Develop Reference

WPF Material Design Textbox is showing through slides. Is there a workaround?

I tried using a textbox inside a WPF Material Design transitioner slide. The textbox is visible even when changing slides.
A dotted line from the textbox on the next slide is visible, and viceversa.
Has anyone else encountered this issue? Is there any workaround I could use?
This is the xaml I used. I am using the transitioner control although I believe the flipper control causes a similar effect when used with textboxes.
<Grid>
<materialDesign:Transitioner SelectedIndex="0">
<materialDesign:TransitionerSlide>
<StackPanel HorizontalAlignment="Center">
<TextBlock Text="Hello, this is my first page!" Margin="10"/>
<TextBox materialDesign:HintAssist.Hint="Type your first text here!" Margin="10"/>
<Button Command="{x:Static materialDesign:Transitioner.MoveNextCommand}" Content=">" HorizontalAlignment="Center" Margin="10"/>
</StackPanel>
</materialDesign:TransitionerSlide>
<materialDesign:TransitionerSlide>
<StackPanel HorizontalAlignment="Center">
<TextBlock Text="Hello, this is my 2nd page!" Margin="15"/>
<TextBox materialDesign:HintAssist.Hint="Type your second text here!" Margin="15"/>
<Button Command="{x:Static materialDesign:Transitioner.MovePreviousCommand}" Content="<" HorizontalAlignment="Center" Margin="15"/>
</StackPanel>
</materialDesign:TransitionerSlide>
</materialDesign:Transitioner>
</Grid>
I believe the issue might lie in the dotted line that appears when a textbox is disabled, so possibly by removing that, the textbox would no longer show through slides. But that's just my guess.
Any help is appreciated!

For the best approach, please refer to this answer.
Try to add the following implicit style to your App.xaml or window:
<Style TargetType="materialDesign:BottomDashedLineAdorner">
<Setter Property="Visibility" Value="Collapsed" />
</Style>

I try several ways and I found solution
please set BorderThickness="0" in textboxes like this
<TextBox materialDesign:HintAssist.Hint="Type your second text here!" Margin="10" BorderThickness="0"/>

Wrapping the offending control in:
<AdornerDecorator>
</AdornerDecorator>
seems to work.

Hi problem is in your margin , please set all your margins to 10 like this
<Grid>
<materialDesign:Transitioner SelectedIndex="0">
<materialDesign:TransitionerSlide>
<StackPanel HorizontalAlignment="Center">
<TextBlock Text="Hello, this is my first page!" Margin="10"/>
<TextBox materialDesign:HintAssist.Hint="Type your first text here!" Margin="10"/>
<Button Command="{x:Static materialDesign:Transitioner.MoveNextCommand}" Content=">" HorizontalAlignment="Center" Margin="10"/>
</StackPanel>
</materialDesign:TransitionerSlide>
<materialDesign:TransitionerSlide>
<StackPanel HorizontalAlignment="Center">
<TextBlock Text="Hello, this is my 2nd page!" Margin="10"/>
<TextBox materialDesign:HintAssist.Hint="Type your second text here!" Margin="10"/>
<Button Command="{x:Static materialDesign:Transitioner.MovePreviousCommand}" Content="<" HorizontalAlignment="Center" Margin="15"/>
</StackPanel>
</materialDesign:TransitionerSlide>
</materialDesign:Transitioner>
</Grid>
I hope it help you

