Develop Reference

How to design this ListViewItem

I want my ListViewItem to look like this. As you can see when the ListViewItem is selected/has focus the Border should change color.
The Main Problem is that I can't put a Border around the ContenPresenter in the ControlTemplate because than also the TextBox with the "Description"-Binding will be inside the Border. But I only want the TextBox and Icon to be inside the Border that changes Colors and not also the Description ("Nachname", "Vorname").
This is the XAML I have so far. I don't know how to change the border in the ControlTemplate:
<ListView x:Name="SearchFields" Grid.Row="0" Grid.Column="0" ItemsSource="{Binding CustomerSearchFields}" SelectedItem="{Binding selectedSearchField, UpdateSourceTrigger=LostFocus}" Style="{StaticResource MaterialDropShadowStyle}"
BorderThickness="0,0,2,0" Padding="24,24,24,0" HorizontalContentAlignment="Stretch" helper:EnterKeyTraversal.IsEnabled="True" KeyboardNavigation.TabNavigation="Cycle" FontFamily="{StaticResource DefaultFontFamily}"
Background="{StaticResource ColorLightGray2}">
<ListView.Resources>
<DataTemplate DataType="{x:Type model:CustomerSeachFieldViewModel}">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="*" />
<RowDefinition Height="48" />
</Grid.RowDefinitions>
<TextBlock Grid.Row="0" Text="{Binding Description}" FontSize="{StaticResource FontSizeSmall}" FontWeight="SemiBold" Foreground="{StaticResource ColorDarkGray}" Margin="0,0,0,4" />
<Border x:Name="PART_Border" Grid.Row="1" BorderThickness="1" BorderBrush="{StaticResource ColorGray}">
<Grid Background="White">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="48" />
</Grid.ColumnDefinitions>
<TextBox Grid.Column="0" Text="{Binding SearchText}" VerticalAlignment="Stretch" HorizontalAlignment="Stretch" FontSize="{StaticResource FontSizeNormal}" Padding="12,15" BorderThickness="0" />
<Border Grid.Column="1" Background="{StaticResource ColorLightGray2}" Margin="8">
<ctrl:IconViewbox IconData="{StaticResource IconPathSearch}" IconSize="16" IsTabStop="False" />
</Border>
</Grid>
</Border>
</Grid>
</DataTemplate>
</ListView.Resources>
<ListView.ItemContainerStyle>
<Style TargetType="ListViewItem">
<Setter Property="IsTabStop" Value="False" />
<Setter Property="Margin" Value="0,0,0,24" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate>
<ContentPresenter Content="{Binding}" />
</ControlTemplate>
</Setter.Value>
</Setter>
<Style.Triggers>
<Trigger Property="IsKeyboardFocusWithin" Value="True">
<Setter Property="IsSelected" Value="True" />
</Trigger>
<Trigger Property="IsSelected" Value="True">
<Trigger.Setters>
<Setter Property="BorderBrush" Value="Fuchsia" />
</Trigger.Setters>
</Trigger>
</Style.Triggers>
</Style>
</ListView.ItemContainerStyle>
</ListView>

You can add a Trigger to your Border named PART_Border as follow:
<Border x:Name="PART_Border" Grid.Row="1" BorderThickness="1" >
<Border.Style>
<Style TargetType="Border">
<Setter Property="BorderBrush" Value="DarkGray" />
<Style.Triggers>
<DataTrigger Binding="{Binding IsSelected, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type ListViewItem}}}"
Value="True" >
<Setter Property="BorderBrush" Value="Black"/>
</DataTrigger>
</Style.Triggers>
</Style>
</Border.Style>
<Grid Background="White">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="48" />
</Grid.ColumnDefinitions>
<TextBox Grid.Column="0"
Text="{Binding SearchText}" VerticalAlignment="Stretch" HorizontalAlignment="Stretch" FontSize="15" Padding="12,15" BorderThickness="0" />
<Border Grid.Column="1" Background="Gray" Margin="8">
<Rectangle Width="20" Height="20" />
</Border>
</Grid>
</Border>
Please note that I replaced some StaticResource mapped to some Colors from your code with standard color in order to test my code.
I also replaced the icon with a Rectangle for the same reason.

