borepin/Borepin/Borepin/Page/CreateCardPage.xaml

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             x:Class="Borepin.Page.CreateCardPage"
             xmlns:converters="clr-namespace:Borepin.Converter"
             xmlns:resource_text="clr-namespace:Borepin.Resources.Text" 
             xmlns:views="clr-namespace:Borepin.View"
             Title="Create Card">
    <NavigationPage.TitleView>
        <Button Text="Refresh" HorizontalOptions="End" BackgroundColor="{StaticResource SecondColor}" TextColor="{StaticResource FirstColor}" Command="{Binding RefreshCommand}"/>
    </NavigationPage.TitleView>
    <ContentPage.Resources>
        <ResourceDictionary>
            <converters:AllTrueBoolConverter x:Key="AllTrueBoolConverter"/>
            <converters:InvertBoolConverter x:Key="InvertBoolConverter"/>
        </ResourceDictionary>
    </ContentPage.Resources>
    <ContentPage.Content>
        <StackLayout Padding="20">
            <views:ConnectionStateView/>
            <StackLayout>
                <StackLayout.IsVisible>
                    <MultiBinding Converter="{StaticResource AllTrueBoolConverter}">
                        <Binding Path="IsBusy" Converter="{StaticResource InvertBoolConverter}"/>
                        <Binding Path="IsConnected" />
                    </MultiBinding>
                </StackLayout.IsVisible>
                <Label Text="NFC Reader" Style="{StaticResource Style_Label_Property_Title}"></Label>
                <Picker ItemsSource="{Binding ReaderIDs}" SelectedItem="{Binding ReaderID}"></Picker>

                
                <Label Text="PICC Key" Style="{StaticResource Style_Label_Property_Title}"></Label>
                <Grid>
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="4*" />
                        <ColumnDefinition Width="1*" />
                        <ColumnDefinition Width="1*" />
                    </Grid.ColumnDefinitions>
                    <Entry Grid.Column="0" Text="{Binding PICCKey}" IsSpellCheckEnabled="false"/>
                    <Button Grid.Column="2" Text="Scan QR-Code" Command="{Binding ScanPICCKeyCommand}" Style="{StaticResource Style_Button_Primary}" IsVisible="False"/>
                </Grid>
                
                <Label Text="Application Key" Style="{StaticResource Style_Label_Property_Title}"></Label>
                <Grid>
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="4*" />
                        <ColumnDefinition Width="1*" />
                        <ColumnDefinition Width="1*" />
                    </Grid.ColumnDefinitions>
                    <Entry Grid.Column="0" Text="{Binding APPKey}" IsSpellCheckEnabled="false"/>
                    <Button Grid.Column="1" Text="Random" Command="{Binding RandomAPPKeyCommand}" Style="{StaticResource Style_Button_Primary}"/>
                    <Button Grid.Column="2" Text="Scan QR-Code" Command="{Binding ScanAPPKeyCommand}" Style="{StaticResource Style_Button_Primary}" IsVisible="False"/>
                </Grid>

                <StackLayout Orientation="Horizontal">
                    <CheckBox IsChecked="{Binding FormatCard}"/>
                    <Label Text="Format Card" VerticalOptions="Center"/>
                </StackLayout>
                
                <Button Text="Create Card" Command="{Binding CreateCardCommand}" Style="{StaticResource Style_Button_Primary}"/>
            </StackLayout>
        </StackLayout>
    </ContentPage.Content>
</ContentPage>