async void Button_Clicked(object sender, EventArgs e)
{
Debug.WriteLine(">>>>>>>> Invoking Garbage Collector");
GarbageCollectionHelper.Collect();
await Navigation.PushAsync(new BugPage());
}
protected override void Init()
{
var result = new Label
{
FontSize = 16,
Text = "Click 'Push page' twice"
};
var list = new List <WeakReference>();
var checkButton = new Button
{
Text = "Check Result",
IsEnabled = false,
Command = new Command(() =>
{
if (list.Count < 2)
{
result.Text = "Click 'Push page' again";
return;
}
GarbageCollectionHelper.Collect();
result.Text = list[list.Count - 2].IsAlive ? "Failed" : "Success";
})
};
Content = new StackLayout
{
Children =
{
result,
new Button
{
Text = "Push page",
Command = new Command(async() => {
var page = new LeakPage();
var wref = new WeakReference(page);
await Navigation.PushAsync(page);
await page.Navigation.PopAsync();
GarbageCollectionHelper.Collect();
list.Add(wref);
if (list.Count > 1)
{
checkButton.IsEnabled = true;
result.Text = "You can check result";
}
else
{
result.Text = "Again";
}
})
},
checkButton
}
};
}
public Bugzilla45722Xaml0()
{
#if APP
InitializeComponent();
Model = new ObservableCollection <_45722Group>();
RefreshModel();
IsGroupingEnabled = true;
BindingContext = this;
RefreshButton.Clicked += (sender, args) => { RefreshModel(); };
GCButton.Clicked += (sender, args) =>
{
GarbageCollectionHelper.Collect();
};
MessagingCenter.Subscribe <_45722Label>(this, _45722Label.CountMessage, sender =>
{
Device.BeginInvokeOnMainThread(() =>
{
CurrentCount.Text = _45722Label.Count.ToString();
// GroupHeader label + (3 items per group * 2 labels per item) = 7
Result.Text = (_45722Label.Count - (ItemCount * 7)) <= 0 ? Success : Running;
});
});
#endif
}
protected override void Init()
{
var label = new Label()
{
Text = "Testing..."
};
var goButton = new Button {
Text = "Go", AutomationId = "Go"
};
goButton.Clicked += (sender, args) => Application.Current.MainPage = new _44166MDP();
var gcButton = new Button {
Text = "GC", AutomationId = "GC"
};
gcButton.Clicked += (sender, args) =>
{
GarbageCollectionHelper.Collect();
if (_44166MDP.Counter > 0)
{
Debug.WriteLine($">>>>>>>> Post-GC, {_44166MDP.Counter} {nameof(_44166MDP)} allocated");
}
if (_44166Master.Counter > 0)
{
Debug.WriteLine($">>>>>>>> Post-GC, {_44166Master.Counter} {nameof(_44166Master)} allocated");
}
if (_44166Detail.Counter > 0)
{
Debug.WriteLine($">>>>>>>> Post-GC, {_44166Detail.Counter} {nameof(_44166Detail)} allocated");
}
if (_44166NavContent.Counter > 0)
{
Debug.WriteLine($">>>>>>>> Post-GC, {_44166NavContent.Counter} {nameof(_44166NavContent)} allocated");
}
int success = 0;
//some reason there's always 1 instance around i don't know why yet, if we were leaking it should be 8 here
if (Device.RuntimePlatform == Device.macOS)
{
success = 4;
}
if (_44166NavContent.Counter + _44166Detail.Counter + _44166Master.Counter + _44166MDP.Counter == success)
{
label.Text = "Success";
}
};
Content = new StackLayout
{
Children = { label, goButton, gcButton }
};
}
void OnAllEventsDetached(object sender, EventArgs args)
{
AttachedStateEffects.Clear();
AttachedStateEffects.AllEventsDetached -= OnAllEventsDetached;
GarbageCollectionHelper.Collect();
AllEffectsHaveDetached.Text = "Success";
}
public Page2()
{
GarbageCollectionHelper.Collect();
Title = "Page2";
System.Diagnostics.Debug.WriteLine("Constructor");
NavigationPage.SetBackButtonTitle(this, "Custom");
}
static Page CreateWeakReferencedPage()
{
GarbageCollectionHelper.Collect();
var result = CreatePage();
s_pageRefs.Add(new WeakReference(result));
return(result);
}
async void OnAllEventsAttached(object sender, EventArgs args)
{
AttachedStateEffects.AllEventsAttached -= OnAllEventsAttached;
// needed otherwise UWP crashes
await Task.Delay(100);
await Navigation.PopAsync();
GarbageCollectionHelper.Collect();
}
async void StartTrackPage2()
{
while (true)
{
((Label)((StackLayout)Content).Children[0]).Text =
string.Format("Page1. But Page2 IsAlive = {0}", _page2Tracker.IsAlive);
await Task.Delay(1000);
GarbageCollectionHelper.Collect();
}
}
public void Issue4973Test()
{
RunningApp.Tap(q => q.Text("Tab5"));
RunningApp.WaitForElement(q => q.Text("Test"));
GarbageCollectionHelper.Collect();
RunningApp.Tap(q => q.Text("Tab1"));
RunningApp.Tap(q => q.Text("Tab2"));
}
protected override void Init()
