Develop Reference

WPF Itemcontrol datatemplate

I'm new in WPF and I can not work this one out hope you guys could help on this. The problem is that the DesignerItemTemplate is not working when its in the item control, I have try to use this directly to one item I can drag it around. Forgive me if the code look messy. Thanks in advance
<UserControl.Resources>
<ControlTemplate x:Key="MoveThumbTemplate" TargetType="{x:Type s:MoveThumb}">
<Rectangle Fill="Transparent" />
</ControlTemplate>
<!-- ResizeDecorator Template -->
<ControlTemplate x:Key="ResizeDecoratorTemplate" TargetType="{x:Type Control}">
<Grid>
<StackPanel VerticalAlignment="Top" HorizontalAlignment="Left" Height="15" Width="130" Margin="0,-15,-81,0" IsHitTestVisible="False">
<TextBox Text="R101" BorderBrush="Transparent" IsHitTestVisible="False" Background="Transparent" Height="17" FontSize="7" Foreground="#FF6DF90C" VerticalContentAlignment="Stretch" MinHeight="1" HorizontalAlignment="Stretch" CharacterCasing="Upper" />
</StackPanel>
<s:ResizeThumb Height="1" Cursor="SizeNS" BorderBrush="#FF160DCD" BorderThickness="1"
VerticalAlignment="Top" HorizontalAlignment="Stretch"/>
<s:ResizeThumb Width="1" Cursor="SizeWE" BorderBrush="#FF160DCD" BorderThickness="1"
VerticalAlignment="Stretch" HorizontalAlignment="Left"/>
<s:ResizeThumb Width="1" Cursor="SizeWE" BorderBrush="#FF160DCD" BorderThickness="1"
VerticalAlignment="Stretch" HorizontalAlignment="Right"/>
<s:ResizeThumb Height="1" Cursor="SizeNS" BorderBrush="#FF160DCD" BorderThickness="1"
VerticalAlignment="Bottom" HorizontalAlignment="Stretch"/>
<s:ResizeThumb Width="2" Height="2" Cursor="SizeNWSE" BorderBrush="#FF81F110" BorderThickness="1"
VerticalAlignment="Top" HorizontalAlignment="Left"/>
<s:ResizeThumb Width="2" Height="2" Cursor="SizeNESW" BorderBrush="#FF81F110" BorderThickness="1"
VerticalAlignment="Top" HorizontalAlignment="Right"/>
<s:ResizeThumb Width="2" Height="2" Cursor="SizeNESW" BorderBrush="#FF81F110" BorderThickness="1"
VerticalAlignment="Bottom" HorizontalAlignment="Left"/>
<s:ResizeThumb Width="2" Height="2" Cursor="SizeNWSE" BorderBrush="#FF81F110" BorderThickness="1"
VerticalAlignment="Bottom" HorizontalAlignment="Right"/>
</Grid>
</ControlTemplate>
<!-- Designer Item Template-->
<ControlTemplate x:Key="DesignerItemTemplate" TargetType="{x:Type ContentControl}">
<Grid DataContext="{Binding RelativeSource={RelativeSource TemplatedParent}}">
<s:MoveThumb Template="{StaticResource MoveThumbTemplate}" Cursor="SizeAll"/>
<Control Template="{StaticResource ResizeDecoratorTemplate}"/>
<ContentPresenter Content="{TemplateBinding Content}"/>
</Grid>
</ControlTemplate>
</UserControl.Resources>
<panZoom:PanAndZoomViewer x:Name="panZoomViewer" Margin="2,2,2,45" ClipToBounds="True">
<!--<Canvas>-->
<Canvas x:Name="cnvImage" Background="Transparent">
<Image x:Name="imgCurrent" VerticalAlignment="Center" HorizontalAlignment="Center" />
<ItemsControl ItemsSource="{Binding InspectionItemList,Mode=TwoWay }">
<ItemsControl.ItemTemplate>
<DataTemplate>
<ContentControl Canvas.Top="{Binding Y,Mode=TwoWay}" Canvas.Left="{Binding X,Mode=TwoWay }"
Width="{Binding Width,Mode=TwoWay}" MinWidth="1"
Height="{Binding Height,Mode=TwoWay}" MinHeight="1"
Template="{Binding Mode=OneWay, Source={StaticResource DesignerItemTemplate}}" />
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
</Canvas>
<!--</Canvas>-->
</panZoom:PanAndZoomViewer>

Instead of Template="{Binding Mode=OneWay, Source={StaticResource DesignerItemTemplate}}" /> try this:
Template="{StaticResource DesignerItemTemplate}" />
If this doesn't help, could you please provide a little simpler example which demonstrates the problem and describe what you want to achive. It's not clear to me what you want to achive.

