.NET 通过 NPOI 操作 Excel
目录
.NET 通过 NPOI 操作 Excel
第一步：通过 NuGet 获取 NPOI 包并引入程序集
第二步：引入 NPOI 帮助类
using System;
using System.Collections.Generic;
using System.Data;
using System.IO;
using System.Text;
using System.Web;
using NPOI;
using NPOI.HPSF;
using NPOI.HSSF;
using NPOI.HSSF.UserModel;
using NPOI.HSSF.Util;
using NPOI.POIFS;
using NPOI.SS.Formula.Eval;
using NPOI.SS.UserModel;
using NPOI.Util;
using NPOI.SS;
using NPOI.DDF;
using NPOI.SS.Util;
using System.Collections;
using System.Text.RegularExpressions;
using NPOI.XSSF;
using NPOI.XSSF.UserModel;
using DreamClub.Web.Core;
public class NPOIHelper
{
private static WriteLog wl = new WriteLog();
#region 从datatable中将数据导出到excel
/// <summary>
/// DataTable导出到Excel的MemoryStream
/// </summary>
/// <param name="dtSource">源DataTable</param>
/// <param name="strHeaderText">表头文本</param>
static MemoryStream ExportDT(DataTable dtSource, string strHeaderText)
{
HSSFWorkbook workbook = new HSSFWorkbook();
HSSFSheet sheet = workbook.CreateSheet() as HSSFSheet;
#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
HSSFCellStyle dateStyle = workbook.CreateCellStyle() as HSSFCellStyle;
HSSFDataFormat format = workbook.CreateDataFormat() as HSSFDataFormat;
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() as HSSFSheet;
}
#region 表头及样式
{
HSSFRow headerRow = sheet.CreateRow(0) as HSSFRow;
headerRow.HeightInPoints = 25;
headerRow.CreateCell(0).SetCellValue(strHeaderText);
HSSFCellStyle headStyle = workbook.CreateCellStyle() as HSSFCellStyle;
headStyle.Alignment = NPOI.SS.UserModel.HorizontalAlignment.Center;
HSSFFont font = workbook.CreateFont() as HSSFFont;
font.FontHeightInPoints = 20;
font.Boldweight = 700;
headStyle.SetFont(font);
headerRow.GetCell(0).CellStyle = headStyle;
sheet.AddMergedRegion(new Region(0, 0, 0, dtSource.Columns.Count - 1));
//headerRow.Dispose();
}
#endregion
#region 列头及样式
{
HSSFRow headerRow = sheet.CreateRow(1) as HSSFRow;
HSSFCellStyle headStyle = workbook.CreateCellStyle() as HSSFCellStyle;
headStyle.Alignment = NPOI.SS.UserModel.HorizontalAlignment.Center;
HSSFFont font = workbook.CreateFont() as HSSFFont;
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);
}
//headerRow.Dispose();
}
#endregion
rowIndex = 2;
}
#endregion
#region 填充内容
HSSFRow dataRow = sheet.CreateRow(rowIndex) as HSSFRow;
foreach (DataColumn column in dtSource.Columns)
{
HSSFCell newCell = dataRow.CreateCell(column.Ordinal) as HSSFCell;
string drValue = row[column].ToString();
switch (column.DataType.ToString())
{
case "System.String": //字符串类型
double result;
if (isNumeric(drValue, out result))
{
double.TryParse(drValue, out result);
newCell.SetCellValue(result);
break;
}
else
{
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;
//sheet.Dispose();
//workbook.Dispose();
return ms;
}
}
/// <summary>
/// DataTable导出到Excel的MemoryStream
/// </summary>
/// <param name="dtSource">源DataTable</param>
/// <param name="strHeaderText">表头文本</param>
static void ExportDTI(DataTable dtSource, string strHeaderText, FileStream fs)
{
XSSFWorkbook workbook = new XSSFWorkbook();
XSSFSheet sheet = workbook.CreateSheet() as XSSFSheet;
#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
XSSFCellStyle dateStyle = workbook.CreateCellStyle() as XSSFCellStyle;
XSSFDataFormat format = workbook.CreateDataFormat() as XSSFDataFormat;
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 == 0)
{
#region 表头及样式
//{
// XSSFRow headerRow = sheet.CreateRow(0) as XSSFRow;
// headerRow.HeightInPoints = 25;
