Develop Reference

C# Windows IoT core - Auto Scroll text in Textblock from left to right continuously

I am working on a Digital Signage project using Windows IoT core. So far I managed to design the grid and scroll images and videos. Now I have added a text block at the bottom of the grid and text in it should continuously scroll from left to right
For more detail example I need a MARQUEE of text in the bottom side.
Main page XAML code:
<Page
x:Class="Digital_Notiec_Board_V1._2.MainPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:Digital_Notiec_Board_V1._2"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d">
<Grid Background="#FF222222" HorizontalAlignment="Stretch" VerticalAlignment="Stretch">
<Grid.RowDefinitions>
<RowDefinition MaxHeight="1800"></RowDefinition>
<RowDefinition Height="20"></RowDefinition>
</Grid.RowDefinitions>
<Image x:Name="imageInstance" Visibility="Collapsed" Grid.Row="0"/>
<MediaElement x:Name="audioInstance" Visibility="Collapsed" Grid.Row="0"/>
<MediaElement x:Name="videoInstance" Visibility="Collapsed" Grid.Row="0"/>
<ScrollViewer Grid.Row="1" Background="#FF5A80FF">
<TextBlock x:Name="ScrollText" TextWrapping="Wrap" Foreground="White" Text="AJ Y" ScrollViewer.HorizontalScrollBarVisibility="Disabled" ScrollViewer.VerticalScrollBarVisibility="Disabled" ScrollViewer.HorizontalScrollMode="Auto" SelectionHighlightColor="#FF2D5DFF">
</TextBlock>
</ScrollViewer>
</Grid>

Well if you need to show a Marquee text only then I would advise you to use a custom control that allows you to put a text as a marquee.
Luckily, there is a GitHub repo for the same. You can check it out on `GitHub at MarqueeTextControl
works perfectly fine, I just tried it. If you need any further help, please use the comments section.

WPF - Text in TextBox not Selectable?

I am working on a project that dynamically loads text into a Text Box control. The problem is that, for some reason, the text does not seem as if it can be selected. I do not understand why as I thought that, by default, the text in a Text Box was selectable. Why is this and how can I fix it? Here is my XAML:
<Window x:Name="viewWindow" x:Class="Games_Database.View"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="View" Height="300" Width="600" Loaded="windowLoad" ScrollViewer.HorizontalScrollBarVisibility="Visible">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="77*"/>
<RowDefinition Height="13*"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="57*"/>
</Grid.ColumnDefinitions>
<ScrollViewer VerticalScrollBarVisibility="Auto" HorizontalScrollBarVisibility="Auto" Width="550" Margin="21,5,21,10" Grid.RowSpan="2" IsManipulationEnabled="True">
<TextBox x:Name="text" HorizontalAlignment="Center" Margin="5,0,0,0" TextWrapping="Wrap" VerticalAlignment="Center" IsHitTestVisible="False" Height="Auto" Width="500" Grid.RowSpan="2" ScrollViewer.CanContentScroll="True" FontSize="14" FontFamily="Times New Roman" IsInactiveSelectionHighlightEnabled="True" Text="" AutoWordSelection="True" />
</ScrollViewer>
</Grid>
Any help would be greatly appreciated. Thanks much in advance!

The text cannot be selected because you have IsHitTestVisible="False".
If you remove that attribute, the text box will once again be able to respond to mouse clicks from the user. Note that, with your current code, you can get the cursor inside the text box by pressing the tab key.

It's beacause you have IsHitTestVisible property set to false. Setting this property to false means that control will not respond on any mouse events. However you are still able to enter the control by using tab.
Perhaps this blog post will make it more clear to you.

Last component of User Control doesn't fill the available space on the hosting grid