I found the problem! It was the InspectionItemList collection object that inheriting to a observable object. when I removed the obeservable in the object it works perfectly. Thanks Clemens and Stackoverflow this site really helps me a lot.

C# wpf failed to create an instance of custom control

They say, A Picture is Worth a Thousand Words.
I have a custom control called RichTextBoxEditor:
Here is the XAML:
<UserControl x:Class="WpfRichText.Ex.Controls.RichTextEditor" x:Name="uxRichTextEditor"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:asis="clr-namespace:WpfRichText.Ex.AttachedProperties">
<Grid >
<!-- Set the styles for the tool bar. -->
<Grid.Resources>
<Style TargetType="{x:Type Button}" x:Key="formatTextStyle">
<Setter Property="FontFamily" Value="Palatino Linotype"></Setter>
<Setter Property="Width" Value="30"></Setter>
<Setter Property="FontSize" Value ="14"></Setter>
<Setter Property="CommandTarget" Value="{Binding ElementName=mainRTB}"></Setter>
</Style>
<Style TargetType="{x:Type ToggleButton}" x:Key="formatTextStyle2">
<Setter Property="FontFamily" Value="Palatino Linotype"></Setter>
<Setter Property="Width" Value="30"></Setter>
<Setter Property="FontSize" Value ="14"></Setter>
<!--<Setter Property="CommandTarget" Value="{Binding ElementName=mainRTB}"></Setter>-->
</Style>
<Style TargetType="{x:Type Button}" x:Key="formatImageStyle">
<Setter Property="Width" Value="30"></Setter>
<!--<Setter Property="CommandTarget" Value="{Binding ElementName=mainRTB}"></Setter>-->
</Style>
</Grid.Resources>
<DockPanel Name="mainPanel">
<!-- This tool bar contains all the editing buttons. -->
<ToolBar Height="30" DockPanel.Dock="Top" ToolBarTray.IsLocked="True">
<Button Style="{StaticResource formatTextStyle}" Command="EditingCommands.ToggleBold" ToolTip="Bold">
<TextBlock FontWeight="Bold">B</TextBlock>
</Button>
<Button Style="{StaticResource formatTextStyle}" Command="EditingCommands.ToggleItalic" ToolTip="Italic">
<TextBlock FontStyle="Italic" FontWeight="Bold">I</TextBlock>
</Button>
<ToggleButton Style="{StaticResource formatTextStyle2}" x:Name="ToolStripButtonStrikeout" ToolTip="Strikethrough" Click="ToolStripButtonStrikeout_Click" Foreground="Black" Width="19" Height="19">
<ToggleButton.Background>
<ImageBrush ImageSource="pack://siteoforigin:,,,/Resources/Strikeout.png"/>
</ToggleButton.Background>
</ToggleButton>
<Button x:Name="Tool_Link" Style="{StaticResource formatImageStyle}" ToolTip="Link" Click="Tool_Link_Click" Width="30" Height="19">
<Button.Background>
<ImageBrush Stretch="Uniform" ImageSource="pack://siteoforigin:,,,/Resources/Link.png"/>
</Button.Background>
</Button>
<Button x:Name="Tool_Spoiler" Style="{StaticResource formatImageStyle}" ToolTip="Spoiler" Width="30" Height="19">
<Button.Background>
<ImageBrush Stretch="Uniform" ImageSource="pack://siteoforigin:,,,/Resources/Spoiler.png"/>
</Button.Background>
</Button>