// headerRow.CreateCell(0).SetCellValue(strHeaderText);
// XSSFCellStyle headStyle = workbook.CreateCellStyle() as XSSFCellStyle;
// headStyle.Alignment = NPOI.SS.UserModel.HorizontalAlignment.CENTER;
// XSSFFont font = workbook.CreateFont() as XSSFFont;
// font.FontHeightInPoints = 20;
// font.Boldweight = 700;
// headStyle.SetFont(font);
// headerRow.GetCell(0).CellStyle = headStyle;
// //sheet.AddMergedRegion(new Region(0, 0, 0, dtSource.Columns.Count - 1));
// //headerRow.Dispose();
//}
#endregion
#region 列头及样式
{
XSSFRow headerRow = sheet.CreateRow(0) as XSSFRow;
XSSFCellStyle headStyle = workbook.CreateCellStyle() as XSSFCellStyle;
headStyle.Alignment = NPOI.SS.UserModel.HorizontalAlignment.Center;
XSSFFont font = workbook.CreateFont() as XSSFFont;
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);
}
//headerRow.Dispose();
}
#endregion
rowIndex = 1;
}
#endregion
#region 填充内容
XSSFRow dataRow = sheet.CreateRow(rowIndex) as XSSFRow;
foreach (DataColumn column in dtSource.Columns)
{
XSSFCell newCell = dataRow.CreateCell(column.Ordinal) as XSSFCell;
string drValue = row[column].ToString();
switch (column.DataType.ToString())
{
case "System.String": //字符串类型
double result;
if (isNumeric(drValue, out result))
{
double.TryParse(drValue, out result);
newCell.SetCellValue(result);
break;
}
else
{
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++;
}
workbook.Write(fs);
fs.Close();
}
/// <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>
public static void ExportDTtoExcel(DataTable dtSource, string strHeaderText, string strFileName)
{
string[] temp = strFileName.Split('.');
if (temp[temp.Length - 1] == "xls" && dtSource.Columns.Count < 256 && dtSource.Rows.Count < 65536)
{
using (MemoryStream ms = ExportDT(dtSource, strHeaderText))
{
using (FileStream fs = new FileStream(strFileName, FileMode.Create, FileAccess.Write))
{
byte[] data = ms.ToArray();
fs.Write(data, 0, data.Length);
fs.Flush();
}
}
}
else
{
if (temp[temp.Length - 1] == "xls")
strFileName = strFileName + "x";
using (FileStream fs = new FileStream(strFileName, FileMode.Create, FileAccess.Write))
{
ExportDTI(dtSource, strHeaderText, fs);
}
}
}
#endregion
#region 从excel中将数据导出到datatable
/// <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 ImportExceltoDt(string strFileName)
{
DataTable dt = new DataTable();
IWorkbook wb;
using (FileStream file = new FileStream(strFileName, FileMode.Open, FileAccess.Read))
{
wb = WorkbookFactory.Create(file);
}
ISheet sheet = wb.GetSheetAt(0);
dt = ImportDt(sheet, 0, true);
return dt;
}
/// <summary>
/// 读取Excel流到DataTable
/// </summary>
/// <param name="stream">Excel流</param>
/// <returns>第一个sheet中的数据</returns>
public static DataTable ImportExceltoDt(Stream stream)
{
try
{
DataTable dt = new DataTable();
IWorkbook wb;
using (stream)
{
wb = WorkbookFactory.Create(stream);
}
ISheet sheet = wb.GetSheetAt(0);
dt = ImportDt(sheet, 0, true);
return dt;
}
catch (Exception)
{
throw;
}
}
/// <summary>
/// 读取Excel流到DataTable
/// </summary>
/// <param name="stream">Excel流</param>
/// <param name="sheetName">表单名</param>
/// <param name="HeaderRowIndex">列头所在行号，-1表示没有列头</param>
/// <returns>指定sheet中的数据</returns>
public static DataTable ImportExceltoDt(Stream stream, string sheetName, int HeaderRowIndex)
{
try
{
DataTable dt = new DataTable();
IWorkbook wb;
using (stream)
{
wb = WorkbookFactory.Create(stream);
}
ISheet sheet = wb.GetSheet(sheetName);
dt = ImportDt(sheet, HeaderRowIndex, true);
return dt;
}
catch (Exception)
{
