I have a listbox control added to my layout as show in the below code snippet.
<ListBox x:Name="lstFilters" ItemsSource="{Binding CustomerCollection, Source={StaticResource VMCustomers}}" ScrollViewer.VerticalScrollBarVisibility="Disabled" Height="200" Margin="12,20,235,80">
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<HyperlinkButton Content="{Binding Name}" Style="{StaticResource styleFont}"></HyperlinkButton>
<TextBlock x:Name="txtFilterCount" Text="{Binding ContactNumber, Mode=TwoWay}"></TextBlock>
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
<Style x:Key="styleFont" TargetType="HyperlinkButton">
<Setter Property="FontFamily" Value="Verdana"></Setter>
</Style>
I have written a style that sets the font family to HyperlinkButton control.
Now i want to set this fontfamily from code behind because i am getting the value at runtime. so how to change it and one more thing i want to do this at the constructor or page load event i.e. i want to set this only once and it should apply for all the items i.e if there are 100 items then it should get applied to all the 100 items. so it makes it faster instead of always binding it any event.
The easiest way to do this is to bind the style to a property of the UserControl using the following XAML:
<Style x:Key="styleFont" TargetType="HyperlinkButton">
<Setter Property="FontFamily"
Value="{Binding DataContext.ListFont,
RelativeSource={RelativeSource AncestorType=UserControl}}">
</Setter>
</Style>
Then you just need to update the property and the style will reflect the new Font for all the list items.
Update:
This answer is only valid for Silverlight 5.
Related
I have made an ListView ItemTemplate and I want it to be responsive (when orientation changes, for example, the listView item changes in size). I am using a Grid as a control for the inner elements of the grid but it is not behaving. The ListView.ItemContainerStyle has property HorizontalAlignment="Stretch" which is the behaviour I want, and the ItemContainerStyle is the correct width. Inside the Border and Grid I have the same HorizontalAlignment="Stretch" and they are overflowing when the TextBox contained inside has lots of text, and when there is little or no text in the TextBox the Border element shrinks to be smaller than the ItemContainerStyle is showing.
<ListView ItemsSource="{Binding TileStories}" x:Name="cont" Margin="0,10,0,10" Background="{StaticResource CustomResourceBrush}" BorderBrush="{StaticResource CustomResourceBrush}" Foreground="{StaticResource CustomResourceBrush}">
<ListView.ItemContainerStyle>
<Style TargetType="ListViewItem">
<Setter Property="HorizontalContentAlignment" Value="Stretch" />
<Setter Property="Margin" Value="20,10,20,10" />
<Setter Property="Foreground" Value="{StaticResource BTVioletBrush}" />
</Style>
</ListView.ItemContainerStyle>
<ListView.ItemTemplate>
<DataTemplate>
<Border CornerRadius="20" BorderThickness="0" Width="{Binding ScrollViewerWidth}" Background="White" HorizontalAlignment="Stretch">
<StackPanel Height="160" Orientation="Horizontal">
<Grid Background="black">
<TextBox Text="Example">
</Grid>
</StackPanel>
</Border>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
Just do this
<ListView.ItemContainerStyle>
<Style TargetType="ListViewItem">
<Setter Property="HorizontalContentAlignment" Value="Stretch" />
</Style>
</ListView.ItemContainerStyle>
<ListView.ItemTemplate>
<DataTemplate>
<Grid HorizontalAlignment="Stretch">
</Grid>
</DataTemplate>
</ListView.ItemTemplate>
Define MinHeight as 0 for ItemContainerStyle
Add to your ItemContainerStyle
<Setter Property="HorizontalContentAlignment"
Value="Stretch" />
And I think Width="{Binding ScrollViewerWidth}" is not required. You can remove this.
I didn't exactly find a solution but I did find a workaround. The Grid was being bound with Width="0" if I used {Binding ActualWidth, ElementName=StackPanel, Mode=OneWay} where StackPanel was the panel within the data template. I was poking around the designer in VS2013 and figured out that the Width was 0 because (I am assuming) the items in the data template are drawn one by one and therefore the Width was zero when the first template was drawn and so on and so forth. I haven't explained that very well I guess, but the important thing is the solution:
<PivotItem x:Name="Feed">
....
<Border CornerRadius="20" BorderThickness="0" Background="White" HorizontalAlignment="Stretch">
<StackPanel Height="160" Orientation="Horizontal">
<Grid HorizontalAlignment="Stretch" Width="{Binding ActualWidth, ElementName=Feed, Mode=OneWay}">
........
</Grid>
</StackPanel>
</Border>
...
