We Keep Coding

Binding in WPF not propagating into usercontrol

I am new and learning WPF. I am making a demo project to learn the working of binding and dependency properties. To make it easy to understand I briefly explain this project. In solution, I have three projects. Two projects are user control and one is the main application.
This is user control for the child page
<UserControl x:Class="DefectTracking.DefectTrace"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
mc:Ignorable="d"
d:DesignHeight="450" d:DesignWidth="1200"
Grid.IsSharedSizeScope="True"
Loaded="ElementGeladen"
Name="Self">
<UserControl.Resources>
<ResourceDictionary Source="Resources.xaml" />
</UserControl.Resources>
<UserControl.Style>
<Style TargetType="{x:Type UserControl}">
<Setter Property="Background" Value="{StaticResource Hintergrundfarbe}"/>
</Style>
</UserControl.Style>
<Grid DataContext="{Binding ElementName=Self}" Margin="4">
<FrameworkElement x:Name="ProxyElement"/>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition/>
</Grid.RowDefinitions>
<!--#region Kopfzeile -->
<Grid Grid.Row="0">
<Grid.ColumnDefinitions>
<ColumnDefinition SharedSizeGroup="Ergebnisse"/>
<ColumnDefinition SharedSizeGroup="Name"/>
<ColumnDefinition SharedSizeGroup="Folgefehler" Width="*"/>
<ColumnDefinition SharedSizeGroup="Fehler"/>
<ColumnDefinition SharedSizeGroup="Aktiviert"/>
</Grid.ColumnDefinitions>
<TextBox Grid.Column="2" Style="{StaticResource FolgefehlerStil}" Text="FF" />
<TextBox Grid.Column="3" Style="{StaticResource FehlerStil}" Text="Fehler"/>
<TextBox Grid.Column="4" Style="{StaticResource FehlerStil}" Text="Aktiviert"/>
</Grid>
<!--#endregion-->
<!--#region Prüfung -->
<ItemsControl Grid.Row="1" ItemsSource="{Binding Prüfungen}" Name="Prüfungselement">
<ItemsControl.ItemTemplate>
<DataTemplate>
<Grid Background="Black">
<Grid.ColumnDefinitions>
<ColumnDefinition SharedSizeGroup="Ergebnisse"/>
<ColumnDefinition SharedSizeGroup="Name"/>
<ColumnDefinition SharedSizeGroup="Folgefehler"/>
<ColumnDefinition SharedSizeGroup="Fehler"/>
<ColumnDefinition SharedSizeGroup="Aktiviert"/>
</Grid.ColumnDefinitions>
<!--#region Ergebnisse -->
<ItemsControl Grid.Column="0" ItemsSource="{Binding Ergebnisse}" Style="{StaticResource ErgebnisStil}" Background="Black" MouseDoubleClick="ItemsControl_MouseDoubleClick">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<DockPanel/>
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
</ItemsControl>
<!--#endregion-->
<!--#region Tabelle -->
<TextBox Grid.Column="1" Margin="10,0" MinWidth="50" Text="{Binding Path=Name}" Style="{StaticResource PrüfungsnameStil}"/>
<TextBox Grid.Column="2" MinWidth="40" Text="{Binding Path=Folgefehler}" Style="{StaticResource FolgefehlerStil}"/>
<TextBox Grid.Column="3" MinWidth="60" Text="{Binding Path=Fehler}" Style="{StaticResource FehlerStil}" IsReadOnly="True"/>
<CheckBox Grid.Column="4" MinWidth="40" IsChecked="{Binding Status, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" Margin="5,0,0,0"/>
<!--#endregion-->
</Grid>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
<!--#endregion-->
</Grid>
<!--#region Folgefehlerschieber -->
<Canvas>
<Thumb DragDelta="LinealVerschieben" Canvas.Left="450" Canvas.Top="0">
<Thumb.Template>
<ControlTemplate>
<Grid>
<Line X1="0" Y1="0" X2="0"
Y2="{Binding ActualHeight, Source={x:Reference ProxyElement}}"
Canvas.ZIndex="2"
Style="{StaticResource LinealStil}" Cursor="Hand">
</Line>
<Rectangle Width="11" Margin="0,0,20,0"
Height="{Binding ActualHeight, Source={x:Reference ProxyElement}}"
Style="{StaticResource AnfasserStil}" Cursor="Hand">
<Rectangle.RenderTransform>
<TranslateTransform X="-5" Y="0"/>
</Rectangle.RenderTransform>
</Rectangle>
<Label Style="{StaticResource LabelStil}" Content="{Binding Linealposition}"/>
</Grid>
</ControlTemplate>
</Thumb.Template>
</Thumb>
</Canvas>
<!--#endregion-->
</Grid>
</UserControl>
I am just testing
<CheckBox Grid.Column="4" MinWidth="40" IsChecked="{Binding Status, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" Margin="5,0,0,0"/>
This is the user control for the child page
<UserControl x:Class="Demo.View.Dashboard"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:local="clr-namespace:Demo.View"
xmlns:vm="clr-namespace:Demo.ViewModel"
xmlns:dt="clr-namespace:DefectTracking;assembly=DefectTrackingControl"
mc:Ignorable="d"
d:DesignHeight="900" d:DesignWidth="1600"
>
<UserControl.DataContext>
<vm:DashboardViewModel/>
</UserControl.DataContext>
<UserControl.Resources>
<vm:BindingProxy x:Key="proxy" Data="{Binding}"/>
<dt:Prüfung x:Key="www"/>
</UserControl.Resources>
<Grid Background="White">
<dt:DefectTrace Margin="0,0,-321,-91">
<dt:DefectTrace.Prüfungen>
<dt:Prüfung
Status="{Binding Path=status}" />
<dt:Prüfung Name="Stabseite" />
<dt:Prüfung Name="Stosskappe" />
<dt:Prüfung Name="Druckbild"
/>
<dt:Prüfung Name="Oberfläche"
/>
</dt:DefectTrace.Prüfungen>
</dt:DefectTrace>
<CheckBox IsChecked="{Binding state, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" Margin="100,100,100,10">Test check box</CheckBox>
</Grid>
</UserControl>
Property definition which I want to bind with checkbox but it's not propagating into a user control. If I just set true and false then it works but if I bind then it doesn't work.
Any help would be highly appreciated

