cellCount = headerRow.LastCellNum;


for (int i = headerRow.FirstCellNum; i < cellCount; i )
{
string strCellValue = string.Empty;
if (headerRow.GetCell(i) == null)
{
// 如果遇到第一个空列，则不再继续向后读取
cellCount = i 1;
break;
}
if (headerRow.GetCell(i).CellType == CellType.String)
{
strCellValue = headerRow.GetCell(i).StringCellValue;

}
else if (headerRow.GetCell(i).CellType == CellType.Boolean)
{
strCellValue = headerRow.GetCell(i).BooleanCellValue.ToString();
}
else if (headerRow.GetCell(i).CellType == CellType.Error)
{
strCellValue = headerRow.GetCell(i).ErrorCellValue.ToString();
}
else if (headerRow.GetCell(i).CellType == CellType.Numeric)
{
strCellValue = headerRow.GetCell(i).NumericCellValue.ToString();
}
else
{
// 如果遇到第一个空列，则不再继续向后读取
cellCount = i 1;
break;
}
if (strCellValue.Trim().Length < 1)
{
// 如果遇到第一个空列，则不再继续向后读取
cellCount = i 1;
break;
}
DataColumn column = null;
//string columnName = headerRow.GetCell(i).StringCellValue;
if (table.Columns.Contains(strCellValue))
{
column = new DataColumn(strCellValue i.ToString());
}
else
{
column = new DataColumn(strCellValue);
}
// DataColumn column = new DataColumn(headerRow.GetCell(i).StringCellValue);
table.Columns.Add(column);
}
#endregion
#region 内容
for (int i = (sheet.FirstRowNum 1); i <= sheet.LastRowNum; i )
{
IRow row = sheet.GetRow(i);
if (row == null || row.GetCell(0) == null || row.GetCell(0).ToString().Trim() == "")
{
// 如果遇到第一个空行，则不再继续向后读取
break;
}
DataRow dataRow = table.NewRow();
for (int j = row.FirstCellNum; j < cellCount; j )
{
if (row.GetCell(j) != null)
{
dataRow[j] = row.GetCell(j).ToString();
}
}
table.Rows.Add(dataRow);
}
#endregion
}
catch
{

}
ds.Tables.Add(table);
}
}
catch
{
}
workbook = null;
stream.Close();
}
return ds;

}
#endregion


}
}