C# 读取Execl和Access数据库

第一次写，请大家指教！！话不多说 直接走代码！

         /// <summary>
         /// 打开文件
         /// </summary>
         /// <param name="sender"></param>
         /// <param name="e"></param>
         private void btn_file_Click(object sender, EventArgs e)
         {
             OpenFileDialog openFile = new OpenFileDialog();
             openFile.Filter = "Execl(*.xls)|*.xls|accdb(*.accdb)|*.accdb";
             if (openFile.ShowDialog() == DialogResult.OK) {
                 SelectInfo(openFile.FileName);
             }
         }

 /// <summary>
         /// 读取数据
         /// </summary>
         /// <param name="path"></param>
         public void SelectInfo(string path) {
             string Suffix = Path.GetExtension(path);
             //string tabName = "Student";
             string tabName = "";  //查询的表名 建议在窗体上面 加一个textbox控件
             if (tabName.Equals(""))
             {
                 tabName += "[sheet1$]";
             }
             string strConn = string.Empty;
             //path = Environment.CurrentDirectory;
             switch (Suffix)
             {
                 case ".xls":
                     strConn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + path + ";Extended Properties='Excel 8.0;HDR=No;IMEX=1;'";
                     //tabName += "$";
                     break;
                 case ".xlsx":
                     strConn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + path + ";Extended Properties='Excel 8.0;HDR=False;IMEX=1'";
                    // tabName += "$";
                     break;
                 case ".mdb":
                     strConn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + path;
                     break;
                 case ".accdb"://Access2007
                     strConn = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source="+path;
                     break;
                 default:
                     break;
             }
             OleDbConnection oledbConn = new OleDbConnection(strConn);
             try
             {
              //   oledbConn.Open();
                 string sql = "Select * from " + tabName;
                 OleDbDataAdapter oledbDa = new OleDbDataAdapter(sql, oledbConn);
                 DataSet ds = new DataSet();
                 oledbDa.Fill(ds,"信息");
                 this.dgv_Info.DataSource = ds.Tables["信息"];
             }
             catch (Exception)
             {

                 throw;
             }
             finally {
                 oledbConn.Close();
             }
         }

运行效果：

适合初学者。第一次写，大神不要吐槽呀。。。。