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How to set button in side stackpanel to right edge in windows 10 universal app development

I an new to windows app development,i searched for this but not found any where.I need the button at right edge and Stretch the textbox till buttons start.But I am unable to set the button to Right edge.
How to acheve this.

A stackpanel works like a container. If you define layout properties on your stackpanel, then the objects inside your stackpanel cannot be displayed outside of the stackpanel's limits.
For example :
If I set my row and column number in my stackpanel,
<StackPanel Grid.Row="0" Grid.Column="2" Name="Version" Orientation="Horizontal" HorizontalAlignment="Right" VerticalAlignment="Top">
<Label Grid.Column="4" Grid.Row="6" Name="Ver" Content="V." HorizontalAlignment="Right" />
<TextBlock Name="Vers" Text="1.0" TextAlignment="Right" />
</StackPanel>
Then the row/column properties set on my label are ignored and the 'HorizontalAlignment="Right"' will place my label on the right side of the stackpanel, not the grid.
A solution may be to remove your button from your stackpanel, you are then free to place your button anywhere on the grid.
Another solution can be to expand your stackpanel's limits.
To do so, you can use the Grid.ColumnSpan property or simply set your stackpanel on the right of the grid.
Hope that helped.

Forcing a ListBox to re-render

Background:
I have a ListBox containing items defined by DataTemplates. Right now, if an object in the list has the property IsEditable set to true, the item's property information will be displayed inside of textboxes (via DataTemplate change), instead of textblocks (so the user can edit the content of that list item)
IsEditable is toggled on/off by a button inside of each list item. I have been told that we need to keep the state of all objects consistent, which means I can't just rebind the ItemsSource and lose everything.
Currently, I'm using this to re-render:
this.lbPoints.Dispatcher.Invoke(DispatcherPriority.Render, new Action(() => { }));
Question:
The aforementioned code snippet KIND OF does its job. By "kind of", I mean, it does eventually cause my data to become re-rendered, but only when I scroll to the bottom of the list and then scroll back up to the item i'm trying to re-render.
1) How can I re-render the data immediately without having to scroll around to get it to show up?

The guys commenting are right that you're going about this the wrong way... there is rarely a need to force a ListBox to re-render. You're probably causing yourself some additional grief trying to switch the DataTemplates (although it is possible). Instead of that, think about data binding the TextBox.IsReadOnly property to your IsEditable property:
<TextBox IsReadOnly="{Binding IsEditable}" Text="{Binding Text}" />
Another alternative is to use a BooleanToVisibilityConverter to show a different Grid in your DataTemplate when your IsEditable property is true. Unfortunately, that Converter doesn't have an inverse operation, so you could create an IsNotEditing property to bind to the Grid in the DataTemplate that is originally displayed. I'm not sure if that's clear... see this example:
<DataTemplate DataType="{x:Type YourPrefix:YourDataType}">
<Grid>
<Grid Visibility="{Binding IsNotEditing, Converter={StaticResource
BooleanToVisibilityConverter}}">
<!-- Define your uneditable UI here -->
</Grid>
<Grid Visibility="{Binding IsEditing, Converter={StaticResource
BooleanToVisibilityConverter}}">
<!-- Define your editable UI here -->
</Grid>
</Grid>
</DataTemplate>
You could also define your own BooleanToVisibilityConverter class that has an IsInverted property, so that you can just use the one IsEditing property. You'd need to declare two Converters still, like this:
<Converters:BoolToVisibilityConverter x:Key="BoolToVisibilityConverter" />
<Converters:BoolToVisibilityConverter x:Key="InvertedBoolToVisibilityConverter"
IsInverted="True" />
Then your XAML would be like this:
<Grid Visibility="{Binding IsEditing, Converter={StaticResource
InvertedBoolToVisibilityConverter}}">
<!-- Define your uneditable UI here -->
</Grid>
<Grid Visibility="{Binding IsEditing, Converter={StaticResource
BoolToVisibilityConverter}}">
<!-- Define your editable UI here -->
</Grid>

How to display a Button which hosts TextBlock with the style PhoneTextSubtleStyle?

I need to create a button with two lines of text:
The first one is Command Title like "Save"
The second one is a Description of the Command like "The application state will be saved"
So I have written the next xaml:
<Button Margin="0,128,0,0" Padding="10,5" HorizontalContentAlignment="Stretch" VerticalContentAlignment="Stretch">
<StackPanel Margin="0" UseLayoutRounding="False">
<TextBlock FontSize="{StaticResource PhoneFontSizeMediumLarge}" FontFamily="{StaticResource PhoneFontFamilySemiBold}">Save</TextBlock>
<TextBlock Style="{StaticResource PhoneTextSubtleStyle}" Margin="0">The application state will be saved</TextBlock>
</StackPanel>
</Button>
This code working well except a one issue. The Description line becomes invisible when the button is pushed.
I'm sure the root cause is the low contrast color of the description line. But I don't know how to fix it.
Update: I have tried to use the PhoneTextSubtleStyle style but still have the same issue.