<Button x:Name="Tool_Image" Style="{StaticResource formatImageStyle}" ToolTip="Image" Height="19">
<Button.Background>
<ImageBrush ImageSource="pack://siteoforigin:,,,/Resources/Images.png" Stretch="Uniform"/>
</Button.Background>
</Button>
<Button x:Name="Tool_Video" Style="{StaticResource formatImageStyle}" ToolTip="Youtube video" Margin="0,1,0,-1" Height="19">
<Button.Background>
<ImageBrush ImageSource="pack://siteoforigin:,,,/Resources/Video.png" Stretch="Uniform"/>
</Button.Background>
</Button>
<Button x:Name="Tool_ALeft" Style="{StaticResource formatImageStyle}" ToolTip="Align Left" Height="19" Width="30">
<Button.Background>
<ImageBrush ImageSource="pack://siteoforigin:,,,/Resources/paragraphleftjustify.png" Stretch="Uniform"/>
</Button.Background>
</Button>
<Button x:Name="Tool_ACenter" Style="{StaticResource formatImageStyle}" ToolTip="Align Center" Height="19">
<Button.Background>
<ImageBrush Stretch="Uniform" ImageSource="pack://siteoforigin:,,,/Resources/paragraphcenterjustify.png"/>
</Button.Background>
</Button>
<Button x:Name="Tool_Header" Style="{StaticResource formatImageStyle}" ToolTip="Header" Height="19">
<Button.Background>
<ImageBrush Stretch="Uniform" ImageSource="pack://siteoforigin:,,,/Resources/charactergrowfont.png"/>
</Button.Background>
</Button>
<Button x:Name="Tool_Quote" Style="{StaticResource formatImageStyle}" ToolTip="Quote" Height="19">
<Button.Background>
<ImageBrush Stretch="Uniform" ImageSource="pack://siteoforigin:,,,/Resources/quote.png"/>
</Button.Background>
</Button>
<Button x:Name="Tool_Code" Style="{StaticResource formatImageStyle}" ToolTip="Decrease Indent" Height="19">
<Button.Background>
<ImageBrush Stretch="Uniform" ImageSource="pack://siteoforigin:,,,/Resources/code.png"/>
</Button.Background>
</Button>
</ToolBar>
<StackPanel >
<RichTextBox Name="mainRTB" AcceptsTab="True" Height="160"
asis:RichTextboxAssistant.BoundDocument="{Binding Path=Text, ElementName=uxRichTextEditor}"
VerticalScrollBarVisibility="Visible" Width="365" />
<!--<TextBox Text="{Binding Path=Text, ElementName=uxRichTextEditor}" Height="25" />-->
</StackPanel>
</DockPanel>
</Grid>
This control originally was taken from the net, which i forgot where it is. But then i modified some component of it. It was fine while in Designer, but when i put it on the main window, it will look like this:
Here is some information that may useful:
Thanks in Advance :)
EDIT:
Here is the original XAML:
<UserControl
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:RTFEditor="clr-namespace:RTFEditor"
mc:Ignorable="d"
x:Class="RTFEditor.RTFBox"
x:Name="RTFEditor"
d:DesignWidth="600" d:DesignHeight="600" Loaded="RTFEditor_Loaded">
<UserControl.Resources>
<ObjectDataProvider x:Key="FontListKlasse" d:IsDataSource="True" ObjectType="{x:Type RTFEditor:FontList}"/>
<ObjectDataProvider x:Key="FontHeightKlasse" d:IsDataSource="True" ObjectType="{x:Type RTFEditor:FontHeight}"/>
