Question

This looks so embarrassing and most awful to ask question again and again for the same thing.

Really sorry but i couldn’t still figure it out or not working as expected

in my previous post @slugster suggested converter ,so used his code like below

MyView.xaml

    <UserControl.Resources>
        <!-- Image Buttons -->
        <Converters:BooleanToVisibilityConverter x:Key="visibilityConverter"></Converters:BooleanToVisibilityConverter>
       <!--Label-->
        <Converters:BooleanToVisibilityConverter x:Key="BooleanToVisibilityConverter"></Converters:BooleanToVisibilityConverter>

 <Label Name="isImageValid"  Content="Image not Created" Margin="0,7,1,0" Style="{StaticResource LabelField}"
                Grid.ColumnSpan="2" Grid.Row="15" Width="119" Height="28" Grid.RowSpan="2"
                Grid.Column="1" IsEnabled="True" 
                Visibility="{Binding isImageValid,Converter={StaticResource BooleanToVisibilityConverter}}" />                

myviewModel.cs

private bool _isImageValid;                  
public bool IsImageValid
{
    get { return _isImageValid; }
    set 
    {
        _isImageValid = value;
        this.RaisePropertyChanged(() => this.IsImageValid);
    }
}

private void OnImageResizeCompleted(bool isSuccessful)
{
    if (isSuccessful)
    {
        this.SelectedStory.KeyframeImages = true;
        _isImageValid = false;
        // isImageValid = System.Windows.Visibility.Collapsed;
    }
    else
        this.SelectedStory.KeyframeImages = false;
}

when i debug the code,its not even reflect in the UI,when “OnImageResizeCompleted” method called and “_isImageValid=False”.Again am lost now.I know i get lot of negative comments but sorry i couldn’t able to figure it out myself.

Answer 1

First, correct Visibility="{Binding isImageValid... line. Your view model property is IsImageValid.

Second, OnImageResizeCompleted() method does not notify UI about IsImageValid property changes, it simply modifies property backing field. Change _isImageValid = false to IsImageValid = false.