I am trying to find the index of the StackPanel in an ListView which is filled with an binding to public ObservableCollection<Artikel> Artikels { get; set; } = new ObservableCollection<Artikel>();.
<Window x:Class="KassaBlokboek.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:KassaBlokboek"
mc:Ignorable="d"
WindowState="Maximized" ResizeMode="NoResize"
WindowStyle="None" WindowStartupLocation="CenterScreen"
Title="MainWindow" Height="350" Width="525"
MinWidth="768"
DataContext="{Binding RelativeSource={RelativeSource Self}}">
<Grid>
<Grid.RowDefinitions>
<RowDefinition/>
<RowDefinition Height="7*"/>
</Grid.RowDefinitions>
<Image Source="Resources/LogoNew.jpg" Grid.Row="0" VerticalAlignment="Top" HorizontalAlignment="Left"></Image>
<TextBox PreviewTextInput="TextBox_OnPreviewTextInput" Name="TextBox" KeyDown="ProductScanned" HorizontalAlignment="Center" Grid.Row="0" Width="768" Height="64" VerticalAlignment="Bottom" Margin="0,-25,0,5"></TextBox>
<Grid Grid.Row="1">
<Grid.ColumnDefinitions>
<ColumnDefinition/>
<ColumnDefinition Width="5*"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition/>
<RowDefinition/>
<RowDefinition/>
<RowDefinition/>
<RowDefinition/>
<RowDefinition/>
</Grid.RowDefinitions>
<Button Click="ScrollUp" x:Name="HoofdButton" Grid.Row="0" Grid.Column="0">Product naar boven</Button>
<ListView ScrollViewer.VerticalScrollBarVisibility="Hidden" x:Name="listView" Grid.Row="0" Grid.RowSpan="5" Grid.Column="1"
ItemsSource="{Binding Artikels}">
<ListView.ItemTemplate>
<DataTemplate DataType="local:Artikel">
<Grid Height="{Binding ElementName=HoofdButton, Path=ActualHeight}" HorizontalAlignment="Stretch">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="2*"></ColumnDefinition>
<ColumnDefinition Width="*"></ColumnDefinition>
<ColumnDefinition Width="*"></ColumnDefinition>
<ColumnDefinition Width="*"></ColumnDefinition>
<ColumnDefinition Width="*"></ColumnDefinition>
</Grid.ColumnDefinitions>
<StackPanel Grid.Column="0">
<TextBlock Text="{Binding Naam}"></TextBlock>
<TextBlock Text="{Binding Prijs, StringFormat=€0.00}"></TextBlock>
<TextBlock Text="{Binding Barcode}"></TextBlock>
<TextBlock Text="{Binding Aantal}"></TextBlock>
</StackPanel>
<Button Click="Verwijder" Grid.Column="1">Verwijder</Button>
<Button Click="WijzigAantal" Grid.Column="2" Margin="25,0,0,0">Aantal</Button>
<Button Click="VerhoogAantal" Grid.Column="3" Margin="25,0,0,0">+</Button>
<Button Click="VerlaagAantal" Grid.Column="4" Margin="25,0,0,0">-</Button>
</Grid>
</DataTemplate>
</ListView.ItemTemplate>
<ListView.ItemContainerStyle>
<Style TargetType="ListViewItem">
<Setter Property="HorizontalContentAlignment" Value="Stretch" />
</Style>
</ListView.ItemContainerStyle>
</ListView>
<Button Click="ScrollDown" Grid.Row="4" Grid.Column="0">Product naar beneden</Button>
<StackPanel Grid.Row="5" Grid.Column="1" HorizontalAlignment="Right" Orientation="Horizontal">
<Button Click="BetaalContant" Width="128">Contant</Button>
<Button Width="128" Margin="25,0,0,0" Click="BetaalPinnen">Pinnen</Button>
<Button Width="128" Margin="25,0,0,0" Click="Retour">Retour</Button>
</StackPanel>
<TextBlock x:Name="totaalPrijs" Margin="10,9.8,0,0" Grid.Row="5" Grid.Column="0" Text="Totaalprijs: €0.00"/>
</Grid>
</Grid>
</Window>
I need to find the index of the StackPanel, so i can edit the text in the "Aantal" TextBlock in the StackPanel.
