求解救!!代码问题
if (deleteOldFile) { if (System.IO.File.Exists(outputPath)) { System.IO.File.Delete(outputPath); } } // Create the Excel Application object ApplicationClass excelApp = new ApplicationClass(); // Create a new Excel Workbook Workbook excelWorkbook = excelApp.Workbooks.Add(Type.Missing); int sheetIndex = 0; // Copy each DataTable 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); 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; } //excelApp.Application.AlertBeforeOverwriting = false; excelApp.Application.DisplayAlerts = false; // 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, Type.Missing); excelWorkbook.Close(true, Type.Missing, Type.Missing); excelWorkbook = null; // Release the Application object excelApp.Quit(); excelApp = null; // Collect the unreferenced objects GC.Collect(); GC.WaitForPendingFinalizers();