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UWP Navigation Pane go back button not working

I'm learning UWP and trying to implement GO BACK button in a navigation pane. I put go-back button under a RelativePanel right below menu button. The below is my current XAML page:
<Page
x:Class="LearningUWP.MainPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:LearningUWP"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:muxc="using:Windows.UI.Xaml.Controls"
mc:Ignorable="d"
Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
<Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}" >
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<RelativePanel>
<Button Name="Menu" FontFamily="Segoe MDL2 Assets" Content="" FontSize="36" Click="Menu_Click"></Button>
<Button RelativePanel.Below="Menu" Style="{StaticResource NavigationBackButtonNormalStyle}" Name="Back" FontSize="36" Click="Back_Click"></Button>
</RelativePanel>
<SplitView Name="MySplitView"
Grid.Row="1"
DisplayMode="CompactOverlay"
OpenPaneLength="200"
CompactPaneLength="56"
HorizontalAlignment="Left">
<SplitView.Pane>
<ListBox SelectionMode="Single"
Name="IconsListBox"
SelectionChanged="IconsListBox_SelectionChanged"
>
<ListBoxItem Name="ShareListBoxItem">
<StackPanel Orientation="Horizontal" >
<TextBlock FontFamily="Segoe MDL2 Assets" FontSize="36" Text=""/>
<TextBlock Text="Share" FontSize="24" Margin="20, 0, 0, 0"/>
</StackPanel>
</ListBoxItem>
<ListBoxItem Name="FavoritesListBoxItem" >
<StackPanel Orientation="Horizontal" >
<TextBlock FontFamily="Segoe MDL2 Assets" FontSize="36" Text=""/>
<TextBlock Text="Favorites" FontSize="24" Margin="20, 0, 0, 0"/>
</StackPanel>
</ListBoxItem>
</ListBox>
</SplitView.Pane>
<SplitView.Content>
<TextBlock Margin="50, 0, 0, 0" Name="ResultTextBlock"/>
</SplitView.Content>
</SplitView>
</Grid>
</Page>
And the XAML's code-behind:
namespace LearningUWP
{
public sealed partial class MainPage : Page
{
public MainPage()
{
this.InitializeComponent();
}
private void Menu_Click(object sender, RoutedEventArgs e)
{
MySplitView.IsPaneOpen = !MySplitView.IsPaneOpen;
}
private void IconsListBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
if (ShareListBoxItem.IsSelected)
ResultTextBlock.Text = "shared";
else if (FavoritesListBoxItem.IsSelected)
ResultTextBlock.Text = "Favorites";
}
private void Back_Click(object sender, RoutedEventArgs e)
{
if (this.Frame.CanGoBack)
this.Frame.GoBack();
}}}
For some reason, after I click the Go back button, it doesn't work as expected, and what is more, I find this.Frame.CanGoBack = false.
How to solve it?

From the code that you have posted we can see that this.Frame is actually the refering to the root frame of the application, which at the moment has only navigated to a single page (MainPage) (As defined in your App.xaml.cs). Thus there is no page that it can go back to (this.Frame.CanGoBack = false).
A little in depth explanation :
If you go into App.xaml.cs file in your project, in the OnLaunched() method you will find the following code :
rootFrame.Navigate(typeof(MainPage), e.Arguments);
Here the application, after launch will navigate the rootFrame to the MainPage.
When you use this.Frame from your MainPage it actually refers to the rootFrame, which at this moment has only navigated to the MainPage, thus it does not have any page that it can go back to , hence this.Frame.CanGoBack = false.
Solution :
When you use a SplitView, in the content you should specify a Frame which you can use to navigate between different pages . Thus your app will look something like this :
Here Red rectangle is used to show the rootFrame where as Blue is used to show the Frame which you have to define in your SplitView content.
For this, you need to make minor modifications to your code something like this :
XAML
<Page
.....
.....
<SplitView Name="MySplitView"
.....>
<SplitView.Pane>
.....
</SplitView.Pane>
<SplitView.Content>
<Frame x:Name="appFrame"></Frame>
</SplitView.Content>
</SplitView>
</Page>
C#
private void IconsListBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
if (ShareListBoxItem.IsSelected)
appFrame.Navigate(typeof(page1));//navigating to page1
else if (FavoritesListBoxItem.IsSelected)
appFrame.Navigate(typeof(page2));//navigating to page2
}
private void Back_Click(object sender, RoutedEventArgs e)
{
if (appFrame.CanGoBack)
appFrame.GoBack();
}
Hope this helps..!

