public List <string> ValaszLekerdez()
{
KerdesRaktar kr = KerdesRaktar.getInstance();
List <string> valaszok = new List <string>();
string connectionString = "Driver={Microsoft Excel Driver (*.xls, *.xlsx, *.xlsm, *.xlsb)};" + "DBQ=" + Environment.CurrentDirectory + @"\Fajlok\DB\kerdesadatbazis.xlsx" + ";ReadOnly=0;";
string queryString =
"SELECT * FROM [Valaszok$]";
using (OdbcConnection connection =
new OdbcConnection(connectionString))
{
OdbcCommand command = new OdbcCommand(queryString, connection);
try
{
connection.Open();
OdbcDataReader reader = command.ExecuteReader();
while (reader.Read())
{
valaszok.Add((string)reader[0]);
}
reader.Close();
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
return(valaszok);
}
}
public static KerdesRaktar getInstance()
{
if (uniqueInstance == null)
{
uniqueInstance = new KerdesRaktar();
}
return(uniqueInstance);
}