C# Prepared Statements - @ sign (at / strudel sign) queries

Question

I Have a problem with a prepared statement in C#:

OdbcCommand cmd = sql.CreateCommand();
cmd.CommandText = \"SELECT UNIQUE_ID FROM userdetails WHERE USER_ID          


        

Answer 1

Use '@USER_ID' instead of '?' and all should work:

OdbcCommand cmd = sql.CreateCommand();
cmd.CommandText = "SELECT UNIQUE_ID FROM userdetails WHERE USER_ID = @USER_ID";
cmd.Parameters.Add("@USER_ID", OdbcType.VarChar, 250).Value = email;