throw;
}
}
/// <summary>
/// 读取Excel流到DataSet
/// </summary>
/// <param name="stream">Excel流</param>
/// <returns>Excel中的数据</returns>
public static DataSet ImportExceltoDs(Stream stream)
{
try
{
DataSet ds = new DataSet();
IWorkbook wb;
using (stream)
{
wb = WorkbookFactory.Create(stream);
}
for (int i = 0; i < wb.NumberOfSheets; i++)
{
DataTable dt = new DataTable();
ISheet sheet = wb.GetSheetAt(i);
dt = ImportDt(sheet, 0, true);
ds.Tables.Add(dt);
}
return ds;
}
catch (Exception)
{
throw;
}
}
/// <summary>
/// 读取Excel流到DataSet
/// </summary>
/// <param name="stream">Excel流</param>
/// <param name="dict">字典参数，key：sheet名，value：列头所在行号，-1表示没有列头</param>
/// <returns>Excel中的数据</returns>
public static DataSet ImportExceltoDs(Stream stream, Dictionary<string, int> dict)
{
try
{
DataSet ds = new DataSet();
IWorkbook wb;
using (stream)
{
wb = WorkbookFactory.Create(stream);
}
foreach (string key in dict.Keys)
{
DataTable dt = new DataTable();
ISheet sheet = wb.GetSheet(key);
dt = ImportDt(sheet, dict[key], true);
ds.Tables.Add(dt);
}
return ds;
}
catch (Exception)
{
throw;
}
}
/// <summary>
/// 读取excel
/// </summary>
/// <param name="strFileName">excel文件路径</param>
/// <param name="sheet">需要导出的sheet</param>
/// <param name="HeaderRowIndex">列头所在行号，-1表示没有列头</param>
/// <returns></returns>
public static DataTable ImportExceltoDt(string strFileName, string SheetName, int HeaderRowIndex)
{
HSSFWorkbook workbook;
IWorkbook wb;
using (FileStream file = new FileStream(strFileName, FileMode.Open, FileAccess.Read))
{
wb = new HSSFWorkbook(file);
}
ISheet sheet = wb.GetSheet(SheetName);
DataTable table = new DataTable();
table = ImportDt(sheet, HeaderRowIndex, true);
//ExcelFileStream.Close();
workbook = null;
sheet = null;
return table;
}
/// <summary>
/// 读取excel
/// </summary>
/// <param name="strFileName">excel文件路径</param>
/// <param name="sheet">需要导出的sheet序号</param>
/// <param name="HeaderRowIndex">列头所在行号，-1表示没有列头</param>
/// <returns></returns>
public static DataTable ImportExceltoDt(string strFileName, int SheetIndex, int HeaderRowIndex)
{
HSSFWorkbook workbook;
IWorkbook wb;
using (FileStream file = new FileStream(strFileName, FileMode.Open, FileAccess.Read))
{
wb = WorkbookFactory.Create(file);
}
ISheet isheet = wb.GetSheetAt(SheetIndex);
DataTable table = new DataTable();
table = ImportDt(isheet, HeaderRowIndex, true);
//ExcelFileStream.Close();
workbook = null;
isheet = null;
return table;
}
/// <summary>
/// 读取excel
/// </summary>
/// <param name="strFileName">excel文件路径</param>
/// <param name="sheet">需要导出的sheet</param>
/// <param name="HeaderRowIndex">列头所在行号，-1表示没有列头</param>
/// <returns></returns>
public static DataTable ImportExceltoDt(string strFileName, string SheetName, int HeaderRowIndex, bool needHeader)
{
HSSFWorkbook workbook;
IWorkbook wb;
using (FileStream file = new FileStream(strFileName, FileMode.Open, FileAccess.Read))
{
wb = WorkbookFactory.Create(file);
}
ISheet sheet = wb.GetSheet(SheetName);
DataTable table = new DataTable();
table = ImportDt(sheet, HeaderRowIndex, needHeader);
//ExcelFileStream.Close();
workbook = null;
sheet = null;
return table;
}
/// <summary>
/// 读取excel
/// </summary>
/// <param name="strFileName">excel文件路径</param>
/// <param name="sheet">需要导出的sheet序号</param>
/// <param name="HeaderRowIndex">列头所在行号，-1表示没有列头</param>
/// <returns></returns>
public static DataTable ImportExceltoDt(string strFileName, int SheetIndex, int HeaderRowIndex, bool needHeader)
{
HSSFWorkbook workbook;
