WPF Overlay Outside Parent - c#

I have the following example:
<Window x:Class="WpfOverlayTest.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="400" Width="600">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<Grid Grid.Row="0" Width="600" Height="200" Background="LightBlue">
<Grid Margin="0,125,0,0" Height="75" Width="200" Background="Red">
<Grid Margin="0,75,0,0" Background="Black" Height="20" Width="200" />
</Grid>
</Grid>
<Grid Grid.Row="1" Height="200" Width="600" Background="LightGreen" />
</Grid>
How can I make the Black Grid being displayed?
edit:
To make the Problem a bit more clear:
I Want to define the Black Grid inside the Red Grid, but it should be displayed over the Green Grid.
See the Red Grid as a UserControl and the Black Grid as a Menu Overlay.


Sometimes I see questions and answers here that I just can't believe. If you want to put two or more elements into one Grid.Row or Column, then just set their Grid.Row values to the same value. The lower the element is defined in the XAML, the further in front the element will be in the UI. So to add the black Grid on top of the green Grid, you can just do this:
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<Grid Grid.Row="0" Width="600" Height="200" Background="LightBlue">
<Grid Margin="0,125,0,0" Height="75" Width="200" Background="Red">
</Grid>
</Grid>
<Grid Grid.Row="1" Height="200" Width="600" Background="LightGreen" />
<Grid Grid.Row="1" Background="Black" VerticalAlignment="Center"
Height="20" Width="200" /> <!-- This will be on top -->
</Grid>
UPDATE
It's pretty difficult to work out what you actually want, but after reading the comments, it seems as though you might want this instead:
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<Grid Grid.Row="0" Width="600" Height="200" Background="LightBlue">
<Grid Margin="0,125,0,0" Height="75" Width="200" Background="Red">
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<Grid Grid.Row="0" Background="Black" VerticalAlignment="Center" Height="20" Width="200" />
</Grid>
</Grid>
<Grid Grid.Row="1" Height="200" Width="600" Background="LightGreen" />
</Grid>
This is basic Grid stuff. I recommend the material in the Grid Class page on MSDN.
UPDATE 2
Now that you have provided a description of your problem in your question, I can finally provide the correct XAML for your requirements:
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<Grid Grid.Row="0" Width="600" Height="200" Background="LightBlue" />
<Grid Grid.Row="1" Height="200" Width="600" Background="LightGreen" />
<Grid Grid.Row="1" VerticalAlignment="Center" Height="75" Width="200" Background="Red">
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<!-- This will be on top -->
<Grid Grid.Row="0" Background="Black" VerticalAlignment="Center" Height="20" Width="200" />
</Grid>
</Grid>


Set a RowDefinition on your Red grid and assign the Black Grid to it
<Canvas>
<Grid Width="600" Height="200" Background="LightBlue">
</Grid>
<Grid Margin="0,200,0,0" Height="175" Width="600" Background="LightGreen" />
<Grid Margin="200,125,0,0" Height="100" Width="200" Background="Red">
<Grid Margin="0,75,0,0" Background="Black" Height="20" Width="200" />
</Grid>
</Canvas>
EDIT: Added a screenshot
EDIT: Switched to a Canvas

Related

How can I vertically stretch a WPF user control and its components while stretching its parent window

