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.Net中对Execl实际操作中，如果如果直接调用微软的Office组件，会碰到各种问题，为了避免这些问题发生，使用NPOI控件。这是款非常不错的第三方插件。
在项目中需要引用NPOI.dll文件，这个文件在网上下载一个就可以了。
NPOI教程链接：http://www.npoi.info/tutorial
下面是对DataGridView的导入和导出
导出
/// <summary> /// 订单导出 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void exportBtn_Click(object sender, EventArgs e) { //打开一个对话框，选择或输入保存excel文件的地址 SaveFileDialog sdfExport = new SaveFileDialog(); sdfExport.Filter = "Excel文件|*.xls"; if (sdfExport.ShowDialog() != DialogResult.OK) { return; } //获取excel文件名 string fileName = sdfExport.FileName; //创建一个workbook HSSFWorkbook workbook = new HSSFWorkbook(); //设置工作表名 ISheet sheet = workbook.CreateSheet("采购订单"); //创建表头行 IRow rowHeader = sheet.CreateRow(0); //给每个单元格设值 rowHeader.CreateCell(0, CellType.STRING).SetCellValue("规格型号"); rowHeader.CreateCell(1, CellType.STRING).SetCellValue("光度"); rowHeader.CreateCell(2, CellType.STRING).SetCellValue("散光度"); rowHeader.CreateCell(3, CellType.STRING).SetCellValue("轴度"); rowHeader.CreateCell(4, CellType.STRING).SetCellValue("物料英文名"); rowHeader.CreateCell(5, CellType.STRING).SetCellValue("物料中文名"); rowHeader.CreateCell(6, CellType.STRING).SetCellValue("在库数量"); rowHeader.CreateCell(7, CellType.STRING).SetCellValue("在途数量"); rowHeader.CreateCell(8, CellType.STRING).SetCellValue("理论库存"); rowHeader.CreateCell(9, CellType.STRING).SetCellValue("月出货数量"); rowHeader.CreateCell(10, CellType.STRING).SetCellValue("理论周转"); rowHeader.CreateCell(11, CellType.STRING).SetCellValue("标准周转"); rowHeader.CreateCell(12, CellType.STRING).SetCellValue("订单数量"); rowHeader.CreateCell(13, CellType.STRING).SetCellValue("赠品数量"); rowHeader.CreateCell(14, CellType.STRING).SetCellValue("订单金额"); //循环dataGridView取出每一条数据（如果是集合或数组，操作一样） for (int i = 0; i < this.gvShow.Rows.Count; i++) { //循环列 for (int j = 0; j < this.gvShow.ColumnCount; j++) { //开始创建内容行并放入数据 IRow row = sheet.CreateRow(i + 1); row.CreateCell(0, CellType.STRING).SetCellValue(this.gvShow.Rows[i].Cells[0].Value.ToString()); row.CreateCell(1, CellType.STRING).SetCellValue(this.gvShow.Rows[i].Cells[1].Value.ToString()); if (this.gvShow.Rows[i].Cells[2].Value != null) { row.CreateCell(2, CellType.STRING).SetCellValue(this.gvShow.Rows[i].Cells[2].Value.ToString()); } if (this.gvShow.Rows[i].Cells[3].Value != null) { row.CreateCell(3, CellType.STRING).SetCellValue(this.gvShow.Rows[i].Cells[3].Value.ToString()); } row.CreateCell(4, CellType.STRING).SetCellValue(this.gvShow.Rows[i].Cells[4].Value.ToString()); row.CreateCell(5, CellType.STRING).SetCellValue(this.gvShow.Rows[i].Cells[5].Value.ToString()); row.CreateCell(6, CellType.STRING).SetCellValue(this.gvShow.Rows[i].Cells[6].Value.ToString()); row.CreateCell(7, CellType.STRING).SetCellValue(this.gvShow.Rows[i].Cells[7].Value.ToString()); row.CreateCell(8, CellType.STRING).SetCellValue(this.gvShow.Rows[i].Cells[8].Value.ToString()); row.CreateCell(9, CellType.STRING).SetCellValue(this.gvShow.Rows[i].Cells[9].Value.ToString()); row.CreateCell(10, CellType.STRING).SetCellValue(this.gvShow.Rows[i].Cells[10].Value.ToString()); row.CreateCell(11, CellType.STRING).SetCellValue(this.gvShow.Rows[i].Cells[11].Value.ToString()); row.CreateCell(12, CellType.STRING).SetCellValue(this.gvShow.Rows[i].Cells[12].Value.ToString()); row.CreateCell(13, CellType.STRING).SetCellValue(this.gvShow.Rows[i].Cells[13].Value.ToString()); row.CreateCell(14, CellType.STRING).SetCellValue(this.gvShow.Rows[i].Cells[14].Value.ToString()); } } //保存数据 using (Stream stream = File.OpenWrite(fileName)) { workbook.Write(stream); MessageBox.Show("导出成功", "提示", MessageBoxButtons.OK, MessageBoxIcon.Asterisk); } }
导入