</UserControl.Resources>
<DockPanel>
<ToolBar x:Name="ToolBarOben" DockPanel.Dock="Top">
<Button x:Name="ToolStripButtonOpen" Click="ToolStripButtonOpen_Click">
<Image Source="Images\Open.png" Stretch="None"/>
</Button>
<Button x:Name="ToolStripButtonPrint" Click="ToolStripButtonPrint_Click">
<Image Source="Images\Print.png" Stretch="None"/>
</Button>
<Separator/>
<Button x:Name="ToolStripButtonCut" Command="ApplicationCommands.Cut" ToolTip="Cut">
<Image Source="Images\Cut.png" Stretch="None"/>
</Button>
<Button x:Name="ToolStripButtonCopy" Command="ApplicationCommands.Copy" ToolTip="Copy">
<Image Source="Images\Copy.png" Stretch="None"/>
</Button>
<Button x:Name="ToolStripButtonPaste" Command="ApplicationCommands.Paste" ToolTip="Paste">
<Image Source="Images\Paste.png" Stretch="None"/>
</Button>
<Button x:Name="ToolStripButtonUndo" Command="ApplicationCommands.Undo" ToolTip="Undo">
<Image Source="Images\Undo.png" Stretch="None"/>
</Button>
<Button x:Name="ToolStripButtonRedo" Command="ApplicationCommands.Redo" ToolTip="Redo">
<Image Source="Images\Redo.png" Stretch="None"/>
</Button>
<Separator/>
<ComboBox x:Name="Fonttype" ItemsSource="{Binding Mode=OneWay, Source={StaticResource FontListKlasse}}" DropDownClosed="Fonttype_DropDownClosed" />
<ComboBox x:Name="Fontheight" ItemsSource="{Binding Mode=OneWay, Source={StaticResource FontHeightKlasse}}" DropDownClosed="Fontheight_DropDownClosed" />
</ToolBar>
<ToolBar x:Name="ToolBarUnten" DockPanel.Dock="Top">
<ToggleButton x:Name="ToolStripButtonBold" Command="EditingCommands.ToggleBold" ToolTip="Bold">
<Image Source="Images\Bold.png" Stretch="None"/>
</ToggleButton>
<ToggleButton x:Name="ToolStripButtonItalic" Command="EditingCommands.ToggleItalic" ToolTip="Italic">
<Image Source="Images\Italic.png" Stretch="None"/>
</ToggleButton>
<ToggleButton x:Name="ToolStripButtonUnderline" Command="EditingCommands.ToggleUnderline" ToolTip="Underline">
<Image Source="Images\Underline.png" Stretch="None"/>
</ToggleButton>
<ToggleButton x:Name="ToolStripButtonStrikeout" ToolTip="Strikeout" Click="ToolStripButtonStrikeout_Click">
<Image Source="Images\Strikeout.png" Stretch="None"/>
</ToggleButton>
<Separator/>
<Button x:Name="ToolStripButtonTextcolor" Click="ToolStripButtonTextcolor_Click">
<Image Source="Images\Textcolor.png" Stretch="None"/>
</Button>
<Button x:Name="ToolStripButtonBackcolor" Click="ToolStripButtonBackcolor_Click">
<Image Source="Images\Backcolor.png" Stretch="None"/>
</Button>
<Separator/>
<ToggleButton x:Name="ToolStripButtonAlignLeft" Command="EditingCommands.AlignLeft" ToolTip="Align Left" Click="ToolStripButtonAlignLeft_Click">
<Image Source="Images\AlignLeft.png" Stretch="None"/>
</ToggleButton>
<ToggleButton x:Name="ToolStripButtonAlignCenter" Command="EditingCommands.AlignCenter" ToolTip="Align Center" Click="ToolStripButtonAlignCenter_Click">
<Image Source="Images\AlignCenter.png" Stretch="None"/>
