i do have a problem with binding the visibility of my usercontrol.
The binding to a Dependency Property of type Visibility works fine and the correct value (in this case Collapsed) is held by the DP. The content of my Grid within the UserControl is set to collapsed, but the hole control doesnt collapse. It still keeps the space occupied defined by with and heigth, as referenced in the xaml.
EDIT: i found out, that the problem is that i set width and height in the xaml where i reference my usercontrol. if i don't do this, the control collapses correct (therefore binding works fine). But i need to set width and heigth in case the usercontrol is visible.
Any idea how i can solve this problem?
<my:MenuButtonBase x:Class="bxSuite.Controls.MenuButtonLarge"
xmlns:my="clr-namespace:bxSuite.Controls"
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"
Background="Black"
>
<Grid Visibility="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type UserControl}}, Path=ButtonVisibility}" >
<StackPanel>
<Image Source="{Binding ButtonImageSource}" Margin="5,10,5,5" Width="48" Height="48" VerticalAlignment="Top" HorizontalAlignment="Center" />
<TextBlock Text="{Binding FunctionHeader}" Foreground="White" TextWrapping="Wrap" TextAlignment="Center" Padding="5,5,5,5" FontSize="12" />
</StackPanel>
</Grid>
</my:MenuButtonBase>
In XAML i reference my usercontrol like this (where the Converter produces the visibility-state correctly):
<my:MenuButtonLarge Name="btnInEuqipment" ButtonVisibility="{Binding Path=User, Converter={StaticResource ConverterUserRightVisibility}, ConverterParameter=5}" VerticalAlignment="Top" FunctionHeader="{lex:Loc Key=MenuButton_InEquipment}" Width="130" ButtonImageSource="/bxSuite.RolloutManager;component/Images/inequipment_48x48.png" BackgroundEnabled="#FF0694FD" BackgroundHover="#FF0072C6" MenuButtonClick="btnInEuqipment_MenuButtonClick" Height="95" Margin="5,10,0,0" />
Try set the visibility of the user control instead of the grid, should work.
Your code should be like this.
<my:MenuButtonBase x:Class="bxSuite.Controls.MenuButtonLarge"
xmlns:my="clr-namespace:bxSuite.Controls"
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"
Visibility="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type UserControl}}, Path=ButtonVisibility}"
Background="Black">
<Grid>
<StackPanel>
<Image Source="{Binding ButtonImageSource}"
Margin="5,10,5,5"
Width="48"
Height="48"
VerticalAlignment="Top"
HorizontalAlignment="Center" />
<TextBlock Text="{Binding FunctionHeader}"
Foreground="White"
TextWrapping="Wrap"
TextAlignment="Center"
Padding="5,5,5,5"
FontSize="12" />
</StackPanel>
</Grid>
Dont forget to update the RelativeSource of your bind.
Related
I'm building a UWP in C# with Visual Studio, and need to hide and show a NavigationView, named 'navigationView' as required.
I am using the property .IsPaneVisible to achieve this, but am encountering a strange bug:
I can set IsPaneVisible = true or false in the xaml document, but if I set navigationView.IsPaneVisible = false; in the related C# document, and run a debug build of the app from Visual Studio, the app crashes with the error
System.ArgumentException: 'The parameter is incorrect.
Even stranger, if I run the same debug build, but launched directly, outside Visual Studio, the app functions normally without crashing at this line.
Does anyone have an idea of why this might be happening or how I could fix it?