Try for your IsSelected trigger:
<Trigger Property="IsSelected" Value="True">
<Setter TargetName="PART_Border" Property="BorderBrush" Value="Fuchsia" />
<Setter TargetName="PART_Border" Property="BorderThickness" Value="1" />
</Trigger>

You could add a Style with a DataTrigger that binds to the IsSelected property of the parent ListViewItem to the Border in your DataTemplate:
<Border x:Name="PART_Border" Grid.Row="1" BorderThickness="1">
<Border.Style>
<Style TargetType="Border">
<Setter Property="BorderBrush" Value="{StaticResource ColorGray}" />
<Style.Triggers>
<DataTrigger Binding="{Binding IsSelected, RelativeSource={RelativeSource AncestorType=ListViewItem}}"
Value="True">
<Setter Property="BorderBrush" Value="Red" />
</DataTrigger>
</Style.Triggers>
</Style>
</Border.Style>
</Border>
Note that you need to set the default value of the property ({StaticResource ColorGray}) using a Style setter for the DataTrigger to be able to set the property when the ListViewItem is selected.

C# WPF UI freeze while datatable binding with Listbox

hi I am using DataTable for binding data with Listbox
DataTable row count = 1000+ and I have to load all row.
and when I binding
// Inside BackgroundThread
DataTable table = GetDataFromServer(); // Get Data (DataTable row count = 1000+)
this.Dispatcher.Invoke(new Action(() =>
{
FilteredList.DataContext = table ; // UI Hangs Progress bar freeze around 20-30+ seconds
}), DispatcherPriority.Background);
XML Code
<Grid Grid.Row="0" x:Name="gridFilteredList" Visibility="Collapsed">
<ListView Style="{DynamicResource MyListView}" Grid.Row="0" AllowDrop="True" x:Name="FilteredList"
IsSynchronizedWithCurrentItem="False" ItemsSource="{Binding Mode=OneWay}"
BorderThickness="0" BorderBrush="Black" ScrollViewer.ScrollChanged="syncList_ScrollChanged"
ItemContainerStyle="{StaticResource BorderedListViewItemStyle}" SelectedItem="{x:Null}"
Background="{DynamicResource DefaultMSBackgroundColor}" ScrollViewer.HorizontalScrollBarVisibility="Disabled"
HorizontalContentAlignment="Stretch" ScrollViewer.CanContentScroll="False" Focusable="True" SelectionChanged="syncList_SelectionChanged" SelectionMode="Single" MouseMove="syncList_MouseMove"
MouseEnter="syncList_MouseEnter"
MouseLeave="syncList_MouseLeave">
<ListView.ItemTemplate>
<DataTemplate>
<Grid x:Name="FileItemGrid" Margin="0" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Cursor="Hand">
<Grid Margin="0 10 10 10" Height="35" >
<Grid.ColumnDefinitions>
<ColumnDefinition Width="40"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Image Grid.Column="0" Cursor="Hand" Source="{Binding Path=imagestring, Mode=OneWay}" VerticalAlignment="Center" Margin="5,0" HorizontalAlignment="Center" Style="{StaticResource Image32StyleNearestNeighbor}" />
<Grid Grid.Column="1">
<Grid.RowDefinitions>
<RowDefinition />
<RowDefinition />
</Grid.RowDefinitions>
<Grid Grid.Row="0" >
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="Auto" />
</Grid.ColumnDefinitions>
<TextBlock Grid.Column="0" Cursor="Hand" Foreground="#FF333333" TextTrimming="CharacterEllipsis" TextWrapping="NoWrap" VerticalAlignment="Center" Text="{Binding Path=name, Mode=OneTime}" />
