c# - 更新记录时，ExecuteNonQuery() 在 Update 中返回 -1

Question

我已经验证我的方法/Oracle 程序工作正常，但在我的 C# 中，我总是从 ExecuteNonQuery() 返回 -1。因此，下面的 bool 总是错误的。我们只在 DB (Oracle) 中使用触发器来执行 INSERT 语句。我需要触发器来更新语句吗？

任何建议为什么会发生？它肯定更新了一个记录:

public bool ChangePassword(long UserId, string NewPassword)
    {
        int rcds = 0;
        using (OracleConnection dbConn = new OracleConnection(dbConnString))
        using (OracleCommand dbCmd = new OracleCommand("PKG_USER.CHANGE_PASSWORD", dbConn))
        {
            try
            {
                string salt = GenerateSalt();
                dbCmd.CommandType = CommandType.StoredProcedure;
                dbCmd.Parameters.Add("p_USER_ID", OracleDbType.Int64, UserId, ParameterDirection.Input);
                dbCmd.Parameters.Add("P_PASSWORD", OracleDbType.Varchar2, 128, EncodePassword(NewPassword, this.IsPasswordHashed, salt), ParameterDirection.Input);
                dbCmd.Parameters.Add("P_PASSWORD_SALT", OracleDbType.Varchar2, 128, salt, ParameterDirection.Input);

                if (dbConn.State != ConnectionState.Open) dbConn.Open();
                rcds = dbCmd.ExecuteNonQuery();
            }
            catch (Exception e)
            {
                LastError = e.Message + " " + e.Source;
                rcds = 0;
            }
            finally
            {
                dbCmd.Dispose();
                dbConn.Dispose();
            }
        }
        return (rcds > 0);
    }

抱歉...这是 SP:

PROCEDURE Change_Password(p_User_Id       IN Users.User_Id%TYPE,
                          p_Password      IN Users.Password%TYPE,
                          p_Password_Salt IN Users.Password_Salt%TYPE) IS


BEGIN
UPDATE Users
   SET Password             = p_Password,
       Password_Salt        = p_Password_Salt,
       Password_Change_Date = SYSDATE
 WHERE User_Id = p_User_Id;

 END Change_Password;

Answer 1

尝试显式返回 SQL%ROWCOUNT。

根据 MSDN，DbCommand..ExecuteNonQuery 将始终为存储过程调用返回 -1:

For UPDATE, INSERT, and DELETE statements, the return value is the number of rows affected by the command. For all other types of statements, the return value is -1.

如果我从使用大量存储过程的日子里没记错的话，我相信您需要使用输出参数来返回诸如更新行数之类的东西。