I have a user control with a text box and 2 buttons below it. I want the text box to stretch vertically when the parent window stretches vertically but nothing happens. Another problem is that the buttons appear bunched up under the text box when the user control is put into a window. But when I view the user control while not in a window the buttons are separated by 1 grid row. How can I get this to work properly so the text box increases in size when the parent window is stretched vertically and also have the buttons at the bottom stay away from the text box?
Here is the xaml code for the window that uses the user control:
<Window x:Class="SerialNumTool.Views.test2View"
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:SerialNumTool.UserControls"
mc:Ignorable="d"
Title="test2View" Height="300" Width="300"
VerticalAlignment="Stretch">
<Grid Margin="0,0,0,0" Background="Cyan" >
<Grid.ColumnDefinitions>
<ColumnDefinition Width=".5*"/>
<ColumnDefinition Width=".5*"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height=".20*"/>
<RowDefinition Height=".20*"/>
<RowDefinition Height=".20*"/>
<RowDefinition Height=".20*"/>
<RowDefinition Height=".20*"/>
</Grid.RowDefinitions>
<StackPanel Name="MainContentAreaStackPanel" Margin="0" VerticalAlignment="Stretch"
HorizontalAlignment="Stretch"
Grid.Row="1" Grid.RowSpan="3" Grid.Column="0" Grid.ColumnSpan="2">
<local:UserControl2 VerticalAlignment="Stretch"
HorizontalAlignment="Stretch">
</local:UserControl2>
</StackPanel>
</Grid>
</Window>
Here is the user control code:
<UserControl x:Class="SerialNumTool.UserControls.UserControl2"
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:local="clr-namespace:SerialNumTool.UserControls"
mc:Ignorable="d"
d:DesignHeight="150" d:DesignWidth="200"
VerticalAlignment="Stretch">
<Grid Margin="0,0,0,0" Background="Beige" >
<Grid.ColumnDefinitions>
<ColumnDefinition Width=".5*"/>
<ColumnDefinition Width=".5*"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height=".20*"/>
<RowDefinition Height=".20*"/>
<RowDefinition Height=".20*"/>
<RowDefinition Height=".20*"/>
<RowDefinition Height=".20*"/>
</Grid.RowDefinitions>
<StackPanel Background="Green" Grid.Column="0" Grid.ColumnSpan="1" Grid.Row="1" Grid.RowSpan="2">
<TextBox x:Name="TextOutputAreaTextBox"
HorizontalAlignment="Stretch" Margin="5"
VerticalAlignment="Stretch" AcceptsReturn="True"
VerticalScrollBarVisibility="Auto"
TextWrapping="Wrap" />
</StackPanel>
<StackPanel Orientation="Horizontal" Background="Green" Grid.Column="0" Grid.ColumnSpan="2"
Margin="0,0,0,0" Grid.Row="4" Grid.RowSpan="1" HorizontalAlignment="Stretch" >
<Button Content="Operation 2" Margin="5"></Button>
<Button Content="Operation 3" Margin="5"></Button>
</StackPanel>
</Grid>
</UserControl>
Thanks in advance.

You can greatly simplify your markup by using just grids.
You seem to have misunderstood the way the * gridmeasure works.
I think the markup below does what you're trying to achieve.
When you put most controls in a grid(cell) they will expand to take up all the space available. That's what you want here so all you want is grids and cells.
The * is not an abstracted measure of the actual height in the way you are using it.
You had a control spanning two rows.
I simplified that by making one of the rows 2* height.
If you wanted two controls in the right column next to it then you would of course probably want 5 rows. But you don't have that.
xmlns:local="clr-namespace:wpf_99"
mc:Ignorable="d"
Title="MainWindow" Height="350" Width="525"
>
<Grid Background="Cyan" >
<local:UserControl2/>
</Grid>
</Window>
and
d:DesignHeight="450" d:DesignWidth="800">
<Grid Background="Beige" >
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="2*"/>
<RowDefinition Height="*"/>
<RowDefinition Height="*"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<TextBox x:Name="TextOutputAreaTextBox"
HorizontalAlignment="Stretch"
Margin="5"
VerticalAlignment="Stretch"
AcceptsReturn="True"
VerticalScrollBarVisibility="Auto"
TextWrapping="Wrap" />
<Button Content="Operation 2" Margin="5" Grid.Row="4"></Button>
<Button Content="Operation 3" Margin="5" Grid.Row="4" Grid.Column="1"></Button>
</Grid>
</UserControl>

