Navigation Drawer crashes on rotation

[Emil]

Hi,

if I define   SfNavigationDrawer as below, DrawerContet has a listview for some filters and it is not always visible, only when drawer has IsOpen=true, it sets also visible. Doing that I achieve to keep memory allocation lower but problem here is, if I rotate, my tablet (I tested on 10 inch tablet emulator also), usually after 2nd rotation, it throws exception as below. 

 

            <navigation:SfNavigationDrawer x:Name="navigationDrawer"  Grid.Row="3"   IsOpen="{Binding IsVisible, Mode=TwoWay}" Position="Right" Transition="Reveal"

                                           HorizontalOptions="FillAndExpand" VerticalOptions="FillAndExpand" DrawerHeaderHeight="0" DrawerFooterHeight="0">

                <navigation:SfNavigationDrawer.DrawerContentView>

                    <sfListView:SfListView x:Name="list" AutoFitMode="Height" VerticalOptions="FillAndExpand" HorizontalOptions="FillAndExpand"   IsVisible="{Binding IsVisible, Mode=OneWay}"  SelectionMode="Single"   />

                </navigation:SfNavigationDrawer.DrawerContentView>

                <navigation:SfNavigationDrawer.ContentView>

 

Exception:

4-17 10:06:52.941 I/MonoDroid(24614): System.InvalidOperationException: Collection was modified; enumeration operation may not execute.

04-17 10:06:52.941 I/MonoDroid(24614):   at System.ThrowHelper.ThrowInvalidOperationException (System.ExceptionResource resource) [0x0000b] in <fcbf47a04b2e4d90beafbae627e1fca4>:0 

04-17 10:06:52.941 I/MonoDroid(24614):   at System.Collections.Generic.List`1+Enumerator[T].MoveNextRare () [0x00013] in <fcbf47a04b2e4d90beafbae627e1fca4>:0 

04-17 10:06:52.942 I/MonoDroid(24614):   at System.Collections.Generic.List`1+Enumerator[T].MoveNext () [0x0004a] in <fcbf47a04b2e4d90beafbae627e1fca4>:0 

04-17 10:06:52.942 I/MonoDroid(24614):   at Xamarin.Forms.Platform.Android.VisualElementRenderer`1[TElement].UpdateLayout (System.Collections.Generic.IEnumerable`1[T] children) [0x0003f] in D:\agent\_work\1\s\Xamarin.Forms.Platform.Android\VisualElementRenderer.cs:298 

04-17 10:06:52.942 I/MonoDroid(24614):   at Xamarin.Forms.Platform.Android.VisualElementRenderer`1[TElement].OnLayout (System.Boolean changed, System.Int32 l, System.Int32 t, System.Int32 r, System.Int32 b) [0x0001f] in D:\agent\_work\1\s\Xamarin.Forms.Platform.Android\VisualElementRenderer.cs:293 

04-17 10:06:52.942 I/MonoDroid(24614):   at Xamarin.Forms.Platform.Android.FormsViewGroup.n_OnLayout_ZIIII (System.IntPtr jnienv, System.IntPtr native__this, System.Boolean p0, Sys

[Rabhia Beham Kathar Mideenar]

Hi Emil,

Thanks for Contacting Syncfusion Support.

We could not reproduce the reported issue in SfNavigationDrawer control. We have prepared a sample for the same. Please have the sample from the below link.

Sample Link: http://www.syncfusion.com/downloads/support/forum/137068/ze/NavigationDrawer137068-1444692325 

Please check the sample and if the issue still persists please modify the same with the issue reproducing steps which will be helpful for us to analyse further and provide an appropriate solution.

Please let us know if you have any concern.

Regards,
Rabhia Beham K.