IWorkbook wb;
using (FileStream file = new FileStream(strFileName, FileMode.Open, FileAccess.Read))
{
wb = WorkbookFactory.Create(file);
}
ISheet sheet = wb.GetSheetAt(SheetIndex);
DataTable table = new DataTable();
table = ImportDt(sheet, HeaderRowIndex, needHeader);
//ExcelFileStream.Close();
workbook = null;
sheet = null;
return table;
}
/// <summary>
/// 将制定sheet中的数据导出到datatable中
/// </summary>
/// <param name="sheet">需要导出的sheet</param>
/// <param name="HeaderRowIndex">列头所在行号，-1表示没有列头</param>
/// <returns></returns>
static DataTable ImportDt(ISheet sheet, int HeaderRowIndex, bool needHeader)
{
DataTable table = new DataTable();
IRow headerRow;
int cellCount;
try
{
if (HeaderRowIndex < 0 || !needHeader)
{
headerRow = sheet.GetRow(0);
cellCount = headerRow.LastCellNum;
for (int i = headerRow.FirstCellNum; i <= cellCount; i++)
{
DataColumn column = new DataColumn(Convert.ToString(i));
table.Columns.Add(column);
}
}
else
{
headerRow = sheet.GetRow(HeaderRowIndex);
cellCount = headerRow.LastCellNum;
for (int i = headerRow.FirstCellNum; i <= cellCount; i++)
{
if (headerRow.GetCell(i) == null)
{
if (table.Columns.IndexOf(Convert.ToString(i)) > 0)
{
DataColumn column = new DataColumn(Convert.ToString("重复列名" + i));
table.Columns.Add(column);
}
else
{
DataColumn column = new DataColumn(Convert.ToString(i));
table.Columns.Add(column);
}
}
else if (table.Columns.IndexOf(headerRow.GetCell(i).ToString()) > 0)
{
DataColumn column = new DataColumn(Convert.ToString("重复列名" + i));
table.Columns.Add(column);
}
else
{
DataColumn column = new DataColumn(headerRow.GetCell(i).ToString());
table.Columns.Add(column);
}
}
}
int rowCount = sheet.LastRowNum;
for (int i = (HeaderRowIndex + 1); i <= sheet.LastRowNum; i++)
{
try
{
IRow row;
if (sheet.GetRow(i) == null)
{
row = sheet.CreateRow(i);
}
else
{
row = sheet.GetRow(i);
}
DataRow dataRow = table.NewRow();
for (int j = row.FirstCellNum; j <= cellCount; j++)
{
try
{
if (row.GetCell(j) != null)
{
switch (row.GetCell(j).CellType)
{
case CellType.String:
string str = row.GetCell(j).StringCellValue;
if (str != null && str.Length > 0)
{
dataRow[j] = str.ToString();
}
else
{
dataRow[j] = null;
}
break;
case CellType.Numeric:
if (DateUtil.IsCellDateFormatted(row.GetCell(j)))
{
dataRow[j] = DateTime.FromOADate(row.GetCell(j).NumericCellValue);
}
else
{
dataRow[j] = Convert.ToDouble(row.GetCell(j).NumericCellValue);
}
break;
case CellType.Boolean:
dataRow[j] = Convert.ToString(row.GetCell(j).BooleanCellValue);
break;
case CellType.Error:
dataRow[j] = ErrorEval.GetText(row.GetCell(j).ErrorCellValue);
break;
case CellType.Formula:
switch (row.GetCell(j).CachedFormulaResultType)
{
case CellType.String:
string strFORMULA = row.GetCell(j).StringCellValue;
if (strFORMULA != null && strFORMULA.Length > 0)
{
dataRow[j] = strFORMULA.ToString();
}
else
{
dataRow[j] = null;
}
break;
case CellType.Numeric:
dataRow[j] = Convert.ToString(row.GetCell(j).NumericCellValue);
break;
case CellType.Boolean:
dataRow[j] = Convert.ToString(row.GetCell(j).BooleanCellValue);
break;
case CellType.Error:
dataRow[j] = ErrorEval.GetText(row.GetCell(j).ErrorCellValue);
break;
default:
dataRow[j] = "";
break;
}
break;
default:
dataRow[j] = "";
break;
}
}
}
catch (Exception exception)
{
wl.WriteLogs(exception.ToString());
}
}
table.Rows.Add(dataRow);
}
catch (Exception exception)
{
wl.WriteLogs(exception.ToString());
}
}
}
catch (Exception exception)
{
wl.WriteLogs(exception.ToString());
}
return table;
}
#endregion
