627 lines
30 KiB
C#
627 lines
30 KiB
C#
using NPOI.HPSF;
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using NPOI.HSSF.UserModel;
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using NPOI.SS.UserModel;
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using NPOI.XSSF.UserModel;
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using System;
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using System.Collections.Generic;
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using System.Data;
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using System.IO;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace NPOITest
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{
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/// <summary>
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/// Execl工具辅助类
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/// </summary>
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public class ExeclHelper
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{
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/// <summary>
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/// 读取Execl数据到DataTable中
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/// </summary>
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/// <param name="filePath">指定Execl文件路径</param>
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/// <param name="isColumnName">设置第一行是否是列名</param>
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/// <returns>返回一个DataTable数据集</returns>
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public static DataTable ExcelToDataTable(string filePath, string sheetName, bool isColumnName)
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{
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DataTable dataTable = null;
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FileStream fs = null;
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DataColumn column = null;
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DataRow dataRow = null;
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IWorkbook workbook = null;
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ISheet sheet = null;
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IRow row = null;
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ICell cell = null;
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int startRow = 0;
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try
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{
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using (fs = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
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{
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// 2007版本
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if (filePath.IndexOf(".xlsx") > 0)
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workbook = new XSSFWorkbook(fs);
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// 2003版本
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else if (filePath.IndexOf(".xls") > 0)
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workbook = new HSSFWorkbook(fs);
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if (workbook != null)
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{
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sheet = workbook.GetSheet(sheetName);//读取第一个sheet，当然也可以循环读取每个sheet
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dataTable = new DataTable();
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if (sheet != null)
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{
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int rowCount = sheet.LastRowNum;//总行数
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if (rowCount > 0)
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{
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IRow firstRow = sheet.GetRow(0);//第一行
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int cellCount = firstRow.LastCellNum;//列数
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//构建datatable的列
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if (isColumnName)
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{
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startRow = 1;//如果第一行是列名，则从第二行开始读取
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for (int i = firstRow.FirstCellNum; i < cellCount; ++i)
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{
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cell = firstRow.GetCell(i);
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if (cell != null)
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{
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if (cell.StringCellValue != null)
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{
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column = new DataColumn(cell.StringCellValue);
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dataTable.Columns.Add(column);
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}
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}
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}
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}
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else
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{
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for (int i = firstRow.FirstCellNum; i < cellCount; ++i)
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{
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column = new DataColumn("column" + (i + 1));
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dataTable.Columns.Add(column);
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}
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}
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//填充行
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for (int i = startRow; i <= rowCount; ++i)
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{
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row = sheet.GetRow(i);
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if (row == null) continue;
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dataRow = dataTable.NewRow();
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for (int j = row.FirstCellNum; j < cellCount; ++j)
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{
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cell = row.GetCell(j);
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if (cell == null)
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{
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dataRow[j] = "";
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}
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else
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{
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//CellType(Unknown = -1,Numeric = 0,String = 1,Formula = 2,Blank = 3,Boolean = 4,Error = 5,)
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switch (cell.CellType)
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{
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case CellType.Blank:
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dataRow[j] = "";
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break;
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case CellType.Numeric:
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short format = cell.CellStyle.DataFormat;
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//对时间格式（2015.12.5、2015/12/5、2015-12-5等）的处理
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if (format == 14 || format == 31 || format == 57 || format == 58)
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dataRow[j] = cell.DateCellValue;
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else