I believe the problem here is
<UserControl.DataContext>
<vm:DashboardViewModel/>
</UserControl.DataContext>
because that basically means using a new instance of DashboardViewModel for this particular view, so I would assume that in your code somewhere you are using a different instance of this view model in which changing the value of Status does not really matter.
If the reason is what I think it is and you want to enhance your user comfort while developing XAML files and using this to help the compiler to know the types you can use the d:DataContext something like:
d:DataContext={x:Type vm:DashboardViewModel}

Resize Image inside Grid to always fit available space

I got a usercontrol containing two grids (top and bottom) and a Gridsplitter in between. The bottom grid will display an image for the selected item of the top grid (somewhat a details view).
I want to achieve the image to always fit the available space in the bottom grid, but the Stretch property of the image control doesn't work as i would expect it to. Can anyone help?
<UserControl x:Class="Picker"
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"
xmlns:dxmvvm="http://schemas.devexpress.com/winfx/2008/xaml/mvvm"
xmlns:dxprg="http://schemas.devexpress.com/winfx/2008/xaml/propertygrid"
xmlns:views="clr-
xmlns:dx="http://schemas.devexpress.com/winfx/2008/xaml/core"
mc:Ignorable="d"
x:Name="mainWindow">
<UserControl.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="Resources/HintResources.xaml"/>
</ResourceDictionary.MergedDictionaries>
<dx:BoolToVisibilityConverter x:Key="BoolToVisibilityConverter" />
<functionPicker:StringToImageSourceConverter x:Key="StringToImageSourceConverter" />
</ResourceDictionary>
</UserControl.Resources>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height ="600" MinHeight="200"/>
<RowDefinition Height ="15"/>
<RowDefinition Height ="400" MinHeight="100"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width ="700"/>
</Grid.ColumnDefinitions>
<-- content top grid -->
</Grid>
<!--Horizontal Grid Splitter-->
<GridSplitter Grid.Row="1" Height="10" HorizontalAlignment="Stretch" VerticalAlignment="Center"/>
<Label Grid.Row="1" BorderBrush="DarkGray" BorderThickness="1" Height="11" Background="#FFDDDDDD" IsHitTestVisible="False"/>
<Label Grid.Row="1" Content="...." FontSize="18" Height="42" FontWeight="Bold" HorizontalAlignment="Center" VerticalAlignment="Center" IsHitTestVisible="False" Background="Transparent" Foreground="Gray"/>
<Grid Grid.Row="2">
<Grid.RowDefinitions>
<RowDefinition Height ="*"/>
<RowDefinition Height ="Auto" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width ="*"/>
<ColumnDefinition Width ="Auto"/>
<ColumnDefinition Width ="Auto"/>
<ColumnDefinition Width ="Auto"/>
</Grid.ColumnDefinitions>
<TabControl Grid.Row="0" Grid.Column="0" Grid.ColumnSpan="4" ItemsSource="{Binding DetailViewModels}">
<TabControl.ItemTemplate>
<DataTemplate>
<TextBlock Text="{Binding Name}" />
</DataTemplate>
</TabControl.ItemTemplate>
<TabControl.Resources>
<DataTemplate DataType="{x:Type provider:PreviewPageViewModel}">
<Grid Background="White">
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<Image Source="{Binding PreviewPicturePath, Converter={StaticResource StringToImageSourceConverter}}"
Stretch="Uniform"
StretchDirection="DownOnly"
Grid.Row="0"
Visibility="{Binding PicturePathValid, Converter={StaticResource BoolToVisibilityConverter}}" />
</Grid>
</DataTemplate>
<DataTemplate DataType="{x:Type provider:CodePageViewModel}">
<TextBlock Text="{Binding SourceCode}"></TextBlock>
</DataTemplate>