Add Buttons and a Textblock With Each Binded Image

I'm developing an UWP app and i'm trying to add two buttons and a textblock for each image that binded.
I'm binding the images in XAML like this; (Updated with the full code)
<GridView Name="display"
Margin="30,100,30,5"
Foreground="#FFFFFF"
IsItemClickEnabled="True"
ItemClick="display_ItemClick"
ItemsSource="{Binding}">
<GridView.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Vertical">
<Image Width="240"
Height="240"
Source="{Binding Path=Image}" />
<StackPanel Name="buttonPanel"
Orientation="Horizontal"
Margin="0,-45,10,0"
HorizontalAlignment="Center">
<Button Name="button_minus"
Content="-"
Width="40"
Height="30"
Click="eksi_click"
FontWeight="Bold">
<Button.Background>
<ImageBrush ImageSource="Assets/btn2.png" Stretch="Fill" />
</Button.Background>
</Button>
<Border Background="White" CornerRadius="10" Height="30">
<TextBlock x:Name="popupNumber"
Width="50"
Height="25"
Margin="0,6,0,0"
Text="{Binding Path=numberOfCopy}"
TextAlignment="Center">
</TextBlock>
</Border>
<Button Name="button_plus" Content="+" Width="40" Height="30" Click="artı_Click" FontWeight="Bold">
<Button.Background>
<ImageBrush ImageSource="Assets/btn2.png" Stretch="Fill" />
</Button.Background>
</Button>
</StackPanel>
</StackPanel>
</DataTemplate>
</GridView.ItemTemplate>
</GridView>
I added a stackpanel that contains the Buton-TextBlock-Button format in the seciton of code that i commented out. When i do this, some buttons are not working and i don't actually know is it the best way to do my task.
When i launch the program, some buttons are not available to click. I can see them in the UI but i can't click them. The most awkward thing is only in a specific area on the UI, buttons are unavailable.
My click events are just fine, i have some binding issues, i am wondering is it the proper way to to something like that. Is it the way i am using causes the binding problem?
In in each TextBlock the values should be different for each image and i can't access buttons and textblocks in .cs file because they are in DataTemplate. So i might be doing this in a wrong way.
So do you have any solutions for adding buttons and textblocks for each binded image in Datatemplate? I'm not sure my way is the best way.
Any help would be greatly appreciated.
Thanks.

'Live' Slider value into label

I've made an app that allowes me to control a Microsoft NXT 2.0 Mindstorms robot and I've recently added a slider that I want to use to set the current engine speed instead of having a fixed value, so I need help.
Here I have the XAML of the label and slider that I want to use:
<Slider x:Name="Speed" HorizontalAlignment="Left" Margin="40,58,0,0" VerticalAlignment="Top" Width="30" Orientation="Vertical" Height="187" Maximum="90" Minimum="-90" SmallChange="1" LargeChange="10" IsSnapToTickEnabled="True" TickFrequency="5" TickPlacement="BottomRight" AutoToolTipPlacement="BottomRight" MouseUp="Speed_MouseUp" BorderBrush="#00000000" Background="#00000000" Foreground="#FF858585">
<Label x:Name="Current_Speed" Content="Currently: " HorizontalAlignment="Right" Margin="0,0,478,257" Width="60" Height="29" VerticalAlignment="Bottom" Foreground="Black" />
I want Current_Speed to write Currently: {SliderValue} I want it to write the current value of the slider instantly as I move my slider up or down like you can do with the ToolTip option.
Any ideas?
(Bear in mind, I'm not very skilled, so detailed solutions would be much appreciated)
Thank you in advance :)

It's relatively easy. The "trick" is that you need to use two different Label objects, which you can aggregate together using a StackPanel container.
For the second Label object, just set the Label's Content attribute like this:
Content="{Binding ElementName=Speed, Path=Value}"
The whole thing will look something like this:
<Slider x:Name="Speed"
HorizontalAlignment="Left" VerticalAlignment="Top"
Margin="40,58,0,0"
Width="30" Height="187"
Orientation="Vertical"
Maximum="90" Minimum="-90"
SmallChange="1" LargeChange="10"
IsSnapToTickEnabled="True" TickFrequency="5" TickPlacement="BottomRight"
AutoToolTipPlacement="BottomRight"
MouseUp="Speed_MouseUp"
BorderBrush="#00000000" Background="#00000000" Foreground="#FF858585" />
<StackPanel Orientation="Horizontal" Margin="0,0,0,257" Height="29">
<Label x:Name="Current_Speed_Text"
Content="Currently: "
HorizontalAlignment="Right" VerticalAlignment="Bottom"
Foreground="Black" />
<Label x:Name="Current_Speed"
Content="{Binding ElementName=Speed, Path=Value}"
HorizontalAlignment="Right" VerticalAlignment="Bottom"
Foreground="Black" />
</StackPanel>
Note: I have rearranged the layout a bit to ensure the UI elements are properly visible, and have reformatted the XAML itself to aid in readability.
I will also suggest that you use some other mechanism for controlling layout than setting the Margin values. The Margin attribute is very good for ensuring adequate space between elements, but it's not very good at accommodating flexible layout of elements, as it usually requires hand-modifying the margin values as other element characteristics change (e.g. font size, number of characters in the text, etc.).
Likewise, you should use Width and Height sparingly. They have similar problems.
In other words, if you apply the above suggestion to your XAML and it doesn't seem to work, it's because the Label is currently being laid out in such a way that the extra "speed value" text can't be seen.

Is it possible to have same name on two components?

