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POWhy custom control task pane does not update its properties?
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  1. POWhy custom control task pane does not update its properties?
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    copied!<p>I have designed a custom panel which can expand or collapse form at run time. <img src="https://i.stack.imgur.com/UmHO4.png" alt="enter image description here"></p> <p>When I change its height from custom designed task, it does not update it. <img src="https://i.stack.imgur.com/SPXiV.png" alt="enter image description here"></p> <p>Code of my control class:</p> <pre><code>using System; using System.Windows.Forms; using System.ComponentModel; using System.ComponentModel.Design; using System.Windows.Forms.Design; [Designer(typeof(MyControlDesigner))] public partial class ExpandCollapsePanel : UserControl { private bool flag = false; private Size size; public int usrVerticalSize; public ExpandCollapsePanel() { InitializeComponent(); } [DefaultValueAttribute(true)] public int SetVerticalSize { get { return usrVerticalSize; } set { usrVerticalSize = value; } } </code></pre> <p>Code of taskpanedesign class:</p> <pre><code>namespace ExpandCollapseFormLibrary { class CustomDialogue : ControlDesigner { private DesignerActionListCollection actionLists; public override DesignerActionListCollection ActionLists { get { if (actionLists == null) { actionLists = new DesignerActionListCollection(); actionLists.Add(new MyActionListItem(this)); } return actionLists; } } } internal class MyActionListItem : DesignerActionList { public MyActionListItem(ControlDesigner owner) : base(owner.Component) { } public override DesignerActionItemCollection GetSortedActionItems() { var items = new DesignerActionItemCollection(); //items.Add(new DesignerActionTextItem("Hello world", "Misc")); items.Add(new DesignerActionPropertyItem("Checked", "Vertical Drop Down Size")); return items; } public int Checked { get { return ((ExpandCollapsePanel)base.Component).SetVerticalSize; } set { ((ExpandCollapsePanel)base.Component).SetVerticalSize = value; } } } } </code></pre> <p>When I change the value the Form1(where drag and dropped) designed class keep it permanently. <img src="https://i.stack.imgur.com/EQjCh.png" alt="enter image description here"></p>
 

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