CODEWITHSUNDEEP
c#wpf
dangeroushobo
dangeroushobo

Reputation: 1401

WPF DockPanel not showing bottom component

I'm new to WPF and I'm trying to create a Window with two text boxes, the RichTextBox at the top, which uses most of the available space, and a TextBox at the bottom. My issue is the TextBox at the bottom is not showing. I have it at the bottom of the DockPanel. What am I missing?

Where is the XAML:

<Window x:Class="WpfApp1.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:WpfApp1"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="750" MinHeight="400" MinWidth="600" Background="Black">
    <DockPanel
        Margin="5" 
        Height="Auto"
        Width="Auto">

        <RichTextBox 
            Name="richTB" 
            IsEnabled="True" 
            VerticalScrollBarVisibility="Visible" 
            IsReadOnly="True">

            <FlowDocument 
                Name="flowDoc"
                PagePadding="0">

                <Paragraph>
                    <Run Text="Test" Foreground="Red"></Run>
                    <Run Text="Foo" Foreground="Blue"></Run>
                </Paragraph>
            </FlowDocument>
        </RichTextBox>

        <TextBox 
            Name="textBox" 
            KeyDown="EnterPressed"
            Background="Plum"
            DockPanel.Dock="Bottom">

        </TextBox>
    </DockPanel>
</Window>

Upvotes: 0

Views: 522

Answers (2)

Stefan
Stefan

Reputation: 652

You textbox has no content. The dockpanel sizes its components to the needed size, but because it has no content it has no visible size.

Place some text in it and it will show.

Upvotes: 0

Steve
Steve

Reputation: 2343

You may have to reorder the children of the DockPanel. The last child fill uses the Last child in the list of children, it isn't based on where the children are laid out within the DockPanel.

<Window x:Class="WpfApp1.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:WpfApp1"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="750" MinHeight="400" MinWidth="600" Background="Black">
    <DockPanel
        Margin="5" 
        Height="Auto"
        Width="Auto">

        <TextBox 
            Name="textBox" 
            KeyDown="EnterPressed"
            Background="Plum"
            DockPanel.Dock="Bottom">
        </TextBox>

        <RichTextBox 
            Name="richTB" 
            IsEnabled="True" 
            VerticalScrollBarVisibility="Visible" 
            IsReadOnly="True">

            <FlowDocument 
                Name="flowDoc"
                PagePadding="0">

                <Paragraph>
                    <Run Text="Test" Foreground="Red"></Run>
                    <Run Text="Foo" Foreground="Blue"></Run>
                </Paragraph>
            </FlowDocument>
        </RichTextBox>
    </DockPanel>
</Window>

Upvotes: 2

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