</TabControl.Resources>
</TabControl>
<Button Grid.Row="1" Grid.Column="3" Margin="5" MinWidth="85" Height="25" Content="{x:Static fpProperties:Resources.CloseButton}" Command="{Binding CancelCommand}" CommandParameter="{Binding ElementName=mainWindow}" Visibility="{Binding Path=IsFuntionViewer, Converter={StaticResource BoolToVisibilityConverter}}"/>
</Grid>

UserControl's image not show on MainPage

I create a UserControl that contains a static image and I want to display it on my MainPage. However, the image only displays on my UserControl without displaying on MainPage.
This is my UserControl XAML:
<UserControl
x:Class="Example.Views.UserControls.Gift.GiftView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:Example.Views.UserControls.Gift"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d">
<Grid x:Name="RootLayout">
<Grid.RowDefinitions>
<RowDefinition Height="*"/>
<RowDefinition Height="90"/>
</Grid.RowDefinitions>
<Border Grid.Row="1" Background="#dedede">
<StackPanel Orientation="Horizontal" HorizontalAlignment="Center">
<Grid HorizontalAlignment="Stretch">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Button Grid.Column="0" HorizontalAlignment="Stretch">
<Button.Template>
<ControlTemplate >
<Grid Background="{Binding FleetTabColor}">
<Grid.RowDefinitions>
<RowDefinition Height="*"></RowDefinition>
<RowDefinition Height="Auto"></RowDefinition>
</Grid.RowDefinitions>
<Image Height="40" Width="40" Source="../Assets/Icon/unselect_gift.png" VerticalAlignment="Center" />
<TextBlock Foreground="Black" Margin="0" Grid.Row="1" FontSize="12" HorizontalAlignment="Center" VerticalAlignment="Center" Text="Gift"/>
</Grid>
</ControlTemplate>
</Button.Template>
</Button>
<Button Grid.Column="1" HorizontalAlignment="Stretch" >
<Button.Template>
<ControlTemplate >
<Grid Background="{Binding FleetTabColor}">
<Grid.RowDefinitions>
<RowDefinition Height="*"></RowDefinition>
<RowDefinition Height="Auto"></RowDefinition>
</Grid.RowDefinitions>
<Image Height="40" Width="40" Source="../Assets/birthday.png" VerticalAlignment="Center" />
<TextBlock Foreground="Black" Margin="0" Grid.Row="1" FontSize="12" HorizontalAlignment="Center" VerticalAlignment="Center" Text="BirthDay"/>
</Grid>
</ControlTemplate>
</Button.Template>
</Button>
<Button Grid.Column="2" HorizontalAlignment="Stretch">
<Button.Template>
<ControlTemplate >
<Grid Background="{Binding FleetTabColor}">
<Grid.RowDefinitions>
<RowDefinition Height="*"></RowDefinition>
<RowDefinition Height="Auto"></RowDefinition>
</Grid.RowDefinitions>
<Image Height="40" Width="40" Source="../Assets/package.png" VerticalAlignment="Center" />
<TextBlock Foreground="Black" Margin="0" Grid.Row="1" FontSize="12" HorizontalAlignment="Center" VerticalAlignment="Center" Text="Package"/>
</Grid>
</ControlTemplate>
</Button.Template>
</Button>
</Grid>
</StackPanel>
</Border>
</Grid>
</UserControl>
And this is my MainPage XAML:
<Page
x:Class="Example.MainPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:Example"
xmlns:menu="using:Example.Views.UserControls.Menu"
xmlns:popup="using:Example.Views.UserControls.Popup"
xmlns:giftview="using:Example.Views.UserControls.Gift"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
<Grid x:Name="Root">
<Grid Background="#FFCFD4E2">
<Grid Visibility="Visible">
<giftview:GiftView x:Name="GiftViewTest" DataContext="{Binding GiftViewModel}"/>
</Grid>
</Grid>
</Grid>
</Page>
When I try to clear my project, the image will shows correctly on my MainPage Preview. But when I rebuild my project, it will disappears on my preview again.
How can I do this?

