Bug 29300 - XamlCompilation Not builds user defined BindableProperties
Summary: XamlCompilation Not builds user defined BindableProperties
Alias: None
Product: Forms
Classification: Xamarin
Component: Forms ()
Version: 1.4.2
Hardware: PC Windows
: Normal normal
Target Milestone: ---
Assignee: Stephane Delcroix
Depends on:
Reported: 2015-04-22 06:24 UTC by ebubekirakgul
Modified: 2015-08-05 14:02 UTC (History)
6 users (show)

Tags: xaml xamlc build ac
Is this bug a regression?: ---
Last known good build:

Sample problem that bug occurs (166.43 KB, application/x-zip-compressed)
2015-05-07 02:32 UTC, ebubekirakgul

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Description ebubekirakgul 2015-04-22 06:24:24 UTC
if I create a bindable property in my custom View and assign it from xaml without any markup(with constant value), its not building.

    public class TelerikLineSeries :ContentView
        public static readonly BindableProperty VerticalIntervalProperty =
                    BindableProperty.Create<TelerikLineSeries, double>((p) => p.VerticalInterval, default(double), BindingMode.TwoWay, null);

        public double VerticalInterval
            get { return (double)GetValue(VerticalIntervalProperty); }
            set { SetValue(VerticalIntervalProperty, value); }

and the xaml: <UI:TelerikLineSeries Grid.Column="0" Grid.Row="1" Grid.ColumnSpan="2"   BindingContext="{Binding HourAvgTonHistory}" VerticalInterval="1" />

Error Message: 
Error	10	Value cannot be null.
Parameter name: type	W:\FormsProjects\SampleProject.Mobile\SampleProject.Mobile\SampleProject.Monitoring.Dashboard.Views.MaterialMatrixView.xaml	SampleProject.Mobile
Comment 1 ebubekirakgul 2015-04-22 06:31:58 UTC
You can workaround untill bug resolve:

        <UI:TelerikLineSeries Grid.Column="0" Grid.Row="1" Grid.ColumnSpan="2"   BindingContext="{Binding HourAvgTonHistory}">
Comment 2 Parmendra Kumar 2015-05-06 14:17:25 UTC

I have checked this issue but I am not able to reproduce it.
Here is the screencast for the same: http://www.screencast.com/t/J0afxGa4iMh
Could you please provide us sample project, build output? So that we can reproduce it at our end.

Comment 3 ebubekirakgul 2015-05-07 02:32:13 UTC
Created attachment 11110 [details]
Sample problem that bug occurs

You can find a sample solution which the bug occurs when you're run to project. (Please check MainPage.xaml for further info)
Comment 4 Parmendra Kumar 2015-05-07 06:27:59 UTC
I have checked this issue with attached sample in comment #3.
I am getting same issue mentioned in the bug description.

Screencast: http://www.screencast.com/t/AyECM6SeH09

IDELog: https://gist.github.com/Parmendrak/6a7a2997497c4c60e68c

Environment info:
Xamarin.Forms:, 1..4.3-pre2

Microsoft Visual Studio Professional 2013
Version 12.0.31101.00 Update 4
Microsoft .NET Framework
Version 4.5.51641

Installed Version: Professional

Xamarin   3.11.503.0 (07f7cca)
Visual Studio extension to enable development for Xamarin.iOS and Xamarin.Android.

Xamarin.Android (cbdf025e886eacb95ce7adf53346961156fae990)
Visual Studio plugin to enable development for Xamarin.Android.

Xamarin.Forms Intellisense   1.0
Provides intellisense for Xamarin.Forms in the XML editor.

Xamarin.iOS (7741cc495ab0baf04ff0405d0604bc27f0ecae2e)
Visual Studio extension to enable development for Xamarin.iOS.

Xamarin.iOS Unified Migration   1.0
Automated migration for Xamarin iOS Classic projects to Unified

Xamarin.TestCloud.Integration   1.0
Early preview of Xamarin Test Cloud integration
Comment 5 Parmendra Kumar 2015-08-05 14:02:53 UTC
I have checked this issue X.F and I am not still getting error message

Error Message: 
Error    10    Value cannot be null.
Parameter name: type 

Hence closing this issue. 

If you getting same issue please feel free to reopen this issue.