<TextBlock Grid.Column="1" Cursor="Hand" Foreground="#FF333333" TextTrimming="CharacterEllipsis" TextWrapping="NoWrap" VerticalAlignment="Center" Text="{Binding Path=size, Mode=OneTime}" HorizontalAlignment="Right" />
</Grid>
<TextBlock Grid.Row="1" FontSize="11" TextTrimming="CharacterEllipsis" VerticalAlignment="Center" >
<Run Text="{Binding Path=formattedtime, Mode=OneTime}" Foreground="#FFB3B3B3"/>
<Run Text="-"/>
<Run Text="{Binding Path=activity, Mode=OneTime}" Foreground="{Binding Path=StatusLabelColour, Mode=OneTime}"/>
</TextBlock>
</Grid>
<Grid Grid.Column="1" Margin="5 0 0 0" HorizontalAlignment="Right" VerticalAlignment="Bottom">
<Grid Visibility="{Binding Path=DeleteImageVisible, Mode=OneWay}" ToolTip="Click to recover file" Name="SyncDelete"
Cursor="Hand" MouseLeftButtonDown="SyncDelete_MouseLeftButtonDown" Style="{DynamicResource GridWithBackground}">
<Image x:Name="imgDelete" SnapsToDevicePixels="True" Source="pack://application:,,,/Resources/UserControl/SyncSummary_Delete.png"
Style="{StaticResource Image16StyleHighQuality}"/>
</Grid>
<Image Name="errorImage" VerticalAlignment="Center" Cursor="Hand" HorizontalAlignment="Center" Style="{StaticResource Image16StyleHighQuality}"
Source="{Binding Path=errorStringImage, Mode=OneWay}" ToolTip="{Binding Path=errorStringToolTip, Mode=OneWay}" ToolTipService.ShowDuration="50000" UseLayoutRounding="True" />
</Grid>
<Button Grid.Column="1" x:Name="btnShare" Content="Share" Click="btnShare_Click" Margin="0,0,10,0" >
<Button.Style>
<Style TargetType="Button">
<Setter Property="Foreground" Value="White" />
<Setter Property="Height" Value="30" />
<Setter Property="Padding" Value="10,0,10,0" />
<Setter Property="Cursor" Value="Hand" />
<Setter Property="BorderBrush" Value="Black" />
<Setter Property="Background" Value="{DynamicResource DefaultMSForegroundColor}" />
<Setter Property="VerticalContentAlignment" Value="Center" />
<Setter Property="HorizontalContentAlignment" Value="Center" />
<Setter Property="FontWeight" Value="Bold" />
<Setter Property="HorizontalAlignment" Value="Right" />
<Setter Property="Visibility" Value="Collapsed" />
<Style.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter Property="Foreground" Value="Black" />
</Trigger>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding RelativeSource={RelativeSource Mode=FindAncestor,AncestorType={x:Type ListViewItem}},Path=IsMouseOver, Mode=OneWay}"
Value="True" />
<Condition Binding="{Binding Path=ShareBtnVisible, Mode=OneWay}"
Value="Visible" />
</MultiDataTrigger.Conditions>
<MultiDataTrigger.Setters>
<Setter Property="Visibility" Value="Visible" />
</MultiDataTrigger.Setters>
</MultiDataTrigger>
</Style.Triggers>
</Style>
</Button.Style>
</Button>
</Grid>
</Grid>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
</Grid>
Should i use ObservationCollection or Any other design pattern for solve freeze issue ?

You are setting the ScrollViewer.CanContentScroll attached property of the ListView to false which effectively disables the built-in UI virtualization and this affects the performance negatively.
Don't set this property to false if you care about rendering and scrolling performance.

Put your code in a Task (own thread) and your UI won't freeze anymore. You'll always have this problem when calling long running operations in the UI thread.