{
Button createPage, sendMessage, doGC;
Label instanceCount = new Label();
Label messageCount = new Label();
instanceCount.Text = $"Instances: {_45926SecondPage.InstanceCounter.ToString()}";
messageCount.Text = $"Messages: {_45926SecondPage.MessageCounter.ToString()}";
var content = new ContentPage
{
Title = "Test",
Content = new StackLayout
{
VerticalOptions = LayoutOptions.Center,
Children =
{
(createPage = new Button {
Text = "New Page"
}),
(sendMessage = new Button {
Text = "Send Message"
}),
(doGC = new Button {
Text = "Do GC"
}),
instanceCount, messageCount
}
}
};
createPage.Clicked += (s, e) =>
{
PushAsync(new _45926IntermediatePage());
PushAsync(new _45926SecondPage());
};
sendMessage.Clicked += (s, e) =>
{
MessagingCenter.Send(this, "Test");
};
doGC.Clicked += (sender, e) =>
{
GarbageCollectionHelper.Collect();
instanceCount.Text = $"Instances: {_45926SecondPage.InstanceCounter.ToString()}";
messageCount.Text = $"Messages: {_45926SecondPage.MessageCounter.ToString()}";
};
PushAsync(content);
}
static Page CreateWeakReferencedPage()
{
GarbageCollectionHelper.Collect();
var result = CreatePage();
s_pageRefs.Add(new WeakReference(result));
// Add a second unreferenced page to prove that the problem only exists
// when pages are actually navigated to/from
s_pageRefs.Add(new WeakReference(CreatePage()));
GarbageCollectionHelper.Collect();
return(result);
}
async void StartTrackPage2()
{
var n = 0;
while (_page2Tracker.IsAlive)
{
_resultLabel.Text = $"Page2 IsAlive = {_page2Tracker.IsAlive} ({n++})";
await Task.Delay(1000);
GarbageCollectionHelper.Collect();
}
_resultLabel.Text = $"Page2 IsAlive = {_page2Tracker.IsAlive}";
}
public LandingPage1023()
{
Label = new Label
{
Text = "Counter: " + Counter,
HorizontalTextAlignment = TextAlignment.Center,
VerticalTextAlignment = TextAlignment.Center
};
Content = new StackLayout
{
Orientation = StackOrientation.Vertical,
HorizontalOptions = LayoutOptions.Center,
VerticalOptions = LayoutOptions.Center,
Spacing = 15,
Children =
{
new Label
{
Text = "Click Push to show a ListView. When you hit the Back button, Counter will show the number of pages that have not been finalized yet."
+ " If you click GC, the counter should be 0."
},
Label,
new Button
{
Text = "GC",
AutomationId = "GC",
Command = new Command(o =>
{
GarbageCollectionHelper.Collect();
Label.Text = "Counter: " + Counter;
})
},
new Button
{
Text = "Push",
AutomationId = "Push",
Command = new Command(async o =>
{
await Navigation.PushAsync(new ContentPage1023());
})
}
}
};
}
async void StartTrackPage2()
{
var watch = new Stopwatch();
watch.Start();
// We'll let this run until the references are dead or timeout has passed
while (_page2Tracker.IsAlive && _tabTracker.IsAlive && watch.ElapsedMilliseconds < Timeout)
{
await Task.Delay(1000);
GarbageCollectionHelper.Collect();
}
watch.Stop();
_result.Text = _page2Tracker.IsAlive || _tabTracker.IsAlive ? Fail : Success;
}
protected override void Init()
{
AllEffectsHaveDetached = new Label()
{
AutomationId = "AllEventsHaveDetached",
Text = "If this text doesn't change then all effects haven't detached"
};
var newPage = new ContentPage
{
Content =
new StackLayout()
{
Children =
{
new Button
{
Text = "Show New ListView",
Command = new Command(async o => await Navigation.PushAsync(new ListPage())),
},
new Button
{
Text = "Garbage Collection Things",
Command = new Command(() =>
{
GarbageCollectionHelper.Collect();
AttachedStateEffects.Clear();
}),
},
AllEffectsHaveDetached
}
},
AutomationId = "ContentPage"
};
AttachedStateEffects.AllEventsAttached += OnAllEventsAttached;
AttachedStateEffects.AllEventsDetached += OnAllEventsDetached;
var listPage = new ListPage();
Navigation.PushAsync(listPage);
Navigation.InsertPageBefore(newPage, listPage);
}
protected override void Init()
{
var viewModel = new ObservableCollection <_55365Item>
{
new _55365Item {
Subject = 65
}
};
viewModel.CollectionChanged += OnCollectionChanged;
_itemsPanel.BindingContext = viewModel;
foreach (_55365Item item in viewModel)
{
_itemTemplate.SetValue(BindingContextProperty, item);
var view = (View)_itemTemplate.CreateContent();
_itemsPanel.Children.Add(view);
}
var clearButton = new Button {
Text = "Clear", Command = new Command(o => viewModel.Clear())
};
_layout.Children.Add(clearButton);
var collectButton = new Button