Related
Right now I have this XAML layout for my WPF application:
<Window x:Class="Cabrillo_Editor.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:Cabrillo_Editor"
mc:Ignorable="d"
Title="MainWindow" Height="450" Width="800">
<DockPanel>
<Menu DockPanel.Dock="Top">
<MenuItem Header="_Exit" Click="ExitApplication"/>
<MenuItem Header="_New"/>
<MenuItem Header="_Save" Click="SaveCabrilloFile"/>
</Menu>
<StackPanel>
<GroupBox Height="Auto" Header="General">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="185"/>
<ColumnDefinition Width="10"/>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="10"/>
<ColumnDefinition Width="Auto"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="5"/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<DockPanel Grid.Row="0" Grid.Column="0" Margin="0,0,0,5">
<Label>My Call:</Label>
<TextBox Width="120" Name="CallsignTextBox" HorizontalAlignment="Right" CharacterCasing="Upper"/>
</DockPanel>
<DockPanel Grid.Row="2" Grid.Column="0">
<Label>My Grid:</Label>
<TextBox Width="120" Name="GridTextBox" HorizontalAlignment="Right"/>
</DockPanel>
<DockPanel Grid.Row="0" Grid.Column="2">
<Label>Contest:</Label>
<ComboBox Width="150" Name="ContestComboBox" Margin="5,0,0,0"/>
</DockPanel>
<DockPanel Grid.Row="2" Grid.Column="2">
<Label>Assisted:</Label>
<CheckBox VerticalAlignment="Center" Name="AssistedCheckBox" Margin="5,0,0,0"/>
</DockPanel>
<DockPanel Grid.Row="0" Grid.Column="4">
<Label>Band:</Label>
<ComboBox Width="150" Name="BandComboBox" Margin="5,0,0,0"/>
</DockPanel>
</Grid>
</GroupBox>
</StackPanel>
</DockPanel>
</Window>
And it looks like this:
Why, for example, is are the ComboBoxes so streched if I set the row height to "Auto" (same for the TextBoxes)?
Is there a better way to make consistent horizontal space between the columns?
This is occurring because those controls will stretch to fill their parent container by default. To override this, simply set the VeriticalAlignment property and Height property (if needed).
<ComboBox Width="150" Name="ContestComboBox" Margin="5,0,0,0" VerticalAlignment=Top/>
The ListViewItems are getting their width from the TextBlock element. I want the ListViewItem to fit to the ListView. I have seen in other posts that making HorizontalContentAlignment="Stretch" will fix the issue, but my problem persists. The second TextBlock element in the ItemTemplate is set to WrapWithOverflow.