I am doing a project where I need a timer with drop shadow. I managed to figure out a way to do the drop shadow with 2 labels, but my problem now is that I need to give both the same name to act in the exact same way in all situation WITHOUT having duplicated code. Is this possible?
<Grid>
<Label x:Name="time" MouseDoubleClick="time_MouseDoubleClick" HorizontalAlignment="Center" FontFamily="Old English Text MT" Margin="0,5,0,0" FontSize="22" Content="00:00:00" FontWeight="Bold" Foreground="Black">
<Label.RenderTransform>
<TranslateTransform X="1.5" Y="1"/>
</Label.RenderTransform>
</Label>
<Label x:Name="time2" MouseDoubleClick="time_MouseDoubleClick" HorizontalAlignment="Center" FontFamily="Old English Text MT" Margin="0,5,0,0" FontSize="22" Content="00:00:00" FontWeight="Bold" Foreground="White"/>
</Grid>
This is how the code looks to make the drop shadow. Is there a way around this? Or is there a way like in HTML where I can define a "class" name?

You don't need two labels. You need DropShadowEffect:
<Label Content="00:00:00">
<Label.Effect>
<DropShadowEffect/>
</Label.Effect>
</Label>

It seems that you in actual fact need a drop-shaddow effect, another implementation to have two controls update based on the same property might lie in binding.
In the initialize method of the codebehind file set the DataContext.
DataContext = this;
Change your xaml to bind to a common string property.
<Grid>
<Label x:Name="time" MouseDoubleClick="time_MouseDoubleClick" HorizontalAlignment="Center" FontFamily="Old English Text MT" Margin="0,5,0,0" FontSize="22" Content="{Binding Time}" FontWeight="Bold" Foreground="Black">
<Label.RenderTransform>
<TranslateTransform X="1.5" Y="1"/>
</Label.RenderTransform>
</Label>
<Label x:Name="time2" MouseDoubleClick="time_MouseDoubleClick" HorizontalAlignment="Center" FontFamily="Old English Text MT" Margin="0,5,0,0" FontSize="22" Content="{Binding Time}" FontWeight="Bold" Foreground="White"/>
</Grid>
(The content property now includes binding)
Ensure that you have a property in the codebehind to support the binding
public string Time {get;set;}
Your code-behind (.cs file) should implement the INotifyPropertyChanged interface, and your property should Raise the Event.
Then by changing the Time property, the XAML will automatically update.

set visibility of image dynamically in expanderview

I am trying to implement something where I need to display list of people and a green icon if they are online. these people are grouped by some categories. I am using an expanderview toolkit control to display the list. So how do I set the icon image to be visible dynamically ? I have tried something like this which didnt work.
<DataTemplate x:Key="groupsItemTemplate">
<StackPanel Orientation="Horizontal" Margin="30,5,0,0"">
<Image Height="30" Width="30" Source="/Assets/Online.png" Margin="10,5,0,0" Visibility="{Binding IsFriendOnline}"></Image>
<TextBlock TextWrapping="NoWrap" FontFamily="Segoe WP Light" FontSize="24" Margin="8,0,0,0" VerticalAlignment="Center" HorizontalAlignment="left" Height="auto" Width="300" Text="{Binding FriendName}"></TextBlock>
</StackPanel>
</DataTemplate>
IsFriendOnline is an integer property.

Firstly, you need to use a converter in order to convert the value of your IsFriendOnline property to the Visibility enum that you require.
WPF has a "BooleanToVisibilityConverter" built in so if you have the ability to change the IsFriendOnline to a boolean value (which sounds like it makes a little more sense anyway) I would go down this route... if its imperative that the property is an integer then you will need to roll your own converter which isnt difficult.
The syntax would look something like this when you have a converter (my code below assumes IsFriendOnline is a boolean)...
<BooleanToVisibilityConverter x:Key="BooleanToVisibilityConverter" />
<DataTemplate x:Key="groupsItemTemplate">
<StackPanel Orientation="Horizontal" Margin="30,5,0,0"">
<Image Height="30" Width="30" Source="/Assets/Online.png" Margin="10,5,0,0" Visibility="{Binding IsFriendOnline, Converter={StaticResource BooleanToVisibilityConverter}}"></Image>
<TextBlock TextWrapping="NoWrap" FontFamily="Segoe WP Light" FontSize="24" Margin="8,0,0,0" VerticalAlignment="Center" HorizontalAlignment="left" Height="auto" Width="300" Text="{Binding FriendName}"></TextBlock>
</StackPanel>
</DataTemplate>
Hope this helps...