Connection String

MyConnection = New OleDb.OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" +
                                                         ofd.FileName + ";Extended Properties=Excel 12.0;")
                MyCommand = New OleDb.OleDbDataAdapter("select * from [Sheet1$]", MyConnection)
                MyConnection.Open()
                dataSet = New DataSet
                MyCommand.Fill(dataSet)
                dt_data.DataSource = dataSet.Tables(0)

                MyConnection.Close()