Xamarin.Forms 2.1.0.6500-pre1

Build native UIs for iOS, Android, and Windows Phone from a single, shared C# codebase

This is a prerelease version of Xamarin.Forms.
There is a newer version of this package available.
See the version list below for details.
Install-Package Xamarin.Forms -Version 2.1.0.6500-pre1
dotnet add package Xamarin.Forms --version 2.1.0.6500-pre1
<PackageReference Include="Xamarin.Forms" Version="2.1.0.6500-pre1" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add Xamarin.Forms --version 2.1.0.6500-pre1
The NuGet Team does not provide support for this client. Please contact its maintainers for support.

Release Notes

## New Features ##

### ControlTemplates ###

ControlTemplates have been introduced into the 2.1.0 branch, and have been included on the following types:

- [`ContentPage`](https://developer.xamarin.com/api/type/Xamarin.Forms.ContentPage/)
- [`ContentView`](https://developer.xamarin.com/api/type/Xamarin.Forms.ContentView/)
- `TemplatedPage`
- `TemplatedView`

`TemplatedPage` and `TemplatedView` now serve as the base class for `ContentPage` and `ContentView`. ControlTemplates can be used to define the visual appearance of a Control or [`Page`](http://developer.xamarin.com/api/type/Xamarin.Forms.Page/) while providing a clean separation from the visual hierarchy and the Content itself. ControlTemplates can be applied via Style to greatly expand themeability in Xamarin.Forms.

Along with ControlTemplates the concept of TemplateBindings has been introduced. TemplateBindings work identically to normal Bindings however their Source is automatically set to the parent of the target view which owns the ControlTemplate. Usage of a TemplateBinding outside of a ControlTemplate is not supported.

For more details on how to use ControlTemplates see here: http://xfcomplete.net/general/2016/01/20/control-templates/

### DataTemplateSelector ###

IDataTempalteSelectors allow the selection of a DataTemplate at runtime per item in a ListView.ItemsSource.

Usage:

```csharp
class MyDataTemplateSelector : DataTemplateSelector
{
public MyDataTemplateSelector ()
{
// Retain instances!
this.templateOne = new DataTemplate (typeof (ViewA));
this.templateTwo = new DataTemplate (typeof (ViewB));
}

protected override DataTemplate OnSelectTemplate (object item, BindableObject container)
{
if (item is double)
return this.templateOne;
return this.templateTwo;
}

private readonly DataTemplate templateOne;
private readonly DataTemplate templateTwo;
}
```

```xml
<ListView DataTemplate=local:MyDataTemplateSelector />
```

DataTemplateSelectors have the following limitations:

- No more than 20 templates per ListView on Android
- The DataTemplateSelector subclass MUST always return the same template for the same data if queried multiple times
- The DataTemplateSelector must not return another DataTemplateSelector
- The DataTemplateSelector must not return new instances of a DataTemplate on each call, instead the same instance must be returned. Failure to do so will effectively disable virtualization and lead to an enormous memory leak. Don't do this.

### Effects ###

Effects provide an easy way to customize the native look and feel of controls without having to resort to a complete Custom Renderer.   You can use these to customize the native controls, for example, the following Effect shows how to create a Border effect on iOS that will set a 2 pixel purple outline on the control:

```csharp
// located inside iOS specific codebase
public class BorderEffect : PlatformEffect
{
protected override void OnAttached ()
{
Control.Layer.BorderColor = UIColor.Purple.CGColor;
Control.Layer.BorderWidth = 2;
}

protected override void OnDetached ()
{
Control.Layer.BorderWidth = 0;
}
}
```

To apply this effect, all you have to do is attached it via the `IList<Effect> Effects` collection on Element.   This is a much simpler way of fine tuning your user interface with native touches.

### Other Improvements ###

- HasUnevenRows dynamic sizing support;
- ListView Virtualization is now supported on Windows ;
- Generic versions of Create () BindableProperty are no longer supported and deprecated;
- The Entry/Editor updates on WP8 and WinRT are now consistent with other platforms;

