如何在c#中的控制台中显示数据库值

Question

How to display the unitfunction value from mysql database and my query is below ,i don't know its right or wrong. Help me out.

 string fundev = "select unitfunctioncode from channels where channel_no = " + Channelid;
                    MySqlCommand getfun = new MySqlCommand(fundev, Connection1);
                    Console.WriteLine(getfun);

Answer 1

MAKE ENTITY CONTEXT FIRST: YourEntity db= new YourEntity(); LINQ:

Console.Write(db.channels.Where(x=>x.channel_no == Channelid).Select(y=>y.unitfunctioncode));

This is modal first approach create modal from database and call this linq in controller

Answer 2

I'm not sure about the specifics of MySqlCommand, but I would expect to see an execute on your getfun object.

I would do something like this:

MySqlDataReader rdr = getfun.ExecuteReader();
while (rdr.Read())
{
    Console.WriteLine(rdr[0]);
}
rdr.Close(); 

This takes into account multiple rows returned. You can omit the while loop if you're sure you will have a single row returned.