Tim Van Wassenhove

Passionate geek, interested in Technology. Proud father of two

21 Nov 2009

Easy pattern for Control state

If you have decided that your WebControl requires to maintain it’s state you will want to figure out how to implement Control state. Most examples on the web will then create an array of objects and then hardcode the indices to find stuff back… Simply define a serializable inner class and use that instead of the ‘magic array object’. Eg

class SilverlightHost : WebControl
	class State
		public object BaseState { get; set; }
		public string SilverlightUrl { get; set; }
		public string SilverlightErrorHandlerUrl { get; set; }
		public Dictionary<string, string> Parameters { get; set; }

	protected override void OnInit(EventArgs e)

	protected override object SaveControlState()
		var state = new State
			BaseState = base.SaveControlState(),
			SilverlightUrl = SilverlightUrl,
			SilverlightErrorHandlerUrl = SilverlightErrorHandlerUrl,
			Parameters = parameters
		return state;

	protected override void LoadControlState(object savedState)
		var state = (State)savedState;
		SilverlightUrl = state.SilverlightUrl;
		SilverlightErrorHandlerUrl = state.SilverlightErrorHandlerUrl;
		parameters = state.Parameters;