groupitem.cs

ASP中web自定义控件的使用源码及说明文档

using System;
using System.ComponentModel;
using System.Web.UI;

namespace Bestcomy.Web.UI.WebControls
{
	/// <summary>
	/// 
	/// </summary>
	[ParseChildren(true,"Items"),PersistChildren(false)]
	public class GroupItem : IStateManager
	{
		private string _text = string.Empty;
		private GroupListItemCollection _items = new GroupListItemCollection();
		private bool _IsTrackingViewState = false;

		public GroupItem() : this(string.Empty)
		{
		}

		public GroupItem(string text)
		{
			_text = text;
		}

		public string Label
		{
			get
			{
				return _text;
			}
			set
			{
				_text = value;
			}
		}

		[DesignerSerializationVisibility(DesignerSerializationVisibility.Content), Editor(typeof(System.ComponentModel.Design.CollectionEditor), typeof(System.Drawing.Design.UITypeEditor)), PersistenceMode(PersistenceMode.InnerDefaultProperty), MergableProperty(false)]
		public GroupListItemCollection Items
		{
			get
			{
				return this._items;
			}
		}

		#region IStateManager 成员

		void IStateManager.TrackViewState()
		{
			_IsTrackingViewState = false;
			((IStateManager)this.Items).TrackViewState();
		}

		[Browsable(false)]
		bool IStateManager.IsTrackingViewState
		{
			get
			{
				return _IsTrackingViewState;
			}
		}

		object IStateManager.SaveViewState()
		{
			return new Pair(this.Label, ((IStateManager)this.Items).SaveViewState());
		}

		void IStateManager.LoadViewState(object state)
		{
			if(state!=null && state is Pair)
			{
				this.Label = (string)((Pair)state).First;
				((IStateManager)this.Items).LoadViewState(((Pair)state).Second);
			}
		}

		#endregion
	}
}