C#操作excel(多种方法比较)

我们在做excel资料的时候，通常有以下方法。

一.导入导出excel常用方法：

1.用查询表的方式查询并show在数据集控件上。

public static string strCon = " Provider = Microsoft.Jet.OLEDB.4.0 ; Data Source =C:\\08.xls;Extended Properties=Excel 8.0";

public static DataSet ds;

protected void Page_Load(object sender, EventArgs e)

{

　　OleDbConnection conn = new OleDbConnection(strCon);

　　string sql = "select * from [Sheet1$]";

　　conn.Open();

　　OleDbDataAdapter myCommand = new OleDbDataAdapter(sql, strCon);

　　ds = new DataSet();

　　myCommand.Fill(ds, "[Sheet1$]");

　　conn.Close();

　　datagrid1.DataMember = "[Sheet1$]";

　　datagrid1.DataSource = ds;

　　datagrid1.DataBind();

　　//Excel.Application excel = new Excel.Application();

　　//excel.Application.Workbooks.Add(true);

　　//excel.Visible = true;

}

2.一个一个单元格的进行插入

1 string str = @"Data Source=IT-428E4EA4B0C7\SQLEXPRESS;Initial Catalog=TestBase;Integrated Security=True";

2 SqlConnection conn = new SqlConnection(str);

3 conn.Open();

4 int n = 0;

5 for (int i = 1; i < 20; i++)

6 {

7 　　if (n > 3)

8 　　　　break;

9 　　elseif (msheet.Cells.get_Range("A" + i, Type.Missing).Text.ToString() == "" && n <= 3)

11 　　　　　　{ n++; }

12 　 else

13 　{

14  　 　　　　//循环获取excel单元格的值一次一次的插入，excuteSql为执行的存储过程

15     　　　　excuteSql(

　　　　　　　　　msheet.Cells.get_Range("B" + i, Type.Missing).Text.ToString(),

16　　 　　　　　　sheet.Cells.get_Range("B" + (i + 1), Type.Missing).Text.ToString(),

17 　　　　　　　　msheet.Cells.get_Range("B" + (i + 2), Type.Missing).Text.ToString(),

18 　　　　　　　　conn

　　　　　　　　);

19 　　　　　　i = i + 3;

20

21 　　}

22 }

23

24 conn.Close();

二快速导入导出

1.我们都知道当向db里批量插入数据的时候我们会选择SqlBulkCopy

if (dataTable!=null && dataTable.Rows.Count!=0)
            {
                sqlBulkCopy.WriteToServer(dataTable);
            }

这个可以看 深山老林新发的一篇SQLServer中批量插入数据方式的性能对比下面是SqlBulkCopy的方法，这个方法有一个弊端就是当excel某一列即有文字，还有日期的时候，会出现null值，我在网上查了一些资料说连接字串加上;HDR=YES;IMEX=1‘的时候会都当做字符处理，但是还是会出现一些bug，所以建议最好先把excel数据分析到datatable里然后再用SqlBulkCopy倒入数据库

1 // block copy to DB from Excel

2 //By xijun,

3 //step 1 create an excel file C:\Inetpub\wwwroot\test.xls , fill cell(1,1) with "Data",cell(1,2) with "name"

4 //step 2 create table named "Data" with 2 column ("data","name") in your DB

5 //there the code below:

6 DateTime t1 = DateTime.Now;

7 Response.Write("<br>start time:" + t1.ToString());

8 string ExcelFile = @"C:\\20090916_Hub_Report.xls";

9 string excelConnectionString = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + ExcelFile + ";Extended Properties=‘Excel 8.0;HDR=YES;IMEX=1‘";

10

11 using (OleDbConnection excelConnection = new OleDbConnection(excelConnectionString))

12 {

13

14 excelConnection.Open();

15 //Getting source data

16 //非空讀入數據

17 OleDbCommand command = new OleDbCommand("Select [Region],[CustomerPN],[RMA],[Date],[QTY],[Return/Pull] FROM [20090916_Hub_Report$] ", excelConnection);

18 // Initialize SqlBulkCopy object

19

20 using (OleDbDataReader dr = command.ExecuteReader())

21 {

22 // Copy data to destination

23 string sqlConnectionString = @"Data Source=MININT-G87PHNA\SQLEXPRESS;Initial Catalog=GDS_Service;Integrated Security=True";

24 using (SqlBulkCopy bulkCopy = new SqlBulkCopy(sqlConnectionString))

25 {

26 bulkCopy.DestinationTableName = "GDS_Hub_data";

27 //加入只加入一個列的話,那么就會其他數據庫列都默認為空。

28 bulkCopy.ColumnMappings.Add("Region", "region");

29 bulkCopy.ColumnMappings.Add("CustomerPN", "customer_item_number");

30 bulkCopy.ColumnMappings.Add("RMA", "Rma");

31 bulkCopy.ColumnMappings.Add("Date", "date");

