从C＃中返回的对象访问属性

Question

Good Day. I am struggling with what I would assume would be a novice issue, I have an object being returned from a method in my data layer, but I want to be able to access say

RuleListCollection.ruleName

but I have the whole object sent back to me in the list, how can i access the attribute above. here is the code from the data layer where the object is returned

        public List<TpRuleMapConfig>  GetTpRuleList()
    {
        StringBuilder query = new StringBuilder();
        TpRuleMapConfig tpRuleMapConfig = new TpRuleMapConfig();
        List<TpRuleMapConfig> tpRuleList = new List<TpRuleMapConfig>();


        try
        {
            query.AppendLine("SELECT maestro.TPRuleMapConfig.LINK,maestro.TPRuleMapConfig.TPRULENAME,maestro.TPRuleMapConfig.SBSARULENAME,");
            query.AppendLine(" maestro.COUNTINGCONFIG.RULETYPE,maestro.TPRuleMapConfig.ISPREADVRULE FROM maestro.TPRuleMapConfig");
            query.AppendLine("INNER JOIN maestro.COUNTINGCONFIG on maestro.COUNTINGCONFIG.NAME=TPRuleMapConfig.SBSARULENAME;");

            using (SqlConnection con = new SqlConnection(this._connectionString))
            {
                using (SqlCommand cmd = new SqlCommand(query.ToString()))
                {
                    con.Open();
                    cmd.Connection = con;
                    cmd.CommandType = CommandType.Text;

                    using (SqlDataReader reader = cmd.ExecuteReader())
                    {
                        while (reader.Read())
                        {
                            tpRuleMapConfig.Link = reader["LINK"].ToString();
                            tpRuleMapConfig.TpRuleName = reader["TPRULENAME"].ToString();
                            tpRuleMapConfig.SbsaRuleName = reader["SBSARULENAME"].ToString();
                            tpRuleMapConfig.RuleType = Convert.ToInt32(reader["RULETYPE"]);
                            tpRuleMapConfig.IsPreadVised = reader["ISPREADVRULE"].GetBooleanValue();

                            tpRuleList.Add((tpRuleMapConfig));
                        }
                    }

                }
            }
        }
        catch (Exception)
        {

            throw;
        }

        return tpRuleList;
    }

and here is where I want to access that value

        DataLayer datalayer = new DataLayer(this._connectionString);
        cmbRuleType.DataSource = datalayer.GetTpRuleList().TpRuleName;

Answer 1

Your method returns a List of objects not a single object. You can iterate over the list and read the RuleName of each object in the list.

var tpRuleList = datalayer.GetTpRuleList();
foreach (var tpRule in tpRuleList)
{
    var tpRuleName = tpRule.TpRuleName;
    // Do something with tpRuleName.
}