C#Winform版获取Excel文件的内容

 public MainForm()
         {
             InitializeComponent();
             //this.ofd_in.DefaultExt = ".xlsx";
             this.ofd_in.Filter = "Excel文件(*.xlsx)|*.xlsx";
         }
         // code.GetSheetName getname = new code.GetSheetName();
         private void btnDr_Click(object sender, EventArgs e)
         {
             if (ofd_in.ShowDialog() == System.Windows.Forms.DialogResult.OK)
             {
                 this.txtFileName.Text = ofd_in.FileName.ToString();
                 List<Model.ExcelSheet> lst = code.GetSheetName.ExcelSheetName(ofd_in.FileName.ToString());
                 cmbBox.DataSource = lst;
                 cmbBox.DisplayMember = "SheetName";
                 cmbBox.ValueMember = "Id";

                 //ImportExcel(ofd_in.FileName, "[Sheet1$]");//传递excel文件名，和表名
             }
         }

         /// <summary>
         /// 从选择的excel导入
         /// </summary>
         /// <returns></returns>
         public void ImportExcel(string ExcelName, string Tablename)
         {
             // string strcon = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + ExcelName + ";Extended Properties='Excel 8.0;HDR=No;IMEX=1';";//连接excel文件的字符串

             string strcon = "Provider=Microsoft.Ace.OleDb.12.0;data source=" + ExcelName + ";Extended Properties='Excel 12.0; HDR=Yes; IMEX=1'"; //此连接可以操作.xls与.xlsx文件 (支持Excel2003 和 Excel2007 的连接字符串)
             if (ExcelName == null)
             {
                 return;
             }
             OleDbConnection odcon = new OleDbConnection(strcon);//建立连接
             odcon.Open();//打开连接

             //把数据集dataset放到控件中显示
             OleDbDataAdapter odda = new OleDbDataAdapter("select * from " + Tablename, odcon);
             DataSet ds = new DataSet();
             try
             {
                 odda.Fill(ds);
             }
             catch (Exception ex)
             {
                 MessageBox.Show(ex.Message);
             }
             if (ds != null)
             {

                 this.dgvdata.DataSource = ds.Tables[];

             }
             else
             {
                 MessageBox.Show("没有数据");
             }
         }

         private void btnClose_Click(object sender, EventArgs e)
         {
             this.Close();
         }

         /// <summary>
         /// 保存，选中的datagridview的值
         /// </summary>
         /// <param name="sender"></param>
         /// <param name="e"></param>
         private void btnSave_Click(object sender, EventArgs e)
         {
             int selectedCellCount = dgvdata.GetCellCount(DataGridViewElementStates.Selected);
             if (selectedCellCount > )
             {
                 if (dgvdata.AreAllCellsSelected(true))
                 {
                     MessageBox.Show("All cells are selected", "Selected Cells");
                 }
                 else
                 {
                     StringBuilder sb = new StringBuilder();

                     for (int i = ;
                         i < selectedCellCount; i++)
                     {
                         sb.Append("Row: ");
                         int rows = dgvdata.SelectedCells[i].RowIndex;
                         sb.Append(rows.ToString());
                         sb.Append(", Column: ");
                         int columns = dgvdata.SelectedCells[i].ColumnIndex;
                         sb.Append(columns.ToString());
                         sb.Append(",Value: ");
                         sb.Append(dgvdata.Rows[rows].Cells[columns].Value.ToString());
                         sb.Append(Environment.NewLine);
                     }

                     sb.Append("Total: " + selectedCellCount.ToString());
                     MessageBox.Show(sb.ToString(), "Selected Cells");
                 }
             }
         }

         /// <summary>
         /// 加载对应的sheet页
         /// </summary>
         /// <param name="sender"></param>
         /// <param name="e"></param>
         private void btnSearch_Click(object sender, EventArgs e)
         {
             dgvdata.DataSource = null;
             var sheetname = this.cmbBox.Text.Trim(); ;
             ImportExcel(this.txtFileName.Text, "["+sheetname+"]");
         }