理解DataSet,DataGrid,DataTable之间的联系和差别

public class DatabindExample : System.Web.UI.Page
    {
        protected System.Web.UI.WebControls.DataGrid DataGrid1;
    
        private void Page_Load(object sender, System.EventArgs e)
        {
            if (!Page.IsPostBack)
            {
            
                 DataSet myDS = new DataSet();

                 DataTable dt = new DataTable();
                 DataRow dr;

                 dt.Columns.Add(new DataColumn("列号", typeof(Int32)));
                 dt.Columns.Add(new DataColumn("项目", typeof(string)));
                 dt.Columns.Add(new DataColumn("日期", typeof(DateTime)));
                 dt.Columns.Add(new DataColumn("布尔值", typeof(bool)));

                for (int i = 1; i <= 9; i++)
                {
                
                     dr = dt.NewRow();

                     dr[0] = i;
                     dr[1] = "Item " + i.ToString();
                     dr[2] = DateTime.Now;
                     dr[3] = (i % 2 != 0) ? true : false;

                     dt.Rows.Add(dr);
                 }
           
                 myDS.Tables.Add(dt);

                 DataGrid1.DataSource =myDS;
                 DataGrid1.DataBind();
             }
         }

        Web 窗体设计器生成的代码#region Web 窗体设计器生成的代码
        override protected void OnInit(EventArgs e)
        {
            //
            // CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
            //
             InitializeComponent();
            base.OnInit(e);
         }
        
        /**//// <summary>
        /// 设计器支持所需的方法 - 不要使用代码编辑器修改
        /// 此方法的内容。
        /// </summary>
        private void InitializeComponent()
        {    
            this.Load += new System.EventHandler(this.Page_Load);

         }
        #endregion
     }