Sources:
http://www.teixeira-soft.com/bluescreen/2016/03/21/c-how-to-make-a-panel-within-a-datatemplate-fill-the-entire-width-of-a-listview-or-itenscontrol-derivative/
Code:
<UserControl x:Class="XXXX.Views.XXXXView"
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:cal="http://www.caliburnproject.org"
mc:Ignorable="d"
d:DesignHeight="450" d:DesignWidth="800">
<Grid Background="{StaticResource BlackBrush}">
<Grid.RowDefinitions>
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="20*"/>
<ColumnDefinition Width="32*"/>
<ColumnDefinition Width="6*"/>
<ColumnDefinition Width="32*"/>
</Grid.ColumnDefinitions>
<DockPanel Grid.Column="1">
<ListView Grid.Column="1"
x:Name="UniqueShortDescriptions"
VerticalAlignment="Stretch"
ItemsSource="{Binding UniqueShortDescriptions}"
SelectedItem="{Binding SelectedUniqueShortDescriptions}"
cal:Message.Attach="[Event SelectionChanged] = [Action SelectionChanged($this, $eventArgs)]">
<ListView.ItemContainerStyle>
<Style TargetType="ListViewItem">
<Setter Property="HorizontalContentAlignment" Value="Stretch" />
</Style>
</ListView.ItemContainerStyle>
<ListView.ItemTemplate>
<DataTemplate>
<Border BorderBrush="Navy"
BorderThickness="3"
Margin="3"
Padding="2">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition/>
<RowDefinition/>
<RowDefinition/>
</Grid.RowDefinitions>
<TextBlock Grid.RowSpan="3"
Grid.Column="0"
Text="{Binding Path=Date}"
Foreground="Black"
VerticalAlignment="Center"
TextBlock.FontWeight="ExtraBold"/>
<TextBlock Grid.Row="0"
Grid.Column="1"
Text="{Binding Path=LongDescription}" Foreground="{StaticResource BlackBrush}"
TextWrapping="WrapWithOverflow"/>
<!--<TextBlock Text="{Binding Path=ShortExpenseDescription}" Foreground="{StaticResource BlackBrush}"/>-->
<TextBlock Grid.Row="1"
Grid.Column="1"
Text="{Binding Path=Cost}" Foreground="{StaticResource BlackBrush}"/>
<TextBlock Grid.Row="2"
Grid.Column="1"
Text="{Binding Path=Source}" Foreground="{StaticResource BlackBrush}"/>
</Grid>
</Border>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
</DockPanel>
</Grid>
</UserControl>
I got the code you posted to work by simply disabling horizontal scrolling of the ListView.
<ListView ScrollViewer.HorizontalScrollBarVisibility="Disabled" ...
I have created a application for windows 10 (uwp) devices. I´m using the windows appstudio "designer". Now, I have to update the source code by a combobox and the correct eventhandler.
The combobox items contains different urls. After the selection changed, I have to parse entries from a url.
Layout-file:
<Page
x:Class="App.Pages.NeuigkeitenListPage"
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:was_actions="using:AppStudio.Uwp.Actions"
xmlns:was_commands="using:AppStudio.Uwp.Commands"
xmlns:was_controls="using:AppStudio.Uwp.Controls"
xmlns:list_layouts="using:Wallfahrtsapp.Layouts.List"
xmlns:controls="App.Layouts.Controls"
xmlns:vm="using:App.ViewModels"
xmlns:triggers="using:App.Triggers"
DataContext="{Binding RelativeSource={RelativeSource Self}}"
d:DataContext="{d:DesignData Source=/Assets/Design/DesignData.json, Type=vm:DesignViewModel, IsDesignTimeCreatable=true}"
mc:Ignorable="d">
<Page.Resources>
<was_controls:VisualBreakpoints x:Name="ResponsiveBehaviorsVBP" ConfigFile="/Assets/ResponsiveBehaviorsVBP.json"></was_controls:VisualBreakpoints>
</Page.Resources>
<Grid Background="{StaticResource AppBackground}">
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="*"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="Auto"/>
</Grid.ColumnDefinitions>
<Grid Grid.Row="0" Grid.ColumnSpan="2" Background="{StaticResource AppBarBackground}" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Height="48"/>
