Excel文件操作的集合

1.一個讀取Excel文件並綁定到DataSet的方法. 2.將數據從DataSet倒入到Excel文件的方法. 1.一個讀取Excel文件並綁定到DataSet的方法. private DataSet GetExcelDataIntoDataSet(string strExcelFilePath,string strSheetName) { FileInfo fileInfo = new FileInfo(strExcelFilePath); if (!fileInfo.Exists) return null; string strConn = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + strExcelFilePath + ";Extended Properties='Excel 8.0;HDR=NO;IMEX=1'"; System.Data.OleDb.OleDbConnection objConn = new System.Data.OleDb.OleDbConnection(strConn); DataSet dsExcel = new DataSet(); try { objConn.Open(); string strSql = "select * from [" + strSheetName + "$]"; System.Data.OleDb.OleDbDataAdapter odbcExcelDataAdapter = new System.Data.OleDb.OleDbDataAdapter(strSql, objConn); odbcExcelDataAdapter.Fill(dsExcel,"ExcelData"); return dsExcel; } catch (Exception ex) { throw ex; } } 2.將數據從DataSet倒入到Excel文件的方法. private void Test() { try { DataSet ds = GetDataSet(); ExportToExcelNoFormat(ds, strFile); // 倒入操作結束,打開Excel文件操作 GC.Collect(); GC.WaitForPendingFinalizers(); Process p = new Process(); p.StartInfo.FileName = strFile; p.Start(); } catch (System.Data.SqlClient.SqlException ex) { MessageType.E0001.CreateDialog(SecName).Show(); } catch (Exception ex) { throw ex; } } public static void ExportToExcelNoFormat(DataSet dataSet, string outputPath) { try { string strDir = new System.IO.FileInfo(outputPath).Directory.FullName; if (!System.IO.Directory.Exists(strDir)) System.IO.Directory.CreateDirectory(strDir); // Create the Excel Application object ApplicationClass excelApp = new ApplicationClass(); // Create a new Excel Workbook Workbook excelWorkbook = excelApp.Workbooks.Add(Type.Missing); int sheetIndex = 0; List excelSheetList = new List(); Range myrange = null; foreach (System.Data.DataTable dt in dataSet.Tables) { // Copy the DataTable to an object array object[,] rawData = new object[dt.Rows.Count + 1, dt.Columns.Count]; // Copy the column names to the first row of the object array for (int col = 0; col < dt.Columns.Count; col++) { rawData[0, col] = dt.Columns[col].ColumnName; } // Copy the values to the object array for (int col = 0; col < dt.Columns.Count; col++) { for (int row = 0; row < dt.Rows.Count; row++) { rawData[row + 1, col] = dt.Rows[row].ItemArray[col]; } } // Calculate the final column letter string finalColLetter = string.Empty; string colCharset = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"; int colCharsetLen = colCharset.Length; if (dt.Columns.Count > colCharsetLen) { finalColLetter = colCharset.Substring( (dt.Columns.Count - 1) / colCharsetLen - 1, 1); } finalColLetter += colCharset.Substring( (dt.Columns.Count - 1) % colCharsetLen, 1); // Create a new Sheet Worksheet excelSheet = (Worksheet)excelWorkbook.Sheets.Add( excelWorkbook.Sheets.get_Item(++sheetIndex), Type.Missing, 1, XlSheetType.xlWorksheet); //Format Date type int iCln = 0; foreach (DataColumn dcln in dt.Columns) { iCln++; if (dcln.DataType == typeof(DateTime)) { myrange = excelSheet.get_Range(excelSheet.Cells[2, Convert.ToInt16(iCln)], excelSheet.Cells[dt.Rows.Count + 1, Convert.ToInt16(iCln)]); myrange.NumberFormat = "yyyy-MM-dd"; } } excelSheetList.Add(excelSheet); excelSheet.Name = dt.TableName; // Fast data export to Excel string excelRange = string.Format("A1:{0}{1}", finalColLetter, dt.Rows.Count + 1); excelSheet.get_Range(excelRange, Type.Missing).Value2 = rawData; // Mark the first row as BOLD ((Range)excelSheet.Rows[1, Type.Missing]).Font.Bold = true; excelSheet.Columns.EntireColumn.AutoFit(); } // Save and Close the Workbook excelWorkbook.SaveAs(outputPath, XlFileFormat.xlWorkbookNormal, Type.Missing, Type.Missing, Type.Missing, Type.Missing, XlSaveAsAccessMode.xlExclusive, Type.Missing, Type.Missing, Type.Missing, Type.Missing); excelWorkbook.Close(true, Type.Missing, Type.Missing); // Release the Application object excelApp.Quit(); //System.Runtime.InteropServices.Marshal.ReleaseComObject(excelSheetList); System.Runtime.InteropServices.Marshal.ReleaseComObject(excelWorkbook); System.Runtime.InteropServices.Marshal.ReleaseComObject(excelApp); excelWorkbook = null; excelApp = null; // Collect the unreferenced objects //GC.Collect(); //GC.WaitForPendingFinalizers(); } catch (Exception ex) { throw ex; } }