QueryView.xaml

<UserControl xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:fsxaml="http://github.com/fsprojects/FsXaml"
             xmlns:validation="clr-namespace:UI.Validation;assembly=UI">
    <Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="100"/>
            <ColumnDefinition/>
        </Grid.ColumnDefinitions>
        <Grid.RowDefinitions>
            <RowDefinition Height="*"/>
            <RowDefinition Height="*"/>
            <RowDefinition Height="*"/>
            <RowDefinition Height="*"/>
            <RowDefinition Height="*"/>
        </Grid.RowDefinitions>

        <ComboBox Grid.Column="0" Grid.Row="0" VerticalAlignment="Center"
                  ItemsSource="{Binding Model.LogStores}"
                  SelectedItem="{Binding Model.SelectedLogStore, UpdateSourceTrigger=PropertyChanged}"
                  DisplayMemberPath="name"/>
        <TextBox Grid.Column="1" Grid.Row="0" VerticalAlignment="Center" Padding="2"
                 Text="{Binding Model.Host, UpdateSourceTrigger=PropertyChanged}"/>

        <Label Grid.Column="0" Grid.Row="1" VerticalAlignment="Center" Padding="2"
               Content="{Binding Model.SelectedLogStore.channel}"/>
        <TextBox Grid.Column="1" Grid.Row="1" VerticalAlignment="Center" Padding="2"
                 Text="{Binding Model.Channel, UpdateSourceTrigger=PropertyChanged}"/>

        <ComboBox Name="TargetType" Grid.Column="0" Grid.Row="2" VerticalAlignment="Center"
                  SelectedValue="{Binding Model.TargetType}"
                  ItemsSource="{Binding Model.TargetTypes}"/>

        <StackPanel Grid.Column="1" Grid.Row="2" Orientation="Horizontal">
            <ContentControl>
                <ContentControl.Resources>
                    <ControlTemplate x:Key="DateControl" TargetType="{x:Type ContentControl}">
                        <TextBox MinWidth="125" TextAlignment="Left" VerticalAlignment="Center" Padding="2">
                            <TextBox.Text>
                                <Binding Path="Model.TargetDate" UpdateSourceTrigger="PropertyChanged" StringFormat="yyyy-MM-dd HH:mm:ss">
                                    <Binding.ValidationRules>
                                        <validation:DateTimeValidationRule/>
                                    </Binding.ValidationRules>
                                </Binding>
                            </TextBox.Text>
                        </TextBox>
                    </ControlTemplate>
                    <ControlTemplate x:Key="TextControl" TargetType="{x:Type ContentControl}">
                        <TextBox MinWidth="125" TextAlignment="Left" VerticalAlignment="Center" Padding="2"
                                 Text="{Binding Model.TargetText}"/>
                    </ControlTemplate>
                    <ControlTemplate x:Key="NumberControl" TargetType="{x:Type ContentControl}">
                        <TextBox MinWidth="125" TextAlignment="Left" VerticalAlignment="Center" Padding="2"
                                 Text="{Binding Model.TargetNumber}"/>
                    </ControlTemplate>
                </ContentControl.Resources>
                <ContentControl.Style>
                    <Style TargetType="{x:Type ContentControl}">
                        <Style.Triggers>
                            <DataTrigger Binding="{Binding ElementName=TargetType, Path=SelectedIndex}" Value="0">
                                <Setter Property="Template" Value="{DynamicResource DateControl}"/>
                            </DataTrigger>
                            <DataTrigger Binding="{Binding ElementName=TargetType, Path=SelectedIndex}" Value="1">
                                <Setter Property="Template" Value="{DynamicResource TextControl}"/>
                            </DataTrigger>
                            <DataTrigger Binding="{Binding ElementName=TargetType, Path=SelectedIndex}" Value="2">
                                <Setter Property="Template" Value="{DynamicResource NumberControl}"/>
                            </DataTrigger>
                        </Style.Triggers>
                    </Style>
                </ContentControl.Style>
            </ContentControl>
            <Label> increasing at JsonPath: </Label>
            <TextBox MinWidth="100" VerticalAlignment="Center" Padding="2"
                     Text="{Binding Model.TargetPath, UpdateSourceTrigger=PropertyChanged}"/>
        </StackPanel>

        <Label Grid.Column="0" Grid.Row="3" VerticalAlignment="Center" Padding="2">Scan Range &lt;=</Label>
        <StackPanel Grid.Column="1" Grid.Row="3" Orientation="Horizontal">
            <TextBox MinWidth="25" VerticalAlignment="Center" Padding="2"
                         Text="{Binding Model.StartScanAt, UpdateSourceTrigger=PropertyChanged}"/>
        </StackPanel>

        <Button Grid.Column="0" Grid.Row="4" VerticalAlignment="Bottom" Margin="0 0 5 0"
                Command="{Binding Connect}">Query</Button>
        <TextBlock Grid.Column="1" Grid.Row="4" VerticalAlignment="Bottom" Margin="0 0 0 5" Text="{Binding Model.Status}"/>
    </Grid>
</UserControl>