if (openFileDialog1.ShowDialog() == DialogResult.OK)
            {

                Filename = openFileDialog1.FileName;

                string strCon = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Filename + ";Extended Properties=‘Excel 8.0;IMEX=1‘";
                System.Data.OleDb.OleDbConnection Conn = new System.Data.OleDb.OleDbConnection(strCon);
                string strCom = "SELECT * FROM [Sheet1$]";
                Conn.Open();
                System.Data.OleDb.OleDbDataAdapter myCommand = new System.Data.OleDb.OleDbDataAdapter(strCom, Conn);
                DataSet ds = new DataSet();
                myCommand.Fill(ds, "[Sheet1$]");
                temp.DataSource = ds.Tables[0];
                Conn.Close();
               
            }