## Bug Fixes ##

- [Bug 21780](https://bugzilla.xamarin.com/show_bug.cgi?id=21780) - Windows Phone Editor control has black background with black text, background turns to white when editing.
- [Bug 24769](https://bugzilla.xamarin.com/show_bug.cgi?id=24769) - [Win Phone/winrt] Progress Bar in listview item not working
- [Bug 26868](https://bugzilla.xamarin.com/show_bug.cgi?id=26868) - GroupHeaders do not extend on Windows Phone and WINRT
- [Bug 30370](https://bugzilla.xamarin.com/show_bug.cgi?id=30370) - Background Color on an Entry Control is Applied to the Padding
- [Bug 32615](https://bugzilla.xamarin.com/show_bug.cgi?id=32615) - [Android] OnAppearing is not called on previous page when modal page is popped
- [Bug 32847](https://bugzilla.xamarin.com/show_bug.cgi?id=32847) - Picker text is cleared after selecting an item, whether Picker, DatePicker, or TimePicker
- [Bug 33268](https://bugzilla.xamarin.com/show_bug.cgi?id=33268) - Picker is broken on Windows 8.1
- [Bug 33870](https://bugzilla.xamarin.com/show_bug.cgi?id=33870) - crash when the listview selection is disabled on Windows Phone 8.1 RT
- [Bug 35490](https://bugzilla.xamarin.com/show_bug.cgi?id=35490) - Label Text Misaligned in Windows Phone 8.1 and WinRT (Xamarin Nuget Version 1.5.1.6471)
- [Bug 35811](https://bugzilla.xamarin.com/show_bug.cgi?id=35811) - Navigation.PushAsync from TabbedPage then hit back button causes crash
- [Bug 36171](https://bugzilla.xamarin.com/show_bug.cgi?id= 36171) - WinRT Entry UI not updating on TextChanged
- [Bug 36174](https://bugzilla.xamarin.com/show_bug.cgi?id= 36174) - Android Search Bar vertical text alignment in Forms 2.0
- [Bug 36251](https://bugzilla.xamarin.com/show_bug.cgi?id=36251) - Issues when switching between pages of a TabbedPage on iOS
- [Bug 36422](https://bugzilla.xamarin.com/show_bug.cgi?id=36422) - XamlC Fails When using X:Array in Xaml. Throws NullReferenceExceptio
- [Bug 36559](https://bugzilla.xamarin.com/show_bug.cgi?id=36559) - [WP] Navigating to a ContentPage with a Grid inside a TableView affects Entry heights
- [Bug 36649](https://bugzilla.xamarin.com/show_bug.cgi?id=36649) - LineBreakMode.NoWrap is handled incorrectly on Windows Phone 8.1 RT
- [Bug 36687](https://bugzilla.xamarin.com/show_bug.cgi?id=36687) - On WinPhone 8.1 RT, the background color used in Entry fields is not as expected
- [Bug 36730](https://bugzilla.xamarin.com/show_bug.cgi?id=36730) - OnStart / OnResume are not called on WP8.1 and UWP
- [Bug 36778](https://bugzilla.xamarin.com/show_bug.cgi?id=36778) - ListView on UWP doesn't display Detail line with TextCell
- [Bug 37306](https://bugzilla.xamarin.com/show_bug.cgi?id=37306) - XamlC doesn´t support adding x:String in resource dictionary
- [Bug 37675](https://bugzilla.xamarin.com/show_bug.cgi?id=37675) - Style PropertyChanged called before the Style is applied
- [Bug 37779](https://bugzilla.xamarin.com/show_bug.cgi?id=37779) - TabbedPageRenderer throws exceptions on Android 4.0.4 when using Material Design theme
- Fixes to OnAppearing/OnDisappearing;
- Fixes to PanGestureRecognizer on android;
- Fixes to animation safety;
- UWP fix headerzoom;
- Fixes an issue where images sometimes didn't load on WP8;


## Known Issues ##

- WinRT reloads toolbar items on navigation even when they haven't changed

Showing the top 10 GitHub repositories that depend on Xamarin.Forms:

Repository Stars
dotnet-architecture/eShopOnContainers
Easy to get started sample reference microservice and container based application. Cross-platform on Linux and Windows Docker Containers, powered by .NET Core 2.2, Docker engine and optionally Azure, Kubernetes or Service Fabric. Supports Visual Studio, VS for Mac and CLI based environments with Docker CLI, dotnet CLI, VS Code or any other code editor.
microsoft/ailab
Experience, Learn and Code the latest breakthrough innovations with Microsoft AI
reactiveui/ReactiveUI
An advanced, composable, functional reactive model-view-viewmodel framework for all .NET platforms that is inspired by functional reactive programming. ReactiveUI allows you to abstract mutable state away from your user interfaces, express the idea around a feature in one readable place and improve the testability of your application.
PrismLibrary/Prism
Prism is a framework for building loosely coupled, maintainable, and testable XAML applications in WPF, Windows 10 UWP, and Xamarin Forms.
xamarin/xamarin-forms-samples
Sample apps built using the Xamarin.Forms framework
MvvmCross/MvvmCross
The .NET MVVM framework for cross-platform solutions, including Xamarin.iOS, Xamarin.Android, Windows and Mac.
mono/monodevelop
MonoDevelop is a cross platform .NET IDE
Caliburn-Micro/Caliburn.Micro
A small, yet powerful framework, designed for building applications across all XAML platforms. Its strong support for MV* patterns will enable you to build your solution quickly, without the need to sacrifice code quality or testability.
reactiveui/Akavache
An asynchronous, persistent key-value store created for writing desktop and mobile applications, based on SQLite3. Akavache is great for both storing important data as well as cached local data that expires.
xamarin/XamarinComponents
Plugins for Xamarin

