StackLayout Visibility doesn't changed on Property Change in ListView - xaml

Question

I have a grouped ObservableCollection which is binded to a ListView.
I have a number of StackLayout inside the ListView who's visibility changes upon the ListView tapp.
All others properties inside reacts to the PropertyChange but the visibility of the StackLayout doesnot.
All this is done on UI Thread.
Can anyone else has/had this issue?
Updating the UI inside a loop
Device.BeginInvokeOnMainThread(() =>
{
item.Effort = SelectedTaskItem.Effort;
finalEffortDouble = SelectedTaskItem.Effort + finalEffortDouble - previousEffort;
item.IsSaved = true;
item.IsNotSaved = false;
item.EffortsString = SelectedTime.ToString("hh':'mm") + " h";
TotalEffortsHoursString = TimeSpan.FromHours(finalEffortDouble + TotalEffortsHours).ToString("hh'.'mm") + " hrs";
});
IsSaved , IsNotSaved are bool which are binded to the StackLayout visibility property inside a ListView.
<StackLayout Grid.Row="0" Grid.Column="0" Grid.ColumnSpan="2" IsVisible="{Binding IsNotSaved,Mode=TwoWay}" Padding="0" Margin="0" HorizontalOptions="FillAndExpand">
<Label Text="{Binding TaskName}" FontAttributes="Bold" FontSize="16" LineBreakMode="TailTruncation" />
<Label Text="Enter time spent on this task daily" FontSize="12" />
</StackLayout>
<StackLayout Grid.Row="0" Grid.Column="1" IsVisible="{Binding IsNotSaved,Mode=TwoWay}" Orientation="Horizontal" VerticalOptions="CenterAndExpand" Spacing="10" HorizontalOptions="End" Padding="0" Margin="0">
<ffimageloading:CachedImage Source="tsplus">
<ffimageloading:CachedImage.GestureRecognizers>
<TapGestureRecognizer Tapped="EditTime_Tapped" CommandParameter="{Binding .}" />
</ffimageloading:CachedImage.GestureRecognizers>
</ffimageloading:CachedImage>
</StackLayout>
<StackLayout x:Name="Is1" Grid.Row="0" Grid.Column="0" Grid.ColumnSpan="2" IsVisible="{Binding IsSaved,Mode=TwoWay}" Padding="0" Margin="0" HorizontalOptions="FillAndExpand">
<Label Text="{Binding TaskName}" FontAttributes="Bold" FontSize="16" LineBreakMode="TailTruncation" />
<StackLayout Orientation="Horizontal" Padding="0" Margin="0" HorizontalOptions="FillAndExpand">
<Label Text="Tap on time to edit" FontSize="12" />
<ffimageloading:CachedImage Source="savedtag" WidthRequest="60" HeightRequest="20" />
</StackLayout>
</StackLayout>
<StackLayout x:Name="Is2" Grid.Row="0" Grid.Column="1" IsVisible="{Binding IsSaved,Mode=TwoWay}" VerticalOptions="CenterAndExpand" HorizontalOptions="End" Padding="0" Margin="0">
<StackLayout.GestureRecognizers>
<TapGestureRecognizer Tapped="EditTime_Tapped" CommandParameter="{Binding .}" />
</StackLayout.GestureRecognizers>
<Label Text="{Binding EffortsString}" FontSize="24" VerticalOptions="Center" TextColor="{x:Static common:ColorResources.NavigationBarColor}" />
</StackLayout>
Model of the binded ObservableCollection
public class ProjectListWithTasksModel : List<TaskModel>
{
public List<TaskModel> Tasks => this;
public string ProjectName { get; set; }
}
Task Model:
public class TaskModel : ObservableObject
{
public string TaskGUID { get; set; }
public string TaskName { get; set; }
public string EffortStatus { get; set; }
public string TaskStatus { get; set; }
private double _Effort;
public double Effort
{
get { return _Effort; }
set
{
_Effort = value;
RaisePropertyChanged("Effort");
}
}
public DateTime EffortDate { get; set; }
public DateTime EffortDay { get; set; }
//UI Models : Used for UI Changes
public string ProjectID { get; set; }
public DateTime LastWorkingDay { get; set; }
private bool _IsSaved;
public bool IsSaved
{
get
{
if (this.EffortStatus.Contains("10"))
_IsSaved = true;
else
_IsSaved = false;
return _IsSaved;
}
set
{
_IsSaved = value;
RaisePropertyChanged("IsSaved");
}
}
public bool IsSubmitted
{
get
{
if (this.EffortStatus.Contains("20"))
{
return true;
//&& LastWorkingDay.Date >= DateTime.Now.Date
}
else
return false;
}
}
public bool IsApproved
{
get
{
if (this.EffortStatus.Contains("30"))
{
return true;
}
else
return false;
}
}
public bool IsRejected
{
get
{
if (this.EffortStatus.Contains("40"))
{
return true;
}
else
return false;
}
}
public string _EffortsString;
public string EffortsString
{
get
{
_EffortsString = TimeSpan.FromHours(Effort).ToString("hh':'mm") + " h";
return _EffortsString;
}
set
{
_EffortsString = value;
RaisePropertyChanged("EffortsString");
}
}
private bool _IsNotSaved;
public bool IsNotSaved
{
get
{
if (this.EffortStatus.Contains("0 "))
_IsNotSaved = true;
else
_IsNotSaved = false;
return _IsNotSaved;
}
set
{
_IsNotSaved = value;
RaisePropertyChanged("IsNotSaved");
}
}
}

Answer 1

I think the problem is that IsSaved depends by EffortStatus, so you should not have a "Set" for "IsSaved". I think you should "RaiseProperty" IsSaved (and IsNotSaved) when EffortStatus i set. Something like:
public string EffortStatus
{
get
{
return _EffortStatus;
}
set
{
_EffortStatus= value;
if (_EffortStatus.Contains("10"))
IsSaved = true;
else
IsSaved = false;
RaisePropertyChanged("EffortStatus");
RaisePropertyChanged("IsSaved");
}
}