public static void InsertSheet(string outputFile, string sheetname, DataTable dt)
{
FileStream readfile = new FileStream(outputFile, FileMode.Open, FileAccess.Read);
IWorkbook hssfworkbook = WorkbookFactory.Create(readfile);
//HSSFWorkbook hssfworkbook = new HSSFWorkbook(readfile);
int num = hssfworkbook.GetSheetIndex(sheetname);
ISheet sheet1;
if (num >= 0)
sheet1 = hssfworkbook.GetSheet(sheetname);
else
{
sheet1 = hssfworkbook.CreateSheet(sheetname);
}
try
{
if (sheet1.GetRow(0) == null)
{
sheet1.CreateRow(0);
}
for (int coluid = 0; coluid < dt.Columns.Count; coluid++)
{
if (sheet1.GetRow(0).GetCell(coluid) == null)
{
sheet1.GetRow(0).CreateCell(coluid);
}
sheet1.GetRow(0).GetCell(coluid).SetCellValue(dt.Columns[coluid].ColumnName);
}
}
catch (Exception ex)
{
wl.WriteLogs(ex.ToString());
throw;
}
for (int i = 1; i <= dt.Rows.Count; i++)
{
try
{
if (sheet1.GetRow(i) == null)
{
sheet1.CreateRow(i);
}
for (int coluid = 0; coluid < dt.Columns.Count; coluid++)
{
if (sheet1.GetRow(i).GetCell(coluid) == null)
{
sheet1.GetRow(i).CreateCell(coluid);
}
sheet1.GetRow(i).GetCell(coluid).SetCellValue(dt.Rows[i - 1][coluid].ToString());
}
}
catch (Exception ex)
{
wl.WriteLogs(ex.ToString());
//throw;
}
}
try
{
readfile.Close();
FileStream writefile = new FileStream(outputFile, FileMode.OpenOrCreate, FileAccess.Write);
hssfworkbook.Write(writefile);
writefile.Close();
}
catch (Exception ex)
{
wl.WriteLogs(ex.ToString());
}
}
#region 更新excel中的数据
/// <summary>
/// 更新Excel表格
/// </summary>
/// <param name="outputFile">需更新的excel表格路径</param>
/// <param name="sheetname">sheet名</param>
/// <param name="updateData">需更新的数据</param>
/// <param name="coluid">需更新的列号</param>
/// <param name="rowid">需更新的开始行号</param>
public static void UpdateExcel(string outputFile, string sheetname, string[] updateData, int coluid, int rowid)
{
//FileStream readfile = new FileStream(outputFile, FileMode.Open, FileAccess.Read);
IWorkbook hssfworkbook = null;// WorkbookFactory.Create(outputFile);
//HSSFWorkbook hssfworkbook = new HSSFWorkbook(readfile);
ISheet sheet1 = hssfworkbook.GetSheet(sheetname);
for (int i = 0; i < updateData.Length; i++)
{
try
{
if (sheet1.GetRow(i + rowid) == null)
{
sheet1.CreateRow(i + rowid);
}
if (sheet1.GetRow(i + rowid).GetCell(coluid) == null)
{
sheet1.GetRow(i + rowid).CreateCell(coluid);
}
sheet1.GetRow(i + rowid).GetCell(coluid).SetCellValue(updateData[i]);
}
catch (Exception ex)
{
wl.WriteLogs(ex.ToString());
throw;
}
}
try
{
//readfile.Close();
FileStream writefile = new FileStream(outputFile, FileMode.OpenOrCreate, FileAccess.Write);
hssfworkbook.Write(writefile);
writefile.Close();
}
catch (Exception ex)
{
wl.WriteLogs(ex.ToString());
}
}
/// <summary>
/// 更新Excel表格
/// </summary>
/// <param name="outputFile">需更新的excel表格路径</param>
/// <param name="sheetname">sheet名</param>
/// <param name="updateData">需更新的数据</param>
/// <param name="coluids">需更新的列号</param>
/// <param name="rowid">需更新的开始行号</param>
public static void UpdateExcel(string outputFile, string sheetname, string[][] updateData, int[] coluids, int rowid)
{
FileStream readfile = new FileStream(outputFile, FileMode.Open, FileAccess.Read);
HSSFWorkbook hssfworkbook = new HSSFWorkbook(readfile);
readfile.Close();
ISheet sheet1 = hssfworkbook.GetSheet(sheetname);
for (int j = 0; j < coluids.Length; j++)
{
for (int i = 0; i < updateData[j].Length; i++)
{
try
{
if (sheet1.GetRow(i + rowid) == null)
{
sheet1.CreateRow(i + rowid);
}
if (sheet1.GetRow(i + rowid).GetCell(coluids[j]) == null)