Henk Holterman's comment to remove the StackPanel around the text solves the problem. The textbox would not vertically stretch in or outside a user control while inside a StackPanel. I had to remove the StackPanel around the textbox in the user control as well as in the window that used the user control. Below are the code updates for a working sample:
The User Control with StackPanel removed:
<UserControl x:Class="SerialNumTool.UserControls.UserControl2"
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:local="clr-namespace:SerialNumTool.UserControls"
mc:Ignorable="d"
d:DesignHeight="150" d:DesignWidth="200"
VerticalAlignment="Stretch">
<Grid Margin="0,0,0,0" Background="Beige" >
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="*"/>
<RowDefinition Height="2*"/>
<RowDefinition Height="*"/>
<RowDefinition Height="*"/>
<RowDefinition Height="2*"/>
</Grid.RowDefinitions>
<TextBox x:Name="TextOutputAreaTextBox" Grid.Column="0" Grid.Row="1"
HorizontalAlignment="Stretch" Margin="5"
VerticalAlignment="Stretch" VerticalContentAlignment="Stretch"
AcceptsReturn="True"
VerticalScrollBarVisibility="Auto"
TextWrapping="Wrap" />
<StackPanel Orientation="Horizontal" Background="Green" Grid.Column="0" Grid.ColumnSpan="2"
Margin="0,0,0,0" Grid.Row="4" Grid.RowSpan="1" HorizontalAlignment="Stretch" >
<Button Content="Operation 2" Margin="5"></Button>
<Button Content="Operation 3" Margin="5"></Button>
</StackPanel>
</Grid>
</UserControl>
Here is the window that used the user control:
<Window x:Class="SerialNumTool.Views.test2View"
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:SerialNumTool.UserControls"
mc:Ignorable="d"
Title="test2View" Height="300" Width="300"
VerticalAlignment="Stretch">
<Grid Margin="0,0,0,0" Background="Cyan" >
<Grid.ColumnDefinitions>
<ColumnDefinition Width=".5*"/>
<ColumnDefinition Width=".5*"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height=".20*"/>
<RowDefinition Height=".20*"/>
<RowDefinition Height=".20*"/>
<RowDefinition Height=".20*"/>
<RowDefinition Height=".20*"/>
</Grid.RowDefinitions>
<local:UserControl2 VerticalAlignment="Stretch"
HorizontalAlignment="Stretch"
Grid.Row="1" Grid.RowSpan="3" Grid.Column="0" Grid.ColumnSpan="2">
</local:UserControl2>
</Grid>
</Window>

How to keep page header sticky when soft keyboard shows?

I have a very simple page with a header and several textboxes in my UWP app:
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<TextBlock Grid.Row="0" Text="Page Title!" />
<ScrollViewer Grid.Row="1" VerticalScrollMode="Auto">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<TextBox Grid.Row="0" Margin="20" />
<TextBox Grid.Row="1" Margin="20" />
<TextBox Grid.Row="2" Margin="20" />
<TextBox Grid.Row="3" Margin="20" />
<TextBox Grid.Row="4" Margin="20" />
</Grid>
</ScrollViewer>
</Grid>
In Windows 10 mobile, when the bottom textbox get focus and soft keyboard appears, the full content of the page is scrolling up and I don't want this. I want the header to remain visible and the scrollviewer scrolls to the textbox to keep in view.
How can I achive this?
Thanks in advance.

You can use the CommandBar and add the TextBlock into CommandBar.Content, then the header will remain visible in the page. The page xaml code should look like this,
<Page.TopAppBar>
<CommandBar Background="Transparent" OverflowButtonVisibility="Collapsed">
<CommandBar.Content>
<TextBlock Text="Page Title!" Margin="20" />
</CommandBar.Content>
</CommandBar>
</Page.TopAppBar>
<Grid>
<ScrollViewer VerticalScrollMode="Auto">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<TextBox Grid.Row="0" Margin="20" />
<TextBox Grid.Row="1" Margin="20" />
<TextBox Grid.Row="2" Margin="20" />
<TextBox Grid.Row="3" Margin="20" />
<TextBox Grid.Row="4" Margin="20" />
</Grid>
</ScrollViewer>
</Grid>

Why UserControl isn't filling VerticalContentAlignment 'Stretch'?