C# UWP TextBlock text change in Button Style programatically

I have a button with Resource style. I would like to change Text of TextBlock in Button Content. I didn't find any solution.
Any idea?
<Style x:Key="NavigationLogoutButtonStyle" TargetType="Button" BasedOn="{StaticResource NavigationBackButtonNormalStyle}">
<Setter Property="HorizontalAlignment" Value="Stretch"/>
<Setter Property="HorizontalContentAlignment" Value="Stretch"/>
<Setter Property="Height" Value="48"/>
<Setter Property="Width" Value="NaN"/>
<Setter Property="MinWidth" Value="48"/>
<Setter Property="AutomationProperties.Name" Value="Logout"/>
<Setter Property="Content">
<Setter.Value>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="48" />
<ColumnDefinition />
</Grid.ColumnDefinitions>
<FontIcon Grid.Column="0" FontSize="16" Glyph="" VerticalAlignment="Center" HorizontalAlignment="Center"/>
<StackPanel Grid.Column="1" Orientation="Vertical">
<TextBlock Style="{ThemeResource BodyTextBlockStyle}" Text="!!!TEXT HERE PROGRAMATICALLY!!!" Foreground="{StaticResource MainColorBrush}" FontSize="13" VerticalAlignment="Center" />
<TextBlock Style="{ThemeResource BodyTextBlockStyle}" Text="{StaticResource LogoutButtonText}" VerticalAlignment="Center" />
</StackPanel>
</Grid>
</Setter.Value>
</Setter>

You can do a hack, change the line:
<TextBlock Style="{ThemeResource BodyTextBlockStyle}" Text="!!!TEXT HERE PROGRAMATICALLY!!!" Foreground="{StaticResource MainColorBrush}" FontSize="13" VerticalAlignment="Center" />
to
<TextBlock Style="{ThemeResource BodyTextBlockStyle}" Text="{Binding Tag}" Foreground="{StaticResource MainColorBrush}" FontSize="13" VerticalAlignment="Center" />
And set the Tag property of your Button in code.
The proper way to do it would be declare new DependencyProperty type string of a CustomButton which inherits from Button. Then apply the Style to the new CustomButton type. Bind the Text property to the newly created DependencyProperty

Disable blue border for selected Listview item

I have a ListView with Horizontal WrapPanel as its ItemsPanelTemplate.
I want to get rid of the blue background for selected item. It is visible only on the left of the selected item.
There are many similar question on SO and I tried a lot of the solutions and none of them worked.
This is what I have already tried:
<ListView.Resources>
<Style TargetType="{x:Type ListViewItem}">
<Style.Resources>
<!-- Foreground for Selected ListViewItem -->
<SolidColorBrush x:Key="{x:Static SystemColors.HighlightTextBrushKey}"
Color="Black"/>
<!-- Background for Selected ListViewItem -->
<SolidColorBrush x:Key="{x:Static SystemColors.HighlightBrushKey}"
Color="Transparent"/>
<!--SelectedItem without focus-->
<SolidColorBrush x:Key="{x:Static SystemColors.ControlBrushKey}" Color="Transparent"/>
</Style.Resources>
</Style>
</ListView.Resources>
<ListView.ItemContainerStyle>
<Style TargetType="{x:Type ListViewItem}">
<EventSetter Event="Control.MouseDoubleClick" Handler="HandleSelectedItemDoubleClick"/>
<Style.Triggers>
<Trigger Property="IsSelected" Value="true">
<Setter Property="RenderTransform">
<Setter.Value>
<ScaleTransform ScaleX="2" ScaleY="2" CenterX="12" CenterY="12" />
</Setter.Value>
</Setter>
<Setter Property="Panel.ZIndex" Value="150"/>
<Setter Property="FocusVisualStyle" Value="{x:Null}"/>
<Setter Property="BorderBrush" Value="{x:Null}" />
<Setter Property="Background" Value="{x:Null}" />
</Trigger>
</Style.Triggers>
</Style>
</ListView.ItemContainerStyle>
<ListView.ItemsPanel>
<ItemsPanelTemplate>
<WrapPanel Orientation="Horizontal" Width="210" Margin="15" />
</ItemsPanelTemplate>
</ListView.ItemsPanel>