{
sheet1.GetRow(i + rowid).CreateCell(coluids[j]);
}
sheet1.GetRow(i + rowid).GetCell(coluids[j]).SetCellValue(updateData[j][i]);
}
catch (Exception ex)
{
wl.WriteLogs(ex.ToString());
}
}
}
try
{
FileStream writefile = new FileStream(outputFile, FileMode.Create);
hssfworkbook.Write(writefile);
writefile.Close();
}
catch (Exception ex)
{
wl.WriteLogs(ex.ToString());
}
}
/// <summary>
/// 更新Excel表格
/// </summary>
/// <param name="outputFile">需更新的excel表格路径</param>
/// <param name="sheetname">sheet名</param>
/// <param name="updateData">需更新的数据</param>
/// <param name="coluid">需更新的列号</param>
/// <param name="rowid">需更新的开始行号</param>
public static void UpdateExcel(string outputFile, string sheetname, double[] updateData, int coluid, int rowid)
{
FileStream readfile = new FileStream(outputFile, FileMode.Open, FileAccess.Read);
HSSFWorkbook hssfworkbook = new HSSFWorkbook(readfile);
ISheet sheet1 = hssfworkbook.GetSheet(sheetname);
for (int i = 0; i < updateData.Length; i++)
{
try
{
if (sheet1.GetRow(i + rowid) == null)
{
sheet1.CreateRow(i + rowid);
}
if (sheet1.GetRow(i + rowid).GetCell(coluid) == null)
{
sheet1.GetRow(i + rowid).CreateCell(coluid);
}
sheet1.GetRow(i + rowid).GetCell(coluid).SetCellValue(updateData[i]);
}
catch (Exception ex)
{
wl.WriteLogs(ex.ToString());
throw;
}
}
try
{
readfile.Close();
FileStream writefile = new FileStream(outputFile, FileMode.Create, FileAccess.Write);
hssfworkbook.Write(writefile);
writefile.Close();
}
catch (Exception ex)
{
wl.WriteLogs(ex.ToString());
}
}
/// <summary>
/// 更新Excel表格
/// </summary>
/// <param name="outputFile">需更新的excel表格路径</param>
/// <param name="sheetname">sheet名</param>
/// <param name="updateData">需更新的数据</param>
/// <param name="coluids">需更新的列号</param>
/// <param name="rowid">需更新的开始行号</param>
public static void UpdateExcel(string outputFile, string sheetname, double[][] updateData, int[] coluids, int rowid)
{
FileStream readfile = new FileStream(outputFile, FileMode.Open, FileAccess.Read);
HSSFWorkbook hssfworkbook = new HSSFWorkbook(readfile);
readfile.Close();
ISheet sheet1 = hssfworkbook.GetSheet(sheetname);
for (int j = 0; j < coluids.Length; j++)
{
for (int i = 0; i < updateData[j].Length; i++)
{
try
{
if (sheet1.GetRow(i + rowid) == null)
{
sheet1.CreateRow(i + rowid);
}
if (sheet1.GetRow(i + rowid).GetCell(coluids[j]) == null)
{
sheet1.GetRow(i + rowid).CreateCell(coluids[j]);
}
sheet1.GetRow(i + rowid).GetCell(coluids[j]).SetCellValue(updateData[j][i]);
}
catch (Exception ex)
{
wl.WriteLogs(ex.ToString());
}
}
}
try
{
FileStream writefile = new FileStream(outputFile, FileMode.Create);
hssfworkbook.Write(writefile);
writefile.Close();
}
catch (Exception ex)
{
wl.WriteLogs(ex.ToString());
}
}
#endregion
public static int GetSheetNumber(string outputFile)
{
int number = 0;
try
{
FileStream readfile = new FileStream(outputFile, FileMode.Open, FileAccess.Read);
HSSFWorkbook hssfworkbook = new HSSFWorkbook(readfile);
number = hssfworkbook.NumberOfSheets;
}
catch (Exception exception)
{
wl.WriteLogs(exception.ToString());
}
return number;
}
public static ArrayList GetSheetName(string outputFile)
{
ArrayList arrayList = new ArrayList();
try
{
FileStream readfile = new FileStream(outputFile, FileMode.Open, FileAccess.Read);
HSSFWorkbook hssfworkbook = new HSSFWorkbook(readfile);
for (int i = 0; i < hssfworkbook.NumberOfSheets; i++)
{
arrayList.Add(hssfworkbook.GetSheetName(i));
}
}
catch (Exception exception)
{
wl.WriteLogs(exception.ToString());
}