Almost certainly your image cannot be found at runtime.
You'll need to check your project outputs to make sure the assets are in the correct folder.
More than likely you should use resources to access the images: see this other stackoverflow question
Example User Control that works as expected:
<UserControl x:Class="WpfApp1.UserControl1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
mc:Ignorable="d">
<StackPanel Orientation="Vertical">
<Button>
<Button.Template>
<ControlTemplate>
<Grid>
<Image Height="20" Width="40" Source="http://lorempixel.com/400/200/" />
</Grid>
</ControlTemplate>
</Button.Template>
</Button>
<Button>
<Button.Template>
<ControlTemplate>
<Grid>
<Image Height="20" Width="40" Source="sample-image.jpg" />
</Grid>
</ControlTemplate>
</Button.Template>
</Button>
</StackPanel>
</UserControl>
Project:

Black Background occurs when using microsoft.windows.shell

I am using the microsoft.windows.shell to customize my wpf window chrome. Everything is fine until I added a datagrid. The problem is that the appearance of the window become black sometimes. This situation does not happen constantly! Sometimes it looks fine but sometimes it has a black background.
Here is my xaml code:
<Window x:Class="CodeGeneratorWpf.Config"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="Config" Height="300" Width="300" Style="{StaticResource MainWindowStyle}"
WindowStartupLocation="CenterOwner" Loaded="Window_Loaded">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="*"/>
<RowDefinition Height="40"/>
</Grid.RowDefinitions>
<DataGrid Name="dataGrid" Grid.Row="0" ItemsSource="{Binding data}"
AlternatingRowBackground="{StaticResource {x:Static SystemColors.ControlBrushKey}}"
ClipToBounds="True" VerticalGridLinesBrush="{DynamicResource {x:Static SystemColors.ControlLightBrushKey}}"
HorizontalGridLinesBrush="{DynamicResource {x:Static SystemColors.ControlLightBrushKey}}"
LoadingRow="dataGrid_LoadingRow">
<DataGrid.RowHeaderTemplate>
<DataTemplate>
<TextBlock Text="{Binding RelativeSource={RelativeSource AncestorType=DataGridRow},
Path=Header}"/>
</DataTemplate>
</DataGrid.RowHeaderTemplate>
</DataGrid>
<Grid Grid.Row="1">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Button Name="btnSave" Grid.Column="0" Content="Save" Style="{StaticResource EmphasizeButton}" HorizontalAlignment="Stretch" Margin="25,5,25,5" Click="btnSave_Click"/>
<Button Name="btnCancel" Grid.Column="1" Content="Cancel" Style="{StaticResource NormalButton}" Margin="25,5,25,5" Click="btnCancel_Click"/>
</Grid>
</Grid>
</Window>
The MainWindowStyle:
<!--Captions Buttons to control the window borderless-->
<DockPanel Grid.Row="0">
<DockPanel.Background>
<SolidColorBrush Color="#FF5D91DC"></SolidColorBrush>
</DockPanel.Background>
<Image Name="imgTitle" Source="{TemplateBinding Icon}" DockPanel.Dock="Left" Margin="5"></Image>
<Label Content="{TemplateBinding Title}" Foreground="White"></Label>
<ctrl:CaptionButtons Margin="0,0,0,0" Grid.Row="0" HorizontalAlignment="Right" Type="Full"
Foreground="{DynamicResource CaptionButtonColor}" FontSize="14" MarginButton="0,0,5,0"
VerticalAlignment="Center" shell:WindowChrome.IsHitTestVisibleInChrome="True">
</ctrl:CaptionButtons>
</DockPanel>
<ContentPresenter Margin="0" Grid.Row="1" Content="{TemplateBinding Content}"/>
</Grid>
</Border>
</ControlTemplate>
<Style x:Key="MainWindowStyle" TargetType="{x:Type Window}">
<Setter Property="shell:WindowChrome.WindowChrome">
<Setter.Value>
<shell:WindowChrome
ResizeBorderThickness="6"
CaptionHeight="25"
CornerRadius="0"
GlassFrameThickness="0,0,0,1" />
</Setter.Value>
</Setter>
<Setter Property="Template" Value="{StaticResource MainWindowControlTemplate}"/>
</Style>
Can I get some help?