Version History

Version Downloads Last updated
4.3.0.851321-pre3 5,071 10/2/2019
4.3.0.819712-pre2 6,164 9/19/2019
4.3.0.778476-pre1 6,097 9/11/2019
4.2.0.848062 41,067 10/2/2019
4.2.0.815419 46,108 9/19/2019
4.2.0.778463 40,560 9/11/2019
4.2.0.709249 87,124 8/21/2019
4.2.0.673161-pre3 6,782 8/7/2019
4.2.0.618605-pre2 8,162 7/24/2019
4.2.0.608146-pre1 3,519 7/16/2019
4.1.0.778454 6,919 9/11/2019
4.1.0.709244 18,564 8/21/2019
4.1.0.673156 76,436 8/7/2019
4.1.0.618606 78,567 7/24/2019
4.1.0.581479 91,402 7/9/2019
4.1.0.555618 152,913 6/28/2019
4.1.0.496342-pre2 7,102 6/13/2019
4.1.0.483098-pre1 4,757 6/5/2019
4.0.0.709238 1,786 8/21/2019
4.0.0.618610 2,226 7/24/2019
4.0.0.540366 31,268 6/27/2019
4.0.0.497661 63,559 6/13/2019
4.0.0.482894 50,056 6/3/2019
4.0.0.425677 180,728 5/14/2019
4.0.0.394984-pre10 9,394 5/3/2019
4.0.0.346134-pre9 15,804 4/18/2019
4.0.0.304370-pre8 11,008 4/3/2019
4.0.0.250467-pre7 7,624 3/20/2019
4.0.0.232914-pre6 8,526 3/14/2019
4.0.0.169046-pre5 6,024 2/21/2019
4.0.0.135214-pre4 4,733 2/6/2019
4.0.0.94569-pre3 4,348 1/24/2019
4.0.0.62955-pre2 13,576 1/10/2019
4.0.0.8055-pre1 13,853 12/4/2018
3.6.0.709228 7,570 8/21/2019
3.6.0.539721 23,498 6/27/2019
3.6.0.344457 173,918 4/18/2019
3.6.0.293080 96,442 4/3/2019
3.6.0.264807 165,946 3/19/2019
3.6.0.220655 109,166 3/6/2019
3.6.0.169048-pre2 550 2/21/2019
3.6.0.135200-pre1 4,979 2/6/2019
3.5.0.274416 16,710 3/26/2019
3.5.0.169047 92,901 2/20/2019
3.5.0.129452 138,482 2/6/2019
3.5.0.94564-pre3 1,129 1/24/2019
3.5.0.62956-pre2 1,057 1/10/2019
3.4.0.1039999 13,421 3/26/2019
3.4.0.1029999 91,315 1/24/2019
3.4.0.1009999 108,286 1/4/2019
3.4.0.1008975 466,122 11/15/2018
3.4.0.987044-pre2 2,378 11/8/2018
3.4.0.925479-pre1 11,177 10/18/2018
3.3.0.967583 170,379 11/1/2018
3.3.0.912540 125,181 10/18/2018
3.3.0.893527-pre3 8,029 10/11/2018
3.3.0.871608-pre2 12,290 10/1/2018
3.3.0.840541-pre1 6,299 9/20/2018
3.2.0.871581 117,374 10/3/2018
3.2.0.839982 166,167 9/17/2018
3.2.0.809874-pre3 3,865 9/10/2018
3.2.0.729530-pre2 13,198 8/14/2018
3.2.0.637442-pre1 10,960 7/17/2018
3.1.0.697729 360,777 8/1/2018
3.1.0.637273 109,470 7/11/2018
3.1.0.583944 151,144 6/20/2018
3.1.0.561732-pre4 6,442 6/11/2018
3.1.0.550168-pre3 3,120 6/6/2018
3.1.0.530888-pre2 1,944 6/4/2018
3.1.0.469394-pre1 11,517 5/9/2018
3.0.0.561731 147,490 6/11/2018
3.0.0.550146 28,281 6/6/2018
