C# 实现Oracle中的数据与Excel之间的转换

最近项目要求实现数据库之间数据在各个数据库之间导入导出，在此做个笔记

1. 将Oracle中的表导入到Excel中，反之亦然

　　 private static readonly string connectionString = ConfigurationManager.ConnectionStrings["OracleConnection"].ConnectionString;
 1  public void print(DataGridView dataGridView1)
         {
             //导出到execl
             try
             {
                 SaveFileDialog saveFileDialog = new SaveFileDialog();
                 saveFileDialog.Filter = "导出Excel2003~2007 (*.xls)|*.xls|导出Excel2010~2013 (*.xlsx)|*.xlsx";
                 saveFileDialog.FilterIndex = ;
                 saveFileDialog.RestoreDirectory = true;
                 saveFileDialog.CreatePrompt = true;
                 saveFileDialog.Title = "导出文件保存路径";
                 saveFileDialog.ShowDialog();
                 string strName = saveFileDialog.FileName;
                 if (strName.Length != )
                 {
                     //没有数据的话就不往下执行
                     if (dataGridView1.Rows.Count == )
                         return;

                     // toolStripProgressBar1.Visible = true;
                     System.Reflection.Missing miss = System.Reflection.Missing.Value;
                     //实例化一个Excel.Application对象
                     Microsoft.Office.Interop.Excel.Application excel = new Microsoft.Office.Interop.Excel.Application();
                     excel.Application.Workbooks.Add(true);
                     excel.Visible = false;//若是true，则在导出的时候会显示EXcel界面。
                     if (excel == null)
                     {
                         MessageBox.Show("EXCEL无法启动！", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
                         return;
                     }
                     Microsoft.Office.Interop.Excel.Workbooks books = (Microsoft.Office.Interop.Excel.Workbooks)excel.Workbooks;
                     Microsoft.Office.Interop.Excel.Workbook book = (Microsoft.Office.Interop.Excel.Workbook)(books.Add(miss));
                     Microsoft.Office.Interop.Excel.Worksheet sheet = (Microsoft.Office.Interop.Excel.Worksheet)book.ActiveSheet;
                     sheet.Name = "test";
                     int m = , n = ;
                     //生成Excel中列头名称
                     for (int i = ; i < dataGridView1.Columns.Count; i++)
                     {
                         excel.Cells[, i + ] = dataGridView1.Columns[i].HeaderText;//输出DataGridView列头名
                     }
                     //把DataGridView当前页的数据保存在Excel中
                     for (int i = ; i < dataGridView1.Rows.Count - ; i++)
                     {
                         for (int j = ; j < dataGridView1.Columns.Count; j++)
                         {
                             if (dataGridView1[j, i].ValueType == typeof(string))
                             {
                                 excel.Cells[i + , j + ] = "'" + dataGridView1[j, i].Value.ToString();
                             }
                             else
                             {
                                 excel.Cells[i + , j + ] = dataGridView1[j, i].Value.ToString();
                             }
                         }
                     }
                     sheet.SaveAs(strName, miss, miss, miss, miss, miss, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlNoChange, miss, miss, miss);
                     book.Close(false, miss, miss);
                     books.Close();
                     excel.Quit();
                     System.Runtime.InteropServices.Marshal.ReleaseComObject(sheet);
                     System.Runtime.InteropServices.Marshal.ReleaseComObject(book);
                     System.Runtime.InteropServices.Marshal.ReleaseComObject(books);
                     System.Runtime.InteropServices.Marshal.ReleaseComObject(excel);
                     GC.Collect();
                     MessageBox.Show("数据已经成功导出!", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                     // toolStripProgressBar1.Value = 0;
                     System.Diagnostics.Process.Start(strName);
                 }
             }
             catch (Exception ex)
             {
                 MessageBox.Show(ex.Message, "错误提示");
             }
         }

    public void printAll(System.Data.DataTable dt)
         {
             //导出到execl
             try
             {
                 SaveFileDialog saveFileDialog = new SaveFileDialog();
                 saveFileDialog.Filter = "导出Excel (*.xls)|*.xls";
                 saveFileDialog.FilterIndex = ;
                 saveFileDialog.RestoreDirectory = true;
                 saveFileDialog.CreatePrompt = true;
                 saveFileDialog.Title = "导出文件保存路径";
                 saveFileDialog.ShowDialog();
                 string strName = saveFileDialog.FileName;
                 if (strName.Length != )
                 {
                     //没有数据的话就不往下执行
                     if (dt.Rows.Count == )
                         return;