You need to overwrite the SystemColors.HighlightBrushKey for the ListView to be Transparent (or whatever color you want)
I typically put this in the ListView.Resources so it only applies to the specific ListView, and not all ListViews in my application
<ListView.Resources>
<SolidColorBrush x:Key="{x:Static SystemColors.HighlightBrushKey}"
Color="Transparent"/>
</ListView.Resources>
Its very close to what you have in your code already, but you need to set it for the ListView.Resources, not ListViewItem.Resources

To remove all default styling (hovering, selecting, etc.) just define a custom Template for the ItemContainer (not the Item itself):
<ListView.ItemContainerStyle>
<Style TargetType="{x:Type ListViewItem}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ListViewItem}">
<ContentPresenter />
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</ListView.ItemContainerStyle>
Found on MSDN Forum

This is what did it for me:
<UserControl.Resources>
<DataTemplate x:Key="ItemTemplate">
<StackPanel Orientation="Vertical" Background="Transparent" Opacity="1" Width="185" MaxWidth="185">
<StackPanel Orientation="Horizontal">
<TextBlock
Margin="0,0,10,0"
Background="Transparent"
Foreground="DarkGoldenrod"
FontSize="12" FontStyle="Italic"
Text="{Binding Path=EventTypeName, Mode=OneWay}" />
<TextBlock
Background="Transparent"
Foreground="DarkGoldenrod"
FontSize="12" FontStyle="Italic"
Text="{Binding Path=AccountIdentity, Mode=OneWay}" />
</StackPanel>
<TextBlock
Background="Transparent"
Foreground="DarkGoldenrod" MaxWidth="170"
FontSize="12" FontStyle="Italic" TextTrimming="WordEllipsis" ToolTip="{Binding Path=EventMessage,Mode=OneWay}"
Text="{Binding Path=EventMessage, Mode=OneWay}" />
<TextBlock
Background="Transparent"
Foreground="Black"
FontSize="8"
Text="{Binding Path=EventLoggedOn, Mode=OneWay}"
TextTrimming="WordEllipsis"
ToolTip="{Binding Path=EventLoggedOn, Mode=OneWay}"
Margin="0,0,10,0" />
<StackPanel Orientation="Horizontal">
<TextBlock
Background="Transparent"
Foreground="Black"
FontSize="8"
Text="{Binding Path=QualifiedCreator, Mode=OneWay}" />
</StackPanel>
</StackPanel>
</DataTemplate>
<DataTemplate x:Key="SelectedTemplate">
<StackPanel Orientation="Vertical" Background="LightGray" Opacity="1" Width="185" MaxWidth="185">
<StackPanel Orientation="Horizontal">
<TextBlock
Margin="0,0,10,0"
Background="Transparent"
Foreground="Yellow"
FontSize="12" FontStyle="Italic"
Text="{Binding Path=EventTypeName, Mode=OneWay}" />
<TextBlock
Background="Transparent"
Foreground="Yellow"
FontSize="12" FontStyle="Italic"
Text="{Binding Path=AccountIdentity, Mode=OneWay}" />
</StackPanel>
<TextBlock
Background="Transparent"
Foreground="DarkGoldenrod" MaxWidth="170"
FontSize="12" FontStyle="Italic" TextTrimming="WordEllipsis" ToolTip="{Binding Path=EventMessage,Mode=OneWay}"
Text="{Binding Path=EventMessage, Mode=OneWay}" />
<TextBlock
Background="Transparent"
Foreground="Black"
FontSize="8"
Text="{Binding Path=EventLoggedOn, Mode=OneWay}"
TextTrimming="WordEllipsis"
ToolTip="{Binding Path=EventLoggedOn, Mode=OneWay}"
Margin="0,0,10,0" />
<StackPanel Orientation="Horizontal">
<TextBlock
Background="Transparent"
Foreground="Black"
FontSize="8"
Text="{Binding Path=QualifiedCreator, Mode=OneWay}" />
</StackPanel>
</StackPanel>
</DataTemplate>
<Style TargetType="ListViewItem" x:Key="ContainerStyle">
<Setter Property="Background" Value="Transparent"/>
<Setter Property="ContentTemplate" Value="{StaticResource ResourceKey=ItemTemplate}" />
<Style.Triggers>
<Trigger Property="IsSelected" Value="True" >
<Setter Property="ContentTemplate" Value="{StaticResource ResourceKey=SelectedTemplate}" />
</Trigger>
</Style.Triggers>
</Style>
</UserControl.Resources>

