Question

How can I get the result of a SQL query calculation?

Say, there are two cases”

CASE 1
 RETURN "Process ok"
CASE 2
 RETURN "Process failed"

This will be returned from the stored procedure.

Which is the best way to read this on .net, C# (Windows Forms)?

Answer 1

it’s up to you to use DataReader if you think you can get multiple records, or an ExecuteScalar if you only get a single value, no records and no multiple columns, simply a string or an int…

here how to call a stored procedure and get a reader then read its first column:

using(var  conn = new OracleConnection("Data Source=oracledb;User Id=UserID;Password=Password;"))
{
    OracleCommand cmd = new OracleCommand();
    cmd.Connection = conn;
    cmd.CommandText = "storedProcedurename";
    cmd.CommandType = CommandType.StoredProcedure;

    cmd.Parameters.Add(...);

    conn.Open();
    OracleDataReader dr = cmd.ExecuteReader();

    while(dr.Read())
    {
        var yourResult = dr[0].ToString();
    }
}