</ToggleButton>
<ToggleButton x:Name="ToolStripButtonAlignRight" Command="EditingCommands.AlignRight" ToolTip="Align Right" Click="ToolStripButtonAlignRight_Click">
<Image Source="Images\AlignRight.png" Stretch="None"/>
</ToggleButton>
<Separator/>
<Button x:Name="ToolStripButtonBulletList" Command="EditingCommands.ToggleBullets" ToolTip="Bullets">
<Image Source="Images\BulletList.png" Stretch="None"/>
</Button>
<Button x:Name="ToolStripButtonNumbersList" Command="EditingCommands.ToggleNumbering" ToolTip="Numbers">
<Image Source="Images\NumbersList.png" Stretch="None"/>
</Button>
<Separator/>
<Button x:Name="ToolStripButtonIndent" Command="EditingCommands.IncreaseIndentation" ToolTip="Increase Indent">
<Image Source="Images\Indent.png" Stretch="None"/>
</Button>
<Button x:Name="ToolStripButtonIndentDelete" Command="EditingCommands.DecreaseIndentation" ToolTip="Decrease Indent">
<Image Source="Images\IndentRemove.png" Stretch="None"/>
</Button>
<Separator/>
<ToggleButton x:Name="ToolStripButtonSubscript" ToolTip="Subscript" Click="ToolStripButtonSubscript_Click">
<Image Source="Images\Subscript.png" Stretch="None"/>
</ToggleButton>
<ToggleButton x:Name="ToolStripButtonSuperscript" ToolTip="Superscript" Click="ToolStripButtonSuperscript_Click">
<Image Source="Images\Superscript.png" Stretch="None"/>
</ToggleButton>
</ToolBar>
<StatusBar x:Name="StatusBar" DockPanel.Dock="Bottom">
<StatusBarItem>
<Label x:Name="LabelZeileNr" Content="ZeileNr" BorderThickness="1" BorderBrush="DarkGray" />
</StatusBarItem>
<StatusBarItem >
<Label x:Name="LabelSpalteNr" Content="SpalteNr" BorderThickness="1" BorderBrush="DarkGray"/>
</StatusBarItem>
<StatusBarItem>
<Label x:Name="LabelEinfg" Content="Einfg" BorderThickness="1" BorderBrush="DarkGray" />
</StatusBarItem>
<StatusBarItem DockPanel.Dock="Right" Width="100">
<Slider x:Name="SliderZoom" Grid.Column="1" Width="100" Ticks="1, 2, 3, 4, 5, 6, 7, 8, 9, 10" Value="1" Delay="100" Interval="5" TickPlacement="BottomRight" Minimum="1" Maximum="10" ValueChanged="SliderZoom_ValueChanged" HorizontalContentAlignment="Left" />
</StatusBarItem>
</StatusBar>
<RichTextBox x:Name="RichTextControl" SpellCheck.IsEnabled="True" VerticalScrollBarVisibility="Auto" AcceptsReturn="True" AcceptsTab="True" SelectionChanged="RichTextControl_SelectionChanged" TextChanged="RichTextControl_TextChanged" KeyDown="RichTextControl_KeyDown" KeyUp="RichTextControl_KeyUp" />
</DockPanel>
EDIT 2nd:
If im not mistaken here is what i have done:
Added my custom images to the project resource (Linked at compile; Resource)
Changed the source of the image of each button (Except Bold & Italic)
I will update this section if i remember anything else!
More Info:
I tried to copy-paste the original XAML without modifying it. When i use it in the main window, it works! But, all images of the buttons are not showing (except Bold and Italic since they dont use any image).