{
Text = "Garbage",
Command = new Command(o =>
{
GarbageCollectionHelper.Collect();
_layout.Children.Add(new Label {
Text = "Success"
});
})
};
_layout.Children.Add(collectButton);
_layout.Children.Add(_itemsPanel);
Content = _layout;
}
protected override async void Init()
{
Flyout = new ContentPage {
Title = "Title"
};
Detail = new NavigationPage(new Issue9419Page());
await Task.Delay(TimeSpan.FromSeconds(3));
Detail = new NavigationPage(new Issue9419Page());
await Task.Delay(TimeSpan.FromSeconds(3));
GarbageCollectionHelper.Collect();
Detail = new NavigationPage(new ContentPage {
Content = new Label {
Text = OkResult
}
});
}
void GCbutton_Clicked(object sender, EventArgs e)
{
System.Diagnostics.Debug.WriteLine(">>>>>>>> Running Garbage Collection");
GarbageCollectionHelper.Collect();
System.Diagnostics.Debug.WriteLine($">>>>>>>> GC.GetTotalMemory = {GC.GetTotalMemory(true):n0}");
}
protected override void OnAppearing()
{
base.OnAppearing();
GarbageCollectionHelper.Collect();
}
async void Button_Clicked(object sender, EventArgs e)
{
await Navigation.PushAsync(new ListPage());
GarbageCollectionHelper.Collect();
}
protected override void Init()
{
_currentLabelCount = new Label();
_statusLabel = new Label {
Text = Running
};
MessagingCenter.Subscribe <_45722Label>(this, _45722Label.CountMessage, sender =>
{
Device.BeginInvokeOnMainThread(() =>
{
_currentLabelCount.Text = _45722Label.Count.ToString();
_statusLabel.Text = _45722Label.Count - ItemCount <= 0 ? Success : Running;
});
});
var lv = new ListView(ListViewCachingStrategy.RetainElement);
var items = new ObservableCollection <_45722Model>();
foreach (var item in CreateItems())
{
items.Add(item);
}
var dt = new DataTemplate(() =>
{
var layout = new Grid();
var label = new _45722Label();
label.SetBinding(Label.TextProperty, new Binding("Text"));
var bt = new Button {
Text = "Go"
};
bt.SetBinding(Button.CommandProperty, new Binding("Command"));
var en = new Entry {
Text = "entry"
};
layout.Children.Add(bt);
layout.Children.Add(en);
layout.Children.Add(label);
Grid.SetRow(bt, 1);
Grid.SetRow(en, 2);
return(new ViewCell {
View = layout
});
});
lv.ItemsSource = items;
lv.ItemTemplate = dt;
var button = new Button {
Text = Update
};
button.Clicked += (sender, args) =>
{
items.Clear();
foreach (var item in CreateItems())
{
items.Add(item);
}
};
var collect = new Button()
{
Text = Collect
};
collect.Clicked += (sender, args) =>
{
GarbageCollectionHelper.Collect();
};
Title = "Bugzilla 45722";
Content = new StackLayout
{
Padding = new Thickness(0, 20, 0, 0),
Children = { _currentLabelCount, _statusLabel, button, collect, lv }
};
}
protected override void Init()
{
if (Application.Current.Resources == null)
{
Application.Current.Resources = new ResourceDictionary();
}
if (!Application.Current.Resources.ContainsKey("SomeSmallImage"))
{
ImageSource smallImage;
switch (Device.RuntimePlatform)
{
default:
smallImage = "coffee.png";
break;
case Device.UWP:
smallImage = "bank.png";
break;
}
Application.Current.Resources.Add("SomeSmallImage", smallImage);
}
const string instructions1 = @"Tap the Start button and follow the instructions on the next page.";
string instructions2 =
$"When you return to this page, tap the Collect button. The message \n'{Bugzilla42069_Page.DestructorMessage}'\n should appear at least once in the debug output.";
var label1 = new Label {
Text = instructions1
};
var label2 = new Label {
Text = instructions2, HorizontalTextAlignment = TextAlignment.Center
};
var startButton = new Button {
Text = "Start"
};
startButton.Clicked += (sender, args) =>
{
// We have to do the push-pop-push dance because NavigationPage
// holds a reference to its last page for unrelated reasons; our concern
// here is that the first Bugzilla42069_Page that we pushed gets collected
PushAsync(new Bugzilla42069_Page(), false);
PopAsync(false);
PushAsync(new Bugzilla42069_Page(), false);
};
var collectButton = new Button {
Text = "Collect"
};
collectButton.Clicked += (sender, args) =>
{
GarbageCollectionHelper.Collect();
};
var startPage = new ContentPage
{
Content = new StackLayout
{
Children =
{
label1,
startButton,
label2,
collectButton
}
}
};
PushAsync(startPage);
}
protected override void OnAppearing()
{
base.OnAppearing();
GarbageCollectionHelper.Collect();
otherLabel.Text = Success;
}