C# 未安装Office环境下使用NPOI导出Excel文件
1、NuGet直接安装NPOI程序包;
2、
using NPOI.XSSF.UserModel;
3、导出Excel代码:
private void TsbExport2ExcelClick(object sender, EventArgs e) { //获取qrkey ToolStripButton tsbFiterBy = ((ToolStripButton)sender); long qryRKEY = Convert.ToInt64(tsbFiterBy.Name.Replace("TsbExport2Excel", string.Empty)); QARRect qr = QryAndRptList.Find(q => q.QryRKEY == qryRKEY); if (qr == null) { MyMsg.Warning("没有找到查询定义条目,请关闭本窗体重试."); return; } A12DataGridView dgvAutoMain = (A12DataGridView)Controls.Find("DGVAutoMain" + qryRKEY, true)[0]; if (dgvAutoMain == null) return; if (dgvAutoMain.Rows.Count <= 0) { MyMsg.Information("没有需要导出的数据,请检查."); return; } TabPage tabPage= (TabPage)Controls.Find("QryTpg" + qryRKEY, true)[0]; string tagSheetName = tabPage.Text; string saveFileName = tabPage.Text + DateTime.Now.ToString("yyyy-MM-dd"); var saveFileDialoge = new SaveFileDialog { FileName = saveFileName, Filter = "Excel Documents|*.xls;*.xlsx;*.xlsm", DefaultExt = ".xlsx" }; if (saveFileDialoge.ShowDialog() != DialogResult.OK) { return; } else { saveFileName = saveFileDialoge.FileName; if (string.IsNullOrEmpty(saveFileName)) { return; } } if (File.Exists(saveFileName)) { File.Delete(saveFileName);//因为在选取文件名称时就有提示是否覆盖,此处直接删除 } //创建或匹配一个BackgroundWorker,初始化一个耗时任务 BackgroundWorker bgwk = new BackgroundWorker(); BgwkDef bgwkDef = new BgwkDef() { RunningAction = delegate () { Export2Excel(bgwk,dgvAutoMain, saveFileName, tagSheetName); }, TagBgwk = bgwk }; BeginBgwork(bgwkDef); }
导出按钮代码
private void Export2Excel(BackgroundWorker bgwk, A12DataGridView tagDGV, string fullSaveFileName, string tagSheetName) { if (string.IsNullOrEmpty(fullSaveFileName)) return; try { bgwk.ReportProgress(1, "正在准备文档..."); NPOI.SS.UserModel.IWorkbook tagWorkbook = new XSSFWorkbook(); NPOI.SS.UserModel.ISheet tagSheet = tagWorkbook.CreateSheet(tagSheetName);//创建一个Sheet #region 标题行 //创建标题行 NPOI.SS.UserModel.IRow rowH = tagSheet.CreateRow(0); //创建单元格样式 NPOI.SS.UserModel.ICellStyle cellStyle = tagWorkbook.CreateCellStyle(); //创建格式 NPOI.SS.UserModel.IDataFormat dataFormat = tagWorkbook.CreateDataFormat(); //设置为文本格式,也可以为 text,即 dataFormat.GetFormat("text"); cellStyle.DataFormat = dataFormat.GetFormat("@"); cellStyle.FillForegroundColor = NPOI.SS.UserModel.IndexedColors.Yellow.Index; cellStyle.FillPattern = NPOI.SS.UserModel.FillPattern.SolidForeground; cellStyle.Alignment = NPOI.SS.UserModel.HorizontalAlignment.Center; cellStyle.VerticalAlignment = NPOI.SS.UserModel.VerticalAlignment.Center; cellStyle.BorderLeft = NPOI.SS.UserModel.BorderStyle.Hair; cellStyle.BorderTop = NPOI.SS.UserModel.BorderStyle.Hair; cellStyle.BorderRight = NPOI.SS.UserModel.BorderStyle.Hair; cellStyle.BorderBottom = NPOI.SS.UserModel.BorderStyle.Hair; //设置列名 foreach (DataGridViewColumn col in tagDGV.Columns) { //创建单元格并设置单元格内容 rowH.CreateCell(col.Index).SetCellValue(col.HeaderText); rowH.Height = 20 * 20; //设置单元格格式,宽度与Datagridview列宽匹配 rowH.Cells[col.Index].CellStyle = cellStyle; tagSheet.SetColumnWidth(col.Index, OString.NZ2Int(col.Width / 7.5 * 356)); } tagSheet.CreateFreezePane(0, 1, 0, 1); #endregion bgwk.ReportProgress(2, "正在准备数据..."); DataTable DTTmp = OData.GetDTFromObject(tagDGV.DataSource).Copy(); bgwk.ReportProgress(50, "正在写入数据到档案中..."); //写入数据 //创建一个单元格 NPOI.SS.UserModel.ICell cell = null; int totColCount = DTTmp.Columns.Count; int totRowCount = DTTmp.Rows.Count; for (int i = 0; i < totRowCount; i++) { //跳过第一行,第一行为列名 NPOI.SS.UserModel.IRow row = tagSheet.CreateRow(i + 1); row.Height = 20* 20; for (int j = 0; j < totColCount; j++) { cell = row.CreateCell(j); #region 根据列类型写入值 Type clmDataType = DTTmp.Columns[j].DataType; if ((clmDataType == typeof(char)) || (clmDataType == typeof(Guid))|| (clmDataType == typeof(string))) { cell.SetCellValue(OString.NZ2Str(DTTmp.Rows[i][j])); } else if(clmDataType == typeof(bool)) { cell.SetCellValue(OString.NZ2Bool(DTTmp.Rows[i][j])); } else if ((clmDataType == typeof(byte)) || (clmDataType == typeof(decimal)) || (clmDataType == typeof(double)) || (clmDataType == typeof(short)) || (clmDataType == typeof(int)) || (clmDataType == typeof(long)) || (clmDataType == typeof(sbyte)) || (clmDataType == typeof(float)) || (clmDataType == typeof(TimeSpan)) || (clmDataType == typeof(ushort)) || (clmDataType == typeof(uint)) || (clmDataType == typeof(ulong))) { cell.SetCellValue(OString.NZ2Double(DTTmp.Rows[i][j])); } else if(clmDataType == typeof(DateTime)) { cell.SetCellValue(Convert.ToDateTime(OString.NZ2DateTime(DTTmp.Rows[i][j]))); //创建单元格样式 NPOI.SS.UserModel.ICellStyle cellStyleValues = tagWorkbook.CreateCellStyle(); //创建格式 NPOI.SS.UserModel.IDataFormat dataFormatValues = tagWorkbook.CreateDataFormat(); if (cell.NumericCellValue.ToString().IndexOf('.') == -1) { cellStyleValues.DataFormat = dataFormatValues.GetFormat("yyyy-mm-dd"); } else { cellStyleValues.DataFormat = dataFormatValues.GetFormat("yyyy-mm-dd hh:mm:ss"); } //设置单元格格式 cell.CellStyle = cellStyleValues; } else { cell.SetCellValue(OString.NZ2Str(DTTmp.Rows[i][j])); } #endregion } } bgwk.ReportProgress(95, "正在保存档案..."); tagWorkbook.Write(new FileStream(fullSaveFileName, FileMode.Create, FileAccess.ReadWrite)); bgwk.ReportProgress(100, "导出成功!"); return; } catch (Exception ex) { CancelBgwork(bgwk); MyMsg.Exclamation("导出数据失败,请检查!",ex.Message); return; } }
核心导出代码
这2段摘自框架的通用数据分析平台,其中采用了后台导出任务对话框,可以参考其它文章。