C# 未安裝Office環境下使用NPOI導出Excel文件
阿新 • • 發佈：2019-02-19
標題 let 正在 創建 for .sh pan -a 一行 
1、NuGet直接安裝NPOI程序包；
2、
using NPOI.XSSF.UserModel;
3、導出Excel代碼：
private void TsbExport2ExcelClick(object sender, EventArgs e) { //獲取qrkey ToolStripButton tsbFiterBy = ((ToolStripButton)sender); long qryRKEY = Convert.ToInt64(tsbFiterBy.Name.Replace("導出按鈕代碼TsbExport2Excel", string.Empty)); QARRect qr = QryAndRptList.Find(q => q.QryRKEY == qryRKEY); if (qr == null) { MyMsg.Warning("沒有找到查詢定義條目,請關閉本窗體重試."); return; } A12DataGridView dgvAutoMain = (A12DataGridView)Controls.Find("DGVAutoMain" + qryRKEY, true)[0]; if (dgvAutoMain == null) return; if (dgvAutoMain.Rows.Count <= 0) { MyMsg.Information("沒有需要導出的數據,請檢查."); 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);//因為在選取文件名稱時就有提示是否覆蓋，此處直接刪除 } //創建或匹配一個BackgroundWorker,初始化一個耗時任務 BackgroundWorker bgwk = new BackgroundWorker(); BgwkDef bgwkDef = new BgwkDef() { RunningAction = delegate () { Export2Excel(bgwk,dgvAutoMain, saveFileName, tagSheetName); }, TagBgwk = bgwk }; BeginBgwork(bgwkDef); }
private void Export2Excel(BackgroundWorker bgwk, A12DataGridView tagDGV, string fullSaveFileName, string tagSheetName) { if (string.IsNullOrEmpty(fullSaveFileName)) return; try { bgwk.ReportProgress(1, "正在準備文檔..."); NPOI.SS.UserModel.IWorkbook tagWorkbook = new XSSFWorkbook(); NPOI.SS.UserModel.ISheet tagSheet = tagWorkbook.CreateSheet(tagSheetName);//創建一個Sheet #region 標題行 //創建標題行 NPOI.SS.UserModel.IRow rowH = tagSheet.CreateRow(0); //創建單元格樣式 NPOI.SS.UserModel.ICellStyle cellStyle = tagWorkbook.CreateCellStyle(); //創建格式 NPOI.SS.UserModel.IDataFormat dataFormat = tagWorkbook.CreateDataFormat(); //設置為文本格式，也可以為 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; //設置列名 foreach (DataGridViewColumn col in tagDGV.Columns) { //創建單元格並設置單元格內容 rowH.CreateCell(col.Index).SetCellValue(col.HeaderText); rowH.Height = 20 * 20; //設置單元格格式，寬度與Datagridview列寬匹配 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, "正在準備數據..."); DataTable DTTmp = OData.GetDTFromObject(tagDGV.DataSource).Copy(); bgwk.ReportProgress(50, "正在寫入數據到檔案中..."); //寫入數據 //創建一個單元格 NPOI.SS.UserModel.ICell cell = null; int totColCount = DTTmp.Columns.Count; int totRowCount = DTTmp.Rows.Count; for (int i = 0; i < totRowCount; i++) { //跳過第一行，第一行為列名 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 根據列類型寫入值 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]))); //創建單元格樣式 NPOI.SS.UserModel.ICellStyle cellStyleValues = tagWorkbook.CreateCellStyle(); //創建格式 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"); } //設置單元格格式 cell.CellStyle = cellStyleValues; } else { cell.SetCellValue(OString.NZ2Str(DTTmp.Rows[i][j])); } #endregion } } bgwk.ReportProgress(95, "正在保存檔案..."); tagWorkbook.Write(new FileStream(fullSaveFileName, FileMode.Create, FileAccess.ReadWrite)); bgwk.ReportProgress(100, "導出成功!"); return; } catch (Exception ex) { CancelBgwork(bgwk); MyMsg.Exclamation("導出數據失敗，請檢查！",ex.Message); return; } }核心導出代碼
這2段摘自框架的通用數據分析平臺，其中采用了後臺導出任務對話框，可以參考其它文章。
C# 未安裝Office環境下使用NPOI導出Excel文件