return arrayList;
}
public static bool isNumeric(String message, out double result)
{
Regex rex = new Regex(@"^[-]?\d+[.]?\d*$");
result = -1;
if (rex.IsMatch(message))
{
result = double.Parse(message);
return true;
}
else
return false;
}
////////// 现用导出 \\\\\\\\\\
/// <summary>
/// 用于Web导出 第一步
/// </summary>
/// <param name="dtSource">源DataTable</param>
/// <param name="strHeaderText">表头文本</param>
/// <param name="strFileName">文件名</param>
public static void ExportByWeb(DataTable dtSource, string strHeaderText, string strFileName)
{
HttpContext curContext = HttpContext.Current;
// 设置编码和附件格式
curContext.Response.ContentType = "application/vnd.ms-excel";
curContext.Response.ContentEncoding = Encoding.UTF8;
curContext.Response.Charset = "";
curContext.Response.AppendHeader("Content-Disposition",
"attachment;filename=" + HttpUtility.UrlEncode(strFileName, Encoding.UTF8));
curContext.Response.BinaryWrite(Export(dtSource, strHeaderText).GetBuffer());
curContext.Response.End();
}
/// <summary>
/// DataTable导出到Excel的MemoryStream 第二步
/// </summary>
/// <param name="dtSource">源DataTable</param>
/// <param name="strHeaderText">表头文本</param>
public static MemoryStream Export(DataTable dtSource, string strHeaderText)
{
HSSFWorkbook workbook = new HSSFWorkbook();
HSSFSheet sheet = workbook.CreateSheet() as HSSFSheet;
#region 右击文件 属性信息
{
DocumentSummaryInformation dsi = PropertySetFactory.CreateDocumentSummaryInformation();
dsi.Company = "NPOI";
workbook.DocumentSummaryInformation = dsi;
SummaryInformation si = PropertySetFactory.CreateSummaryInformation();
si.Author = "文件作者信息"; //填加xls文件作者信息
si.ApplicationName = "创建程序信息"; //填加xls文件创建程序信息
si.LastAuthor = "最后保存者信息"; //填加xls文件最后保存者信息
si.Comments = "作者信息"; //填加xls文件作者信息
si.Title = "标题信息"; //填加xls文件标题信息
si.Subject = "主题信息";//填加文件主题信息
si.CreateDateTime = DateTime.Now;
workbook.SummaryInformation = si;
}
#endregion
HSSFCellStyle dateStyle = workbook.CreateCellStyle() as HSSFCellStyle;
HSSFDataFormat format = workbook.CreateDataFormat() as HSSFDataFormat;
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() as HSSFSheet;
}
#region 表头及样式
{
if (string.IsNullOrEmpty(strHeaderText))
{
HSSFRow headerRow = sheet.CreateRow(0) as HSSFRow;
headerRow.HeightInPoints = 25;
headerRow.CreateCell(0).SetCellValue(strHeaderText);
HSSFCellStyle headStyle = workbook.CreateCellStyle() as HSSFCellStyle;
//headStyle.Alignment = CellHorizontalAlignment.CENTER;
HSSFFont font = workbook.CreateFont() as HSSFFont;
font.FontHeightInPoints = 20;
font.Boldweight = 700;
headStyle.SetFont(font);
headerRow.GetCell(0).CellStyle = headStyle;
sheet.AddMergedRegion(new Region(0, 0, 0, dtSource.Columns.Count - 1));
//headerRow.Dispose();
}
}
#endregion
#region 列头及样式
{
HSSFRow headerRow = sheet.CreateRow(0) as HSSFRow;
HSSFCellStyle headStyle = workbook.CreateCellStyle() as HSSFCellStyle;
//headStyle.Alignment = CellHorizontalAlignment.CENTER;
HSSFFont font = workbook.CreateFont() as HSSFFont;
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);
}
//headerRow.Dispose();
}
#endregion
rowIndex = 1;
}
#endregion
#region 填充内容
HSSFRow dataRow = sheet.CreateRow(rowIndex) as HSSFRow;
foreach (DataColumn column in dtSource.Columns)
{
HSSFCell newCell = dataRow.CreateCell(column.Ordinal) as HSSFCell;
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;
//sheet.Dispose();
//workbook.Dispose();//一般只用写这一个就OK了，他会遍历并释放所有资源，但当前版本有问题所以只释放sheet
return ms;
}
}
/// <summary>
/// /注：分浏览器进行编码（IE必须编码，FireFox不能编码，Chrome可编码也可不编码）
/// </summary>
