Re: CompositeControl not saving child controls viewstate

Slipperman — Fri, 26 Jun 2009 10:23:20 GMT

1. have you checked the value of _menuOptionList in debug to make sure it's not null?

2. if it is, try placing the value of _menuOptionList in the ViewState collection within the property then refer to it via the property name (MenuOptions) in CreateChildControls. also try commenting out EnsureChildControls for now.

3. you're switching on menuOption.SelectionType for 2 possible values. but where is this actually set to one or the other? there's no reference to it.

Re: CompositeControl not saving child controls viewstate

bhav27 — Fri, 26 Jun 2009 05:44:48 GMT

Slipperman:

you might want to repost your problem description (hard to read). no need to put it in a code segment - just use the regular textbox.

When I tried to insert problem text at the top of code the richtextbox here takes my text as code so I had to put it at the end.

Re: CompositeControl not saving child controls viewstate

Slipperman — Thu, 25 Jun 2009 11:03:15 GMT

you might want to repost your problem description (hard to read). no need to put it in a code segment - just use the regular textbox.

CompositeControl not saving child controls viewstate

bhav27 — Thu, 25 Jun 2009 06:01:24 GMT

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

using eBizTakeAway.WebStore.Catalogue;
using eBizSuite.Common.Shared;

namespace eBizTakeAway.Web.UI.ServerControls
{
	[ToolboxData("<{0}:MenuOptionsConfig runat=server></{0}:MenuOptionsConfig>")]
	public class MenuOptionsConfig : CompositeControl
	{
		#region private members

		protected MenuOptionCollection _menuOptionList;
		protected CatalogMenuOptionCollection _catalogMenuOptionList;

		#endregion

		#region private methods

		protected void CreateSingleSelectionControl(MenuOptions menuOption, bool bDataBind)
		{
			CheckBoxList chkList = new CheckBoxList();
			Controls.Add(chkList);

			if (bDataBind)
			{
				chkList.ID = menuOption.OptionName.Replace(" ", "");
				chkList.RepeatDirection = RepeatDirection.Horizontal;
				chkList.RepeatColumns = 3;

				chkList.DataSource = menuOption.Options;
				chkList.DataTextField = "Name";
				chkList.DataValueField = "Name";
				chkList.DataBind();
			}
		}

		protected void CreateMultiSelectionControl(MenuOptions menuOption, bool bDataBind)
		{
			RadioButtonList rblList = new RadioButtonList();
			Controls.Add(rblList);

			if (bDataBind)
			{
				rblList.ID = menuOption.OptionName.Replace(" ", "");
				rblList.RepeatDirection = RepeatDirection.Horizontal;
				rblList.RepeatColumns = 3;

				rblList.DataSource = menuOption.Options;
				rblList.DataTextField = "Name";
				rblList.DataValueField = "Name";
				rblList.DataBind();
			}
		}

		#endregion

		#region public properties

		public MenuOptionCollection MenuOptions
		{
			set
			{
				_menuOptionList = value;

				EnsureChildControls();
			}
		}

		public CatalogMenuOptionCollection CatalogMenuOptions
		{
			get
			{
				return _catalogMenuOptionList;
			}
		}

		#endregion

		#region overridable members

		protected override void CreateChildControls()
		{
			try
			{
				if (_menuOptionList != null)
				{
					_menuOptionList.GetCollection().ForEach(menuOption =>
						{
							LiteralControl header = new LiteralControl(string.Format("<h2>{0}</h2>", menuOption.OptionName));

							LiteralControl desc = new LiteralControl();
							if (menuOption.Description != string.Empty)
								desc = new LiteralControl(string.Format("<h3>{0}</h3>", menuOption.Description));

							Controls.Add(header);
							Controls.Add(desc);

							switch (menuOption.SelectionType)
							{
								case MenuOptionSelectionType.Single:
									CreateSingleSelectionControl(menuOption, !Page.IsPostBack);
									break;
								case MenuOptionSelectionType.Multiple:
									CreateMultiSelectionControl(menuOption, !Page.IsPostBack);
									break;
							}
						});
				}
			}
			catch (Exception ex)
			{
				throw ex;
			}
			finally
			{
				base.CreateChildControls();
			}
		}

		#endregion

		#region public methods

		#endregion

		#region event handlers

		#endregion
	}
}

Above is the code I am currently using to develop my custom server control. Basically based on "MenuOptions" property which user sets the control builds by Child controls. The big problem here I have is when user postbacks the control fails to render the child controls. I tried to debug and found out that in the first postback the debugger directly goes to CreateChildControls() rather page_load() of the page.

On the second postback the debugger behaves normally but never renders checkboxlist and radiobuttonlist in the child controls but just literalcontrols.

Can someone review the code and let me know what I am doing wrong or missing here?

Custom Server Controls

Re: CompositeControl not saving child controls viewstate

Re: CompositeControl not saving child controls viewstate

Re: CompositeControl not saving child controls viewstate

CompositeControl not saving child controls viewstate