MainWindow.xaml

<Window x:Class="WpfApplication24.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:dxg="http://schemas.devexpress.com/winfx/2008/xaml/grid"
        Title="MainWindow" Height="350" Width="650">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition/>
            <RowDefinition Height="30"/>
        </Grid.RowDefinitions>
        <dxg:GridControl x:Name="grid" AutoGenerateColumns="AddNew">
            <dxg:GridControl.View>
                <dxg:TableView x:Name="view" AutoWidth="True"/>
            </dxg:GridControl.View>
        </dxg:GridControl>
        <StackPanel Grid.Row="1" Orientation="Horizontal">
            <TextBox x:Name="textBox" Width="200" KeyDown="textBox_KeyDown" Margin="3,3,3,3"/>
            <Button Content="Apply" Click="Button_Click" Margin="0,3,0,3"/>
        </StackPanel>
    </Grid>
</Window>