C#对Excel的读写操作

读取Excel，首先要添加Microsoft.Office.Interop.Excel 12.0 动态库

读取工作薄中的sheets

public ArrayList loadExcelSheets(String filename) { ArrayList sheets = new ArrayList(); using (OleDbConnection conn = new OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + filename + ";Extended Properties='Excel 12.0;HDR=YES';")) { conn.Open(); System.Data.DataTable dt = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, new object[] { null, null, null, "TABLE" }); foreach (DataRow dr in dt.Rows) { sheets.Add(dr["TABLE_NAME"].ToString()); } } return sheets; }

读取某个sheet中的内容

public System.Data.DataTable loadExcel(String filename, String sheet) { string strSource = @"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + filename + ";Extended Properties='Excel 12.0;HDR=YES';"; OleDbConnection conn = new OleDbConnection(strSource); string sqlstring = @"SELECT * FROM [" + sheet + "]"; OleDbDataAdapter adapter = new OleDbDataAdapter(sqlstring, conn); DataSet da = new DataSet(); try { adapter.Fill(da); } catch (Exception e) { throw new Exception(e.Message); } System.Data.DataTable dt = da.Tables[0]; return dt; }

写入excel

public void saveExcel(String excel, ArrayList data) { //开始写入workbook Microsoft.Office.Interop.Excel.Application app = new Microsoft.Office.Interop.Excel.ApplicationClass(); app.Visible = false; //false 表示程序进行时workbook不被可见地打开，true表示执行时excel被打开，并可视其写入过程。 Workbook wBook = app.Workbooks.Add(true); //新建Workbook的方式 //Workbook wBook = app.Workbooks.Open(conf + template, 0, false, 5, "", "", false, Microsoft.Office.Interop.Excel.XlPlatform.xlWindows, "", true, false, 0, true, false, false);//打开Workbook的方式 Worksheet wSheet = wBook.Worksheets[1] as Worksheet; //写入数据 writeDataToSheet(wSheet, data); dt = null; //清空Datatable //设置禁止弹出保存和覆盖的询问提示框 app.DisplayAlerts = false; app.AlertBeforeOverwriting = false; try { wBook.SaveAs(excel, XlFileFormat.xlWorkbookNormal, Type.Missing, Type. Missing, false, false, XlSaveAsAccessMode.xlShared, XlSaveConflictResolution.xlLocalSessionChanges, false, Type.Missing, Type. Missing, Type.Missing); } catch (Exception e) { throw new Exception(e.Message); } wBook.Close(null); //关闭workbook,防止程序关闭后文件继续被打开 app.Quit(); app = null; System.GC.Collect(); }

一些单元格样式

Range range1 = (Range)wSheet.get_Range(wSheet.Cells[7, 2], wSheet.Cells[7 + size - 1, 2]); Range range2 = (Range)wSheet.get_Range(wSheet.Cells[7, 3], wSheet.Cells[7 + size - 1, 3]); Range range3 = (Range)wSheet.get_Range(wSheet.Cells[7 + size, 2], wSheet.Cells[7 + size, 4]); range1.ColumnWidth = "10"; range1.Merge(null); range1.VerticalAlignment = XlVAlign.xlVAlignCenter; range1.HorizontalAlignment = XlHAlign.xlHAlignCenter; range2.ColumnWidth = "13"; range2.ColumnWidth = "13"; range3.Merge(null); range3.HorizontalAlignment = XlHAlign.xlHAlignRight;