Bug 25694 - xaml binding on toolbarItem.Text Fails
Summary: xaml binding on toolbarItem.Text Fails
Alias: None
Product: Forms
Classification: Xamarin
Component: Forms ()
Version: 1.3.0
Hardware: PC Windows
: Normal normal
Target Milestone: 1.3.4
Assignee: Bugzilla
: 26299 ()
Depends on:
Reported: 2015-01-03 20:20 UTC by Erik Renaud
Modified: 2015-02-11 06:03 UTC (History)
9 users (show)

Is this bug a regression?: ---
Last known good build:

Sample App (4.50 MB, application/octet-stream)
2015-01-05 13:37 UTC, Udham Singh

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Description Erik Renaud 2015-01-03 20:20:57 UTC
Given this xaml

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
    <Label Text="{Binding MainText}" VerticalOptions="Center" HorizontalOptions="Center" />
    <ToolbarItem Text="{Binding MainText}"  Command="{Binding MainTextCommand}" />

and this class1

    public partial class Class1
        public Class1()

            MainText = "initial";
            MainTextCommand = new Command(() =>
                MainText = "changed";

                var inpc = this as INotifyPropertyChanged;
                if (inpc.PropertyChanged != null) inpc.PropertyChanged(this, new PropertyChangedEventArgs("MainText")); //TODO xamarin.forms doesn't seem to be able to accept this binding

            BindingContext = this;

        public string MainText { get; set; }

        public Command MainTextCommand { get; set; }

The result is that even though PropertyChanged is raised for the binding corresponding to the Text property of the ToolbarItem, the change doesn`t propagate.
Comment 1 Udham Singh 2015-01-05 13:37:24 UTC
Created attachment 9241 [details]
Sample App

Hi Erik, 

We have tried to reproduce this issue with the help of code provided in bug description but not able to reproduce this. Could you please provide a sample app and screencast that demonstrate this issue? So that we can reproduce this issue at our end.

I am attaching a sample app which I have created to reproduce this issue. Please have a look on this and let me know if I am missing any thing.

Comment 2 Erik Renaud 2015-01-05 13:52:12 UTC
You can try the following project 


and try to run the WinPhone app.

Regards, Erik.
Comment 3 Jason Smith [MSFT] 2015-01-26 13:08:12 UTC
*** Bug 26299 has been marked as a duplicate of this bug. ***
Comment 4 Jason Smith [MSFT] 2015-02-06 16:10:10 UTC
Should be fixed in 1.3.4-pre1
Comment 5 Ram Chandra 2015-02-11 06:03:40 UTC
I have checked this issue with following builds:

Microsoft Visual Studio Professional 2013
Version 12.0.30723.00 Update 3
Microsoft .NET Framework
Version 4.5.51641
Installed Version: Professional
Xamarin (080a254)
Xamarin.Android (49a04b966feb40dfdba49d57ba16249b66d606a6)
Xamarin.iOS (3b3ef438017c7ecf486defa9e01567a5f2b3cb2a)
Xamarin.iOS Unified Migration   1.0

When I deployed the attached project on windows emulator and press the toolbar item, the PropertyChanged is raised and the changes also applied to the toolbar item.

Screencast: http://www.screencast.com/t/KTGxWhNzs7BZ

This issue has been fixed. Hence I am closing this issue.