then break //每条记录的单元格数量不能大于表格栏位数量 20140213{break;}ICell cell

1.通过NUGET打点器下载nopi，在引入命令空间

1 using System; 2 using System.Collections.Generic; 3 using System.Text; 4 using System.IO; 5 using NPOI.SS.UserModel; //NPOI 6 using NPOI.HSSF.Util; //NPOI 7 using NPOI.HSSF.UserModel; //NPOI 8 using NPOI.XSSF.UserModel; //NPOI 9 using System.Data.SqlClient; 10 using System.Data;

View Code

2.导入成果

// <summary> /// Excel某sheet中内容导入到DataTable中 /// 区分xsl和xslx分袂措置惩罚惩罚 /// </summary> /// <param>Excel文件路径,含文件全名</param> /// <param>此Excel中sheet名</param> /// <returns></returns> public DataTable ExcelSheetImportToDataTable(string filePath, string sheetName) { DataTable dt = new DataTable(); if (Path.GetExtension(filePath).ToLower() == ".xls".ToLower()) {//.xls #region .xls文件措置惩罚惩罚:HSSFWorkbook try { using (FileStream file = new FileStream(filePath, FileMode.Open, FileAccess.Read)) { hssfworkbook = new HSSFWorkbook(file); } } catch (Exception e) { throw e; } ISheet sheet = hssfworkbook.GetSheet(sheetName); System.Collections.IEnumerator rows = sheet.GetRowEnumerator(); HSSFRow headerRow = (HSSFRow)sheet.GetRow(0); //一行最后一个方格的编号 即总的列数 for (int j = 0; j < (sheet.GetRow(0).LastCellNum); j++) { //SET EVERY COLUMN NAME HSSFCell cell = (HSSFCell)headerRow.GetCell(j); dt.Columns.Add(cell.ToString()); } while (rows.MoveNext()) { IRow row = (HSSFRow)rows.Current; DataRow dr = dt.NewRow(); if (row.RowNum == 0) continue;//The firt row is title,no need import for (int i = 0; i < row.LastCellNum; i++) { if (i>=dt.Columns.Count)//cell count>column count,then break //每笔记录的单元格数量不能大于表格栏位数量 20140213 { break; } ICell cell = row.GetCell(i); if ((i==0)&&(string.IsNullOrEmpty(cell.ToString())==true))//每行第一个cell为空,break { break; } if (cell == null) { dr[i] = null; } else { dr[i] = cell.ToString(); } } dt.Rows.Add(dr); } #endregion } else {//.xlsx #region .xlsx文件措置惩罚惩罚:XSSFWorkbook try { using (FileStream file = new FileStream(filePath, FileMode.Open, FileAccess.Read)) { hssfworkbook = new XSSFWorkbook(file); } } catch (Exception e) { throw e; } ISheet sheet = hssfworkbook.GetSheet(sheetName); System.Collections.IEnumerator rows = sheet.GetRowEnumerator(); XSSFRow headerRow = (XSSFRow)sheet.GetRow(0); //一行最后一个方格的编号 即总的列数 for (int j = 0; j < (sheet.GetRow(0).LastCellNum); j++) { //SET EVERY COLUMN NAME XSSFCell cell = (XSSFCell)headerRow.GetCell(j); dt.Columns.Add(cell.ToString()); } while (rows.MoveNext()) { IRow row = (XSSFRow)rows.Current; DataRow dr = dt.NewRow(); if (row.RowNum == 0) continue;//The firt row is title,no need import for (int i = 0; i < row.LastCellNum; i++) { if (i >= dt.Columns.Count)//cell count>column count,then break //每笔记录的单元格数量不能大于表格栏位数量 20140213 { break; } ICell cell = row.GetCell(i); if ((i == 0) && (string.IsNullOrEmpty(cell.ToString()) == true))//每行第一个cell为空,break { break; } if (cell == null) { dr[i] = null; } else { dr[i] = cell.ToString(); } } dt.Rows.Add(dr); } #endregion } return dt; }

　3.导出成果

/// <summary> /// NPOI导出Excel，，不依赖本地是否装有Excel，导出速度快 /// </summary> /// <param>要导出的dataGridView控件</param> /// <param>sheet表名</param> /// public static void ExportToExcel(DataGridView dataGridView1, string sheetName) { SaveFileDialog fileDialog = new SaveFileDialog(); fileDialog.Filter = "Excel(97-2003)|*.xls"; if (fileDialog.ShowDialog() == System.Windows.Forms.DialogResult.Cancel) { return; } //不允许dataGridView显示添加行，卖力导出时会报最后一行未实例化错误 dataGridView1.AllowUserToAddRows = false; HSSFWorkbook workbook = new HSSFWorkbook(); ISheet sheet = workbook.CreateSheet(sheetName); IRow rowHead = sheet.CreateRow(0); //填写表头 for (int i = 0; i < dataGridView1.Columns.Count; i++) { rowHead.CreateCell(i, CellType.String).SetCellValue(dataGridView1.Columns[i].HeaderText.ToString()); } //填写内容 for (int i = 0; i < dataGridView1.Rows.Count; i++) { IRow row = sheet.CreateRow(i + 1); for (int j = 0; j < dataGridView1.Columns.Count; j++) { row.CreateCell(j, CellType.String).SetCellValue(dataGridView1.Rows[i].Cells[j].Value.ToString()); } } using (FileStream stream = File.OpenWrite(fileDialog.FileName)) { workbook.Write(stream); stream.Close(); } MessageBox.Show("导出数据告成!", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information); GC.Collect(); }

　　

在winform中使用很方面的，出格是些处事措施的

using System;

using System.Collections.Generic;

using System.Text;

using System.IO;

using NPOI.SS.UserModel;        //NPOI

using NPOI.HSSF.Util;           //NPOI

using NPOI.HSSF.UserModel;      //NPOI

using NPOI.XSSF.UserModel;      //NPOI

using System.Data.SqlClient;

using System.Data;