I am working on a C# wpf project and I am having an issue. I have a Main Window which hosts a grid. This grid hosts a User Control and the User Control hosts 3 DockPanels in a 3 column layout.
The 3 columns are adjustable via a grid splitter which is working however, the right hand side column isn't filling the available space of the Main Window grid.
Below is the XAML of my Main Window hosting the user control:
<Window x:Class="Boardies_Email_Client.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"
xmlns:local="clr-namespace:Boardies_Email_Client"
mc:Ignorable="d"
Title="MainWindow" Height="350" WindowStartupLocation="CenterScreen" ResizeMode="CanResizeWithGrip" WindowState="Maximized">
<Grid>
<Grid x:Name="GridHost" Margin="0" Background="#FFF3FF00"/>
<StatusBar Height="24" VerticalAlignment="Bottom"/>
</Grid>
</Window>
Below is the XAML for the User Control
<UserControl x:Class="Boardies_Email_Client.EmailClient"
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:Boardies_Email_Client"
mc:Ignorable="d"
d:DesignHeight="505">
<Grid HorizontalAlignment="Left" Width="1120">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="92*"/>
<ColumnDefinition Width="121*"/>
<ColumnDefinition Width="87*"/>
<ColumnDefinition Width="225*"/>
<ColumnDefinition Width="134*"/>
<ColumnDefinition Width="116*"/>
<ColumnDefinition Width="345*"/>
</Grid.ColumnDefinitions>
<DockPanel Background="#FFEC1717" Grid.ColumnSpan="2">
<Label x:Name="label" Content="My Label" Margin="0,0,0,460" Width="175"/>
</DockPanel>
<GridSplitter x:Name="gridSplitter" HorizontalAlignment="Left" Width="5" Grid.Column="2"/>
<DockPanel LastChildFill="False" Margin="5,0,0,0" Background="#FF5DFF00" Grid.Column="2" Grid.ColumnSpan="3"/>
<GridSplitter x:Name="gridSplitter1" HorizontalAlignment="Left" Width="5" Grid.Column="5"/>
<DockPanel Grid.Column="5" Margin="5,0,0,0" Background="#FF0A00E2" Grid.ColumnSpan="2"/>
</Grid>
</UserControl>
Below is a screenshot showing the problem
The red, green and blue are the dock panels separated by grid splitters. The yellow is the background colour of the the grid of the main window hosting the user control, the blue panel should be filling up the available space of the yellow but I can't see why it isn't.
I haven't hard set any widths that I can find.

#Boardy
I ran your code.
The splitting of the UserControl and organization of the Grid are fine.
But you set the width to a fixed size :
<UserControl ...>
<Grid HorizontalAlignment="Left" Width="1120">
If you remove the fixed size, everything is fine, the control takes the size of the window and you don't see other background (yellow or right) on the right for sizes larger than 1120 :
<UserControl ...>
<Grid >
Regards

create the same effect on a text as the title of windows

I create a transparency window with different textblock but my text isn't always readable because it's depends of colors user's window.
So I want apply the same effect on a text like the effect of my title window,
It's like a white shadow.
Thank you

The best way to do this would be to use a shader effect. I tried to do this with the built in Blur effect but it seems they don't blend with Alpha.
Below is an example of how I would start and doesn't represent an end product. HLSL border effect based off of Emboss effect.
View the full image for a better understanding. This effect only adds like 2 px border so the scaling makes it look even worse.
I'm pretty bad at writing HLSL the code on the right is just copy-pasted from http://brooknovak.wordpress.com/2008/09/16/simple-image-filters-written-as-hlsl-pixel-shaders/ with modification.
I'm sure someone who knew HLSL / GLSL could write a blur effect that works correctly. Note that this effect works across a full image and thus needs to know the image size. You should put them in a constant buffer and use them instead of the hardcoded 500.0 for width and height. They need to be the width/height of the rendered object. In my example it is actually the entire left half side of the window not just the size of the text because my XAML looks like this...
<Window x:Class="WpfApplication2.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525"
Loaded="Window_Loaded" Background="Transparent">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="264*" />
<ColumnDefinition Width="239*" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="218*" />
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<TextBlock Text="The quick brown fox jumped over the lazy dog." Foreground="White" Background="Transparent" Grid.RowSpan="3" x:Name="PART_TextBlock"/>
<TextBox x:Name="PART_TextBox" Grid.Column="1" HorizontalScrollBarVisibility="Disabled" VerticalScrollBarVisibility="Visible" AcceptsReturn="True" AcceptsTab="True" />
<TextBlock x:Name="PART_Error" Grid.Column="1" Grid.Row="1"/>
<Button Content="Compile & Apply" Grid.Column="1" Grid.Row="2" Padding="4,1" Margin="4" HorizontalAlignment="Center" Click="Button_Click" />
</Grid>
</Window>

how do i get my datagrid to grow with the window and maintain margins?

