Building a Better ASP.NET 1.1 BasePage Framework

using System;
using System.Web;
using System.Reflection;

namespace BasePageFramework.SmartState
{
	/// <summary>
	/// Summary description for SmartApplicationBase.
	/// </summary>
	public class SmartApplicationBase : ISmartApplication
	{

		[field: NonSerialized()]
		private HttpApplicationState _appState = null;

		#region ISmartApplication Members

		public void FlushAppState()
		{
			CheckInit();
			_appState.Clear();
		}

		public void PersistToAppState()
		{
			CheckInit();
			
			_appState.Lock();
			
			//update the derived smartapplication object to the application state...
			foreach(PropertyInfo inf in this.GetType().GetProperties())
				this._appState[inf.Name] = inf.GetValue(this,null);
			
			_appState.UnLock();
		}

		public void SetApplicationState(System.Web.HttpApplicationState state)
		{
			_appState = state;
			//extract the values out of application state so our smart application object 
			//has everything it needs to be referenced in the page
			_appState.Lock();
			
			foreach(PropertyInfo inf in this.GetType().GetProperties())
				inf.SetValue(this,this._appState[inf.Name],null);
			
			_appState.UnLock();
		}

		private void CheckInit()
		{
			if(_appState == null)
				throw new InvalidOperationException("The SmartApplicationState must be initialized before it is accessed");
		}

		#endregion
	}
}