<TextBlock Grid.Row="0" Grid.Column="0" Margin="{Binding Active.pageTitleMargin, Source={StaticResource ResponsiveBehaviorsVBP}}" Text="{x:Bind ViewModel.PageTitle}" Foreground="{StaticResource AppBarForeground}" FontSize="{StaticResource AppTitleTextSizeDefault}" VerticalAlignment="Center" HorizontalAlignment="Left" TextTrimming="CharacterEllipsis" MaxLines="1"/>
<was_actions:ActionsCommandBar
x:Name="appBar"
ActionsSource="{x:Bind ViewModel.Actions}" Style="{StaticResource WasCommandBarStyle}"
Foreground="{StaticResource AppBarForeground}"
IsVisible="{x:Bind ViewModel.HasActions}"
Background="{StaticResource AppBarBackground}"
Grid.Row="{Binding Active.appBarRow, Source={StaticResource ResponsiveBehaviorsVBP}}"
Grid.Column="{Binding Active.appBarColumn, Source={StaticResource ResponsiveBehaviorsVBP}}"
Grid.ColumnSpan="{Binding Active.appBarColumnSpan, Source={StaticResource ResponsiveBehaviorsVBP}}" Opened="appBar_Opened">
</was_actions:ActionsCommandBar>
<ScrollViewer Grid.Row="1" Grid.Column="0" Grid.ColumnSpan="2">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="3"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<ProgressBar Grid.Row="1" Height="3" Margin="0,6,0,6" IsIndeterminate="True" Foreground="{StaticResource PageTitleForeground}" Visibility="{x:Bind ViewModel.IsBusy, Converter={StaticResource BoolToVisibilityConverter}, FallbackValue=Collapsed, Mode=OneWay}"/>
<was_controls:ErrorNotificationControl x:Uid="ListErrorNotificationControl" Grid.Row="2" ErrorVisibility="{x:Bind ViewModel.HasLoadDataErrors, Converter={StaticResource BoolToVisibilityConverter}, Mode=OneWay}" ErrorColor="{StaticResource PageTitleForeground}" Margin="10,0,18,0"/>
<list_layouts:ListContactCard Grid.Row="1" ItemsSource="{x:Bind ViewModel.Items, Mode=OneWay}" ItemClickCommand="{x:Bind ViewModel.ItemClickCommand}" OneRowModeEnabled="False" Margin="31,0,0,3" Grid.RowSpan="3" />
<ListBox></ListBox>
</Grid>
</ScrollViewer>
<TextBlock HorizontalAlignment="Left"
x:Name="source"
TextWrapping="Wrap"
Text="Newsquelle auswählen:"
VerticalAlignment="Top"
FontFamily="Segoe UI"
FontStyle="Oblique"
Padding="40" Margin="384,-30,0,0" Height="78"
/>
<ComboBox x:Name="sourceComboBox"
HorizontalAlignment="Center"
VerticalAlignment="Top"
Width="200"
SelectionChanged="selectionChanged"
>
<ComboBoxItem Content="Url1"/>
<ComboBoxItem Content="Url2"/>
</ComboBox>
<controls:DataUpdateInformationControl Grid.Row="2" Grid.ColumnSpan="2" LastUpdateDateTime="{x:Bind ViewModel.LastUpdated, Mode=OneWay}" Color="{StaticResource PageTitleForeground}" Margin="8,4,8,4" HorizontalAlignment="Left" HasLocalData="{x:Bind ViewModel.HasLocalData}"/>
</Grid>
C#- file: Eventhandler
private void selectionChanged (object sender , SelectionChangedEventArgs args)
{
index = sourceComboBox.SelectedIndex;
Debug.WriteLine("selectionChangedEventMethod");
newsblogHTTP(index);
}
But how can I update my layout with the new content?
If you need more code snippets let´s see the repo for my project.
layout-file : https://github.com/MasterCoder1992/BlutWallfahrtWindows10/blob/version/march2k17Y/Wallfahrtsapp.W10/Pages/NeuigkeitenListPage.xaml
https://github.com/MasterCoder1992/BlutWallfahrtWindows10/blob/version/march2k17Y/Wallfahrtsapp.W10/Pages/NeuigkeitenListPage.xaml.cs
C#-Config file:
https://github.com/MasterCoder1992/BlutWallfahrtWindows10/blob/version/march2k17Y/Wallfahrtsapp.W10/Sections/NeuigkeitenConfig.cs
Thanks for your help!
how can I make the scrollviewer resize to the bottom edge of the screen, so as to maximize to resize with the mouse ? The way the code is, when the screen is maximized the scroll bar does not appear and it is not possible to scroll the contents.
