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In the attached sample I call an async method from the page constructor. The method waits for 10ms and then sets Image to null. However the change isn't reflected in renderer and even worse, you can't remove the image anymore afterwards.
Run the Android application and see that Images are still present-even though the TestViewModel.Image has been set to null-plus button "BindingContext = null" doesn't do anything.
=== Xamarin Studio ===
Version 5.3 (build 423)
Installation UUID: 8e654e5a-bd6e-4158-9e5d-20c7bc16810a
Microsoft .NET 4.0.30319.34011
GTK+ 2.24.22 (MS-Windows theme)
=== Xamarin.Android ===
Version: 4.16.0 (Business Edition)
Android SDK: D:\Android\android-sdk
Supported Android versions:
1.6 (API level 4)
2.1 (API level 7)
2.2 (API level 8)
2.3 (API level 10)
4.0.3 (API level 15)
4.1 (API level 16)
4.2 (API level 17)
4.3 (API level 18)
4.4 (API level 19)
4.4.87 (API level 20)
4.5 (API level 21)
Java SDK: C:\Program Files (x86)\Java\jdk1.6.0_39
java version "1.6.0_39"
Java(TM) SE Runtime Environment (build 1.6.0_39-b04)
Java HotSpot(TM) Client VM (build 20.14-b01, mixed mode, sharing)
=== Build Information ===
Release ID: 503000423
Git revision: f4bb573b38a18c9f5400d8734eada2d5610deae4
Build date: 2014-08-12 17:31:43-04
Xamarin addins: 0961e1860cd1dcb4e47062f25c40d224979a02fb
=== Operating System ===
Windows 6.2.9200.0 (64-bit)
Created attachment 7695 [details]
I have checked this issue with attached sample and I am unable to reproduce this issue.
When I debug the attached sample, I observed that the image is loaded into the simulator and when we remove image from binding context using following code
Image is removed from the binding context (Image property is null) but text (Text property) doesn't removed from the binding context.
I have also tried BindingContext = null and try to assign a "new object()" to BindingContext and observed that the "Text" property disappear from the title but the value "Text" property is still exits i.e. "Turbo" .
Windows 6.1.7601.65536 (64-bit)
Microsoft Visual Studio Professional 2013
Version 12.0.30501.00 Update 2
Microsoft .NET Framework
Installed Version: Professional
Xamarin 18.104.22.168 (0b2a123923812a88ed3091909478dbe9e0111f00)
OS X 10.9.2
Xamarin.iOS: 22.214.171.124 (Enterprise Edition)
Mono 3.8.0 ((no/62a857e)
Xcode 5.1.1 (5085)