How to get the dbms.output value returned by a PL-SQL block in C#

问题

I am trying to execute a PL-SQL block in c# using System.Data.OrcaleClient. The PL-SQL block when executed in oracle, prints the result using dbms.ouput.

I want to get that "dbms.ouput" result in my C# code.

Please help.

回答1:

Try to use get_line function of dbms_output package. You can create a procedure to return the output. Something like this (just a example):

procedure call_with_output(p_output out varchar2) is
  vret integer := 0;
  vtxt varchar2(4000);
begin
  dbms_output.enable;
  -- here call code that generate lines
  -- use the loop to retrieve info
  while vret = 0 loop
    dbms_output.get_line(vtxt, vret);
    if vret = 0 then
      if p_output  is null then
        p_output := vtxt;
      else
       p_output := p_output || chr(10) || vtxt;
      end if;
    end if;
  end loop;
  dbms_output.disable;
end;

回答2:

I am using the next method:

    private string GetDbmsOutputLine()
    {
        OracleCommand command = new OracleCommand
        {
            Connection = <connection>,
            CommandText = "begin dbms_output.get_line(:line, :status); end;",
            CommandType = CommandType.Text
        };

        OracleParameter lineParameter = new OracleParameter("line",  
            OracleType.VarChar);
        lineParameter.Size = 32000;
        lineParameter.Direction = ParameterDirection.Output;
        command.Parameters.Add(lineParameter);

        OracleParameter statusParameter = new OracleParameter("status",  
            OracleType.Int32);
        statusParameter.Direction = ParameterDirection.Output;
        command.Parameters.Add(statusParameter);

        command.ExecuteNonQuery();

        if (command.Parameters["line"].Value is DBNull)
            return null;

        string line = command.Parameters["line"].Value as string;

        return line;
    }

Call it several times to get multistring value because there are problems with calling dbms_output.get_lines with System.Data.OracleClient.

来源：https://stackoverflow.com/questions/9545389/how-to-get-the-dbms-output-value-returned-by-a-pl-sql-block-in-c-sharp

标签

Oracle

plsql

database

dbms-output