Question

I am new Programmer. In my Comp. I am the Only Programmer. So I have many Questions in my Mind.

In my Project i am using Below Code For add.

MySqlConnection connection = new MySqlConnection(MyConString);
MySqlCommand command = connection.CreateCommand();
MySqlDataReader Reader;
command.CommandText = "select * from " + datatable + " where code='" + textBox1.Text + "'";
connection.Open();
Reader = command.ExecuteReader();
while (Reader.Read())
{
    already = 1;
}
connection.Close();

Is this Correct Way. Or DAL, Stored Procedure, 3 tire Architure Which is most effective. And What standard Code is maintain in Companies.

I am doing Project and Got Solutions Also. But I don’t know this way is Correct or Not.

I think Most of you understand my problem?.

Thanks in Advance….

Answer 1

To ensure that connections are always closed, open the connection inside of a using block. as shown in the following code fragment. Doing so ensures that the connection is automatically closed when the code exits the block.

using (SqlConnection connection = new SqlConnection(connectionString))
    {
        connection.Open();
        // Do work here; connection closed on following line.
    }

This is a part of Connection Pooling. And it is one of the good way of doing Sql connection.