Here is the parent Xaml:
<Grid VerticalAlignment="Stretch">
<Grid.RowDefinitions>
<RowDefinition Height="20" />
<RowDefinition Height="*" /><!-- Should stretch vertically -->
</Grid.RowDefinitions>
<DockPanel Grid.Row="0">
<!-- Menu definition removed for brevity -->
</DockPanel>
<DockPanel Grid.Row="1"
VerticalAlignment="Stretch"
LastChildFill="True">
<ItemsControl DockPanel.Dock="Top"
ItemsSource="{Binding Designer}"
HorizontalAlignment="Stretch"
HorizontalContentAlignment="Stretch"
VerticalAlignment="Stretch"
VerticalContentAlignment="Stretch"
Background="YellowGreen"/>
</DockPanel>
</Grid>
The ItemsSource binding is to an ObservableCollection. When the view is added to the collection, it gets updated in the main shell (view). Here is the UserControl that is added:
<UserControl x:Class="Prototype.StateMachineDesignerApp.Views.ProjectDesigner"
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:local="clr-namespace:Prototype.StateMachineDesignerApp.Views"
mc:Ignorable="d"
d:DesignHeight="300" d:DesignWidth="500"
HorizontalAlignment="Stretch"
HorizontalContentAlignment="Stretch"
VerticalAlignment="Stretch"
VerticalContentAlignment="Stretch"
Margin="0">
<Grid VerticalAlignment="Stretch">
<Grid.RowDefinitions>
<RowDefinition Height="20" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<Border Grid.Row="0"
BorderBrush="DimGray"
BorderThickness="1"
Background="LightSlateGray"
Margin="1" />
<Border Grid.Row="1"
Margin="1">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="1*" />
<ColumnDefinition Width="3" />
<ColumnDefinition Width="5*" />
</Grid.ColumnDefinitions>
<Border Grid.Column="0"
BorderBrush="DarkGoldenrod"
BorderThickness="1" />
<GridSplitter Grid.Column="1"
HorizontalAlignment="Stretch"
VerticalAlignment="Stretch" />
<Border Grid.Column="2"
BorderBrush="DarkGoldenrod"
BorderThickness="1" />
</Grid>
</Border>
</Grid>
</UserControl>
The UserControl is not filling the entire vertical space:
Row[1] of the outermost Grid is stretching vertically as is evidenced by the ItemsControl.Background filling the area.
For reference, this is what I am expecting:
For what its worth, I've looked at numerous questions on SO regarding this exact issue but none of the solutions seem to help. Then again, none of the examples I saw used an ItemsControl with binding.

This happens because the ItemsControl throw all of our items into a vertically aligned StackPanel by default. It's very easy to change though, since the ItemsControl allows you to change which panel type is used to hold all the items.
<ItemsControl DockPanel.Dock="Top"
ItemsSource="{Binding Designer}"
HorizontalAlignment="Stretch"
HorizontalContentAlignment="Stretch"
VerticalAlignment="Stretch"
VerticalContentAlignment="Stretch"
Background="Transparent">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<Grid />
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
</ItemsControl>

WPF: TreeView height

I'm using a TreeView in WPF that has an explicit height set. The vertical scrollbar is cut off at the bottom (independent of whether items are bound/shown or not; I've enabled the scrollbar to be able to reproduce the problem without items attached). XAML source below.
<Window x:Class="demo.TreeViewProblem"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="..."
ResizeMode="CanResizeWithGrip"
SizeToContent="WidthAndHeight">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="150"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition />
<RowDefinition />
<RowDefinition />
<RowDefinition />
<RowDefinition />
</Grid.RowDefinitions>
<TextBlock
Grid.Column="0"
Grid.Row="0"
Margin="5,10,5,5"
Text="Some label"/>
<TextBlock
Grid.Column="1"
Grid.Row="0"
Margin="5,10,5,5"
Text="Some value"/>
<TreeView
ScrollViewer.VerticalScrollBarVisibility="Visible"
Grid.Column="1"
Grid.Row="1"
Height="200"
MinHeight="200"
Width="300"
Margin="5,10,5,5"
VerticalAlignment="Top" />
<TextBlock
Grid.Column="0"
Grid.Row="2"
Margin="5,10,5,5"
Text="Some label"/>
<TextBox
Grid.Column="1"
Grid.Row="2"
Width="80"
Margin="5,10,5,5"
HorizontalAlignment="Left"
Text="Some value"/>
<TextBlock
Grid.Column="0"
Grid.Row="3"
Margin="5,10,5,5"
Text="Some label"/>
<TextBox
Grid.Column="1"
Grid.Row="3"
Width="80"
Margin="5,10,5,5"
HorizontalAlignment="Left"
Text="Some value"/>
<Button
HorizontalAlignment="Center"
Margin="10,10,10,10"
Content="Close"
Grid.ColumnSpan="2"
Grid.Column="0"
Grid.Row="4"/>
</Grid>
</Window>