The simplest way to do this is to set the background to {x:Null} when the item is selected, using a trigger.
<ListView>
<ListView.ItemContainerStyle>
<Style TargetType="{x:Type ListViewItem}">
<Style.Triggers>
<Trigger Property="IsSelected"
Value="True">
<Setter Property="Background"
Value="{x:Null}" />
<Setter Property="BorderBrush"
Value="{x:Null}" />
</Trigger>
</Style.Triggers>
</Style>
</ListView.ItemContainerStyle>
...
</ListView>

Popup does not close when scrolling

I have a textbox in which when it has focus a popup appears below it. But when the popup is open and I scroll, it appears to stay in the same spot where it was opened. I need help in figuring out how to have the popup appear below the textbox when I scroll. How would I do this in xaml?
Thanks!
MainWindow View:
<Grid x:Name="LayoutRoot">
<ScrollViewer>
<local:ControlView/>
</ScrollViewer>
</Grid>
Resource Dictionary:
<Style TargetType="{x:Type Popup}">
<Style.Triggers>
<DataTrigger Binding="{Binding ElementName=txtTest, Path=IsKeyboardFocused}" Value="True">
<Setter Property="IsOpen" Value="True" />
</DataTrigger>
<DataTrigger Binding="{Binding ElementName=txtTest, Path=IsKeyboardFocused }" Value="False">
<Setter Property="IsOpen" Value="False" />
</DataTrigger>
</Style.Triggers>
</Style>
<Style x:Key="BorderStyle" TargetType="{x:Type Border}">
<Setter Property="Background" Value="LemonChiffon"/>
<Setter Property="Padding" Value="5"/>
</Style>
UserControl View:
<Grid x:Name="LayoutRoot">
<StackPanel Grid.Row="1" Grid.Column="4" Orientation="Vertical">
<Button Content="Button" Width="100" Height="100"/>
<Button Content="Button" Width="100" Height="100"/>
<TextBox x:Name="txtTest" HorizontalAlignment="Stretch"/>
<Popup Name="TestPopup" StaysOpen="True"
PlacementTarget="{Binding ElementName=txtTest}"
AllowsTransparency="True" Placement="{Binding ElementName=txtTest}">
<Border Style="{DynamicResource BorderStyle}">
<GroupBox Header="Test Popup">
<ScrollViewer Margin="0,2,0,0" VerticalScrollBarVisibility="Hidden">
<!--BINDING-->
<Label Content="Hello World!"/>
</ScrollViewer>
</GroupBox>
</Border>
</Popup>
<ContentPresenter Content="{Binding testBinding}"
VerticalAlignment="Stretch" HorizontalAlignment="Stretch">
</ContentPresenter>
</StackPanel>
</Grid>

Try this:
<Style TargetType="{x:Type Popup}">
<Setter
Property="IsOpen"
Value="{Binding IsKeyboardFocusedWithin, ElementName=txtTest, Mode=OneWay}"/>
</Style>