kmpdfkit_demo/Demo/Examples/Compdfkit_Tools/DigitalSignature/AddCertificationControl/AddCustomCertificationControl.xaml

<UserControl x:Class="Compdfkit_Tools.DigitalSignature.AddCertificationControl.AddCustomCertificationControl"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             xmlns:local="clr-namespace:Compdfkit_Tools.DigitalSignature.AddCertificationControl"
              xmlns:cpdfcommon="clr-namespace:Compdfkit_Tools.Common"
             mc:Ignorable="d" 
             Height="340" Width="403">
    <UserControl.Resources>
        <cpdfcommon:TextLengthToVisibilityConverter x:Key="TextLengthToVisibilityConverter"></cpdfcommon:TextLengthToVisibilityConverter>
        <cpdfcommon:BoolToCollapsedConverter x:Key="BoolToCollapsedConverter"></cpdfcommon:BoolToCollapsedConverter>
    </UserControl.Resources>
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="280"></RowDefinition>
            <RowDefinition></RowDefinition>
        </Grid.RowDefinitions>
        <Grid Background="#ffffff"  Margin="20,0,0,0"  Panel.ZIndex="1" Height="20" HorizontalAlignment="Left" VerticalAlignment="Top">
            <TextBlock Text="Signature Information" FontWeight="Bold" FontSize="16"></TextBlock>
        </Grid>
        <Border Margin="12" BorderBrush="#33000000" BorderThickness="1">
            <Grid Margin="10">
                <Grid.RowDefinitions>
                    <RowDefinition></RowDefinition>
                    <RowDefinition></RowDefinition>
                    <RowDefinition></RowDefinition>
                    <RowDefinition></RowDefinition>
                    <RowDefinition></RowDefinition>
                    <RowDefinition></RowDefinition>
                </Grid.RowDefinitions>
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="*"></ColumnDefinition>
                    <ColumnDefinition Width="2*"></ColumnDefinition>
                </Grid.ColumnDefinitions>
                <TextBlock Text="Grantor Name" VerticalAlignment="Center"></TextBlock>
                <Grid Grid.Column="1">
                    <TextBox Height="28" x:Name="GrantorNameTxt" VerticalContentAlignment="Center" VerticalAlignment="Center"/>
                    <TextBlock Text="Please Enter Grantor Name" VerticalAlignment="Center"  Margin="10" Visibility="{Binding ElementName=GrantorNameTxt, Path=Text, Converter={StaticResource TextLengthToVisibilityConverter}}" IsHitTestVisible="False"  Foreground="#BBB"></TextBlock>
                </Grid>
                <TextBlock Grid.Row="1" Text="Parse2Txt" VerticalAlignment="Center"></TextBlock>
                <Grid Grid.Column="1" Grid.Row="1">
                    <TextBox Height="28" x:Name="Parse2Txt" VerticalContentAlignment="Center" VerticalAlignment="Center"/>
                    <TextBlock Text="Please Enter Parse2Txt" VerticalAlignment="Center"  Margin="10" Visibility="{Binding ElementName=Parse2Txt, Path=Text, Converter={StaticResource TextLengthToVisibilityConverter}}" IsHitTestVisible="False"  Foreground="#BBB"></TextBlock>
                </Grid>
                <TextBlock Grid.Row="2" Text="Departmental" VerticalAlignment="Center"></TextBlock>
                <Grid Grid.Column="1" Grid.Row="2">
                    <TextBox Height="28" x:Name="DepartmentalTxt" VerticalContentAlignment="Center" VerticalAlignment="Center"/>
                    <TextBlock Text="Please Enter Departmental" VerticalAlignment="Center"  Margin="10" Visibility="{Binding ElementName=DepartmentalTxt, Path=Text, Converter={StaticResource TextLengthToVisibilityConverter}}" IsHitTestVisible="False"  Foreground="#BBB"></TextBlock>
                </Grid>
                <TextBlock Grid.Row="3" Text="Unit Name" VerticalAlignment="Center"></TextBlock>
                <Grid Grid.Column="1" Grid.Row="3">
                    <TextBox Height="28" x:Name="UnitNameTxt" VerticalContentAlignment="Center" VerticalAlignment="Center"/>
                    <TextBlock Text="Please Enter Unit Name" VerticalAlignment="Center"  Margin="10" Visibility="{Binding ElementName=UnitNameTxt, Path=Text, Converter={StaticResource TextLengthToVisibilityConverter}}" IsHitTestVisible="False"  Foreground="#BBB"></TextBlock>
                </Grid>
                <TextBlock Grid.Row="4" Text="Email" VerticalAlignment="Center"></TextBlock>
                <Grid Grid.Column="1" Grid.Row="4">
                    <TextBox Height="28" x:Name="EmailTxt" VerticalContentAlignment="Center" VerticalAlignment="Center"/>
                    <TextBlock Text="Please Enter Email" VerticalAlignment="Center"  Margin="10" Visibility="{Binding ElementName=Email, Path=Text, Converter={StaticResource TextLengthToVisibilityConverter}}" IsHitTestVisible="False"  Foreground="#BBB"></TextBlock>
                </Grid>
                <TextBlock Grid.Row="5" Text="Country/Area" VerticalAlignment="Center"></TextBlock>
                <Grid Grid.Column="1" Grid.Row="5">
                    <TextBox Height="28" x:Name="AreaTxt" VerticalContentAlignment="Center" VerticalAlignment="Center"/>
                    <ComboBox Margin="0,5,0,5"></ComboBox>
                </Grid>
            </Grid>
        </Border>
        <Grid Grid.Row="1">
            <StackPanel Margin="0,0,24,12" VerticalAlignment="Bottom" Orientation="Horizontal" HorizontalAlignment="Right">
                <Button Height="32" Width="112" Margin="0,0,8,0" Content="Cancel"></Button>
                <Button Height="32" Width="112" Content="Save"></Button>
            </StackPanel>   
        </Grid>
    </Grid>
</UserControl>