Asp.net Queries

Solution to error - String was not recognized as a valid DateTime.                                                       or  Conversion from string "29/04/2020" to type 'Date' is not valid Save date in SQL DB Dim requestdate As String             requestdate = DateTime.ParseExact(txtfrom.Text, "dd/MM/yyyy", Nothing).ToString("yyyy/MM/dd") comm.Parameters.AddWithValue("@req_date", requestdate)