winform之excel导入和导出

引用命名空间   using Microsoft.Office.Interop.Excel;
DataGridView 导出到Excel

  public static void SaveAs(DataGridView gridView)
         {
             //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;
                 )
                 {
                   toolStripProgressBar1.Visible = true;
                     System.Reflection.Missing miss = System.Reflection.Missing.Value;
                     Microsoft.Office.Interop.Excel.ApplicationClass excel = new Microsoft.Office.Interop.Excel.ApplicationClass();
                     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";

                     , n = ;
                     //生成列名称   这里i是从1开始的 因为我第0列是个隐藏列ID  没必要写进去
                     ; i < gridView.ColumnCount; i++)
                     {

                         excel.Cells[, i] = gridView.Columns[i].HeaderText.ToString();

                     }

                     //填充数据
                     ; i < gridView.RowCount; i++)
                     { 

                         //j也是从1开始  原因如上  每个人需求不一样
                         ; j < gridView.ColumnCount; j++)
                         {

                                 if (gridView[j, i].Value.GetType() == typeof(string))
                                 {
                                     &&j==)
                                     {
                                         "+gridView[j, i].Value.ToString().Trim();
                                         excel.Cells[i + , j] = "'" +s;
                                         continue;
                                     }
                                            excel.Cells[i + , j] = "'" + gridView[j, i].Value.ToString();               

                                 }
                                 else
                                 {
                                     excel.Cells[i + , j ] = gridView[j, i].Value.ToString();
                                 }

                         }
                         toolStripProgressBar1.Value +=  / gridView.RowCount;
                     }

                     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 = ;

                     System.Diagnostics.Process.Start(strName);
                 }
             }

             catch (Exception ex)
             {
                 MessageBox.Show(ex.Message, "错误提示");
             }

         }

//获得当前你选择的Excel Sheet的所有名字

 public static string[] GetExcelSheetNames(string filePath)
         {

             Excel.ApplicationClass excelApp = new Excel.ApplicationClass();
             Excel.Workbooks wbs = excelApp.Workbooks;
             Excel.Workbook wb = wbs.Open(filePath, Type.Missing, Type.Missing, Type.Missing, Type.Missing,
             Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing,
             Type.Missing, Type.Missing, Type.Missing, Type.Missing);
             int count=wb.Worksheets.Count;
             string[]names=new string[count];
             ; i <= count; i++)
             {
                 names[i-]=((Excel.Worksheet)wb.Worksheets[i]).Name;
             }
             return names;
         }

Excel导入到数据库Access中，示例如下：

     //filePath  你的Excel文件路径
    public static bool Import(string filePath)
         {
             try
             {
                     //Excel就好比一个数据源一般使用

                 string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;" + "Data Source=" + filePath + ";" + "Extended Properties=Excel 8.0;";

                 OleDbConnection con = new OleDbConnection(strConn);
                 con.Open();
                 string[] names = GetExcelSheetNames(filePath);
                 )
                 {
                     foreach (string name in names)
                     {
                         OleDbCommand cmd = con.CreateCommand();
                         cmd.CommandText = string.Format(" select * from [{0}$]", name) ;//[sheetName$]要如此格式
                         OleDbDataReader odr = cmd.ExecuteReader();

                         while (odr.Read())
                         {

                             ].ToString()== "序号")//过滤列头  按你的实际Excel文件
                                 continue;
                             Add(odr[].ToString(), odr[].ToString(), odr[].ToString());//数据库添加操作

                         }
                         odr.Close();
                     }
                 }
                 return true;
             }
             catch (Exception)
             {
                 return false;
             }

         }