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Original file line number Diff line number Diff line change
Expand Up @@ -9835,6 +9835,9 @@ internal virtual void RecreateHandleCore()
// the call shouldn't fail.
// However, it could fail if this.CreateParams.Parent is changed outside our control.
CreateHandle();

// DestroyHandle resets the state, but CreateHandle doesn't set the state back.
SetState(States.Created, true);
}
catch (Exception)
{
Expand Down
Original file line number Diff line number Diff line change
Expand Up @@ -730,7 +730,7 @@ public void Control_GetNextItem_Buttons_CycleForwardExpected(RightToLeft rightTo
using Button button1 = new();
using Button button2 = new();
using Button button3 = new();
control.Controls.AddRange(new Button[] { button1, button2, button3});
control.Controls.AddRange(new Button[] { button1, button2, button3 });
Control nextControl1 = control.GetNextControl(button1, forward: true);
Control nextControl2 = control.GetNextControl(button2, forward: true);
Control nextControl3 = control.GetNextControl(button3, forward: true);
Expand Down Expand Up @@ -974,6 +974,62 @@ public void Control_SelectNextControl_ToolStrips_CycleBackwardExpected(RightToLe
Assert.True(toolStrip2.IsHandleCreated);
}

[WinFormsFact]
public void Control_RecreateHandleCore_invokes_OnParentHandleRecreated_for_children()
{
using Form form = new();
SubCheckedListBox checkedListBox1 = new();
SubButton button1 = new();
SubListBox listBox1 = new();
SubListView listView1 = new();

checkedListBox1.Items.AddRange(new object[] { "Foo", "Foo", "Foo" });
checkedListBox1.Location = new Point(10, 10);
checkedListBox1.Size = new Size(103, 64);

button1.Location = new Point(12, 166);
button1.Size = new Size(213, 20);

listBox1.Items.AddRange(new object[] { "Foo", "Foo", "Foo" });
listBox1.Location = new Point(12, 80);
listBox1.Size = new Size(101, 69);

listView1.Items.AddRange(new ListViewItem[] { new("Foo"), new("Foo"), new("Foo") });
listView1.Location = new Point(130, 10);
listView1.Size = new Size(121, 64);
listView1.View = View.List;

form.Controls.Add(checkedListBox1);
form.Controls.Add(button1);
form.Controls.Add(listBox1);
form.Controls.Add(listView1);

form.Show();

// This will recreate the handle.
form.ShowInTaskbar = false;

try
{
AssertHandler(button1);
AssertHandler(listView1);
AssertHandler(checkedListBox1);
AssertHandler(listBox1);
}
finally
{
form.Close();
}

return;

static void AssertHandler(IParentHandleRecreationHandler handler)
{
Assert.Equal(1, handler.OnParentHandleRecreatedCalled);
Assert.Equal(1, handler.OnParentHandleRecreatingCalled);
}
}

private class SubControl : Control
{
public SubControl() : base()
Expand Down Expand Up @@ -1301,5 +1357,83 @@ public Control GetNextSelectableControl(Control ctl, bool forward, bool tabStopO

public new void WndProc(ref Message m) => base.WndProc(ref m);
}

private class SubCheckedListBox : CheckedListBox, IParentHandleRecreationHandler
{
public int OnParentHandleRecreatedCalled { get; private set; }
public int OnParentHandleRecreatingCalled { get; private set; }

internal override void OnParentHandleRecreated()
{
OnParentHandleRecreatedCalled++;
base.OnParentHandleRecreated();
}

internal override void OnParentHandleRecreating()
{
OnParentHandleRecreatingCalled++;
base.OnParentHandleRecreating();
}
}

private class SubListBox : ListBox, IParentHandleRecreationHandler
{
public int OnParentHandleRecreatedCalled { get; private set; }
public int OnParentHandleRecreatingCalled { get; private set; }

internal override void OnParentHandleRecreated()
{
OnParentHandleRecreatedCalled++;
base.OnParentHandleRecreated();
}

internal override void OnParentHandleRecreating()
{
OnParentHandleRecreatingCalled++;
base.OnParentHandleRecreating();
}
}

private class SubButton : Button, IParentHandleRecreationHandler
{
public int OnParentHandleRecreatedCalled { get; private set; }
public int OnParentHandleRecreatingCalled { get; private set; }

internal override void OnParentHandleRecreated()
{
OnParentHandleRecreatedCalled++;
base.OnParentHandleRecreated();
}

internal override void OnParentHandleRecreating()
{
OnParentHandleRecreatingCalled++;
base.OnParentHandleRecreating();
}
}

private class SubListView : ListView, IParentHandleRecreationHandler
{
public int OnParentHandleRecreatedCalled { get; private set; }
public int OnParentHandleRecreatingCalled { get; private set; }

internal override void OnParentHandleRecreated()
{
OnParentHandleRecreatedCalled++;
base.OnParentHandleRecreated();
}

internal override void OnParentHandleRecreating()
{
OnParentHandleRecreatingCalled++;
base.OnParentHandleRecreating();
}
}

private interface IParentHandleRecreationHandler
{
int OnParentHandleRecreatedCalled { get; }
int OnParentHandleRecreatingCalled { get; }
}
}
}