简单缓存 datatable

            DataTable dt = new DataTable();

            if (Cache["mytablecache"] == null)
            {
                using (SqlConnection con = new SqlConnection("Data Source=.;Initial Catalog=LocalDB;Integrated Security=True"))
                {
                    con.Open();
                    SqlDataAdapter adapter = new SqlDataAdapter("SELECT top 100 * FROM [Money_CostDetail]", con);
                    adapter.Fill(dt);
                }
                Cache.Insert("mytablecache", dt, null, DateTime.UtcNow.AddMinutes(1), TimeSpan.Zero);
            }
            else
            {
                dt = Cache["mytablecache"] as DataTable;
            }