databoundtemplate.cs

asp.net技术内幕的书配源码

using System;
using System.Web;
using System.Web.UI;
using System.Collections;

namespace myControls {

	[ParseChildren(true)]
	public class DataBoundTemplate : Control {

		private IEnumerable _dataSource;
		private ITemplate _itemTemplate;

		public IEnumerable DataSource {
			get {
				return _dataSource;
			}
			set {
				_dataSource = value;
			}
		}

		protected override void OnDataBinding(EventArgs e) {
			IEnumerator objDataEnum;
			DataBoundTemplateItem objItem;

			if (DataSource != null) {
				Controls.Clear();
				objDataEnum = DataSource.GetEnumerator();
				while ( objDataEnum.MoveNext() ) {
					objItem = new DataBoundTemplateItem( objDataEnum.Current );
					ItemTemplate.InstantiateIn( objItem );
					Controls.Add( objItem );
				}
			}
		}

		[TemplateContainer(typeof(DataBoundTemplateItem))]
		public ITemplate ItemTemplate {
			get {
				return _itemTemplate;
			}
			set {
				_itemTemplate = value;
			}
		}
	}

	public class DataBoundTemplateItem : Control, INamingContainer {

		private object _dataItem;

		public DataBoundTemplateItem( object DataItem ) : base() {
			_dataItem = DataItem;
		}

		public object DataItem {
			get {
				return _dataItem;
			}
		}
	}
}