My xaml File
<Window x:Class="AppSearch.MainWindow" x:Name="mainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="AppSearch" Height="600" Width="820"
WindowStartupLocation="CenterScreen"
Loaded="Window_Loaded"
StateChanged="mainWindow_StateChanged"
ResizeMode="CanResize"
PreviewKeyDown="mainWindow_PreviewKeyDown">
<Grid ShowGridLines="False">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="auto"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<StackPanel x:Name="stkContentLeft"
MinWidth="510"
MinHeight="560"
ScrollViewer.VerticalScrollBarVisibility="Hidden"
LoadCompleted="stkContentLeft_LoadCompleted"
VerticalAlignment="Stretch"
HorizontalAlignment="Stretch"
Margin="0,0,05,0" Grid.Column="0"/>
<StackPanel Grid.Column="1" x:Name="stckContentRight" Width="276"
Height="{Binding Parent.ActualHeight, Mode=OneWay, RelativeSource={RelativeSource Self}}"
Orientation="Vertical"
HorizontalAlignment="Right">
<Grid VerticalAlignment="Top">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="auto"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="auto"/>
<RowDefinition Height="auto"/>
</Grid.RowDefinitions>
<StackPanel Height="auto" Grid.Row="0">
<StackPanel x:Name="help" Width="20" Height="20" HorizontalAlignment="Right" Margin="0,5,10,0">
<Image Source="Imagens/help_icon.png"/>
</StackPanel>
<StackPanel x:Name="stkUcSupervisor" Height="50" Width="276" Margin="0,5,0,0" HorizontalAlignment="Center"/>
<TextBox x:Name="txtSearch"
ToolTip="put your key..."
FontSize="13"
Foreground="Black"
BorderThickness="1"
TextWrapping="Wrap"
Margin="0,5,0,05" Width="270" HorizontalAlignment="Center"/>
</StackPanel>
<ScrollViewer x:Name="scroll"
CanContentScroll="True"
IsDeferredScrollingEnabled="False"
UseLayoutRounding="False"
VerticalScrollBarVisibility="Visible"
VerticalAlignment="Top"
BorderThickness="1"
BorderBrush="Gray"
Margin="0,05,0,0"
Grid.Row="1"
Height="455">
<StackPanel x:Name="stkListOfUserControls"
CanVerticallyScroll="True"
Height="455"
OverridesDefaultStyle="False">
<StackPanel.ScrollOwner>
<ScrollViewer AllowDrop="True" />
</StackPanel.ScrollOwner>
</StackPanel>
</ScrollViewer>
</Grid>
</StackPanel>
<StackPanel x:Name="stkPopUp"
Canvas.Bottom="0"
Canvas.Left="0"
Height="285"
Width="280"
VerticalAlignment="Bottom"/>
</Grid>
In my WPF window (.NET 4.0) I have Grid with two columns: stretched textbox (or whatever) on the left side and Expander on the right. Also in Expander I have GridSplitter, which is intended to resize both left and right columns when Expander is expanded. But it doesn't work.
This is my XAML code:
<Window x:Class="WpfApplication10.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">
<Grid ShowGridLines="True" >
<Grid.ColumnDefinitions>
<ColumnDefinition />
<ColumnDefinition Width="Auto" Name="column"/>
</Grid.ColumnDefinitions>
<TextBox Grid.Column="0" HorizontalAlignment="Stretch" TextWrapping="Wrap"
Text="TextBox" VerticalAlignment="Stretch" Background="Aqua"/>
<Expander Grid.Column="1" Header="Expander" ExpandDirection="Left"
HorizontalAlignment="Right" Background="LightBlue" >
<Expander.Content>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="5"/>
<ColumnDefinition Width="Auto"/>
</Grid.ColumnDefinitions>
<TextBlock Text="Some text Some text Some Text" Grid.Column="1"/>
<GridSplitter Grid.Column="0" Width="5"
ResizeBehavior="PreviousAndCurrent"
ResizeDirection="Columns"
HorizontalAlignment="Stretch"/>
</Grid>
</Expander.Content>
</Expander>
</Grid></Window>
Appropriate solution is found.