RichTextEditor.xaml.cs :
namespace WpfRichText.Ex.Controls
{
/// <summary>
/// Interaction logic for BindableRichTextbox.xaml
/// </summary>
public partial class RichTextEditor : UserControl
{
public static readonly DependencyProperty TextProperty =
DependencyProperty.Register("Text", typeof(string), typeof(RichTextEditor),
new PropertyMetadata(string.Empty));
public RichTextEditor()
{
InitializeComponent();
}
public string Text
{
get { return GetValue(TextProperty) as string; }
set {
SetValue(TextProperty, value);
}
}
private void ToolStripButtonStrikeout_Click(object sender, RoutedEventArgs e)
{
TextRange range = new TextRange(mainRTB.Selection.Start, mainRTB.Selection.End);
TextDecorationCollection tdc = (TextDecorationCollection)mainRTB.Selection.GetPropertyValue(Inline.TextDecorationsProperty);
if (tdc == null || !tdc.Equals(TextDecorations.Strikethrough))
{
tdc = TextDecorations.Strikethrough;
}
else
{
tdc = new TextDecorationCollection();
}
range.ApplyPropertyValue(Inline.TextDecorationsProperty, tdc);
}
private void Tool_Link_Click(object sender, RoutedEventArgs e)
{
}
}
}

XAML design: drawing a line from button to button

I am trying to learn XAML and am creating a simple app based off this:
I have created the buttons for each of the circles, but where I am running into an issue is the drawing of the lines and autosizing them to the button positions. I was wondering if there is a way to bind the start/end point of a path to a button location? Is there a better way doing this in XAML?
Here is what my current XAML code is...
<Page
x:Class="PennyGame.GameControl"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:PennyGame"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d">
<Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
<Button Width="100" Height="100" Margin="540,133,0,535" Name="Button_Top1">
<Button.Template>
<ControlTemplate TargetType="Button">
<Grid>
<Ellipse Stroke="White" StrokeThickness="5" />
</Grid>
</ControlTemplate>
</Button.Template>
<Path Data="M49,100 L48,401" Fill="Gold" Height="302" Stretch="Fill" Stroke="Gold" UseLayoutRounding="False" Width="2"/>
</Button>
<Button Width="100" Height="100" Margin="725,133,0,535" Name="Button_Top2">
<Button.Template>
<ControlTemplate TargetType="Button">
<Grid>
<Ellipse Stroke="White" StrokeThickness="5" />
</Grid>
</ControlTemplate>
</Button.Template>
</Button>
<Button Width="100" Height="100" Margin="725,534,0,134" Name="Button_Bottom2">
<Button.Template>
<ControlTemplate TargetType="Button">
<Grid>
<Ellipse Stroke="White" StrokeThickness="5" />
</Grid>
</ControlTemplate>
</Button.Template>
</Button>
<Button Width="100" Height="100" Margin="540,534,0,134" Name="Button_Bottom1">
<Button.Template>
<ControlTemplate TargetType="Button">
<Grid>
<Ellipse Stroke="White" StrokeThickness="5" />
</Grid>
</ControlTemplate>
</Button.Template>
</Button>
<Button Width="100" Height="100" Margin="434,244,0,424" Name="Button_Left1">
<Button.Template>
<ControlTemplate TargetType="Button">
<Grid>
<Ellipse Stroke="White" StrokeThickness="5" />
</Grid>
</ControlTemplate>
</Button.Template>
</Button>
<Button Width="100" Height="100" Margin="434,423,0,245" Name="Button_Left2">
<Button.Template>
<ControlTemplate TargetType="Button">
<Grid>
<Ellipse Stroke="White" StrokeThickness="5" />
</Grid>
</ControlTemplate>
</Button.Template>
</Button>