clicking messagebox.show() hides showdialog() window

I have following code in WPF:
private void BtnTicketPrice_Click(object sender, RoutedEventArgs e)
{
TicketPrice TP = new TicketPrice();
TP.ShowDialog();
}
in New Window form i have following code:
private void BtnSave_Click(object sender, RoutedEventArgs e)
{
MessageBox.Show("sometext");
}
on clicking messagebox button the form (TicketPrice) also is closing;
how to show messagebox without closing the form?
If i'd change TP.ShowDialog(); to TP.Show();, it works correctly. I have this problem only with this TP.ShowDialog();
xaml of button
<Button x:Name="BtnSave" HorizontalAlignment="Left" Margin="619,362,0,0" VerticalAlignment="Top" Width="165" Height="66" IsCancel="True" TabIndex="4" Click="BtnSave_Click">
<StackPanel Orientation="Horizontal">
<TextBlock Text="save " HorizontalAlignment="Center" VerticalAlignment="Center" FontWeight="SemiBold" />
<Image Source="pack://siteoforigin:,,,/Resources/Save.png" Height="50" Width="59" />
</StackPanel>
</Button>

You're seeing the IsCancel property on the Button working as advertised. Don't set it to true and clicking the button won't automatically close the dialog.

How to Overlay a Popup in a Specific Pivot Item

This is an interesting question, but I would like to overlay a popup only on a single PivotItem within my PivotPage, and only after a certain number of 'events' occurs (the events being a click event, say 50 times clicked). I have in my PivotItem a ListBox, but I am wondering how after my condition is met that I can overlay a popup over it?
XAML
<phone:PivotItem Header="{Binding Path=LocalizedResources.EditPage_Header_Effects, Source={StaticResource LocalizedStrings}}">
<ListBox Name="ListBoxEffects" SelectionMode="Single" ItemsSource="{Binding}" Margin="{Binding}"
toolkit:TiltEffect.IsTiltEnabled="True" SelectionChanged="ListBox_SelectionChanged" >
<ListBox.ItemsPanel>
<ItemsPanelTemplate>
<toolkit:WrapPanel ItemWidth="146" />
</ItemsPanelTemplate>
</ListBox.ItemsPanel>
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Vertical" Margin="12,0,0,24" >
<Image Source="{Binding Thumbnail}" Width="134" Height="134" />
<TextBlock Text="{Binding Name}" TextWrapping="Wrap" FontSize="{StaticResource PhoneFontSizeNormal}" VerticalAlignment="Center" HorizontalAlignment="Center" />
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</phone:PivotItem>
Code Behind
private void BuildLocalizedApplicationBar()
{
// Set the page's ApplicationBar to a new instance of ApplicationBar.
ApplicationBar = new ApplicationBar();
ApplicationBarIconButton saveButton = new ApplicationBarIconButton(new Uri("/Assets/AppBar/save.png", UriKind.Relative));
saveButton.Text = AppResources.EditPage_ApplicationBar_Save;
saveButton.Click += saveButton_Click;
ApplicationBar.Buttons.Add(saveButton);
}
void saveButton_Click(object sender, EventArgs e)
{
Settings.SavedCount.Value += 1;
if(Settings.SavedCount.Value > 50)
//Display Popup
ApplySelectedEffectAndSaveAsync();
}
Also, I would need to somehow retrieve the resulting value of the popup (From an OK or Cancel button), and depending on that result either call the ApplySelectedEffectAndSaveAsync() method or return to the previous PivotItem (or previous page). The PivotItem with the overlay is actually index 1 and there is another PivotItem before it with index of 0.

<phone:PivotItem ...>
<Grid>
<ListBox .../>
<Popup Name="MyPopup" IsOpen="false"/>
</Grid>
</phone:PivotItem>
And you manage MyPopup from code behind (you count the clicks or events and set MyPopup.IsOpen = true)

It seems like you are looking for MessageBox.Show. This method shows a popup with your own caption, text and either an OK or OK and cancel buttons. The method returns a MessageBoxResult value which is either MessageBoxResult.OK or MessageBoxResult.Cancel.
This is how it should be implemented in your code:
private void BuildLocalizedApplicationBar()
{
// Set the page's ApplicationBar to a new instance of ApplicationBar.
ApplicationBar = new ApplicationBar();
ApplicationBarIconButton saveButton = new ApplicationBarIconButton(new Uri("/Assets/AppBar/save.png", UriKind.Relative));
saveButton.Text = AppResources.EditPage_ApplicationBar_Save;
saveButton.Click += saveButton_Click;
ApplicationBar.Buttons.Add(saveButton);
}
void saveButton_Click(object sender, EventArgs e)
{
Settings.SavedCount.Value += 1;
if(Settings.SavedCount.Value > 50)
{
if(MessageBox.Show("Message", "Title", MessageBoxButton.OKCancel) == MessageBoxResult.OK)
// Action for "OK"
else
// Action for "Cancel"
}
}

How focus out the Cursor from textbox in wpf?