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dataRow[j] = cell.NumericCellValue;
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break;
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case CellType.String:
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dataRow[j] = cell.StringCellValue;
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break;
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}
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}
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}
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dataTable.Rows.Add(dataRow);
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}
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}
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}
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}
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}
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return dataTable;
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}
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catch (Exception err)
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{
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if (fs != null)
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{
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fs.Close();
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}
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return null;
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}
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}
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public static DataTable ExcelToDataTable(string filePath,int sheetIndex, bool isColumnName)
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{
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DataTable dataTable = null;
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FileStream fs = null;
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DataColumn column = null;
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DataRow dataRow = null;
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IWorkbook workbook = null;
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ISheet sheet = null;
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IRow row = null;
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ICell cell = null;
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int startRow = 0;
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try
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{
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using (fs = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
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{
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// 2007版本
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if (filePath.IndexOf(".xlsx") > 0)
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workbook = new XSSFWorkbook(fs);
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// 2003版本
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else if (filePath.IndexOf(".xls") > 0)
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workbook = new HSSFWorkbook(fs);
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if (workbook != null)
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{
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sheet = workbook.GetSheetAt(sheetIndex);//读取第一个sheet，当然也可以循环读取每个sheet
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dataTable = new DataTable();
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if (sheet != null)
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{
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int rowCount = sheet.LastRowNum;//总行数
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if (rowCount > 0)
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{
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IRow firstRow = sheet.GetRow(0);//第一行
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int cellCount = firstRow.LastCellNum;//列数
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//构建datatable的列
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if (isColumnName)
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{
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startRow = 1;//如果第一行是列名，则从第二行开始读取
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for (int i = firstRow.FirstCellNum; i < cellCount; ++i)
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{
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cell = firstRow.GetCell(i);
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if (cell != null)
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{
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if (cell.StringCellValue != null)
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{
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column = new DataColumn(cell.StringCellValue);
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dataTable.Columns.Add(column);
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}
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}
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}
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}
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else
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{
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for (int i = firstRow.FirstCellNum; i < cellCount; ++i)
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{
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column = new DataColumn("column" + (i + 1));
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dataTable.Columns.Add(column);
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}
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}
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//填充行
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for (int i = startRow; i <= rowCount; ++i)
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{
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row = sheet.GetRow(i);
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if (row == null) continue;
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dataRow = dataTable.NewRow();
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for (int j = row.FirstCellNum; j < cellCount; ++j)
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{
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cell = row.GetCell(j);
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if (cell == null)
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{
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dataRow[j] = "";
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}
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else
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{
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//CellType(Unknown = -1,Numeric = 0,String = 1,Formula = 2,Blank = 3,Boolean = 4,Error = 5,)
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switch (cell.CellType)
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{
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case CellType.Blank:
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dataRow[j] = "";
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break;
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case CellType.Numeric:
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short format = cell.CellStyle.DataFormat;
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//对时间格式（2015.12.5、2015/12/5、2015-12-5等）的处理
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if (format == 14 || format == 31 || format == 57 || format == 58 || format == 22)
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dataRow[j] = cell.DateCellValue;
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else
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dataRow[j] = cell.NumericCellValue;
