Question

I’m working with MySql in C# language.
I’m trying get some data out of my database.
The fields are organized like:

foo baa 
38737 22222 

I need to get value of foo if my hash is equal to baa
I tried this:
My code(not working)

 MySqlConnection con = new MySqlConnection("Server=localhost;Database=test;Uid=user;Pwd=pass;");
 con.Open();
 MySqlCommand cmd = new MySqlCommand();
 cmd.CommandText = string.Format("SELECT * FROM info WHERE baa = '{0}'", Hash); ;
 cmd.Connection = con;
 MySqlDataReader reader = cmd.ExecuteReader();
String res = reader.GetString(0); 

I’m getting the following error:

Invalid attempt to access a field before calling Read() 

Can someone point out my error?
Thanks in advance.

Answer 1

You are missing a reader.Read() call:

 MySqlDataReader reader = cmd.ExecuteReader();
 while(reader.Read())
 {
     String res = reader.GetString(0); 
     //...
 }