diff --git a/Elight.Utility/Extensions/ExcelReader.cs b/Elight.Utility/Extensions/ExcelReader.cs
new file mode 100644
index 0000000..388fd26
--- /dev/null
+++ b/Elight.Utility/Extensions/ExcelReader.cs
@@ -0,0 +1,305 @@
+using System;
+using System.Collections.Generic;
+using System.Data;
+using System.Diagnostics;
+using NPOI.HSSF.UserModel;
+using NPOI.SS.UserModel;
+using NPOI.XSSF.UserModel;
+
+namespace Elight.Utility.Extensions
+{
+ public class ExcelReader
+ {
+ private string fileName = null; //文件名
+ private IWorkbook workbook = null;
+ private FileStream fs = null;
+ private bool disposed;
+ public ExcelReader(string fileName)
+ {
+ this.fileName = fileName;
+ disposed = false;
+ }
+ ///
+ /// 将DataTable数据导入到excel中
+ ///
+ /// 要导入的数据
+ /// DataTable的列名是否要导入
+ /// 要导入的excel的sheet的名称
+ /// 导入数据行数(包含列名那一行)
+ public int DataTableToExcel(DataTable data, string sheetName, bool isColumnWritten)
+ {
+ 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());
+ }
+ ++count;
+ }
+ workbook.Write(fs); //写入到excel
+ return count;
+ }
+ catch (Exception ex)
+ {
+ Console.WriteLine("Exception: " + ex.Message);
+ return -1;
+ }
+ }
+ ///
+ /// 将excel中的数据导入到DataTable中
+ ///
+ /// excel工作薄sheet的名称
+ /// 第一行是否是DataTable的列名
+ /// 返回的DataTable
+ public DataTable ExcelToDataTable(string sheetName = default, bool isFirstRowColumn = true)
+ {
+ 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);
+ //sheet = workbook.CreateSheet(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);
+ if (firstRow == null)
+ {
+ return null;
+ }
+ 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 (!string.IsNullOrEmpty(cellValue))
+ {
+ Trace.WriteLine(cellValue);
+ 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;
+ 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)
+ {
+ if (row.GetCell(j) != null) //同理,没有数据的单元格都默认是null
+ dataRow[j] = row.GetCell(j).ToString();
+ }
+ data.Rows.Add(dataRow);
+ }
+ }
+
+ return data;
+ }
+ catch (Exception ex)
+ {
+ Console.WriteLine("Exception: " + ex.Message);
+ return null;
+ }
+ }
+
+ public void ExportToExcel(DataTable dt, string fileName)
+ {
+ IWorkbook workbook;
+ string fileExt = Path.GetExtension(fileName).ToLower();
+ //XSSFWorkbook 适用XLSX格式,HSSFWorkbook 适用XLS格式
+ if (fileExt == ".xlsx")
+ {
+ workbook = new XSSFWorkbook();
+ }
+ else if (fileExt == ".xls")
+ {
+ workbook = new HSSFWorkbook();
+ }
+ else
+ {
+ workbook = null;
+ return;
+ }
+
+ ISheet sheet = string.IsNullOrEmpty(dt.TableName) ? workbook.CreateSheet("Sheet1") : workbook.CreateSheet(dt.TableName);
+
+ //表头
+ IRow row = sheet.CreateRow(0);
+ for (int i = 0; i < dt.Columns.Count; i++)
+ {
+ ICell cell = row.CreateCell(i);
+ cell.SetCellValue(dt.Columns[i].ColumnName);
+ }
+
+ //数据
+ for (int i = 0; i < dt.Rows.Count; i++)
+ {
+ IRow row1 = sheet.CreateRow(i + 1);
+ for (int j = 0; j < dt.Columns.Count; j++)
+ {
+ ICell cell = row1.CreateCell(j);
+ cell.SetCellValue(dt.Rows[i][j].ToString());
+ }
+ }
+
+ //保存为Excel文件
+ using (FileStream fs = new FileStream(fileName, FileMode.Create, FileAccess.Write))
+ {
+ workbook.Write(fs);
+ }
+ }
+
+
+
+ ///
+ /// EXCEL第一列读取到list
+ ///
+ ///
+ public List ExcelToList()
+ {
+ List list = new List();
+ DataTable dt = ExcelToDataTable("Sheet1", true);
+ foreach (DataRow item in dt.Rows)
+ {
+ list.Add(item[0].ToString());
+ }
+ return list;
+ }
+ ///
+ /// 读取指定EXCEL列
+ ///
+ ///
+ ///
+ public List ExcelToList(int columnIndex)
+ {
+ List list = new List();
+ DataTable dt = ExcelToDataTable("Sheet1", true);
+ foreach (DataRow item in dt.Rows)
+ {
+ list.Add(item[columnIndex].ToString());
+ }
+ return list;
+ }
+ public List ExcelToList(string columnName)
+ {
+ List list = new List();
+ DataTable dt = ExcelToDataTable("Sheet1", true);
+ foreach (DataRow item in dt.Rows)
+ {
+ list.Add(item[columnName].ToString());
+ }
+ return list;
+ }
+ ///
+ /// list转datatable
+ ///
+ ///
+ ///
+ public DataTable ToDataTable(List collection)
+ {
+ DataTable dt = new DataTable();
+ dt.Columns.Add("ID");
+ foreach (var item in collection)
+ {
+ DataRow dr = dt.NewRow();
+ dr[0] = item.ToString();
+ dt.Rows.Add(dr);
+ }
+ return dt;
+ }
+
+ public int ListToExcel(List collection)
+ {
+ DataTable dt = ToDataTable(collection);
+ return DataTableToExcel(dt, "Sheet1", true);
+ }
+ 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;
+ }
+ }
+ }
+}