<Grid x:Name="LayoutRoot">
<TextBox x:Name="TxtFocusOut" Height="74" Margin="186,149,225,0" TextWrapping="Wrap" VerticalAlignment="Top" HorizontalContentAlignment="Center" VerticalContentAlignment="Center" FontSize="26.667" TextChanged="TextBox_TextChanged"/>
</Grid>
private void TextBox_TextChanged(object sender, System.Windows.Controls.TextChangedEventArgs e)
{
if(TxtFocusOut.Text.Length>=4)
{
MessageBox.Show("Four you typed four values");
}
}
After I clicked Ok Button On message box,the cursor should be focused out from the texbox.But now it is Blinking in the textbox.What should i do to focused out from the testbox?

FocusManager.SetFocusedElement(AnotherElementID);
by doing this the this will loose its foucs and foucs can be use for another element.
or
Keyboard.ClearFocus();
http://msdn.microsoft.com/en-us/library/system.windows.input.keyboard.clearfocus.aspx
try any of these

creating multiple panels and displaying one panel on button click in wpf

I am new to WPF and I want to create a WPF application with 5buttons. On the click of each button I want a content to be displayed on another panel. Right now I just want different images to be displayed on my right side panel on the button clicks.
Here's my XAML code:
<Window x:Class="GridButton.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MyFirstApp" Height="350" Width="525" Loaded="Window_Loaded">
<Viewbox Stretch="Fill" StretchDirection="Both">
<DockPanel>
<StackPanel DockPanel.Dock="left" Margin="5" Width="Auto" VerticalAlignment="Center" Height="Auto">
<Button Content="1" Name="button2" Click="button2_Click">
</Button>
<Button Content="2" Name="button1" Click="button1_Click_1">
</Button>
<Button Content="3" Name="button3" Click="button3_Click">
</Button>
<Button Content="4" Name="button4" Margin="5">
</Button>
<Button Content="5" Name="button5" Margin="5" Click="button5_Click_1">
</Button>
</StackPanel>
<StackPanel DockPanel.Dock="Right">
<Image Name="img1" Source="Blue Hills.jpg" Stretch="Uniform" Visibility="Hidden" ImageFailed="Image_ImageFailed" Height="257" />
</StackPanel>
</DockPanel>
And my xaml.cs file contains code to display image:
private void button2_Click(object sender, RoutedEventArgs e)
{
img1.Visibility = Visibility.Visible;
}
I could get only this far.

You can set the Source property of the Image control in code:
private void buttonx_Click(object sender, RoutedEventArgs e)
{
string path = ... // path to image file here
img1.Source = new BitmapImage(new Uri(path));
}
You could easily reuse the same Click handler for all Buttons and check which one was pressed:
private void Button_Click(object sender, RoutedEventArgs e)
{
Button button = sender as Button;
string path = null;
if (button == button1)
{
path = ... // path to image file 1 here
}
else if ...
if (path != null)
{
img1.Source = new BitmapImage(new Uri(path));
}
}
If you want to remove the a child Panel (or other control) from a parent Panel and add another one, you would have to modify the Panel's Children property:
<StackPanel Name="parent">
<StackPanel Name="child" />
</StackPanel>
parent.Children.Remove(child);
parent.Children.Add(...); // some other control here
This approach would usually make sense if you wanted to create child panels dynamically. If you want to declare everything in XAML you may put all child panels in a Grid and change their visibility as you did already.
However, you might also change the ZIndex attached property.
<Grid>
<StackPanel Name="child1">
</StackPanel>
<StackPanel Name="child2">
</StackPanel>
<StackPanel Name="child3">
</StackPanel>
</Grid>
child3 is topmost by default, but now you can set ZIndex to some value > 0 to make another child topmost:
private void Button_Click(object sender, RoutedEventArgs e)
{
...
// reset ZIndex on previous topmost panel to 0 before
Panel.SetZIndex(child1, 1);
}
Or completely omit the Button/Grid/Panel design and use a TabControl.