Change the RowDefinition for the row containing your TreeView to this:
<RowDefinition Height="Auto" />
When set to "Auto", the row will calculate how much space it needs.
EDIT: Alternatively, you could set the other rows to Auto and then make your TreeView stretch instead. With this approach your window will scale nicer when the user resizes it.
From the row definitions:
<RowDefinition Height="Auto" />
<RowDefinition Height="*" />
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
From the tree:
<TreeView VerticalAlignment="Stretch"
... />

Tabcontrol in WPF C#

now I'm using the tabcontrol to arrange my UI. At the first, I put my button outside my tabcontrol; however, when I put the button into the tabcontrol, it gave message, Object reference not set to an object instance. Does anyone know why I got this message ?
edited
Below is my xaml:
<Window x:Class="StudySystem.Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="UI" Height="600" Width="811" mc:Ignorable="d" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:my="clr-namespace:StudySystem" Loaded="Window_Loaded">
<Grid Width="791">
<Grid.RowDefinitions>
<RowDefinition Height="129*" />
<RowDefinition Height="432*" />
</Grid.RowDefinitions>
<TabControl Margin="2,0,0,42">
<TabItem Header="Book Info" >
<Grid ShowGridLines="False">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="100" />
<ColumnDefinition Width="150" />
<ColumnDefinition Width="150" />
<ColumnDefinition Width="178*" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="22*" />
</Grid.RowDefinitions>
<TextBlock Text="Book Code:" Height="25" Margin="0,15,0,45"></TextBlock>
<TextBox Name="txtCode" Grid.Column="1" Margin="2,15,0,51"
Width="148"></TextBox>
<TextBlock Grid.Row="1" Text="Title:" Margin="0,1,0,33" Height="18"></TextBlock>
<TextBox Name="txtTitle" Grid.Row="1" Grid.Column="1" Margin="2,1,148,32" Grid.ColumnSpan="2"></TextBox>
<TextBlock Grid.Row="3" Text="Author:" Margin="0,5,0,33" Height="17"></TextBlock>
<TextBox Name="txtAuthor" Grid.Row="3" Grid.Column="1" Margin="0,6,0,30"></TextBox>
<Button Content="OK" Grid.Row="4" Grid.Column="1" Margin="0,1,0,37"></Button>
</Grid>
</TabItem>
</TabControl>
</Grid>
</Window>

I've seen this before, its code that references things in your form before you create the form. Check the order of what you are calling.

Inside Windows tag i have added this code and for me its working fine...
<Grid Width="auto">
<Grid.RowDefinitions>
<RowDefinition Height="*" />
<RowDefinition Height="432*" />
</Grid.RowDefinitions>
<TabControl Grid.Row="1">
<TabItem Header="Book Info" >
<Grid ShowGridLines="False">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="100" />
<ColumnDefinition Width="150" />
<ColumnDefinition Width="150" />
<ColumnDefinition Width="178*" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="22*" />
</Grid.RowDefinitions>
<TextBlock Text="Book Code:" Height="25" Margin="0,15,0,45"> </TextBlock>
<TextBox Name="txtCode" Grid.Column="1" Margin="2,15,0,51"
Width="148"></TextBox>
<TextBlock Grid.Row="1" Text="Title:" Margin="0,1,0,33" Height="18"></TextBlock>
<TextBox Name="txtTitle" Grid.Row="1" Grid.Column="1" Margin="2,1,148,32" Grid.ColumnSpan="2"></TextBox>
<TextBlock Grid.Row="3" Text="Author:" Margin="0,5,0,33" Height="17"></TextBlock>
<TextBox Name="txtAuthor" Grid.Row="3" Grid.Column="1" Margin="0,6,0,30"></TextBox>
<Button Content="OK" Grid.Row="4" Grid.Column="1" Margin="0,1,0,37"></Button>
</Grid>
</TabItem>
</TabControl>
</Grid>
what you have mentioned in window_loaded??

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