32 bulkCopy.ColumnMappings.Add("QTY", "Qty_1");

33 bulkCopy.ColumnMappings.Add("Return/Pull", "return_pull");

34 //bcp.BatchSize = 100;//每次传输的行数

35 //bcp.NotifyAfter = 100;//进度提示的行数

36 bulkCopy.BatchSize = 100;

37 bulkCopy.NotifyAfter = 100;

38 bulkCopy.WriteToServer((IDataReader)dr);

39 40 41 }

42 }

43 //Closing connection

44 excelConnection.Close();

45 } 46

47 DateTime t2 = DateTime.Now;

48 Response.Write("<br>End time:" + t2.ToString());

49 Response.Write("<br>use time:" + ((TimeSpan)(t2 - t1)).Milliseconds.ToString() + " Milliseconds");

50 Response.Write("<br>inser record count :3307");

 2.快速导出db的数据到excel

这种方法就是利用

Excel.QueryTables 
 Excel.QueryTable

Querytable把数据快速导入excel里。我们在做复杂报表的时候，这个用的是比较多了，但是单单会这个没有用，它只是快速的把db里的数据放放到excel里，

在做大量数据而且需要设定excel样式的时候我们会选择先用这种方法把数据导入excel一个临时sheet，再利sheet复制，sheet移动，和一些excel样式设定，以及

excel一个强大的自动填充的功能，那么这些就可以让我们快速的做出花样多试的excel报表，当然这个要求我们比较熟练office的操作，包括宏的操作。

代码

1 public string query_table_getdata(string sourpath) 2 { 3 string str_path = sourpath.Substring(0, sourpath.Length - 22); 4 str_path = str_path + "basic.xls"; 5 6 Excel.QueryTables m_objQryTables = null; 7 Excel.QueryTable m_objQryTable = null; 8 Excel.Application m_objExcel = null; 9 Excel.Workbooks m_objBooks = null; 10 Excel.Workbook m_objBook = null; 11 Excel.Sheets m_objSheets = null; 12 Excel.Worksheet m_objSheet = null; 13 Excel.Range m_objRange = null; 14 m_objExcel = new Excel.Application(); 15 16 //try 17 //{ 18 m_objBooks = m_objExcel.Workbooks; 19 m_objBooks.Open(sourpath, Type.Missing, Type.Missing, Type.Missing, Type.Missing, 20 Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing); 21 22 m_objBook = (Excel.Workbook)m_objBooks.get_Item(1); 23 24 25 m_objSheets = (Excel.Sheets)m_objBook.Worksheets; 26 m_objSheet = (Excel.Worksheet)m_objSheets.get_Item(1); 27 m_objRange = m_objSheet.get_Range("A2", Type.Missing); 28 m_objQryTables = m_objSheet.QueryTables; 29 string sqlstr = "SELECT [day01],[day02],[day03],[day04],[day05],[day06],[day07],[day08],[day09],[day10],[day11],[day12],[day13],[day14]"; 30 sqlstr += ",[week01] ,[week02],[week03],[week04],[week05],[week06],[week07],[week08],[week09],[week10],[week11],[week12],[week13],[week14]"; 31 sqlstr += ",[week15],[week16],[week17],[week18],[week19],[week20],[week21],[week22],[week23],[week24]"; 32 sqlstr += " FROM [GDS_Service].[dbo].[GDS_Service_Report_Base] order by groupID ,id"; 33 //可以放在配置文件里 34 string conn = @"Provider=SQLOLEDB.1;Data Source=MININT-G87PHNA\SQLEXPRESS;uid=xijun_ke;Password=12345678;

Initial Catalog=GDS_Service;Persist Security Info=False;"; 35 36 m_objQryTable = (Excel.QueryTable)m_objQryTables.Add("OLEDB;" + conn, m_objRange, sqlstr); 37 38 m_objQryTable.RefreshStyle = Excel.XlCellInsertionMode.xlInsertEntireRows; 39 40 m_objQryTable.Refresh(false); 41 m_objBook.SaveAs(str_path, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Excel.XlSaveAsAccessMode.xlExclusive, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing); 42 m_objBook.Close(false, Type.Missing, Type.Missing); 43 //} 44 //catch (Exception ee) 45 //{ 46 // mp.WriteLog(ee.ToString()); 47 //} 48 //finally 49 //{ 50 m_objExcel.Quit(); 51 GC.Collect(); 52 //} 53 return str_path; 54 55 }

