I'm trying to bind a property to a textblock without success. I've got a "Notifier" class which contains the INotifyPropertyChanged event. Model classes inherit from the "Notifier" class.
namespace MyOffice.Models
{public class Notifier : INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;
public void OnPropertyChanged(string name)
{
System.Diagnostics.Debug.WriteLine("OnProperty called");
if (PropertyChanged!=null)
{
System.Diagnostics.Debug.WriteLine("PropertyChanged called");
PropertyChanged(this, new PropertyChangedEventArgs(name));
}
}
}
}
The "Online" class follows:
namespace MyOffice.Models
{
public class Online : Notifier
{
private string _dbUser;
internal string DbUser { get; set; }
internal System.Security.SecureString DbPass { get; set; }
private string _progressMessage;
public string ProgressMessage
{
get => _progressMessage;
set
{
_progressMessage = value;
System.Diagnostics.Debug.WriteLine("progress message changed");
OnPropertyChanged("ProgressMessage");
}
}
}
}
Class "All" serves as the nest of various model classes like Online and others.
namespace MyOffice.Models
{
public class AllModels : Notifier
{
public Doc Doc {get; set;}
public Online Online {get; set;}
public AllModels()
{
Doc = new Doc();
Online = new Online();
}
}
}
And here is the xaml:
<Window x:Class="MyOffice.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
Title="blahblah" Height="768" Width="1366" FontSize="16" FontFamily="Arial" WindowStartupLocation="CenterScreen" WindowState="Maximized" Cursor="Arrow" Icon="Resources/medical-bag.ico" Background="DarkCyan" Closing="MainWin_Closing" WindowStyle="None" DataContext="All">
<Window.Resources>
<Style x:Key="leftPanelButtons" TargetType="{x:Type Button}">
<Setter Property="FontFamily" Value="Georgia"/>
<Setter Property="HorizontalContentAlignment" Value="Center"/>
<Setter Property="VerticalAlignment" Value="Center"/>
<Setter Property="HorizontalAlignment" Value="Stretch"/>
<Setter Property="VerticalAlignment" Value="Stretch"/>
<Setter Property="DockPanel.Dock" Value="Top"/>
<Setter Property="Height" Value="Auto"/>
<Setter Property="Foreground" Value="White"/>
<Setter Property="Margin" Value="0,0,0,0"/>
<Setter Property="Background" Value="ForestGreen"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type Button}">
<Border Background="{TemplateBinding Background}" BorderBrush="ForestGreen" BorderThickness="0">
<ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center" Margin="5"/>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
<Style.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter Property="Background" Value="DarkSeaGreen"/>
</Trigger>
</Style.Triggers>
</Style>
<Style x:Key="upperPanelButtons" TargetType="{x:Type Button}">
<Setter Property="Background" Value="DarkCyan"/>
<Setter Property="FontFamily" Value="Georgia"/>
<Setter Property="HorizontalContentAlignment" Value="Center"/>
<Setter Property="VerticalAlignment" Value="Center"/>
<Setter Property="HorizontalAlignment" Value="Stretch"/>
<Setter Property="VerticalAlignment" Value="Stretch"/>
<Setter Property="DockPanel.Dock" Value="Top"/>
<Setter Property="Height" Value="Auto"/>
<Setter Property="Foreground" Value="White"/>
<Setter Property="Margin" Value="0,0,0,0"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type Button}">
<Border Background="{TemplateBinding Background}" BorderBrush="DarkCyan" BorderThickness="0">
<ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center"/>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
<Style.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter Property="Background" Value="DarkTurquoise"/>
</Trigger>
</Style.Triggers>
</Style>
<Style x:Key="exitButtons" TargetType="{x:Type Button}">
<Setter Property="Background" Value="DarkRed"/>
<Setter Property="FontFamily" Value="Georgia"/>
<Setter Property="HorizontalContentAlignment" Value="Center"/>
<Setter Property="VerticalAlignment" Value="Center"/>