</PivotItem>
I think that the PivotItem having a non-variable Width meant the Grid had a concrete Width to inherit from.
I'm currently creating a Windows 8.1 Store app that acts as a task tracker. My current problem is that I want to change the Items listed in listview to represent their priority. I want to do this by Changing the Background color. IE: Red = High, Blue = Medium, and Green = Low.
The ListBoxItems themselves follow a Template, below is the relevant Text field I want to base changes from x:Name=priorityBind.
<StackPanel Orientation="Horizontal">
<TextBlock Text="Priority: " Margin="10, 0, 10, 10" />
<TextBlock x:Name="priorityBind" Text="{Binding Path=Priority}" Margin="10, 0, 10, 10"/>
</StackPanel>
<StackPanel Orientation="Horizontal">
<TextBlock Text="Notes: " Margin="10, 0, 10, 10" />
<TextBlock Text="{Binding Path=Notes}" Margin="10, 0, 10, 10"/>
</StackPanel>
</StackPanel>
</Grid>
</DataTemplate>
All the examples I can find seem to be done with outdated version of the Store Apps. Setting up triggers seems to be the suggest route to go, but it no longer seems to work in the updated version. Below is a snippet of my ListView Code. How do I modify it so that it only updates the background color to green if the priority textbox holds a value of "Low"?
<ListView x:Name="eventsListView" Grid.Row="1" Grid.Column="1"
ItemTemplate="{StaticResource eventTemplate}">
<ListView.Resources>
<Style TargetType="ListViewItem">
<Style.Setters>
<Setter Property="BorderBrush"
Value="White" />
<Setter Property="BorderThickness"
Value="5"/>
<Setter Property="Background"
Value="Green"/>
</Style.Setters>
</Style>
</ListView.Resources>
</ListView>
You can specify which priority should use which tempalte by using ItemTemplateSelector
ItemTemplateSelector lets ListView to render different templates based on the property you give as parameter.This is the best practice solution AFAIK.
This problem is about the listbox itself and not it's cells. If I put listbox into a viewbox, and click on an item, the whole listbox will be surrounded with a 1px border. I do not want that, because it is ugly. How to remove this border?
Details:
<Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
<Viewbox Grid.Row="1" Stretch="Uniform">
<StackPanel Orientation="Horizontal" Margin="0,20,0,20">
<Grid Width="200">
<ListBox ItemsSource="{Binding Rajzelemek}" Background="{x:Null}">
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<ContentControl Background="{ThemeResource ApplicationPageBackgroundThemeBrush}" Content="{Binding Ikonja}" Width="25" Height="25" VerticalAlignment="Center" />
<TextBlock Text="{Binding}" VerticalAlignment="Center" Foreground="{ThemeResource ApplicationForegroundThemeBrush}" />
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
<ListBox.ItemsPanel>
<ItemsPanelTemplate>
<StackPanel Orientation="Vertical" Background="{ThemeResource ApplicationPageBackgroundThemeBrush}" />
</ItemsPanelTemplate>
</ListBox.ItemsPanel>
</ListBox>
</Grid>
</StackPanel>
</Viewbox>
</Grid>
If I comment the <Viewbox Grid.Row.... part, everything is fine, but not scaled. I want stuff to get scaled, well that is why I use the viewbox, but I do not want this border:
The code above was put on a metro BlankPage1 too, and made the same thing.
I think you're looking for what's in the ListBoxItem template wherein there's a Rectangle acting as a Focus Visual, if you check out the default template you'll see it with a default brush attributed to it (FocusVisualWhiteStrokeThemeBrush) which you could either change in the template, or provide your own resource for it to find before it hits the default dictionaries like;
<SolidColorBrush x:Key="FocusVisualWhiteStrokeThemeBrush" Color="Transparent" />
Hope this helps.
EDIT
Sorry I was going by the picture you have, thought it was the item. In any case since your ViewBox is the culprit you just need to interact with the Border control within it >like you showed in a previous post of your own< where you're the one making that border. Something like;
<Viewbox>
<Viewbox.Resources>
<Style TargetType="Border">
<Setter Property="BorderBrush" Value="Transparent" />
<Setter Property="BorderThickness" Value="0" />
</Style>
</Viewbox.Resources>
...
</ViewBox>
I have a ListBox and ApplicationBar with Opacity=.5. I want that ListBox items are under the ApplicationBar.
Like figure:
But when I scrolled to end of list then last element of ListBox is under the ApplicationBar.
I want that last element is over ApplicationBar.
Can I add padding for a last element of the ListBox (LongListSelector)? How can solved this issue?