com操作excel的一些特性操作：

range.NumberFormatLocal = "@";     //设置单元格格式为文本 range = (Range)worksheet.get_Range("A1", "E1");     //获取Excel多个单元格区域：本例做为Excel表头 range.Merge(0);     //单元格合并动作 worksheet.Cells[1, 1] = "Excel单元格赋值";     //Excel单元格赋值 range.Font.Size = 15;     //设置字体大小 range.Font.Underline=true;     //设置字体是否有下划线 range.Font.Name="黑体";     设置字体的种类 range.HorizontalAlignment=XlHAlign.xlHAlignCenter;     //设置字体在单元格内的对其方式 range.ColumnWidth=15;     //设置单元格的宽度 range.Cells.Interior.Color=System.Drawing.Color.FromArgb(255,204,153).ToArgb();     //设置单元格的背景色 range.Borders.LineStyle=1;     //设置单元格边框的粗细 range.BorderAround(XlLineStyle.xlContinuous,XlBorderWeight.xlThick,XlColorIndex.xlColorIndexAutomatic,System.Drawing.Color.Black.ToArgb());     //给单元格加边框 range.EntireColumn.AutoFit();     //自动调整列宽 Range.HorizontalAlignment= xlCenter;     // 文本水平居中方式 Range.VerticalAlignment= xlCenter     //文本垂直居中方式 Range.WrapText=true;     //文本自动换行 Range.Interior.ColorIndex=39;     //填充颜色为淡紫色 Range.Font.Color=clBlue;     //字体颜色 xlsApp.DisplayAlerts=false;     //保存Excel的时候，不弹出是否保存的窗口直接进行保存    workbook.SaveCopyAs(temp);/**////填入完信息之后另存到路径及文件名字

excel宏操作，sheet和单元格操作：

代码

1 /// <summary> 2 /// 讀取excel數據和插入公式 3 /// </summary> 4 /// <param name="sender"></param> 5 /// <param name="e"></param> 6 protected void Button2_Click(object sender, EventArgs e) 7 { 8 DateTime t1 = DateTime.Now; 9 Response.Write("<br>start time:" + t1.ToString()); 10 Excel.Application excelkk = new Excel.Application(); 11 12 excelkk.Workbooks.Add(true); 13 int row = 2; 14 DataTable myTable = ds.Tables["[Sheet1$]"]; 15 for (int i = 0; i < myTable.Columns.Count; i++) 16 { 17 excelkk.Cells[1, 1 + i] = myTable.Columns[i].ColumnName.ToString(); 18 } 19 for (int i = 0; i < myTable.Rows.Count; i++) 20 { 21 for (int j = 0; j < myTable.Columns.Count; j++) 22 { 23 excelkk.Cells[row, j + 1] = myTable.Rows[i][j].ToString(); 24 } 25 26 row++; 27 } 28 29 30 //取得特定單元格的值 31 excelkk.Visible = true; 32 this.TextBoxChange.Text = excelkk.get_Range("A2", Type.Missing).Text.ToString(); 33 //表的單元格合并 34 Excel.Range range1 = excelkk.get_Range("A2", "D4"); 35 range1.Merge(Type.Missing); 36 37 38 39 40 //想表格中插入求和的值 41 Excel.Range range2 = excelkk.get_Range("B25", Type.Missing); 42 range2.Formula = "=SUM(B2:B24)"; 43 range2.Calculate(); 44 45 //進行宏的循環應用與單元格的刪除和添加，多個單元格默認宏自動操作。 46 Excel.Range range3 = excelkk.get_Range("B25","E25"); 47 range2.AutoFill(range3,Excel.XlAutoFillType.xlFillDefault); 48 //刪除表的指定行數操作 49 Excel.Range range7 = null; 50 range7 = excelkk.get_Range(excelkk.Cells[2, 2], excelkk.Cells[4, 4]); 51 range7.Select(); 52 range7.EntireRow.Delete(Excel.XlDirection.xlUp); 53 54 //獲取最大用過的行數 55 Excel.Worksheet wsheet1 = (Excel.Worksheet)excelkk.Worksheets.get_Item(1); 56 int n =wsheet1.UsedRange.Cells.Columns.Count; 57 Response.Write(n.ToString() + "<br>"); 58 //MessageBox.Show(n.ToString()); 59 n = wsheet1.UsedRange.Cells.Rows.Count; 60 Response.Write(n.ToString() + "<br>"); 61 //MessageBox.Show(n.ToString()); 62 //數據的複製 63 Excel.Range range4 = excelkk.get_Range("A2", "B25"); 64 Excel.Range range5 = excelkk.get_Range("E3", "F25"); 65 //range4.get_Offset(1,4).Select(); 66 range4.Copy(range5); 67 //停用警告信息 68 excelkk.DisplayAlerts = false; 69 GC.Collect(); 70 71 } 72 73 74 單個sheet里求和： 75 Excel.Range range2 = excelkk.get_Range("B25", Type.Missing); 76 range2.Formula = "=SUM(B2:B24)"; 77 range2.Calculate(); 78 79 跨sheet求和： 80 Excel.Worksheet wsheet1 = (Excel.Worksheet)excelSql.Worksheets.get_Item(1); 81 Excel.Range range3 =wsheet1.get_Range("A23", Type.Missing); 82 range3.Formula = "=Sheet3!B8+Sheet3!B12"; 83 range3.Calculate(); 84