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break;
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case CellType.String:
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dataRow[j] = cell.StringCellValue;
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break;
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}
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}
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}
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dataTable.Rows.Add(dataRow);
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}
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}
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}
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}
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}
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return dataTable;
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}
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catch (Exception)
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{
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if (fs != null)
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{
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fs.Close();
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}
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return null;
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}
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}
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public static void DataTableToExcel(DataTable dataTable, string templatePath, string outputPath, int startRow, int startCol)
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{
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// 加载模板文件
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using (FileStream fs = new FileStream(templatePath, FileMode.Open, FileAccess.Read))
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{
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IWorkbook workbook = new XSSFWorkbook(fs);
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ISheet sheet = workbook.GetSheetAt(0); // 获取第一个工作表
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// 创建单元格样式
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ICellStyle cellStyle = workbook.CreateCellStyle();
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IFont font = workbook.CreateFont();
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font.FontHeightInPoints = 12;
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cellStyle.SetFont(font);
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cellStyle.BorderTop = BorderStyle.Thin;
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cellStyle.BorderBottom = BorderStyle.Thin;
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cellStyle.BorderLeft = BorderStyle.Thin;
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cellStyle.BorderRight = BorderStyle.Thin;
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cellStyle.Alignment = HorizontalAlignment.Center;
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// 遍历DataTable的每一行
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for (int i = 0; i < dataTable.Rows.Count; i++)
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{
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IRow row = sheet.CreateRow(startRow + i); // 创建新行
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// 遍历DataTable的每一列
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for (int j = 0; j < dataTable.Columns.Count; j++)
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{
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ICell cell = row.CreateCell(startCol + j); // 创建新单元格
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cell.SetCellValue(dataTable.Rows[i][j].ToString());
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cell.CellStyle = cellStyle; // 应用单元格样式
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}
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}
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// 保存输出文件
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using (FileStream outputStream = new FileStream(outputPath, FileMode.Create, FileAccess.Write))
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{
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workbook.Write(outputStream);
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}
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}
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}
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/// <summary>
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/// 将DataTable导出到Excel文档（自动根据扩展名选择 .xlsx / .xls 格式）
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/// </summary>
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/// <param name="dt">传入一个DataTable数据集</param>
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/// <param name="sheetName">工作表名称</param>
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/// <param name="Outpath">导出文件完整路径（支持 .xlsx 和 .xls）</param>
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/// <returns>True表示导出成功，False表示导出失败</returns>
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public static bool DataTableToExcel(DataTable dt, string sheetName, string Outpath)
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{
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if (dt == null || dt.Rows.Count == 0 || string.IsNullOrWhiteSpace(Outpath))
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return false;
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IWorkbook workbook = null;
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try
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{
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// ── 1. 根据文件扩展名选择正确的 Workbook 类型 ──
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string ext = Path.GetExtension(Outpath).ToLowerInvariant();
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if (ext == ".xlsx")
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workbook = new XSSFWorkbook(); // OOXML 格式
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else
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workbook = new HSSFWorkbook(); // BIFF8 格式
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ISheet sheet = workbook.CreateSheet(sheetName);
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int rowCount = dt.Rows.Count;
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int columnCount = dt.Columns.Count;
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// ── 2. 创建表头样式（加粗 + 背景色 + 边框） ──
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ICellStyle headerStyle = workbook.CreateCellStyle();
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IFont headerFont = workbook.CreateFont();
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headerFont.IsBold = true;
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headerFont.FontHeightInPoints = 11;
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headerFont.FontName = "微软雅黑";
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headerStyle.SetFont(headerFont);
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headerStyle.FillForegroundColor = NPOI.HSSF.Util.HSSFColor.Grey25Percent.Index;
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headerStyle.FillPattern = FillPattern.SolidForeground;
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headerStyle.Alignment = HorizontalAlignment.Center;
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headerStyle.VerticalAlignment = VerticalAlignment.Center;
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headerStyle.BorderTop = BorderStyle.Thin;
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headerStyle.BorderBottom = BorderStyle.Thin;