Everything about my layout will flow with the resizing of the main window. The problem I'm facing is that as you can see, the datagrid goes off the screen. If you maximize the window, the datagrid will resize with the window, but continue to go off the screen. How do I get it to maintain its margin of 20 with it's parent grid?
<Grid>
<StackPanel Orientation="Vertical">
<TextBox Height="170" Name="txtSQL" VerticalAlignment="Top" AcceptsReturn="True" TextWrapping="Wrap" Margin="20"/>
<Button Content="Run!" Height="23" HorizontalAlignment="Left" Name="btnRun" VerticalAlignment="Top" Margin="20,0,0,0" Width="75" Click="btnRun_Click" />
<Grid>
<my:DataGrid Name="dgResults" VerticalAlignment="Top" Margin="20" />
</Grid>
</StackPanel>
</Grid>
UPDATE:
Just to be more specific. The effect I'm trying to accomplish here is this:
When the window first loads, you are presented with a blank datagrid, so it's only about 15 pixels high. When you run the query, it will populate the datagrid by reassigning the itemssource. As of now, when you do that, if the data exceeds the window size, it will go off the bottom of the screen. I need it to only expand to the bottom of the window then enable the scrollbar. I can do this just by wrapping it in a scrollviewer im sure. However, when the window is resized, the datagrid needs to resize with it.
I'm wondering if the setup might have something to do with it. The form is actually a wpf page being displayed in a frame.
UPDATE:
<Page x:Class="Hold_Database___Prototype_1.Views.SQL"
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="304" d:DesignWidth="732"
Title="SQL" xmlns:my="http://schemas.microsoft.com/wpf/2008/toolkit" AllowDrop="True">
<Grid>
<Grid.RowDefinitions>
<RowDefinition />
<RowDefinition Height="23" />
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<TextBox Height="170" Name="txtSQL" VerticalAlignment="Top" AcceptsReturn="True" TextWrapping="Wrap" Margin="20" Grid.Row="0"/>
<Button Content="Run!" Height="23" HorizontalAlignment="Left" Name="btnRun" VerticalAlignment="Top"
Margin="20,0,0,0" Width="75" Grid.Row="1" Click="btnRun_Click" />
<DockPanel Grid.Row="2">
<my:DataGrid Name="dgResults" Margin="20" />
</DockPanel>
</Grid>
</Page>

What is the dock panel for in this example?
Try putting the DataGrid directly in the cell with no stackpanel. If you are setting the button height then set set grid to auto.
Also, why give so much space to the text?
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<TextBox Height="170" Name="txtSQL" VerticalAlignment="Top" AcceptsReturn="True" TextWrapping="Wrap" Margin="20" Grid.Row="0"/>
<Button Content="Run!" Height="23" HorizontalAlignment="Left" Name="btnRun" VerticalAlignment="Top"
Margin="20,0,0,0" Width="75" Grid.Row="1" Click="btnRun_Click" />
<my:DataGrid Grid.Row="2" <my:DataGrid Name="dgResults" Margin="20" />
Then also set HorizontalAlignment, VerticleAlignment, HorizontalContentAlignment, and VerticalContentAlignment = stretch

Your Grid is drawn off screen without a scroll bar because you are using a StackPanel. Care must be taken when using StackPanel - it is the most simplistic of all WPF Panel derived classes since its MeasureOverride calls Measure for all of its children with a size of double.PositiveInifity regardless of how much space the panel actually has available. Even a ScrollViewer will not help you with a StackPanel (the ScrollBar will be shown, but you won't be able to move it).
For example, consider a Window 350 in height and width, and a single Button as its content which is 500 in both height and width:
<Window x:Class="WpfApplication2.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="350">
<StackPanel>
<ScrollViewer HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto">
<Button Content="Hello" Height="500" Width="500" />
</ScrollViewer>
</StackPanel>
</Window>
Similar to your example, the Button here is drawn off screen in both the vertical and horizontal directions and a non-functional scroll bar will be present. If we change the panel to one which respects the size of its given area (e.g. DockPanel):
<Window x:Class="WpfApplication2.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525">
<DockPanel>
<ScrollViewer>
<Button Content="Hello" Height="500" />
</ScrollViewer>
</DockPanel>
</Window>
then scroll bars appear which are functional and hence allow the content off screen to be shown by scrolling.
Hope this helps!

What I have done was do define the horizontal and vertical alignments to "Stretch" respectively at the control you want (your DataGrid) to take up the size based on the window being resized.