/// <summary> /// 订单导入 /// </summary> /// <param name="strFileName">Excel文件全路径(服务器路径)</param> /// <param name="SheetIndex">要获取数据的工作表序号(从0开始)</param> /// <param name="HeaderRowIndex">工作表标题行所在行号(从0开始)</param> /// <returns></returns> private void btnImport_Click(object sender, EventArgs e) { //条件重置 this.gvShow.Rows.Clear(); OpenFileDialog importDialog = new OpenFileDialog(); if (importDialog.ShowDialog() == DialogResult.OK) { string strFileName = importDialog.FileName.ToString(); //获得文件路径 using (FileStream file = new FileStream(strFileName, FileMode.Open, FileAccess.Read)) { IWorkbook workbook = new HSSFWorkbook(file); string SheetName = workbook.GetSheetName(0); DataTable dt = RenderDataTableFromExcel(workbook, SheetName, 0); foreach (DataRow item in dt.Rows) { DataGridViewRow Row = new DataGridViewRow(); int index = gvShow.Rows.Add(Row); gvShow.Rows[index].Cells[0].Value = item["规格型号"].ToString(); gvShow.Rows[index].Cells[1].Value = item["光度"].ToString(); gvShow.Rows[index].Cells[2].Value = item["散光度"].ToString(); gvShow.Rows[index].Cells[3].Value = item["轴度"].ToString(); gvShow.Rows[index].Cells[4].Value = item["物料英文名"].ToString(); gvShow.Rows[index].Cells[5].Value = item["物料中文名"].ToString(); gvShow.Rows[index].Cells[6].Value = item["在库数量"].ToString(); gvShow.Rows[index].Cells[7].Value = item["在途数量"].ToString(); gvShow.Rows[index].Cells[8].Value = item["理论库存"].ToString(); gvShow.Rows[index].Cells[9].Value = item["月出货数量"].ToString(); gvShow.Rows[index].Cells[10].Value = item["理论周转"].ToString(); gvShow.Rows[index].Cells[11].Value = item["标准周转"].ToString(); gvShow.Rows[index].Cells[12].Value = item["订单数量"].ToString(); gvShow.Rows[index].Cells[13].Value = item["赠品数量"].ToString(); gvShow.Rows[index].Cells[14].Value = item["订单金额"].ToString(); } } MessageBox.Show("导入成功", "提示", MessageBoxButtons.OK, MessageBoxIcon.Asterisk); } }
/// <summary> /// 从Excel中获取数据到DataTable /// </summary> /// <param name="workbook">要处理的工作薄</param> /// <param name="SheetName">要获取数据的工作表名称</param> /// <param name="HeaderRowIndex">工作表标题行所在行号(从0开始)</param> /// <returns></returns> public static DataTable RenderDataTableFromExcel(IWorkbook workbook, string SheetName, int HeaderRowIndex) { ISheet sheet = workbook.GetSheet(SheetName); DataTable table = new DataTable(); try { 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; #region 循环各行各列,写入数据到DataTable 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++) { ICell cell = row.GetCell(j); if (cell == null) { dataRow[j] = null; } else { //dataRow[j] = cell.ToString(); switch (cell.CellType) { case CellType.BLANK: dataRow[j] = null; break; case CellType.BOOLEAN: dataRow[j] = cell.BooleanCellValue; break; case CellType.NUMERIC: dataRow[j] = cell.ToString(); break; case CellType.STRING: dataRow[j] = cell.StringCellValue; break; case CellType.ERROR: dataRow[j] = cell.ErrorCellValue; break; case CellType.FORMULA: default: dataRow[j] = "=" + cell.CellFormula; break; } } } table.Rows.Add(dataRow); } #endregion } catch (System.Exception ex) { table.Clear(); table.Columns.Clear(); table.Columns.Add("出错了"); DataRow dr = table.NewRow(); dr[0] = ex.Message; table.Rows.Add(dr); return table; } finally { //sheet.Dispose(); workbook = null; sheet = null; } #region 清除最后的空行 for (int i = table.Rows.Count - 1; i > 0; i--) { bool isnull = true; for (int j = 0; j < table.Columns.Count; j++) { if (table.Rows[i][j] != null) { if (table.Rows[i][j].ToString() != "") { isnull = false; break; } } } if (isnull) { table.Rows[i].Delete(); } } #endregion return table; }
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原文地址：http://www.cnblogs.com/wuxiaohui/p/4319264.html