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headerStyle.BorderLeft = BorderStyle.Thin;
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headerStyle.BorderRight = BorderStyle.Thin;
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// ── 3. 创建数据行样式（边框） ──
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ICellStyle dataStyle = workbook.CreateCellStyle();
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IFont dataFont = workbook.CreateFont();
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dataFont.FontHeightInPoints = 10;
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dataFont.FontName = "微软雅黑";
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dataStyle.SetFont(dataFont);
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dataStyle.VerticalAlignment = VerticalAlignment.Center;
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dataStyle.BorderTop = BorderStyle.Thin;
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dataStyle.BorderBottom = BorderStyle.Thin;
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dataStyle.BorderLeft = BorderStyle.Thin;
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dataStyle.BorderRight = BorderStyle.Thin;
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// ── 4. 写入列头 ──
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IRow headerRow = sheet.CreateRow(0);
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headerRow.HeightInPoints = 22;
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for (int c = 0; c < columnCount; c++)
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{
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ICell cell = headerRow.CreateCell(c);
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cell.SetCellValue(dt.Columns[c].ColumnName);
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cell.CellStyle = headerStyle;
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}
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// ── 5. 写入数据行 ──
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for (int i = 0; i < rowCount; i++)
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{
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IRow row = sheet.CreateRow(i + 1);
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for (int j = 0; j < columnCount; j++)
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{
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ICell cell = row.CreateCell(j);
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object val = dt.Rows[i][j];
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// 根据数据类型设置单元格值，保留数值精度
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if (val == null || val == DBNull.Value)
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{
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cell.SetCellValue("");
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}
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else if (val is DateTime dtVal)
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{
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cell.SetCellValue(dtVal.ToString("yyyy-MM-dd HH:mm:ss"));
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}
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else if (val is double || val is float || val is decimal)
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{
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cell.SetCellValue(Convert.ToDouble(val));
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}
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else if (val is int || val is long || val is short)
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{
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cell.SetCellValue(Convert.ToDouble(val));
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}
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else
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{
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cell.SetCellValue(val.ToString());
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}
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cell.CellStyle = dataStyle;
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}
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}
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// ── 6. 自动调整列宽（限制最大宽度避免过宽） ──
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for (int c = 0; c < columnCount; c++)
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{
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sheet.AutoSizeColumn(c);
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int colWidth = sheet.GetColumnWidth(c);
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// 最大列宽限制为 50 个字符宽度 (50 * 256)
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if (colWidth > 50 * 256)
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sheet.SetColumnWidth(c, 50 * 256);
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// 最小列宽
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else if (colWidth < 10 * 256)
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sheet.SetColumnWidth(c, 10 * 256);
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}
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// ── 7. 写入文件（使用 FileMode.Create 确保覆盖写入） ──
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using (FileStream fs = new FileStream(Outpath, FileMode.Create, FileAccess.Write))
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{
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workbook.Write(fs);
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}
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return true;
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}
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catch (Exception ex)
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{
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System.Diagnostics.Debug.WriteLine($"[ExeclHelper] 导出Excel失败: {ex.Message}");
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return false;
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}
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finally
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{
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if (workbook != null)
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{
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workbook.Close();
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workbook = null;
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}
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}
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}
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/// <summary>
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/// 读取Execl数据到DataTable(DataSet)中
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/// </summary>
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/// <param name="filePath">指定Execl文件路径</param>
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/// <param name="isFirstLineColumnName">设置第一行是否是列名</param>
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/// <returns>返回一个DataTable数据集</returns>
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public static DataSet ExcelToDataSet(string filePath, bool isFirstLineColumnName)
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{
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DataSet dataSet = new DataSet();
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int startRow = 0;
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try
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{
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using (FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
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{
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IWorkbook workbook = null;
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// 如果是2007+的Excel版本