Here's the xaml code:
<Page
x:Class="Sheet_Music_Reader.Views.ShellPage"
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:i="using:Microsoft.Xaml.Interactivity"
xmlns:behaviors="using:Sheet_Music_Reader.Behaviors"
xmlns:winui="using:Microsoft.UI.Xaml.Controls"
xmlns:helpers="using:Sheet_Music_Reader.Helpers"
xmlns:views="using:Sheet_Music_Reader.Views"
Loaded="OnLoaded"
mc:Ignorable="d">
<Page.Resources>
<!--This top margin is the height of the custom TitleBar-->
<Thickness x:Key="NavigationViewContentMargin">0,48,0,0</Thickness>
<Thickness x:Key="NavigationViewContentGridBorderThickness">0</Thickness>
<SolidColorBrush x:Key="NavigationViewContentBackground" Color="Transparent"></SolidColorBrush>
</Page.Resources>
<Grid>
<Border x:Name="AppTitleBar"
IsHitTestVisible="True"
VerticalAlignment="Top"
Background="Transparent"
Height="40"
Canvas.ZIndex="1"
Margin="48,8,0,0">
<StackPanel Orientation="Horizontal">
<Image x:Name="AppFontIcon"
HorizontalAlignment="Left"
VerticalAlignment="Center"
Source="Assets/Square44x44Logo.png"
Width="16"
Height="16"/>
<TextBlock x:Name="AppTitle"
Text="enScore"
VerticalAlignment="Center"
Margin="12,0,0,0"
Style="{ThemeResource CaptionTextBlockStyle}"/>
</StackPanel>
</Border>
<winui:NavigationView
IsBackButtonVisible="Visible"
IsBackEnabled="{x:Bind IsBackEnabled, Mode=OneWay}"
SelectedItem="{x:Bind Selected, Mode=OneWay}"
ItemInvoked="OnItemInvoked"
IsSettingsVisible="True"
IsTitleBarAutoPaddingEnabled="False"
DisplayModeChanged="NavigationViewControl_DisplayModeChanged"
Canvas.ZIndex="0"
x:Name="navigationView">
<winui:NavigationView.MenuItems>
<winui:NavigationViewItem x:Uid="Shell_Main" Icon="Copy" helpers:NavHelper.NavigateTo="views:MainPage" />
</winui:NavigationView.MenuItems>
<i:Interaction.Behaviors>
<behaviors:NavigationViewHeaderBehavior
DefaultHeader="{x:Bind Selected.Content, Mode=OneWay}">
<behaviors:NavigationViewHeaderBehavior.DefaultHeaderTemplate>
<DataTemplate>
<Grid x:Name="headerGrid">
<TextBlock
Text="{Binding}"
Style="{ThemeResource TitleTextBlockStyle}"
Margin="{StaticResource SmallLeftRightMargin}" />
<Button Style="{ThemeResource ButtonRevealStyle}" Content="Refresh Library Contents" HorizontalAlignment="Right" Margin="0,45,8,0" Click="RefreshLibrary"/>
<Button Style="{ThemeResource ButtonRevealStyle}" Content="Import PDF To Current Folder" HorizontalAlignment="Right" Margin="0,-35,140,0" Click="AddScore"/>
<Button Style="{ThemeResource ButtonRevealStyle}" Content="Add New Folder" HorizontalAlignment="Right" Margin="0,-35,8,0" Click="AddFolderAsync"/>
<ToggleButton Style="{ThemeResource ToggleButtonRevealStyle}" x:FieldModifier="public" x:Name="tbtndelete" Content="Delete Items" HorizontalAlignment="Right" Margin="0,45,191,0" Tapped="DeleteItem"/>
</Grid>
</DataTemplate>
</behaviors:NavigationViewHeaderBehavior.DefaultHeaderTemplate>
</behaviors:NavigationViewHeaderBehavior>
</i:Interaction.Behaviors>
<Grid>
<Frame x:Name="shellFrame" />
</Grid>
</winui:NavigationView>
</Grid>
</Page>
Try to change the placement of the menu with:
PaneDisplayMode="Top"
For my case with Microsoft.UI.Xaml.Controls for Microsoft.WindowsAppSDK v1.0.0.
the showing/hidding of menu bar works fine.
Left, LeftMinimal, LeftCompact crashes the app.
I know you may expect the menu on the left, but still on the top is not that bad idea ;-) At least it works.. Greetz.
I have a XAML page in a Windows 8.1 Store App. I set the data context for a ListView but I initially have it collapsed. What I am trying to do is toggle the visibility of some of the elements in the ListView before making it visible. But it doesn't load them unless it becomes visible. So, to forced it to load the items, I am trying to set "IsVirtualizing" to false so that I don't have to worry about it (and I don't mind the hit in performance since I won't have that many items). But for all the examples I look at, all I get is
The property "IsVirtualizing" does not have an accessible setter.
Not sure what is going on here.
Here is the relevant piece of code with the other contents stripped out.