<Setter Property="HorizontalAlignment" Value="Stretch"/>
<Setter Property="VerticalAlignment" Value="Stretch"/>
<Setter Property="DockPanel.Dock" Value="Top"/>
<Setter Property="Height" Value="Auto"/>
<Setter Property="Foreground" Value="White"/>
<Setter Property="Margin" Value="0,0,0,0"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type Button}">
<Border Background="{TemplateBinding Background}" BorderBrush="DarkRed" BorderThickness="0">
<ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center"/>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
<Style.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter Property="Background" Value="IndianRed"/>
</Trigger>
</Style.Triggers>
</Style>
<Style x:Key="invisibleTabs" TargetType="{x:Type TabItem}">
<Setter Property="Visibility" Value="Hidden"/>
<Setter Property="Height" Value="0"/>
<Setter Property="Margin" Value="0,0,0,0"/>
</Style>
</Window.Resources>
<Grid x:Name="gridMain" Margin="0,0,0,0" HorizontalAlignment="Stretch" VerticalAlignment="Stretch">
<Grid.RowDefinitions>
<RowDefinition Height="46" />
<!--<RowDefinition Height="35"/>-->
<RowDefinition Height="*"/>
<RowDefinition Height="35"/>
</Grid.RowDefinitions>
<!--<TextBlock Grid.Row="0" x:Name="txbName" HorizontalAlignment="Left" Margin="5,5,0,0" TextWrapping="Wrap" Text="Όνοματεπώνυμο" VerticalAlignment="Top" Height="18" Width="130"/>-->
<UniformGrid Grid.Row="0" Width="Auto" Height="Auto" VerticalAlignment="Stretch" HorizontalAlignment="Stretch" Rows="1">
<UniformGrid.Resources>
<Style BasedOn="{StaticResource upperPanelButtons}" TargetType="Button"/>
</UniformGrid.Resources>
<Button Content="1" Click="Button_Click_1"/>
<Button Content="2" Click="Button_Click_2"/>
<Button Content="3" Click="Button_Click_3"/>
<Button Content="4" Click="Button_Click_4"/>
<Button Content="5" Click="Button_5"/>
<Button Content="6" Style="{StaticResource exitButtons}" Click="Button_Click_UpperPanelExit"/>
</UniformGrid>
<DockPanel Grid.Row="1">
<DockPanel Height="Auto" Width="Auto" VerticalAlignment="Stretch">
<UniformGrid Columns="1" Height="Auto" VerticalAlignment="Stretch" MinWidth="150" Width="Auto">
<UniformGrid.Resources>
<Style BasedOn="{StaticResource leftPanelButtons}" TargetType="Button"/>
</UniformGrid.Resources>
<Button Click="Click_Button_asdfasdf">
aadfasdf
</Button>
<Button Click="Click_Button_efefefe">
efefefe
</Button>
<Button Click="Click_Button_t5t5t5t">
t5t5t5t5t5
</Button>
<Button Click="Click_Button_jujujujuj">
jujujujuju
</Button>
<Button Click="Click_Button_lklklklkl">
klklklklkl
</Button>
<Button Click="Click_Button_dkdkdkd">
dkdkdkdk
</Button>
<Button Click="Click_Button_fawf">
wefwef
</Button>
</UniformGrid>
<DockPanel Height="Auto" Width="Auto" Background="PaleGoldenRod" VerticalAlignment="Stretch" HorizontalAlignment="Stretch" Margin="0,0,0,0">
<Grid>
<Frame x:Name="mainFrame"></Frame>
</Grid>
</DockPanel>
</DockPanel>
</DockPanel>
<Border Grid.Row="2" Margin="5,0,5,0" Height="24" Width="1366" >
<TextBlock x:Name="txbProgress" TextWrapping="NoWrap" Width="1366" Background="DarkCyan" Foreground="White" Text="{Binding Path=All.Online.ProgressMessage, Mode=OneWay}" TextAlignment="Center"/>
</Border>
</Grid>
</Window>
And - finally - this is the MainWindow code:
namespace MyOffice
{
public partial class MainWindow : Window
{
public Models.AllModels All {get; set;}
public MainWindow()
{
InitializeComponent();
All = new Models.AllModels();
DataContext = All;
All.Online.ProgressMessage = "progressing...";
}
}
}
Whenever the property (progressMessage) is changed the "OnPropertyChanged" method is run but "PropertyChanged" is always null... and the execution never reaches the following statement:
PropertyChanged(this, new PropertyChangedEventArgs(name));
therefore the textblock never shows any "progressMessage". Why is it always null? Is there something wrong with the program? Please note that I've changed internal to public (both the class and the related property) and it still won't work...