                     // toolStripProgressBar1.Visible = true;
                     System.Reflection.Missing miss = System.Reflection.Missing.Value;
                     //实例化一个Excel.Application对象
                     Microsoft.Office.Interop.Excel.Application excel = new Microsoft.Office.Interop.Excel.Application();
                     excel.Application.Workbooks.Add(true);
                     excel.Visible = false;//若是true，则在导出的时候会显示EXcel界面。
                     if (excel == null)
                     {
                         MessageBox.Show("EXCEL无法启动！", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
                         return;
                     }
                     Microsoft.Office.Interop.Excel.Workbooks books = (Microsoft.Office.Interop.Excel.Workbooks)excel.Workbooks;
                     Microsoft.Office.Interop.Excel.Workbook book = (Microsoft.Office.Interop.Excel.Workbook)(books.Add(miss));
                     Microsoft.Office.Interop.Excel.Worksheet sheet = (Microsoft.Office.Interop.Excel.Worksheet)book.ActiveSheet;
                     sheet.Name = "test";
                     //生成Excel中列头名称
                     for (int i = ; i < dt.Columns.Count; i++)
                     {
                         excel.Cells[, i + ] = dataGridView1.Columns[i].HeaderText;//输出DataGridView列头名
                     }

                     //把DataGridView当前页的数据保存在Excel中
                     if (dt.Rows.Count > )
                     {
                         for (int i = ; i < dt.Rows.Count; i++)//控制Excel中行，上下的距离，就是可以到Excel最下的行数，比数据长了报错，比数据短了会显示不完
                         {
                             for (int j = ; j < dt.Columns.Count; j++)//控制Excel中列，左右的距离，就是可以到Excel最右的列数，比数据长了报错，比数据短了会显示不完
                             {
                                 string str = dt.Rows[i][j].ToString();
                                 excel.Cells[i + , j + ] = "'" + str;//i控制行，从Excel中第2行开始输出第一行数据，j控制列，从Excel中第1列输出第1列数据，"'" +是以string形式保存，所以遇到数字不会转成16进制
                             }
                         }
                     }
                     sheet.SaveAs(strName, miss, miss, miss, miss, miss, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlNoChange, miss, miss, miss);
                     book.Close(false, miss, miss);
                     books.Close();
                     excel.Quit();
                     System.Runtime.InteropServices.Marshal.ReleaseComObject(sheet);
                     System.Runtime.InteropServices.Marshal.ReleaseComObject(book);
                     System.Runtime.InteropServices.Marshal.ReleaseComObject(books);
                     System.Runtime.InteropServices.Marshal.ReleaseComObject(excel);

                     GC.Collect();
                     MessageBox.Show("数据已经成功导出!", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                     // toolStripProgressBar1.Value = 0;
                     System.Diagnostics.Process.Start(strName);
                 }
             }
             catch (Exception ex)
             {
                 MessageBox.Show(ex.Message, "错误提示");
             }
         }

这两个方法都可以将Oracle导出到Excel中。转自http://www.cnblogs.com/cpcpc/archive/2012/11/13/2767934.html

 class Excel2Oracle
     {
         private static readonly string connectionString = ConfigurationManager.ConnectionStrings["OracleConnection"].ConnectionString;
         public void InsertData2Oracle(DataSet ds)
         {
             using (OleDbConnection oraCon = new OleDbConnection(connectionString))
             {
                 oraCon.Open();
                 using (OleDbCommand cmd = new OleDbCommand())
                 {
                     cmd.Connection = oraCon;
                     cmd.CommandType = CommandType.Text;

                     for (int i = ; i < ds.Tables[].Rows.Count; i++)
                     {
                         List<string> list_ = new List<string>();
                         for (int j = ; j < ds.Tables[].Columns.Count; j++)
                         {
                             list_.Add(ds.Tables[].Rows[i][j].ToString());
                         }
                         string temp = "";
                         string t = ",";

                         for (int k = ; k < list_.Count; k++)
                         {
                             if (k == list_.Count - ) t = "";
                             temp = temp + "'" + list_[k] + "'" + t + "";
                             cmd.CommandText = string.Format("Insert into TBUSER values(" + temp + ")");
                         }

                         cmd.ExecuteNonQuery();
                     }

                 }
                 oraCon.Close();

             }
         }
　　　　}　　

代码比废话更要迷人，我就不多说什么了