3.0.0.530893 21,813 6/4/2018
3.0.0.482510 254,631 5/14/2018
3.0.0.446417 137,746 5/1/2018
3.0.0.427558-pre4 9,385 4/25/2018
3.0.0.354232-pre3 14,315 4/5/2018
3.0.0.296286-pre2 8,439 3/20/2018
2.5.1.527436 94,372 5/4/2018
2.5.1.444934 173,435 4/4/2018
2.5.1.392594-pre3 4,309 3/21/2018
2.5.1.340284-pre2 6,569 3/9/2018
2.5.1.317207-pre1 5,810 3/1/2018
2.5.0.280555 329,199 2/16/2018
2.5.0.122203 341,016 12/18/2017
2.5.0.121934 222,665 11/28/2017
2.5.0.91635 166,586 11/16/2017
2.5.0.77107 30,958 11/13/2017
2.5.0.75255-pre3 5,577 11/10/2017
2.5.0.19271-pre2 9,583 10/20/2017
2.4.0.91020 50,142 11/16/2017
2.4.0.74863 35,291 11/10/2017
2.4.0.38779 62,223 10/30/2017
2.4.0.18342 56,315 10/20/2017
2.4.0.282 164,931 9/29/2017
2.4.0.280 206,951 9/27/2017
2.4.0.275-pre3 8,260 9/19/2017
2.4.0.269-pre2 13,881 8/29/2017
2.4.0.266-pre1 20,102 8/16/2017
2.3.5.256-pre6 36,295 6/29/2017
2.3.5.255-pre5 5,054 6/26/2017
2.3.5.239-pre3 28,334 5/11/2017
2.3.5.235-pre2 11,454 4/26/2017
2.3.5.233-pre1 9,323 4/13/2017
2.3.4.270 154,823 8/29/2017
2.3.4.267 68,936 8/16/2017
2.3.4.247 426,817 5/16/2017
2.3.4.231 214,376 4/12/2017
2.3.4.224 252,226 3/29/2017
2.3.4.221-pre6 7,589 3/27/2017
2.3.4.214-pre5 10,481 3/14/2017
2.3.4.212-pre4 6,410 3/10/2017
2.3.4.211-pre3 4,345 3/9/2017
2.3.4.192-pre2 19,624 2/3/2017
2.3.4.184-pre1 13,178 1/13/2017
2.3.3.193 249,405 2/1/2017
2.3.3.180 212,431 1/5/2017
2.3.3.175 118,849 12/6/2016
2.3.3.168 67,269 11/23/2016
2.3.3.166-pre4 8,230 11/3/2016
2.3.3.163-pre3 6,556 10/17/2016
2.3.3.152-pre2 16,284 9/15/2016
2.3.2.127 293,181 9/14/2016
2.3.2.118-pre1 6,967 8/3/2016
2.3.1.114 157,036 8/3/2016
2.3.1.113-pre3 3,972 7/19/2016
2.3.1.111-pre2 4,907 7/4/2016
2.3.1.110-pre1 2,624 6/29/2016
2.3.0.107 208,047 6/29/2016
2.3.0.49 89,205 6/16/2016
2.3.0.46-pre3 16,317 5/30/2016
2.3.0.38-pre2 13,379 4/27/2016
2.3.0.34-pre1 8,950 4/27/2016
2.2.0.45 139,365 5/30/2016
2.2.0.31 128,630 4/27/2016
2.2.0.23-pre4 3,247 4/20/2016
2.2.0.18-pre3 2,461 4/20/2016
2.2.0.5-pre2 16,156 4/8/2016
2.2.0.4-pre1 18,671 4/5/2016
2.1.0.6529 99,167 3/13/2016
2.1.0.6526 17,772 3/9/2016
2.1.0.6524 36,883 3/2/2016
2.1.0.6521 12,304 3/1/2016
2.1.0.6517-pre5 2,340 2/18/2016
2.1.0.6513-pre4 2,322 2/9/2016
2.1.0.6508-pre3 2,638 1/28/2016
2.1.0.6503-pre2 7,225 1/22/2016
2.1.0.6501-pre1 1,778 1/21/2016
2.1.0.6500-pre1 1,604 1/20/2016
2.0.1.6505 93,973 1/28/2016