Grid Border / Gap between cells

I've created a ControlTemplate that contains a Grid with two rows.
Sadly, there appears to be a single pixel gap between the cells.
How do I remove the gap?
Here's a screenshot showing the gap:
...and here's the XAML:
<Window x:Class="MAQButtonTest.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="695" Width="996">
<Window.Resources>
<Style TargetType="TextBlock">
<Setter Property="OverridesDefaultStyle" Value="True"/>
</Style>
<ControlTemplate TargetType="Button" x:Key="ButtonTemplate">
<Grid Width="444" Margin="0" ShowGridLines="False">
<Grid.RowDefinitions>
<RowDefinition Height="51" />
<RowDefinition Height="36" />
</Grid.RowDefinitions>
<Grid Grid.Row="0" Background="#286c97">
<TextBlock>This is the first piece of text</TextBlock>
</Grid>
<Grid Grid.Row="1" Background="#5898c0">
<ContentPresenter Grid.Row="0" />
</Grid>
</Grid>
</ControlTemplate>
</Window.Resources>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="300" />
<ColumnDefinition />
</Grid.ColumnDefinitions>
<Grid Grid.Column="0" Background="#e9f1f6"></Grid>
<Grid Grid.Column="1" Background="#d2e3ed">
<StackPanel>
<TextBlock FontFamily="Segoe UI" FontSize="22" FontWeight="Medium" Margin="52,58,0,0" Foreground="#0c3d5d">Your Quizzes <TextBlock FontFamily="Segoe UI" FontSize="18" FontWeight="Medium" Foreground="#0c3d5d">(7)</TextBlock></TextBlock>
<Grid Margin="0,20,0,0">
<Button Width="444" Background="{x:Null}" BorderThickness="0" Template="{StaticResource ButtonTemplate}" Click="DoSomething" BorderBrush="#032135">
<TextBlock Margin="6,2.8,0,0" FontFamily="Segoe UI" FontSize="19" Foreground="#032135" FontWeight="Medium">This is a second piece of text</TextBlock>
</Button>
</Grid>
</StackPanel>
</Grid>
</Grid>
</Window>

Just add SnapsToDevicePixels="True" in your template grid
<ControlTemplate TargetType="Button" x:Key="ButtonTemplate">
<Grid Width="444" Margin="0" ShowGridLines="False" SnapsToDevicePixels="True">
<Grid.RowDefinitions>
<RowDefinition Height="51" />
<RowDefinition Height="36" />
</Grid.RowDefinitions>
<Grid Grid.Row="0" Background="#286c97">
<TextBlock>This is the first piece of text</TextBlock>
</Grid>
<Grid Grid.Row="1" Background="#5898c0">
<ContentPresenter Grid.Row="0" />
</Grid>
</Grid>
</ControlTemplate>

Set
SnapsToDevicePixels="True"
On grids in template or button, but better just create new style with SnapsToDevicePixels="True" setter and template inside style.