You could retemplate the Button (using the Control.Template property) to look different so that when pushed it no longer interferes with the content.

Could you try something like this
System.Windows.Visibility.Visible;
System.Windows.Visibility.Hidden;
or
System.Windows.Visibility.Collapsed
here is a link that will show an example of how to use this inside of a StackPanel
How to: Change the Visibility Property

How to display Groupboxes in order of selection

I need to a collection of groupboxes varying on the user selection. for example; there will be 7 groupboxes, the user can enable however many they want and in what order they want. So i want the selected groupbox B to appear at the bottom of the previously selected groupbox A yet when A is unselected B moves up the form to where A was.
In my mind i want it to behave similar to HTML items.
This will be done in WPF, coding in C#.

You can stack these groupboxes in a stackpanel with orientation=vertical. You can then set the Visibility of the groupboxex to the users decision and wpf will make the rest for you "by magic".
Little sample here:
<StackPanel Orientation="Vertical">
<GroupBox x:Name="First" Visibility="Visible" Header="First">
<Label>First</Label>
</GroupBox>
<GroupBox x:Name="Second" Visibility="Collapsed" Header="Second">
<Label>Second</Label>
</GroupBox>
<GroupBox x:Name="Third" Visibility="Visible" Header="Third">
<Label>Third</Label>
</GroupBox>
</StackPanel>

Put your GroupBoxes in a collection of some kind and databind that collection to a cusomised ListView. Whenever the selected state of a GroupBox changes update the view of that ListView to sort them based on your requirements. Unfortunately I am not good enough to provide a working sample in the time I have, sry.

c# WPF how to produce a flashy warning

I'm learning WPF, so bear with me.
I would like to have my WPF application flash in the user's face if a certain event is fired.
What is the best way to "notify" the user? I really want the user to react!
Cheers, Patrick
Environment: Windows7/64bit/.Net4

If you want the user to react you can force them to by simply opening a modal dialogue. The most lightweight of which being the MessageBox. You can also create normal modal windows using their ShowDialog method, you can make those windows as "fancy" as you want by getting rid of their normal appearance. This is achieved by setting the WindowStyle to None and AllowsTransparency to true, this will remove all the frame elements, so the window is now pure content.
Popups are handy for non-modal notifications and they already are content-only, but setting their AllowsTransparency to true may also be desired if you want rounded corners for example.

Best is entirely subjective and depends on many context variables but here is how I do it MVVM style.
In your main view model, define a property
pubic ObservableCollection<AlertViewModel"> Alerts { get; private set; }
in my case the AlertViewModel has only a "Message" property and a "Dismiss" RelayCommand.
In the XAML of your main view add
<Grid>
<all of my other other view controls>
<ItemsControl x:Name="AlertsControl" Opacity="50" ItemsSource="{Binding Alerts}"/>
</Grid>
Make sure it is the last item in the main container of your main view. This ensures it has the highest z order and will appear on top of all other controls.
Here is the data template for this view model
<DataTemplate DataType="{x:Type vm:AlertViewModel}">
<Border CornerRadius="10" Margin="3" Background="Red">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="75"></ColumnDefinition>
<ColumnDefinition></ColumnDefinition>
</Grid.ColumnDefinitions>
<Button Margin="10" Grid.Column="0"
Command="{Binding ElementName=theWindow, Path=DataContext.DismissAlarmCommand}"
CommandParameter="{Binding}">Dismiss</Button>
<TextBlock Foreground="White" FontWeight="ExtraBold" Grid.Column="1"
Text="{Binding Message}" FontSize="20"
VerticalAlignment="Center" HorizontalAlignment="Left"></TextBlock>
</Grid>
</Border>
</DataTemplate>
Now,
Alerts.Add( new AlertViewModel() { Message = "Danger Will Robinson! Danger!" } );
Will pop a Bright red alert box onto the top of your main form. It does not go away until the user presses "Dismiss"
If you want it to flash or fade in and out or bounce up and down you can add animation in the data template.
You can use a Converter or data to Enable/Disable the rest of the controls in the app byt binding to AlertsControl.HasItems
Good luck.