XAML:
<Window x:Class="WpfApplication10.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">
<Window.Resources>
<BooleanToVisibilityConverter x:Key="BoolToVisConverter"/>
</Window.Resources>
<Grid ShowGridLines="True">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" Name="leftColumn"/>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="Auto" Name="rightColumn" />
</Grid.ColumnDefinitions>
<TextBox Grid.Column="0"
HorizontalAlignment="Stretch"
TextWrapping="Wrap"
Text="TextBox"
VerticalAlignment="Stretch"
Background="Aqua" />
<Expander Grid.Column="2"
Name="Expander"
Header="Expander"
ExpandDirection="Left"
Background="LightBlue"
Collapsed="Expander_Collapsed"
Expanded="Expander_Expanded" >
<TextBlock Text="Some text Some text Some Text" />
</Expander>
<GridSplitter Grid.Column="1"
Width="5"
ResizeBehavior="PreviousAndNext"
ResizeDirection="Columns"
VerticalAlignment="Stretch"
Height="Auto"
Visibility="{Binding ElementName=Expander, Path=IsExpanded,
Converter={StaticResource BoolToVisConverter}}"/>
</Grid></Window>
Code-behind:
private void Expander_Collapsed(object sender, RoutedEventArgs e)
{
leftColumn.Width = new GridLength(1, GridUnitType.Star);
rightColumn.Width = new GridLength(1, GridUnitType.Auto);
}
private void Expander_Expanded(object sender, RoutedEventArgs e)
{
rightColumn.Width = new GridLength(1, GridUnitType.Star);
}
Your grid splitter works on the inner grid (in expander) and not on the main grid. Try this:
<Window x:Class="WpfApplication10.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">
<Grid ShowGridLines="True">
<Grid.ColumnDefinitions>
<ColumnDefinition />
<ColumnDefinition Width="5" />
<ColumnDefinition Width="Auto"
Name="column" />
</Grid.ColumnDefinitions>
<TextBox Grid.Column="0"
HorizontalAlignment="Stretch"
TextWrapping="Wrap"
Text="TextBox"
VerticalAlignment="Stretch"
Background="Aqua" />
<Expander Grid.Column="2"
Header="Expander"
ExpandDirection="Left"
Background="LightBlue">
<TextBlock Text="Some text Some text Some Text" />
</Expander>
<GridSplitter Grid.Column="1"
Width="5"
ResizeBehavior="PreviousAndNext"
ResizeDirection="Columns"
VerticalAlignment="Stretch"
Height="Auto" />
</Grid>
</Window>
Now you'd need to handle what happens to the last column when the user expands/collapses the expander.
Try this, if it helps to resolve your problem.
<Window x:Class="WpfApplication1.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">
<Grid ShowGridLines="True" >
<Grid.ColumnDefinitions>
<ColumnDefinition />
<ColumnDefinition Width="Auto" Name="column"/>
</Grid.ColumnDefinitions>
<TextBox Grid.Column="0" HorizontalAlignment="Stretch" TextWrapping="Wrap"
Text="TextBox" VerticalAlignment="Stretch"/>
<Expander Grid.Column="1" Header="Expander" ExpandDirection="Left"
HorizontalAlignment="Right">
<Expander.Content>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="5"/>
<ColumnDefinition Width="Auto"/>
</Grid.ColumnDefinitions>
<TextBlock Text="Some text Some text Some Text" Grid.Column="0"/>
<GridSplitter Grid.Column="1" Width="5"
ResizeBehavior="PreviousAndCurrent"
ResizeDirection="Columns"
HorizontalAlignment="Stretch"/>
</Grid>
</Expander.Content>
</Expander>
</Grid>