How do I get my WPF Textbox to insert value in a variable and show it in a textarea?

Question

I am quite new to WPF and I am wondering if someone could help me with this problem I am having. I am trying to get my TextBox to be able to give a value to a string variable.

This is the C# code:

public partial class MainWindow : Window
{
    string player;

    public string PlayerName
    {
        get { return (string)GetValue(Property); }
        set { SetValue(Property, value); }
    }

    private void Button_Click(object sender, RoutedEventArgs e)
    {
        player = user.Text;
    }

    public static readonly DependencyProperty Property =
        DependencyProperty.Register("PlayerName", typeof(string), typeof(MainWindow), new PropertyMetadata(string.Empty));

    public MainWindow()
    {
        InitializeComponent();
        this.DataContext = this;
        this.PlayerName = player;
    }
}

And this is the Xaml code:

<Window x:Class="memorytest.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:memorytest"
    mc:Ignorable="d"
    Title="MainWindow" Height="450" Width="800">
<Grid>
    <TextBlock Text="{Binding Path=PlayerName, UpdateSourceTrigger=PropertyChanged}" Margin="10,10,199.6,240" />
    <TextBox x:Name="user" VerticalAlignment="Center" />
    <Button Content="Click Me" VerticalAlignment="Bottom" Click="Button_Click" />  
</Grid>

From other sources that I have read it seems that player = user.Text; is enough for that, but it won't display the variable in the textarea.

If someone could help me with this I would appreciate it.

Answer 1

The Button Click handler should directly set the PlayerName property. The player field is not needed.

public partial class MainWindow : Window
{
    public string PlayerName
    {
        get { return (string)GetValue(Property); }
        set { SetValue(Property, value); }
    }

    private void Button_Click(object sender, RoutedEventArgs e)
    {
        PlayerName = user.Text;
    }

    public static readonly DependencyProperty Property =
        DependencyProperty.Register("PlayerName", typeof(string), typeof(MainWindow), new PropertyMetadata(string.Empty));

    public MainWindow()
    {
        InitializeComponent();
        this.DataContext = this;
    }
}