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

<UserControl x:Class="Compdfkit_Tools.PDFControl.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.PDFControl"
              xmlns:cpdfcommon="clr-namespace:Compdfkit_Tools.Common"
             mc:Ignorable="d" 
             Height="350" 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>
            <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>
                <StackPanel Orientation="Horizontal">
                    <TextBlock Text="Grantor Name" VerticalAlignment="Center"></TextBlock>
                    <TextBlock Text="*" Foreground="Red" VerticalAlignment="Center"></TextBlock>
                </StackPanel>
                <Grid Grid.Column="1">
                    <TextBox Height="28" x:Name="GrantorNameTxt" VerticalContentAlignment="Center" VerticalAlignment="Center" Text="{Binding GrantorName}"/>
                    <TextBlock Text="Please Enter Grantor Name" VerticalAlignment="Center"  Margin="10,0,0,0" Visibility="{Binding ElementName=GrantorNameTxt, Path=Text, Converter={StaticResource TextLengthToVisibilityConverter}}" IsHitTestVisible="False"  Foreground="#BBB"></TextBlock>
                </Grid>
                <TextBlock Grid.Row="1" Text="Organizational Unit" VerticalAlignment="Center"></TextBlock>
                <Grid Grid.Column="1" Grid.Row="1">
                    <TextBox Height="28" x:Name="OrganizationalUnitTxt" VerticalContentAlignment="Center" Text="{Binding OrganizationalUnit}" VerticalAlignment="Center"/>
                    <TextBlock Text="Please Enter Organizational Unit" VerticalAlignment="Center"  Margin="10,0,0,0" Visibility="{Binding ElementName=OrganizationalUnitTxt, Path=Text, Converter={StaticResource TextLengthToVisibilityConverter}}" IsHitTestVisible="False"  Foreground="#BBB"></TextBlock>
                </Grid>
                <TextBlock Grid.Row="2" Text="Organization" VerticalAlignment="Center"></TextBlock>
                <Grid Grid.Column="1" Grid.Row="2">
                    <TextBox Height="28" x:Name="OrganizationTxt" VerticalContentAlignment="Center" Text="{Binding Organization}" VerticalAlignment="Center"/>
                    <TextBlock Text="Please Enter Organization" VerticalAlignment="Center"  Margin="10,0,0,0" Visibility="{Binding ElementName=OrganizationTxt, Path=Text, Converter={StaticResource TextLengthToVisibilityConverter}}" IsHitTestVisible="False"  Foreground="#BBB"></TextBlock>
                </Grid>
                <StackPanel Grid.Row="3" Orientation="Horizontal">
                    <TextBlock Text="Email" VerticalAlignment="Center"></TextBlock>
                    <TextBlock Text="*" Foreground="Red" VerticalAlignment="Center"></TextBlock>
                </StackPanel>
                <Grid Grid.Column="1" Grid.Row="3">
                    <TextBox Height="28" x:Name="EmailTxt" VerticalContentAlignment="Center" Text="{Binding Email}" VerticalAlignment="Center"/>
                    <TextBlock Text="Please Enter Email" VerticalAlignment="Center"  Margin="10,0,0,0" Visibility="{Binding ElementName=EmailTxt, Path=Text, Converter={StaticResource TextLengthToVisibilityConverter}}" IsHitTestVisible="False"  Foreground="#BBB"></TextBlock>
                </Grid>
                <TextBlock Grid.Row="4" Text="Country/Area" VerticalAlignment="Center"></TextBlock>
                <Grid Grid.Column="1" Grid.Row="4">
                    <ComboBox Margin="0,5,0,5" Name="AreaCmb" SelectedIndex="0" SelectionChanged="AreaCmb_SelectionChanged"></ComboBox>
                </Grid>
                <TextBlock Grid.Row="5" Text="Purpose" VerticalAlignment="Center"></TextBlock>
                <Grid Grid.Column="1" Grid.Row="5">
                    <ComboBox Margin="0,5,0,5" Name="PurposeCmb" SelectedIndex="0" SelectionChanged="PurposeCmb_SelectionChanged"></ComboBox>
                </Grid>
            </Grid>
        </Border>
        <TextBlock Grid.Row="1" Name="ErrorTipsText" Foreground="Red" Margin="15,0,24,14"></TextBlock>
        <Grid Grid.Row="2">
            <StackPanel Margin="0,-10,24,12" VerticalAlignment="Bottom" Orientation="Horizontal" HorizontalAlignment="Right">
                <Button x:Name="CancelBtn" Height="32" Width="112" Margin="0,0,8,0" Content="Cancel" Click="CancelBtn_Click"></Button>
                <Button x:Name="SaveBtn" Height="32" Width="112" Content="Save" Click="SaveBtn_Click"></Button>
            </StackPanel>   
        </Grid>
    </Grid>
</UserControl>