<Button Width="100" Height="100" Margin="831,244,0,424" Name="Button_Right1">
<Button.Template>
<ControlTemplate TargetType="Button">
<Grid>
<Ellipse Stroke="White" StrokeThickness="5" />
</Grid>
</ControlTemplate>
</Button.Template>
</Button>
<Button Width="100" Height="100" Margin="831,423,0,245" Name="Button_Right2">
<Button.Template>
<ControlTemplate TargetType="Button">
<Grid>
<Ellipse Stroke="White" StrokeThickness="5" />
</Grid>
</ControlTemplate>
</Button.Template>
</Button>
<Path Data="M526,475 L826,475" Fill="White" Margin="534,0,539,292" Stretch="Uniform" Stroke="White" UseLayoutRounding="False" VerticalAlignment="Bottom" d:LayoutOverrides="LeftPosition, RightPosition" Height="10" />
<Path Data="M526,295 L826,295" Fill="White" Margin="534,294,538,0" Stretch="Uniform" Stroke="White" UseLayoutRounding="False" VerticalAlignment="Top" d:LayoutOverrides="LeftPosition, RightPosition" Height="2" />
<Path Data="M590,235 L590,535" Fill="White" Margin="590,233,0,233" Stretch="Uniform" Stroke="White" UseLayoutRounding="False" Width="2" d:LayoutOverrides="TopPosition, BottomPosition" HorizontalAlignment="Left" />
<Path Data="M775,235 L775,535" Fill="White" Margin="0,233,590,233" Stretch="Uniform" Stroke="White" UseLayoutRounding="False" Width="3" d:LayoutOverrides="TopPosition, BottomPosition" HorizontalAlignment="Right" />
<Path Data="M590,535 L826,295" Fill="White" Margin="590,294,539,238" Stretch="Uniform" Stroke="White" UseLayoutRounding="False" d:LayoutOverrides="LeftPosition, RightPosition, TopPosition, BottomPosition"/>
<Path Data="M775,535 L526,295" Fill="White" Margin="534,296,589,233" Stretch="Uniform" Stroke="White" UseLayoutRounding="False" d:LayoutOverrides="LeftPosition, RightPosition, TopPosition, BottomPosition"/>
<Path Data="M526,475 L775,235" Fill="White" Margin="534,233,589,291" Stretch="Uniform" Stroke="White" UseLayoutRounding="False" d:LayoutOverrides="LeftPosition, RightPosition, TopPosition, BottomPosition"/>
<Path Data="M590,235 L826,475" Fill="White" Margin="590,233,540,291" Stretch="Uniform" Stroke="White" UseLayoutRounding="False" d:LayoutOverrides="LeftPosition, RightPosition, TopPosition, BottomPosition"/>
</Grid>

If you stick to handle it in XAML using grids you can use a canvas for each button-line-button constellation.
I'd recommend to handle it in code.
See my example bellow.
I bound actual Canvas properties to each button and the connector line.
It should properly if you resize the container grid, or reposition your canvas.
RESULT:
CODE:
<Grid Width="300" Height="300">
<Canvas x:Name="lineCanvas1">
<Line x:Name="line" Fill="Green" Stroke="Green" UseLayoutRounding="False" X1="1" Y1="1" X2="{Binding ActualWidth, ElementName=lineCanvas1}" Y2="{Binding ActualHeight, ElementName=lineCanvas1}" />
<Button x:Name="button1" Content="Button One" HorizontalAlignment="Stretch" Margin="0" VerticalAlignment="Stretch" Background="Red" RenderTransformOrigin="1,1" Height="100" Width="100"/>
<Button x:Name="button2" Content="Button Two" HorizontalAlignment="Stretch" Margin="-100,-100,0,0" VerticalAlignment="Stretch" Background="Red" Canvas.Left="{Binding ActualWidth, ElementName=lineCanvas1}" Canvas.Top="{Binding ActualHeight, ElementName=lineCanvas1}" RenderTransformOrigin="1,1" Height="100" Padding="0" Width="100"/>
</Canvas>
</Grid>

How to use background image in grid view item xaml (metro app )

I want to use a background Image in gridview item.
