数据库连接 基本操作

private string strConn = "Data Source=WWW-ABB9DE1DEF5;Initial Catalog=MG_Admin;Persist Security Info=True;User ID=sa;Password=229524";

SqlConnection Conn;

SqlCommand myCommand;

private void ConnectionDB()

{

if (Conn == null)

Conn = new SqlConnection(strConn);

if (Conn.State == ConnectionState.Closed)

Conn.Open();

}

private void CloseConnection()

{

Conn.Close();

}