单表头，多表头导出excel

一、单表头

 1  #region 导出
 2             if (this.dgvInfo.Rows.Count > 0)
 3             {
 4                 SaveFileDialog saveFileDialog = new SaveFileDialog();
 5                 saveFileDialog.DefaultExt = "xls";
 6                 saveFileDialog.Filter = "EXCEL文件(*.XLS)|*.xls";
 7                 saveFileDialog.FilterIndex = 0;
 8                 saveFileDialog.FileName = "单据明细";
 9                 saveFileDialog.RestoreDirectory = true;
10                 saveFileDialog.CreatePrompt = true;
11                 saveFileDialog.Title = "导出到EXCEL";
12                 saveFileDialog.ShowDialog();
13                 if (saveFileDialog.FileName == "")
14                     return;
15                 Stream myStream;
16                 myStream = saveFileDialog.OpenFile();
17                 StreamWriter sw = new StreamWriter(myStream, System.Text.Encoding.GetEncoding(-0));
18                 string str = "";
19                 try
20                 {
21                     for (int i = 0; i < this.dgvInfo.ColumnCount; i++)
22                     {
23                         if (i > 0)
24                         {
25                             str += "\t";
26                         }
27                         str += dgvInfo.Columns[i].HeaderText;
28                     }
29                     sw.WriteLine(str);
30                     for (int j = 0; j < dgvInfo.Rows.Count; j++)
31                     {
32                         string tempStr = "";
33                         for (int k = 0; k < dgvInfo.Columns.Count; k++)
34                         {
35                             if (k > 0)
36                             {
37                                 tempStr += "\t";
38                             }
39                             if (dgvInfo.Rows[j].Cells[k].Value == null)
40                             {
41                                 dgvInfo.Rows[j].Cells[k].Value = "";
42                             }
43                             tempStr += dgvInfo.Rows[j].Cells[k].Value.ToString();
44                         }
45                         sw.WriteLine(tempStr);
46                     }
47                     sw.Close();
48                     myStream.Close();
49                 }
50                 catch (Exception ex)
51                 {
52                     MessageBox.Show(ex.ToString());
53                 }
54                 finally
55                 {
56                     sw.Close();
57                     myStream.Close();
58                 }
59             }
60             #endregion

二、表多头

 1             try
 2             {
 3                 if (treedgv.Rows.Count > 0)
 4                 {
 5                     string sFile = System.Windows.Forms.Application.StartupPath;
 6
 7                     //Missing 在System.Reflection命名空间下。
 8                     //string sFileSave = sFile + "\\" + DateTime.Now.ToString("yyyyMMddHHmmss") + "一天一业绩.xls";
 9
10                     SaveFileDialog saveFileDialog = new SaveFileDialog();
11                     saveFileDialog.DefaultExt = "xls";
12                     saveFileDialog.Filter = "EXCEL文件(*.XLS)|*.xls";
13                     saveFileDialog.FilterIndex = 0;
14                     saveFileDialog.FileName = DateTime.Now.ToString("yyyyMMddHHmmss") + "支付方式";
15                     saveFileDialog.RestoreDirectory = true;
16                     saveFileDialog.CreatePrompt = true;
17                     saveFileDialog.Title = "导出到EXCEL";
18                     saveFileDialog.ShowDialog();
19                     if (saveFileDialog.FileName == "")
20                         return;
21
22                     //需要添加 Microsoft.Office.Interop.Excel引用
23                     Microsoft.Office.Interop.Excel.Application app = new Microsoft.Office.Interop.Excel.Application();
24
25                     app.Visible = false;
26                     app.UserControl = true;
27                     Microsoft.Office.Interop.Excel.Workbooks workbooks = app.Workbooks;
28                     Microsoft.Office.Interop.Excel._Workbook workbook = workbooks.Add(sFile + "\\支付方式.xls"); //加载模板
29                     Microsoft.Office.Interop.Excel.Sheets sheets = workbook.Sheets;
30                     Microsoft.Office.Interop.Excel._Worksheet worksheet = (Microsoft.Office.Interop.Excel._Worksheet)sheets.get_Item(1); //第一个工作薄。
31                     if (worksheet == null)
32                         return;  //工作薄中没有工作表.
33
34                     ////写入数据，Excel索引从1开始。
35
36                     for (int i = 1; i <= treedgv.Rows.Count; i++)
37                     {
38                         int row_ = 3 + i;  //Excel模板上表头和标题行占了2行,根据实际模板需要修改;
39                         int dt_row = i - 1; //dataTable的行是从0开始的。
40                         //worksheet.Cells[row_, 1] = i.ToString();
41                         for (int j = 1; j <= treedgv.Columns.Count; j++)
42                         {
43                             if (treedgv.Rows[0].Cells["Column" + j].Value.ToString() != "")
44                             {
45                                 worksheet.Cells[row_, j] = treedgv.Rows[i-1].Cells["Column" + j].Value.ToString();
46                             }
47                         }
48
49                     }
50
51
52                     workbook.SaveAs(saveFileDialog.FileName, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlNoChange, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value);
53
54
55                     workbook.Close(null, null, null);
56                     workbooks.Close();
57                     worksheet = null;
58                     app.Quit();
59                     app = null;
60                 }
61             }
62             catch (Exception)
63             {
64
65                 MessageBox.Show("导出失败！", "异常");
66             }

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