如何将对象转换为列表<String>

Question

I don't know how to convert object() to List<string> and I am getting errors.

This works but I keep on getting the return List<string> as null :

     public List<string> DspStrg()
     {
        List<string> dspString = new List<string>();

        conn(); //opens connection to database
        StringBuilder dspStrgQuery = new StringBuilder();
        dspStrgQuery.Append("Select String From DisplayToJ");

        OdbcCommand commDspQuery = new OdbcCommand(displayStringQuery.ToString(), oConnection);
        OdbcDataReader RDisplay = commDspQuery.ExecuteReader();

        string[] d ;
        Object doh = new object();
        while(RDisplay.Read() )
        {
            try
            {
                doh = RDisplay[0];
               //-----------
               // convert object to List<string> here

            }
            catch(OdbcException ex)
            {
                MessageBox.Show(ex.Message);
            }
        }

        RDisplay.Close();
        return dspString;

     }

Answer 1

You don't need to convert anything, just add each item to the collection

List<string> dspString = new List<string>();
...
while(RDisplay.Read())
{
    try
    {
        dspString.Add(RDisplay.GetString(0));
    }
    catch(OdbcException ex)
    {
        MessageBox.Show(ex.Message);
    }
}