MainWindow.xaml

<Window x:Class="FileStorageExportTool.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:FileStorageExportTool"
        xmlns:extToolkit="clr-namespace:Xceed.Wpf.Toolkit;assembly=Xceed.Wpf.Toolkit"
        mc:Ignorable="d"
        Title="Export tool" Height="600" Width="800">
   
    <Window.DataContext>
        <local:MainViewModel x:Name="ViewModel" />
    </Window.DataContext>

    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="*"/>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="Auto"/>
            <RowDefinition Height="Auto" />
            <RowDefinition Height="Auto" />
            <RowDefinition Height="Auto" />
        </Grid.RowDefinitions>

        <GroupBox Header="Select channels to export" Margin="5">
            <DockPanel>
                <CheckBox DockPanel.Dock="Top" Margin="5" IsEnabled="{Binding IsChannelsListEnabled.Value}"
                          Command="{Binding SelectAllCommand}" CommandParameter="{Binding IsChecked, RelativeSource={RelativeSource Self}}">Select / Unselect all</CheckBox>

                <ListBox Margin="5" ItemsSource="{Binding Channels}" IsEnabled="{Binding IsChannelsListEnabled.Value}">
                    <ListBox.ItemTemplate>
                        <DataTemplate>
                            <StackPanel>
                                <CheckBox Content="{Binding Name}" IsChecked="{Binding IsChecked, Mode=TwoWay}" IsEnabled="{Binding IsEnabled}" />
                            </StackPanel>
                        </DataTemplate>
                    </ListBox.ItemTemplate>
                </ListBox>
            </DockPanel>
        </GroupBox>

        <GroupBox Grid.Row="1" Header="Select license path" Margin="5">
            <Grid>
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="2*" />
                    <ColumnDefinition Width="4*" />
                    <ColumnDefinition Width="*" />
                </Grid.ColumnDefinitions>

                <TextBlock Margin="5" VerticalAlignment="Center" Text="License path:"/>
                <TextBlock Grid.Column="1" Margin="5" VerticalAlignment="Center" Text="{Binding LicensePath}"/>
                <Button Grid.Column="2" Width="60" Height="20" Margin="5" VerticalAlignment="Center" HorizontalAlignment="Right" 
                        Command="{Binding BrowseLicenseCommand}" IsEnabled="{Binding IsBrowseLicenseEnabled.Value}">Browse</Button>
            </Grid>
        </GroupBox>

        <GroupBox Grid.Row="2" Header="Select material and destination path" Margin="5">
            <Grid>                
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="2*" />
                    <ColumnDefinition Width="4*" />
                    <ColumnDefinition Width="*" />
                </Grid.ColumnDefinitions>

                <Grid.RowDefinitions>
                    <RowDefinition Height="*" />
                    <RowDefinition Height="*" />
                </Grid.RowDefinitions>

                <TextBlock Margin="5" VerticalAlignment="Center" Text="Source path:"/>
                <TextBlock Grid.Column="1" Margin="5" VerticalAlignment="Center" Text="{Binding SelectedPath}"/>
                <Button Grid.Column="2" Width="60" Height="20" Margin="5" VerticalAlignment="Center" HorizontalAlignment="Right" 
                        Command="{Binding BrowseSourceCommand}" IsEnabled="{Binding IsBrowseSourcePathEnabled.Value}">Browse</Button>

                <TextBlock Grid.Row="1" Margin="5" VerticalAlignment="Center" Text="Destination path:"/>
                <TextBlock Grid.Row="1" Grid.Column="1" Margin="5" VerticalAlignment="Center" Text="{Binding DestinationPath}"/>
                <Button Grid.Row="1" Grid.Column="2" Width="60" Height="20" Margin="5" VerticalAlignment="Center" HorizontalAlignment="Right" 
                        Command="{Binding BrowseDestinationCommand}" IsEnabled="{Binding IsBrowseDestinationPathEnabled.Value}">Browse</Button>
            </Grid>
        </GroupBox>
        
        <GroupBox Grid.Row="3" Header="Select begin and end date and time" Margin="5">
            <Grid>
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="*" />
                    <ColumnDefinition Width="2*" />
                    <ColumnDefinition Width="*" />
                    <ColumnDefinition Width="2*" />
                    <ColumnDefinition Width="*" />
                </Grid.ColumnDefinitions>
                
                <TextBlock Margin="5" VerticalAlignment="Center">Export begin</TextBlock>

                <extToolkit:DateTimePicker x:Name="_startDateTimePicker" Grid.Column="1" Margin="5,0,5,0"
                                           Format="Custom" FormatString="dd/MM/yyyy HH:mm:ss" TimePickerVisibility="Collapsed" ShowButtonSpinner="False"
                                           VerticalAlignment="Center" TextAlignment="Right" UpdateValueOnEnterKey="True" Value="{Binding Begin.Value}" IsEnabled="{Binding IsTimePeriodEnabled.Value}"/>

                <TextBlock DockPanel.Dock="Right" Margin="5,0,5,0" Grid.Column="2" VerticalAlignment="Center">Export end</TextBlock>
                
                <extToolkit:DateTimePicker x:Name="_endDateTimePicker" Grid.Column="3" Margin="5"
                                           Format="Custom" FormatString="dd/MM/yyyy HH:mm:ss" TimePickerVisibility="Collapsed" ShowButtonSpinner="False"
                                           VerticalAlignment="Center" TextAlignment="Right" UpdateValueOnEnterKey="True" Value="{Binding End.Value}" IsEnabled="{Binding IsTimePeriodEnabled.Value}" />

                <Button Grid.Column="4" Width="60" Height="20" Margin="5" VerticalAlignment="Center" HorizontalAlignment="Right" 
                        Command="{Binding ExportCommand}" Content="{Binding ExportButton.Value}"
                        IsEnabled="{Binding IsExportButtonEnabled.Value}"/>

            </Grid>
        </GroupBox>

        <ProgressBar Grid.Row="4" Minimum="0" Margin="5,0,5,0" Maximum="100" Height="20" Value="{Binding Progress.Value}" HorizontalAlignment="Stretch"  />

        <StatusBar Grid.Row="5">
            <StatusBarItem>
                <TextBlock Text="{Binding Error.Value}" Foreground="Red" Margin="5,0,5,0" />
            </StatusBarItem>
        </StatusBar>

    </Grid>
</Window>