2.0.1.6495 75,464 1/20/2016
2.0.1.6492-pre1 4,061 12/3/2015
2.0.0.6490 98,714 12/1/2015
2.0.0.6484 18,025 11/21/2015
2.0.0.6482 242,856 11/17/2015
1.5.2.6478-pre3 1,482 11/17/2015
1.5.2.6477-pre2 4,122 11/10/2015
1.5.2.6469-pre1 2,409 10/20/2015
1.5.1.6471 77,360 10/20/2015
1.5.1.6468 4,132 10/20/2015
1.5.1.6460-pre2 1,875 10/13/2015
1.5.1.6455-pre1 3,234 10/2/2015
1.5.0.6447 56,404 9/25/2015
1.5.0.6446 22,019 9/16/2015
1.5.0.6404-pre3 3,524 8/25/2015
1.5.0.6401-pre2 1,726 8/21/2015
1.5.0.6396-pre1 2,163 8/5/2015
1.4.4.6449 2,973 9/25/2015
1.4.4.6443 1,872 9/16/2015
1.4.4.6392 77,796 7/29/2015
1.4.4.6391 2,218 7/28/2015
1.4.4.6387 3,155 7/27/2015
1.4.4.6379-pre3 1,745 7/20/2015
1.4.4.6378-pre2 1,566 7/16/2015
1.4.4.6377-pre1 1,572 7/14/2015
1.4.3.6376 43,049 7/9/2015
1.4.3.6374 16,885 7/1/2015
1.4.3.6372 2,298 6/30/2015
1.4.3.6364-pre3 2,545 6/16/2015
1.4.3.6358-pre2 5,986 4/24/2015
1.4.3.6356-pre1 1,656 4/21/2015
1.4.2.6359 63,527 4/30/2015
1.4.2.6355 14,680 4/21/2015
1.4.2.6353-pre2 2,710 3/31/2015
1.4.2.6350-pre1 1,761 3/30/2015
1.4.1.6349 44,880 3/30/2015
1.4.1.6347-pre2 3,444 3/19/2015
1.4.1.6342-pre1 1,898 3/10/2015
1.4.0.6341 29,299 3/9/2015
1.4.0.6340-pre2 2,746 3/6/2015
1.4.0.6336-pre1 1,730 3/3/2015
1.3.5.6337 5,332 3/5/2015
1.3.5.6335 25,631 3/2/2015
1.3.5.6333-pre1 2,307 2/17/2015
1.3.4.6332 19,545 2/17/2015
1.3.4.6331-pre4 1,762 2/13/2015
1.3.4.6329-pre3 1,489 2/12/2015
1.3.4.6328-pre2 1,496 2/11/2015
1.3.4.6325-pre1 1,461 2/9/2015
1.3.3.6323 53,591 2/9/2015
1.3.3.6322-pre3 1,460 2/6/2015
1.3.3.6321-pre2 1,621 2/4/2015
1.3.3.6318-pre1 1,617 2/2/2015
1.3.2.6316 7,985 2/3/2015
1.3.2.6313-pre3 1,606 1/30/2015
1.3.2.6309-pre2 1,653 1/28/2015
1.3.2.6299-pre1 2,363 1/20/2015
1.3.1.6296 57,527 1/4/2015
1.3.1.6294-pre1 4,692 12/24/2014
1.3.0.6292 9,841 12/24/2014
1.3.0.6286-pre4 2,362 12/19/2014
1.3.0.6284-pre3 1,864 12/12/2014
1.3.0.6280-pre2 1,819 12/9/2014
1.3.0.6275-pre1 8,092 11/12/2014
1.2.3.6257 39,499 10/2/2014
1.2.3.6256-pre4 2,502 9/26/2014
1.2.3.6255-pre3 2,910 9/20/2014
1.2.3.6249-pre2 2,087 9/9/2014
1.2.3.6246-pre1 4,663 8/15/2014
1.2.2.6243 29,050 7/30/2014
1.2.2.6241-pre3 3,020 7/28/2014
1.2.2.6240-pre2 4,857 7/22/2014
1.2.2.6238-pre1 4,019 7/17/2014
1.2.1.6229 8,830 7/14/2014
1.1.1.6206 14,470 6/19/2014
1.1.0.6201 13,900 6/12/2014
1.0.6197 4,537 6/4/2014
1.0.6188 12,046 5/28/2014
Show less