<common:LayoutAwarePage
x:Class="FlashMe.DeckView"
DataContext="{Binding DefaultViewModel, RelativeSource={RelativeSource Self}}"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:FlashMe"
xmlns:common="using:FlashMe.Common"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
>
<ScrollViewer x:Name="deckScrollViewer" Grid.Row="1" VerticalScrollMode="Disabled" HorizontalScrollMode="Enabled" HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Disabled" Margin="0,15,0,0">
<StackPanel x:Name="deckStackPanel" Orientation="Horizontal">
<Grid Width="100" x:Name="MarginBuffer" />
<ListView x:Name="cardsListViewDisplay" Visibility="Collapsed" SelectionMode="None" Width="500" ItemsSource="{Binding Path=FlashCardsAsList}" VirtualizingStackPanel.IsVirtualizing="False">
<ListView.ItemTemplate>
<DataTemplate>
<Border>
<StackPanel Orientation="Vertical" Width="490" Height="400" RightTapped="FlashCardRightClicked">
<Grid Width="490" Height="200" Background="Gainsboro">
<TextBlock Text="{Binding Path=Front}"
Foreground="Black"
Style="{StaticResource GroupHeaderTextStyle}"
Margin="4,0,4,4"
FontWeight="SemiBold"
VerticalAlignment="Center"
HorizontalAlignment="Center"
TextWrapping="Wrap"
MaxWidth="410"/>
</Grid>
<Grid Width="500" Height="200" Background="{Binding ElementName=deckStackPanel, Path=DataContext.DeckColorBrush}">
<TextBlock Text="{Binding Path=Back}"
Foreground="White"
Style="{StaticResource GroupHeaderTextStyle}"
Margin="4,0,0,4"
FontWeight="SemiBold"
VerticalAlignment="Center"
HorizontalAlignment="Center"
TextWrapping="Wrap"
MaxWidth="410"/>
</Grid>
</StackPanel>
</Border>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
</StackPanel>
</ScrollViewer>
</common:LayoutAwarePage>
In Windows Store Apps, the IsVirtualizing property is read-only.
From the Remarks section on the VirtualizingStackPanel.IsVirtualizingProperty page on MSDN:
VirtualizingStackPanel.IsVirtualizing is an atypical attached property
because it does not have a Set accessor, and thus is not really a XAML
attached property with a markup usage. Instead,
VirtualizingStackPanel.IsVirtualizing functions as a sentinel whereby
child elements can query the VirtualizingStackPanel parent, and
determine whether virtualization is being used. ...
I have a custom control which contains one text-block, one combo-box and one hyper-link button.
<UserControl x:Class="IXExpress.Controls.WorkspaceIndexes"
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:telerikSdk="http://schemas.telerik.com/2008/xaml/presentation"
mc:Ignorable="d"
Height="Auto" Width="Auto">
<Grid x:Name="LayoutRoot">
<StackPanel Orientation="Vertical" HorizontalAlignment="Center">
<TextBlock x:Name="IndexNameTextBlock" Text="{Binding ApplicationStrings.SelectIndexName, Source={StaticResource ResourceWrapper}, Mode=OneTime}" Margin="3,5" TextAlignment="Left" VerticalAlignment="Center" Visibility="Visible"/>
<StackPanel Orientation="Horizontal" HorizontalAlignment="Left">
<telerikSdk:RadComboBox x:Name="IndexNameCB"
DisplayMemberPath="IndexName"
HorizontalAlignment="Center"
IsDropDownOpen="False"
Margin="3,0,3,5"
MinWidth="150"
Width="150"
VerticalAlignment="Center"
VerticalContentAlignment="Center"
Visibility="Visible"
SelectionChanged="IndexNameCB_SelectionChanged"/>
<HyperlinkButton x:Name="CreateNewIndexLink"
Content="Create New"
VerticalContentAlignment="Center"
Click="CreateNewIndexLink_Click"/>
</StackPanel>
</StackPanel>
</Grid>
</UserControl>
I am using it on another page as following:
<StackPanel Orientation="Vertical">
<customControls:WorkspaceIndexes x:Name="WorkspaceIndexes" IsMoreTextRequired="True" Margin="3"/>
</StackPanel>
The issue is, on some condition when I want to disable this control but it only disables combo-box and hyper-link button.
code:
if (my condition)
WorkspaceIndexes.IsEnabled = true;
else
WorkspaceIndexes.IsEnabled = false;
Result:
http://imgur.com/L6tbOwo
I also don't see IsEnabled option for "IndexNameTextBlock" text-block, Why is that?
You can't see the IsEnabled property for the TextBlock because it doesn't have the property. The other Elements are derived from Control, they can be enabled and disabled. The TextBlock is no Control. Disabling a TextBlock would be meaningless. It just displays text. No user interaction possible.
