Powershell and SQL parameters. If empty string, pass DBNull

Question

I got this parameter:

$objDbCmd.Parameters.Add(\"@telephone\", [System.Data.SqlDbType]::VarChar, 18) | Out-Null;
$objDbCmd.Parameters[\"@telephone\"].Value =         


        

Answer 1

Always append +"" at the end of db values...

$command.Parameters["@EmployeeType"].Value= $ADResult.EmployeeType + ""