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if (filePath.IndexOf(".xlsx") > 0)
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{
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workbook = new XSSFWorkbook(fs);
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}
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// 如果是2003-的Excel版本
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else if (filePath.IndexOf(".xls") > 0)
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{
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workbook = new HSSFWorkbook(fs);
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}
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if (workbook != null)
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{
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//循环读取Excel的每个sheet，每个sheet页都转换为一个DataTable，并放在DataSet中
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for (int p = 0; p < workbook.NumberOfSheets; p++)
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{
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ISheet sheet = workbook.GetSheetAt(p);
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DataTable dataTable = new DataTable();
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dataTable.TableName = sheet.SheetName;
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if (sheet != null)
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{
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int rowCount = sheet.LastRowNum;//获取总行数
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if (rowCount > 0)
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{
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IRow firstRow = sheet.GetRow(0);//获取第一行
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int cellCount = firstRow.LastCellNum;//获取总列数
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//构建datatable的列
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if (isFirstLineColumnName)
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{
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startRow = 1;//如果第一行是列名，则从第二行开始读取
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for (int i = firstRow.FirstCellNum; i < cellCount; ++i)
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{
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ICell cell = firstRow.GetCell(i);
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if (cell != null)
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{
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if (cell.StringCellValue != null)
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{
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DataColumn column = new DataColumn(cell.StringCellValue);
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dataTable.Columns.Add(column);
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}
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}
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}
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}
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else
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{
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for (int i = firstRow.FirstCellNum; i < cellCount; ++i)
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{
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DataColumn column = new DataColumn("column" + (i + 1));
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dataTable.Columns.Add(column);
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}
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}
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//填充行
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for (int i = startRow; i <= rowCount; ++i)
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{
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IRow row = sheet.GetRow(i);
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if (row == null) continue;
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DataRow dataRow = dataTable.NewRow();
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for (int j = row.FirstCellNum; j < cellCount; ++j)
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{
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ICell cell = row.GetCell(j);
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if (cell == null)
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{
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dataRow[j] = "";
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}
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else
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{
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//CellType(Unknown = -1,Numeric = 0,String = 1,Formula = 2,Blank = 3,Boolean = 4,Error = 5,)
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switch (cell.CellType)
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{
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case CellType.Blank:
|
||
dataRow[j] = "";
|
||
break;
|
||
case CellType.Numeric:
|
||
short format = cell.CellStyle.DataFormat;
|
||
//对时间格式（2015.12.5、2015/12/5、2015-12-5等）的处理
|
||
if (format == 14 || format == 31 || format == 57 || format == 58)
|
||
dataRow[j] = cell.DateCellValue;
|
||
else
|
||
dataRow[j] = cell.NumericCellValue;
|
||
break;
|
||
case CellType.String:
|
||
dataRow[j] = cell.StringCellValue;
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
dataTable.Rows.Add(dataRow);
|
||
}
|
||
}
|
||
}
|
||
dataSet.Tables.Add(dataTable);
|
||
}
|
||
|
||
}
|
||
}
|
||
return dataSet;
|
||
}
|
||
catch (Exception err)
|
||
{
|
||
return null;
|
||
}
|
||
}
|
||
|
||
|
||
/// <summary>
|
||
/// 将DataTable(DataSet)导出到Execl文档
|
||
/// </summary>
|
||
/// <param name="dataSet">传入一个DataSet</param>
|
||
/// <param name="Outpath">导出路径（可以不加扩展名，不加默认为.xls）</param>
|
||
/// <returns>返回一个Bool类型的值，表示是否导出成功</returns>
|
||
/// True表示导出成功，Flase表示导出失败
|
||
public static bool DataSetToExcel(DataSet dataSet, string Outpath)
|
||
{
|
||
bool result = false;
|
||
try
|
||
{
|
||
if (dataSet == null || dataSet.Tables == null || dataSet.Tables.Count == 0 || string.IsNullOrEmpty(Outpath))
|
||
throw new Exception("输入的DataSet或路径异常");
|
||
int sheetIndex = 0;
|
||
//根据输出路径的扩展名判断workbook的实例类型
|
||
IWorkbook workbook = null;
|
||
string pathExtensionName = Outpath.Trim().Substring(Outpath.Length - 5);
|
||
if (pathExtensionName.Contains(".xlsx"))
|
||
{
|
||
workbook = new XSSFWorkbook();
|
||
}
|
||
else if (pathExtensionName.Contains(".xls"))
|
||
{
|
||
workbook = new HSSFWorkbook();
|
||
}
|
||
else
|
||
{
|
||
Outpath = Outpath.Trim() + ".xls";
|
||
workbook = new HSSFWorkbook();
|
||
}
|
||
//将DataSet导出为Excel
|
||
foreach (DataTable dt in dataSet.Tables)
|
||
{
|
||
sheetIndex++;
|
||
if (dt != null && dt.Rows.Count > 0)
|
||
{
|
||
ISheet sheet = workbook.CreateSheet(string.IsNullOrEmpty(dt.TableName) ? ("sheet" + sheetIndex) : dt.TableName);//创建一个名称为Sheet0的表
|
||
int rowCount = dt.Rows.Count;//行数
|
||
int columnCount = dt.Columns.Count;//列数
|
||
|
||
//设置列头
|
||
IRow row = sheet.CreateRow(0);//excel第一行设为列头
|
||
for (int c = 0; c < columnCount; c++)
|
||
{
|
||
ICell cell = row.CreateCell(c);
|
||
cell.SetCellValue(dt.Columns[c].ColumnName);
|
||
}
|
||
|
||
//设置每行每列的单元格,
|
||
for (int i = 0; i < rowCount; i++)
|
||
{
|
||
row = sheet.CreateRow(i + 1);
|
||
for (int j = 0; j < columnCount; j++)
|
||
{
|
||
ICell cell = row.CreateCell(j);//excel第二行开始写入数据
|
||
cell.SetCellValue(dt.Rows[i][j].ToString());
|
||
}
|
||
}
|
||
}
|
||
}
|
||
//向outPath输出数据
|
||
using (FileStream fs = File.OpenWrite(Outpath))
|
||
{
|
||
workbook.Write(fs);//向打开的这个xls文件中写入数据
|
||
result = true;
|
||
}
|
||
return result;
|
||
}
|
||
catch (Exception ex)
|
||
{
|
||
return false;
|
||
}
|
||
}
|
||
|
||
|
||
}
|
||
|
||
|
||
}
|
||
|
||
|