I have tried this :
< <GridView x:Name="mainGrid" Margin="24.079,143,461.133,-533.627" SelectionChanged="gridSelection" RenderTransformOrigin="0.5,0.5" UseLayoutRounding="False" d:LayoutRounding="Auto" Height="530.627" VerticalAlignment="Top" Background="White" Grid.Column="1" >
<GridView.ItemContainerTransitions>
<TransitionCollection>
<EntranceThemeTransition />
<RepositionThemeTransition />
<ContentThemeTransition HorizontalOffset="200"/>
</TransitionCollection>
</GridView.ItemContainerTransitions>
<GridView.RenderTransform>
<CompositeTransform SkewX="0.186" TranslateX="0.743"/>
</GridView.RenderTransform>
<GridViewItem Width="250" Height="250" Style="{StaticResource gridBackground}" ScrollViewer.HorizontalScrollBarVisibility="Visible" Margin="0" >
</GridViewItem>
<GridViewItem Width="250" Height="250" Content="Send a test" Margin="0" Background="#FF3988BF" />
<GridViewItem Width="250" Height="250" Content="Edit a Newsletter" Background="#FF3988BF" />
<GridViewItem Width="250" Height="250" Content="Lists Contacts" Margin="0" Background="#FF3988BF" />
<GridViewItem Width="250" Height="250" Content="Images" Background="#FF3988BF" />
<GridViewItem Width="250" Height="250" Content="Send to Mailinglist" Background="#FF3988BF" />
</GridView> >
with this style:
<Style TargetType="GridViewItem" x:Key="gridBackground">
<Setter Property="Background">
<Setter.Value>
<ImageBrush ImageSource="../Assets/create.png"/>
</Setter.Value>
</Setter>
</Style>
The problem is that image is not showing as grid view item. What should I do?

wpf overlay an image to a mediaelement

I would show over a mediaelement, a classic image play and when the pointer enter on the mediaelement this image disappears.
The mediaelement is like this and this works well. I post a portion of code:
<toolkit:DataGrid.RowDetailsTemplate>
<DataTemplate x:Name="DataTemplateDgRows">
<Border HorizontalAlignment="Stretch" CornerRadius="5" Background="Black" Margin="5" Padding="5">
<StackPanel Orientation="Vertical">
<TextBlock Foreground="#509CD5" FontSize="20" Width="300" TextWrapping="Wrap" Text="{Binding NomeV}"/>
<Border BorderThickness="2" CornerRadius="2" BorderBrush="LightGray" >
<MediaElement Source="{Binding MediaUri}"
LoadedBehavior="Manual" Name="mediaElement1" ScrubbingEnabled="True"
Width="360" MouseLeftButtonDown="mediaElement1_MouseLeftButtonDown"
MouseEnter="mediaElement1_MouseEnter"
MouseLeave="mediaElement1_MouseLeave"
Loaded="mediaElement1_Loaded" />
</Border>
May someone can help me?
thanks

Something like this will get you started.
<toolkit:DataGrid.RowDetailsTemplate>
<DataTemplate x:Name="DataTemplateDgRows">
<Border HorizontalAlignment="Stretch" CornerRadius="5" Background="Black" Margin="5" Padding="5">
<StackPanel Orientation="Vertical">
<TextBlock Foreground="#509CD5" FontSize="20" Width="300" TextWrapping="Wrap" Text="{Binding NomeV}"/>
<Border BorderThickness="2" CornerRadius="2" BorderBrush="LightGray" >
<Grid>
<Image Grid.ZIndex="1"
x:Name="image1"
Source="YourSource"/>
<MediaElement Grid.ZIndex="0"
Source="{Binding MediaUri}"
LoadedBehavior="Manual" Name="mediaElement1" ScrubbingEnabled="True"
Width="360" MouseLeftButtonDown="mediaElement1_MouseLeftButtonDown"
MouseEnter="mediaElement1_MouseEnter"
MouseLeave="mediaElement1_MouseLeave"
Loaded="mediaElement1_Loaded" />
</Grid>
</Border>
</StackPanel>
</Border>
<DataTemplate.Triggers>
<Trigger SourceName="mediaElement1" Property="IsMouseOver" Value="True">
<Setter TargetName="image1" Property="Visibility" Value="Collapsed"/>
</Trigger>
</DataTemplate.Triggers>
</DataTemplate>
</DataGrid.RowDetailsTemplate>