UPDATE
<ListBox Name="MyListBox">
<ListBox.ItemContainerStyle>
<Style TargetType="ListBoxItem">
<i:Interaction.Triggers>
<ec:DataTrigger Binding="{Binding RelativeSource=
{RelativeSource Self},
Converter={StaticResource IsLastItemInContainerConverter}}"
Value="True">
<ec:ChangePropertyAction PropertyName="Padding" Value="0,0,0,72"/>
</ec:DataTrigger>
</i:Interaction.Triggers>
</Style>
</ListBox.ItemContainerStyle>
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel Background="Red"
Width="400"
Height="120"
Margin="15">
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
UPDATE 2
My problem can be easily solved by using LongListSelector. Just add empty ListFooterTemplate with Height = ApplicationBar height.
You can use converter to check if it's last item in listbox and in case yes, set padding to desired value via DataTrigger.
Check my answer over here for converter code. Just for sake of completeness of this answer i will post that converter code here:
public class IsLastItemInContainerConverter : IValueConverter
{
public object Convert(object value, Type targetType,
object parameter, CultureInfo culture)
{
DependencyObject item = (DependencyObject)value;
ItemsControl ic = ItemsControl.ItemsControlFromItemContainer(item);
return ic.ItemContainerGenerator.IndexFromContainer(item)
== ic.Items.Count - 1;
}
public object ConvertBack(object value, Type targetType,
object parameter, CultureInfo culture)
{
throw new NotImplementedException();
}
}
and use it like this:
<ListBox>
<ListBox.ItemContainerStyle>
<Style TargetType="ListBoxItem">
<Style.Triggers>
<DataTrigger Binding="{Binding RelativeSource=
{RelativeSource Self},
Converter={StaticResource IsLastItemInContainerConverter}}"
Value="True">
<Setter Property="Padding" Value="5"/>
</DataTrigger>
</Style.Triggers>
</Style>
</ListBox.ItemContainerStyle>
</ListBox>
edit: Didn't see the update to the original question. The below remains for additional detail.
This solution is for Windows Phone 8 only (although you could use the LongListSelector from the Windows Phone Toolkit if you are targeting 7.1/5).
I'd replace the ListBox with the LongListSelector from the SDK
<Grid>
<controls:LongListSelector ItemTemplate="{StaticResource Item}" ListFooterTemplate="{StaticResource Footer}" />
</Grid>
and for the templates add
<phone:PhoneApplicationPage.Resources>
<DataTemplate x:Key="Item">
<StackPanel Background="Red"
Width="400"
Height="120"
Margin="15">
</StackPanel>
</DataTemplate>
<DataTemplate x:Key="Footer">
<Border Height="72" />
</DataTemplate>
</phone:PhoneApplicationPage.Resources>
Maybe simplest solution is to customize ItemsPanel property on ListBox:
<ListBox>
<ListBox.ItemsPanel>
<ItemsPanelTemplate>
<StackPanel Margin="0,0,0,150"/> <!-- set margin to show some 'blank' space after last item -->
</ItemsPanelTemplate>
</ListBox.ItemsPanel>
...
</ListBox>
But be aware that by default ListBox uses VirtualizedStackPanel as ItemsPanel. If you change it to StackPanel, it may bring some performance penalty. This is solution is suitable for lists with few items.
Say i have this XAML :
<StackPanel>
<TextBlock Text="{Binding Path=TaskName}" />
<TextBlock Text="{Binding Path=Description}"/>
<TextBlock Text="{Binding Path=Priority}"/>
</StackPanel>
I'd like re use it across multiple places.
For example as a DataTemplate for a ItemsControl but also as The basis for something like a buttons content.
How would i go about doing this?
I'm thinking something like an ASP.NET Partial view.
I don't want to use a usercontrol as i don't require any code behind.
I managed to get it to work in a way using a style:
<Style x:Key="myStyle" TargetType="Control">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate>
<StackPanel>
<TextBlock Text="{Binding Path=TaskName}" />
<TextBlock Text="{Binding Path=Description}"/>
<TextBlock Text="{Binding Path=Priority}"/>
</StackPanel>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
It insisted on me using a TargetType otherwise it complained about setting the template.
I can now use this on any control.
If i want to then use this essentially as a datatemplate, i can just set the style of the placeholder item within the datatemplate (probably a ContentControl) to use this.
Create a StylesResourceDictionary.xaml and create a staticresource in your App.Xaml. At runtime, the styles will get binded and then you can reference anything from the dictionary anywhere in your app, across usercontrols or datatemplates etc.