C# Excel 操作

将Excel 文件导入到dataGridView中

 1 /// Excel数据导入DataGridView

 2         public void EcxelToDataGridView(string filePath, DataGridView dgv)

 3         {

 4             //根据路径打开一个Excel文件并将数据填充到DataSet中

 5             //string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source = " + filePath + ";Extended Properties ='Excel 8.0;HDR=NO;IMEX=1'";//HDR=YES 有两个值:YES/NO,表示第一行是否字段名,默认是YES,第一行是字段名

 6 

 7             string strConn = "Provider=Microsoft.ACE.OLEDB.12.0;" + "Data Source=" + filePath + ";" + "Extended Properties='Excel 12.0;HDR=Yes;IMEX=1'";

 8 

 9             OleDbConnection conn = new OleDbConnection(strConn);

10             conn.Open();

11             string strExcel = "";

12             OleDbDataAdapter myCommand = null;

13             DataSet ds = null;

14             strExcel = "select  * from   [sheet1$]";

15             myCommand = new OleDbDataAdapter(strExcel, strConn);

16             ds = new DataSet();

17             myCommand.Fill(ds, "table1");

18 

19             //conn.Close();

20             //dgv.DataMember = "[sheet1$]";

21             //dgv.DataSource = ds;

22             //return;

23 

24             //根据DataGridView的列构造一个新的DataTable

25             System.Data.DataTable tb = new System.Data.DataTable();

26 

27             tb = ds.Tables["table1"];

28 

29             //foreach (DataGridViewColumn dgvc in dgv.Columns)

30             //{

31             //    if (dgvc.Visible && dgvc.CellType != typeof(DataGridViewCheckBoxCell))

32             //    {

33             //        DataColumn dc = new DataColumn();

34             //        dc.ColumnName = dgvc.DataPropertyName;

35             //        //dc.DataType = dgvc.ValueType;//若需要限制导入时的数据类型则取消注释，前提是DataGridView必须先绑定一个数据源那怕是空的DataTable

36           

37             dgv.Columns.Clear();

38             //在DataGridView中显示导入的数据

39             dgv.DataSource = tb;

40 

41             dgv.DefaultCellStyle.BackColor = Color.AliceBlue; //单元格背景颜色

42             dgv.AlternatingRowsDefaultCellStyle.BackColor = Color.LightSkyBlue; //奇数行的背景色

43             //datagridview backcolor 

44             dgv.DefaultCellStyle.SelectionBackColor = Color.LimeGreen; //选中单元格颜色

45             dgv.DefaultCellStyle.SelectionForeColor = Color.Blue; //选中单元格内字体颜色

46 

47             dgv.DefaultCellStyle.Font = new System.Drawing.Font("Arial", 9, FontStyle.Regular);//单元格内文本的字体设置

48             dgv.DefaultCellStyle.ForeColor = Color.Black; //单元格内字体颜色 

49             dgv.ColumnHeadersBorderStyle = DataGridViewHeaderBorderStyle.Single; //列标题格式

50             dgv.ColumnHeadersVisible = true;   //列标题可见

51             dgv.ColumnHeadersDefaultCellStyle.Font = new System.Drawing.Font("Arial", 9, FontStyle.Bold); //列标题字体设置

52             dgv.ColumnHeadersDefaultCellStyle.BackColor = Color.LimeGreen;  //列标头背景色

53             dgv.ColumnHeadersDefaultCellStyle.ForeColor = Color.Blue;

54 

55             dgv.Columns[0].Width = 100;

56             dgv.Columns[1].Width = 100;

57             dgv.Columns[2].Width = 280;

58 

59             dgv.RowHeadersVisible = false;

60             dgv.AllowUserToAddRows = false;

61             dgv.AllowUserToResizeColumns = false;

62             dgv.AllowUserToResizeRows = false;

63             //dgv.ReadOnly = true;

64 

65             dgv.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.Fill;

66         }

View Code

将dataGridView保存为Excel文件

 1  /// <summary>

 2         /// DataGridView数据保存为Excel

 3         /// </summary>

 4         private void ExportExc()

 5         {

 6             SaveFileDialog dg = new SaveFileDialog();//保存文件对话框，选择导出文件的存放位置

 7             dg.Filter = "xls files(*.xls)|*.xls";//保存为xls格式

 8             if (dg.ShowDialog() == DialogResult.OK)

 9             {

10                 string filepath = dg.FileName.ToString();//保存文件的路径

11 

12                 Microsoft.Office.Interop.Excel.Workbooks objBooks;//接口 workbooks

13                 Microsoft.Office.Interop.Excel.Sheets objSheets;// 接口 sheets

14                 Microsoft.Office.Interop.Excel._Worksheet objSheet;//接口 worksheet

15                 excel = new Microsoft.Office.Interop.Excel.Application();

16                 objBooks = excel.Workbooks;

17                 Object miss = System.Reflection.Missing.Value;

18                 objBook = objBooks.Add(miss);

19                 objSheets = objBook.Sheets;

20                 objSheet = (Microsoft.Office.Interop.Excel._Worksheet)objSheets[1];

21                 try

22                 {

23 

24                     if (dataGridView1.Rows.Count == 0) //没有数据的话就不往下执行   

25                         return;

26 

27 

28                     excel.Visible = false; //让后台执行设置为不可见，为true的话会看到打开一个Excel，然后数据在往里写   

29 

30                     for (int i = 0; i < dataGridView1.Columns.Count; i++) //生成Excel中列头名称   

31                     {

32                         objSheet.Cells[1, i + 1] = dataGridView1.Columns[i].HeaderText;

33                     }

34 

35                     for (int i = 0; i < dataGridView1.Rows.Count; i++) //把DataGridView当前页的数据保存在Excel中   

36                     {

37                         for (int j = 0; j < dataGridView1.Columns.Count; j++)

38                         {

39                             if (dataGridView1[j, i].ValueType == typeof(string))

40                             {

41                                 objSheet.Cells[i + 2, j + 1] = "'" + dataGridView1[j, i].Value.ToString();

42                             }

43                             else

44                             {

45                                 objSheet.Cells[i + 2, j + 1] = dataGridView1[j, i].Value.ToString();

46                             }

47                         }

48                     }

49                     objBook.SaveCopyAs(filepath);

50                     //设置禁止弹出保存和覆盖的询问提示框   

51                     excel.DisplayAlerts = false;

52                     excel.AlertBeforeOverwriting = false;

53 

54                     //确保Excel进程关闭   

55                     objBooks.Close();

56                     excel.Workbooks.Close();

57                     excel.Quit();

58                     excel = null;

59                     GC.Collect();

60                     MessageBox.Show("数据导出完成!", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);

61                     if (System.IO.File.Exists(filepath))

62                         System.Diagnostics.Process.Start(filepath); //保存成功后打开此文件

63 

64                 }

65                 catch (Exception ex)

66                 {

67                     MessageBox.Show(ex.Message, "错误提示");

68                 }

69             }

70         }

View Code