尝试从设计类中添加以编程方式在设计时添加到窗体中的winforms控件

Question

Ok so I added a contextmenustrip to form1 in a winforms app. I have a standard class elsewhere that takes a treenode as a parameter and does things to it. One of the things I would like to do is set the context menu. The context menu was added to the form manually at design time.

I have tried things like:

public static void MethodThatAddsAContextMenu(TreeNode node)
{
    node.ContextMenuStrip = Application.OpenForms[0].Controls["myContextMenu"] as ContextMenuStrip;
}

And what seems like a million subtle and not so subtle variations. My code doesn't find the control. Although it looks like the context menu isn't actually part of the forms control collection when I drill in via my watch list.

Any help appreciated. Also I did this on my iPad, looks like its formatted ok but apologies if not.

Thanks in advance.

Ok, Boo as per your suggestion probably easier to just post the code:

private static TreeNode CreateSecurityNode(Security Sec)
{
    TreeNode sn = new TreeNode(Sec.SecurityName);
    sn.Tag = Sec;
    sn.ContextMenuStrip = Application.OpenForms[0].Container.Components["securityContext"] as ContextMenuStrip;
}

Container returns null .

Answer 1

ContextMenuStrip would not be part of the Form.Controls collection. It is a component, not a control.

I would try passing in the ContextMenuStrip with the TreeNode.

Alternatively you could have your class construct and attach a context menu at runtime.

Also-

You could populate a List<ContextMenuStrip> with all your context menus (or a Dictionary<ContextMenuStrip> ) and expose that as a property of the form:

public List<ContextMenuStrip> contextMenus {get;set;}

// // form load event, possibly
this.contextMenus.Add(myContextMenu);