If you need it to be grayed out you have to change either its Foreground color, or reduce its Opacity, or place a semi-transparent Rectangle/Border over it.
Plain and simple: I need to bind some properties of the ContextMenu items to a property of their parent in the DataTemplate.
I can't find a way to access it because ElementName doesn't work and RelativeSource allows me to use just Self or TemplatedParent.
Here's my code:
<telerikPrimitives:RadDataBoundListBox Grid.Row="2"
Grid.Column="0"
Grid.ColumnSpan="3"
ItemsSource="{Binding Transfers.Keys, Source={StaticResource TransfersManager}, Mode=OneWay}">
<telerikPrimitives:RadDataBoundListBox.ItemTemplate>
<DataTemplate>
<toolkit:TransferControl x:Name="TransferControl"
Header="{Binding Converter={StaticResource TransferMonitorToDocumentTitleConverter}}"
IsContextMenuEnabled="False"
Icon="{Binding Converter={StaticResource TransferMonitorToDocumentIconUriConverter}}"
AutoHide="False"
Monitor="{Binding}"
Language="it-IT"
StatusTextBrush="Black"
Foreground="Black">
<toolkit:TransferControl.HeaderTemplate>
<DataTemplate>
<StackPanel>
<toolkit:ContextMenuService.ContextMenu>
<toolkit:ContextMenu>
<toolkit:MenuItem Header="item1"
IsEnabled="{Binding Monitor Property in the TransferControl object}"
/>
<toolkit:MenuItem Header="item2"/>
</toolkit:ContextMenu>
</toolkit:ContextMenuService.ContextMenu>
<Rectangle Fill="Transparent" Height="30"/>
<ContentControl Content="{Binding}"
HorizontalAlignment="Left"
VerticalAlignment="Center"
Foreground="Black" />
</StackPanel>
</DataTemplate>
</toolkit:TransferControl.HeaderTemplate>
</toolkit:TransferControl>
</DataTemplate>
</telerikPrimitives:RadDataBoundListBox.ItemTemplate>
What I'm trying to bind is:
<toolkit:MenuItem Header="item1"
IsEnabled="{Binding Monitor Property in the TransferControl object}"
/>
and I'd like to bind it to the Monitor property of the <toolkit:TransferControl x:Name="TransferControl" ... /> object.
I was able to solve this my simply creating a new UserControl that holds the content of your ListBox. I used the LongListSelector. Here is a solution that works.
First the XAML for the page:
<phone:LongListSelector Margin="0,0,-12,0" ItemsSource="{Binding Items}">
<phone:LongListSelector.ItemTemplate>
<DataTemplate>
<local:WindowsPhoneControl/>
</DataTemplate>
</phone:LongListSelector.ItemTemplate>
</phone:LongListSelector>
Then the UserControl. This was nothing special, just a wrapper.
<UserControl x:Class="PivotApp1.WindowsPhoneControl"
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:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone"
xmlns:toolkit="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone.Controls.Toolkit"
mc:Ignorable="d"
FontFamily="{StaticResource PhoneFontFamilyNormal}"
FontSize="{StaticResource PhoneFontSizeNormal}"
Foreground="{StaticResource PhoneForegroundBrush}"
d:DesignHeight="480" d:DesignWidth="480">
<Grid x:Name="LayoutRoot" Background="{StaticResource PhoneChromeBrush}">
<phone:LongListSelector x:Name="TransferControl" Margin="0,0,-12,0"
ItemsSource="{Binding Items}"
toolkit:TiltEffect.IsTiltEnabled="True">
<phone:LongListSelector.ItemTemplate>
<DataTemplate>
<Grid>
<toolkit:ContextMenuService.ContextMenu>
<toolkit:ContextMenu>
<toolkit:MenuItem Header="item1"
IsEnabled="{Binding DataContext.Monitor, ElementName=TransferControl}"/>
<toolkit:MenuItem Header="item2"/>
</toolkit:ContextMenu>
</toolkit:ContextMenuService.ContextMenu>
<StackPanel Margin="0,0,0,17">
<TextBlock Text="{Binding LineOne}" TextWrapping="Wrap" Style="{StaticResource PhoneTextExtraLargeStyle}"/>
<TextBlock Text="{Binding LineTwo}" TextWrapping="Wrap" Margin="12,-6,12,0" Style="{StaticResource PhoneTextSubtleStyle}"/>
</StackPanel>
</Grid>
</DataTemplate>
</phone:LongListSelector.ItemTemplate>
</phone:LongListSelector>
</Grid>
</UserControl>
With this solution the Monitor property was hit when rendering the list. It will not be hit when opening the menu. Of course if you fire the propertyChanged for monitor, it will get the value again.
