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Created attachment 9201 [details] Include this MainPage in a blank XForms project The issue is with ItemTapped event of ListView on Windows Phone. The event doesn't fire if tapping two times on the same item: basically on WP behaves as ItemSelected event. Different behavior running the same code for instance on Android. This can be easily reproduced in a XF App with following MainPage markup <Grid> <Grid.ColumnDefinitions> <ColumnDefinition Width="*" /> </Grid.ColumnDefinitions> <Grid.RowDefinitions> <RowDefinition Height="*" /> <RowDefinition Height="100" /> </Grid.RowDefinitions> <ListView x:Name="MyListView" RowHeight="80" ItemsSource="{Binding }"> <ListView.ItemTemplate> <DataTemplate> <ViewCell> <ViewCell.View> <Label Text="{Binding }" TextColor="Green" Font="28" /> </ViewCell.View> </ViewCell> </DataTemplate> </ListView.ItemTemplate> </ListView> <Label Grid.Row="1" x:Name="LogLabel" Font="28" Text="XXX" TextColor="Red" /> </Grid> and following code behind: public ObservableCollection<string> Items { get; set; } private int _counter = 0; public MainPage() { this.Items = new ObservableCollection<string>(); InitializeComponent(); this.BindingContext = this.Items; MyListView.ItemTapped += (sender, e) => { LogLabel.Text = string.Format("{0} - Item {1} Tapped!", _counter++, (string)e.Item); }; } protected override void OnAppearing() { this.Items.Add("First"); this.Items.Add("Second"); this.Items.Add("Third"); base.OnAppearing(); }
I have checked this issue and I am able to reproduce this issue. Steps I followed: 1. Create a Blank App(Xamarin.Forms Portable) in VS 2. Use the test case mentioned in bug description. 3. Build and deploy app to emulator. When I tap the OK button I observed that I am getting following exception: >System.ArgumentNullException was unhandled by user code HResult=-2147467261 Message=Value cannot be null. Screencast: http://www.screencast.com/t/zePdEt5q Exception Details: https://gist.github.com/RamChBachkheti/43189c3f431ec1f93fc4 Debug logs: https://gist.github.com/RamChBachkheti/bdf424a68aeccc485ab0 IDE logs: https://gist.github.com/RamChBachkheti/d84752cbce58e5ffd55e Environment Info: Xamarin.Forms.1.3.0.6292 Microsoft Visual Studio Professional 2013 Version 12.0.30723.00 Update 3 Microsoft .NET Framework Version 4.5.51641 Installed Version: Professional LightSwitch for Visual Studio 2013 06177-004-0447006-02641 Microsoft LightSwitch for Visual Studio 2013 Team Explorer for Visual Studio 2013 06177-004-0447006-02641 Microsoft Team Explorer for Visual Studio 2013 Visual Basic 2013 06177-004-0447006-02641 Microsoft Visual Basic 2013 Visual C# 2013 06177-004-0447006-02641 Microsoft Visual C# 2013 Visual C++ 2013 06177-004-0447006-02641 Microsoft Visual C++ 2013 Visual F# 2013 06177-004-0447006-02641 Microsoft Visual F# 2013 Visual Studio 2013 Code Analysis Spell Checker 06177-004-0447006-02641 Microsoft® Visual Studio® 2013 Code Analysis Spell Checker Portions of International CorrectSpell™ spelling correction system © 1993 by Lernout & Hauspie Speech Products N.V. All rights reserved. The American Heritage® Dictionary of the English Language, Third Edition Copyright © 1992 Houghton Mifflin Company. Electronic version licensed from Lernout & Hauspie Speech Products N.V. All rights reserved. Windows Phone SDK 8.0 - ENU 06177-004-0447006-02641 Windows Phone SDK 8.0 - ENU Application Insights Tools for Visual Studio Package 1.0 Application Insights Tools for Visual Studio ASP.NET and Web Tools 12.3.50717.0 Microsoft Web Developer Tools contains the following components: Support for creating and opening ASP.NET web projects Browser Link: A communication channel between Visual Studio and browsers Editor extensions for HTML, CSS, and JavaScript Page Inspector: Inspection tool for ASP.NET web projects Scaffolding: A framework for building and running code generators Server Explorer extensions for Microsoft Azure Websites Web publishing: Extensions for publishing ASP.NET web projects to hosting providers, on-premises servers, or Microsoft Azure ASP.NET Web Frameworks and Tools 2012.2 4.1.21001.0 For additional information, visit http://go.microsoft.com/fwlink/?LinkID=309563 ASP.NET Web Frameworks and Tools 2013 5.2.20703.0 For additional information, visit http://www.asp.net/ Common Azure Tools 1.2 Provides common services for use by Azure Mobile Services and Microsoft Azure Tools. Microsoft Advertising SDK for Windows Phone Microsoft Advertising SDK for Windows Phone Build Microsoft Azure Mobile Services Tools 1.2 Microsoft Azure Mobile Services Tools NuGet Package Manager 2.8.50926.663 NuGet Package Manager in Visual Studio. For more information about NuGet, visit http://docs.nuget.org/. Office Developer Tools for Visual Studio 2013 ENU 12.0.30626 Microsoft Office Developer Tools for Visual Studio 2013 ENU PowerShell Tools 1.2 Provides file classification services using PowerShell PreEmptive Analytics Visualizer 1.2 Microsoft Visual Studio extension to visualize aggregated summaries from the PreEmptive Analytics product. SQL Server Data Tools 12.0.30919.1 Microsoft SQL Server Data Tools Windows Phone 8.1 SDK Integration 1.0 This package integrates the tools for the Windows Phone 8.1 SDK into the menus and controls of Visual Studio. Workflow Manager Tools 1.0 1.0 This package contains the necessary Visual Studio integration components for Workflow Manager. Xamarin 3.8.150.0 (10cfd178d55287f09c85f5a1e604dfe20889a40f) Visual Studio extension to enable development for Xamarin.iOS and Xamarin.Android. Xamarin.Android 4.20.0.28 (ba9bbbdd44cfdc4bf485e8885bd2ad24fba525f7) Visual Studio plugin to enable development for Xamarin.Android. Xamarin.iOS 8.4.0.0 (840a925103a0bf4a856507f13d5eaee3c1579c2f) Visual Studio extension to enable development for Xamarin.iOS. Xamarin.iOS Unified Migration 1.0 Automated migration for Xamarin iOS Classic projects to Unified
Should be fixed in 1.3.2-pre1
I have checked this issue with following builds: Xamarin.Forms.1.3.2.6299-pre1 Microsoft Visual Studio Professional 2013 Version 12.0.30723.00 Update 3 Microsoft .NET Framework Version 4.5.51641 Installed Version: Professional Xamarin 3.9.236.0 (d6a2cae) Xamarin.Android 4.20.0.34 (49a04b966feb40dfdba49d57ba16249b66d606a6) Xamarin.iOS 8.6.0.0 (eb24bdcf5cba2c12b673a07e0a8cce368b9563b3) Xamarin.iOS Unified Migration 1.0 To verify this issue I have used the test case mentioned in bug description and observed that when I tap two times on the same item the event is working fine. Screencast: http://www.screencast.com/t/B6EnRRNZPhLo This issue has been fixed. Hence I am closing this issue.