/// <param name="ds"></param>
/// <param name="strHeaderText"></param>
/// <param name="strFileName"></param>
public static void ExportByWeb(DataSet ds, string strHeaderText, string strFileName)
{
HttpContext curContext = HttpContext.Current;
curContext.Response.ContentType = "application/vnd.ms-excel";
curContext.Response.Charset = "";
if (curContext.Request.UserAgent.ToLower().IndexOf("firefox", System.StringComparison.Ordinal) > 0)
{
curContext.Response.AppendHeader("Content-Disposition", "attachment;filename=" + strFileName);
}
else
{
curContext.Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(strFileName, System.Text.Encoding.UTF8));
}
// curContext.Response.AppendHeader("Content-Disposition", "attachment;filename=" +strFileName);
curContext.Response.ContentEncoding = System.Text.Encoding.GetEncoding("utf-8");
curContext.Response.BinaryWrite(ExportDataSetToExcel(ds, strHeaderText).GetBuffer());
curContext.Response.End();
}
/// <summary>
/// 由DataSet导出Excel
/// </summary>
/// <param name="sourceTable">要导出数据的DataTable</param>
/// <param name="sheetName">工作表名称</param>
/// <returns>Excel工作表</returns>
private static MemoryStream ExportDataSetToExcel(DataSet sourceDs, string sheetName)
{
HSSFWorkbook workbook = new HSSFWorkbook();
MemoryStream ms = new MemoryStream();
string[] sheetNames = sheetName.Split(',');
for (int i = 0; i < sheetNames.Length; i++)
{
ISheet sheet = workbook.CreateSheet(sheetNames[i]);
#region 列头
IRow headerRow = sheet.CreateRow(0);
HSSFCellStyle headStyle = workbook.CreateCellStyle() as HSSFCellStyle;
HSSFFont font = workbook.CreateFont() as HSSFFont;
font.FontHeightInPoints = 10;
font.Boldweight = 700;
headStyle.SetFont(font);
//取得列宽
int[] arrColWidth = new int[sourceDs.Tables[i].Columns.Count];
foreach (DataColumn item in sourceDs.Tables[i].Columns)
{
arrColWidth[item.Ordinal] = Encoding.GetEncoding(936).GetBytes(item.ColumnName.ToString()).Length;
}
// 处理列头
foreach (DataColumn column in sourceDs.Tables[i].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
#region 填充值
int rowIndex = 1;
foreach (DataRow row in sourceDs.Tables[i].Rows)
{
IRow dataRow = sheet.CreateRow(rowIndex);
foreach (DataColumn column in sourceDs.Tables[i].Columns)
{
dataRow.CreateCell(column.Ordinal).SetCellValue(row[column].ToString());
}
rowIndex++;
}
#endregion
}
workbook.Write(ms);
ms.Flush();
ms.Position = 0;
workbook = null;
return ms;
}
/// <summary>
/// 验证导入的Excel是否有数据
/// </summary>
/// <param name="excelFileStream"></param>
/// <returns></returns>
public static bool HasData(Stream excelFileStream)
{
using (excelFileStream)
{
IWorkbook workBook = new HSSFWorkbook(excelFileStream);
if (workBook.NumberOfSheets > 0)
{
ISheet sheet = workBook.GetSheetAt(0);
return sheet.PhysicalNumberOfRows > 0;
}
}
return false;
}
}
第三步：在程序中调用相应的方法对数据进行导出导入操作
将 DataTable 导出为 Excel
string fileName = Server.MapPath("~/Content/temp/" + "课程数据.xls");
var dt = bll.GetDataTable();
NPOIHelper.ExportDTtoExcel(dt, "课程数据", fileName);//参数说明 dt：数据源，"课程数据"：导出的Excel表头，fileName：导出的文件名（全路径）
将 Excel 导入为 DataTable
string fileName = Server.MapPath("~/Content/temp/" + "课程数据.xls");
DataTable dt = NPOIHelper.ImportExceltoDt(fileName);//参数说明 fileName：导入的文件名（全路径）
在 Web 端将 DataTable 导出为 Excel 并输出到浏览器下载
public FileResult ExportSelClassDataExcel(string id)
{
//获取要导出的数据
var dt = bll.GetDataTable();
string filename = DateTime.Now.ToString("yyyy-MM-dd")+".xls";
NPOIHelper.ExportByWeb(dt , "这是表头文本啊", filename);
return null;
}
其它方法
帮助类中提供的方法还很多，不在一一赘述
