Presentation Model (MVVM) Good Practices

<UserControl
    x:Class="WPFUI.View.ProductEditView"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Style="{StaticResource ViewStyle}"
    >
    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="Auto"/>
            <ColumnDefinition Width="Auto"/>
            <ColumnDefinition/>
        </Grid.ColumnDefinitions>
        <Grid.RowDefinitions>
            <RowDefinition Height="30"/>
            <RowDefinition Height="30"/>
            <RowDefinition Height="30"/>
            <RowDefinition Height="30"/>
            <RowDefinition Height="30"/>
            <RowDefinition/>
        </Grid.RowDefinitions>
        <DockPanel
            Margin="5"
            Grid.Row="0"
            Grid.Column="0"
            >
            <TextBlock
                Width="50"
                DockPanel.Dock="Left"
                Text="Name : "
                />
            <TextBox
                Width="150"
                DockPanel.Dock="Right"
                Text="{Binding ProductName}"
                />
        </DockPanel>
        <DockPanel
            Margin="5"
            Grid.Row="1"
            Grid.Column="0"
            >
            <TextBlock                
                Width="50"
                DockPanel.Dock="Left"
                Text="Price : "
                />
            <TextBox
                Width="150"
                DockPanel.Dock="Right"
                Text="{Binding ProductPrice}"
                />
        </DockPanel>
        <DockPanel
            Margin="5"
            Grid.Row="0"
            Grid.Column="1"
            Grid.RowSpan="5">
            <TextBlock
                Width="50"
                Text="Photo : "
                DockPanel.Dock="Left"
                />
            <StackPanel
                DockPanel.Dock="Right">
                <Border
                    BorderThickness="1"
                    BorderBrush="Black">
                    <Image                        
                        Height="100"
                        Width="100"
                        Source="{Binding ProductPhotography}"
                        />
                </Border>
                <Button
                    Content="Change"
                    Command="{Binding Call}"
                    CommandParameter="ChoosePhoto"
                    />
            </StackPanel>
        </DockPanel>
        <Button 
            VerticalAlignment="Bottom"
            HorizontalAlignment="Right"
            Grid.Column="3"
            Grid.Row="6"
            Content="Save"
            Command="{Binding Call}"
            CommandParameter="SaveOrUpdate"
            />
    </Grid>
</UserControl>