The property you want to bind to seems to be bound to the DataContext itself. Why not just bind to it (the DataContext) in the HeaderTemplate? All you need to do is bind the Header property to the DataContext, instead of converting it to something else, and then use the Converter inside the HeaderTemplate. Something like this:
<telerikPrimitives:RadDataBoundListBox.ItemTemplate>
<DataTemplate>
<toolkit:TransferControl x:Name="TransferControl"
Header="{Binding}"
IsContextMenuEnabled="False"
Icon="{Binding Converter={StaticResource TransferMonitorToDocumentIconUriConverter}}"
AutoHide="False"
Monitor="{Binding}"
Language="it-IT"
StatusTextBrush="Black"
Foreground="Black">
<toolkit:TransferControl.HeaderTemplate>
<DataTemplate>
<StackPanel>
<toolkit:ContextMenuService.ContextMenu>
<toolkit:ContextMenu>
<toolkit:MenuItem Header="item1"
IsEnabled="{Binding}"
/>
<toolkit:MenuItem Header="item2"/>
</toolkit:ContextMenu>
</toolkit:ContextMenuService.ContextMenu>
<Rectangle Fill="Transparent" Height="30"/>
<ContentControl Content="{Binding Converter={StaticResource TransferMonitorToDocumentTitleConverter}}"
HorizontalAlignment="Left"
VerticalAlignment="Center"
Foreground="Black" />
</StackPanel>
</DataTemplate>
</toolkit:TransferControl.HeaderTemplate>
</toolkit:TransferControl>
</DataTemplate>
</telerikPrimitives:RadDataBoundListBox.ItemTemplate>
On a side note, I think you may be doing too much binding. Bindings and converters can lead to bad performance and sometimes it's just faster and easier to do things without bindings.
Btw, may I ask what does the TransferMonitorToDocumentTitleConverter do?
Update
It seems there is a bug in the toolkit. The Header property's getter casts the object to string and so, even though the property is of type object, you can only set it to a string - otherwise an exception is thrown in the getter, which is used internally.
Here's a possible workaround:
Extend the TransferControl like this:
public class TransferControlFixed : TransferControl {
public static readonly DependencyProperty HeaderFixedProperty = DependencyProperty.Register("HeaderFixed", typeof(object), typeof(TransferControlFixed), new PropertyMetadata(null));
public object HeaderFixed {
get {
return GetValue(HeaderFixedProperty);
}
set {
SetValue(HeaderFixedProperty, value);
}
}
public override void OnApplyTemplate() {
base.OnApplyTemplate();
var control = (ContentControl)this.GetTemplateChild("Header");
control.SetBinding(ContentControl.ContentProperty, new Binding() {
Path = new PropertyPath("HeaderFixed"),
Source = this
});
}
}
Use TransferControlFixed instead of TransferControl and bind the HeaderFixed instead of the Header property.
It seems like a reasonably simple workaround.
The question may sound a little confusing, but the problem I'm currently facing is this:
<Button x:Class="sandbox.BtnLabel"
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"
x:Name="this">
<Button.ToolTip>
<TextBlock Background="Yellow" Text="{Binding ElementName=this, Path=LabelText}"/>
</Button.ToolTip>
<TextBlock Background="Yellow" Text="{Binding ElementName=this, Path=LabelText}"/>
</Button>
Only the second binding works, which sets the content of the button. The first one, which I would like to use to set the contents of the tooltip of the button (via the LabelText dependency property) does not work.
Is it possible to make the first binding work?
Thanks.
Try this:
<Button x:Class="sandbox.BtnLabel"
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"
x:Name="this">
<Button.ToolTip>
<ToolTip DataContext="{Binding Path=PlacementTarget, RelativeSource={RelativeSource Self}}">
<TextBlock Background="Yellow"
Text="{Binding LabelText}" />
</ToolTip>
</Button.ToolTip>
<TextBlock Background="Yellow"
Text="{Binding ElementName=this,
Path=LabelText}" />
</Button>
We add a ToolTip element and assign it's DataContext as it's PlacementTarget which should then reach the TextBlock