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XamarinWhatsApp: PaginaMensaje.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="XamarinWhatsApp.Paginas.PaginaMensaje" Title="Xamarin y WhatsApp">
<ContentPage.Resources>
<ResourceDictionary>
<OnPlatform
x:Key="FontAwesome5"
x:TypeArguments="x:String"
Android="fa-regular-400.ttf#Font Awesome 5 Free Regular"
iOS="Font Awesome 5 Free"
WinPhone="Assets/fa-regular-400.ttf#Font Awesome 5 Free" />
<Style TargetType="Label" x:Key="labelStyle">
<Setter Property="FontSize" Value="Large"/>
<Setter Property="FontAttributes" Value="Bold"/>
<Setter Property="VerticalTextAlignment" Value="Center"/>
<Setter Property="Margin" Value="5"/>
<Setter Property="FontFamily" Value="{DynamicResource FontAwesome5}"/>
</Style>
<Style TargetType="Entry" x:Key="entryStyle">
<Setter Property="TextColor" Value="Black"/>
<Setter Property="FontSize" Value="Medium"/>
<Setter Property="VerticalOptions" Value="End"/>
<Setter Property="Margin" Value="5"/>
</Style>
<Style TargetType="Button" x:Key="buttonStyle">
<Setter Property="FontSize" Value="Large"/>
<Setter Property="BackgroundColor" Value="Transparent"/>
<Setter Property="VerticalOptions" Value="Center"/>
<Setter Property="Margin" Value="5"/>
<Setter Property="FontFamily" Value="{DynamicResource FontAwesome5}"/>
</Style>
</ResourceDictionary>
</ContentPage.Resources>
<ContentPage.Content>
<Grid BackgroundColor="White">
<Grid.RowDefinitions>
<RowDefinition Height="20"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="20"/>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="Auto"/>
</Grid.ColumnDefinitions>
<Label Style="{StaticResource labelStyle}" Grid.Row="1" Grid.Column="1" Text="&#xf580;" TextColor="Orange"/>
<Entry Style="{StaticResource entryStyle}" Grid.Row="1" Grid.Column="2" x:Name="txtFrom" Placeholder="De: " Keyboard="Telephone"/>
<Label Style="{StaticResource labelStyle}" Grid.Row="2" Grid.Column="1" Text="&#xf007;" TextColor="Blue"/>
<Entry Style="{StaticResource entryStyle}" Grid.Row="2" Grid.Column="2" x:Name="txtTo" Placeholder="Para: " Keyboard="Telephone"/>
<Label Style="{StaticResource labelStyle}" Grid.Row="3" Grid.Column="1" Text="&#xf075;" TextColor="Gray"/>
<Entry Style="{StaticResource entryStyle}" Grid.Row="3" Grid.Column="2" x:Name="txtBody" Placeholder="Mensaje" Keyboard="Chat"/>
<Button Style="{StaticResource buttonStyle}" Grid.Row="3" Grid.Column="3" x:Name="btnEnviar" Text="&#xf1d8;" TextColor="Green" Clicked="btnEnviar_Clicked"/>
<ScrollView Grid.Row="4" Grid.Column="2" Grid.ColumnSpan="2">
<ListView x:Name="lsvMensajes"
VerticalOptions="FillAndExpand"
HasUnevenRows="True"
Margin="3">
<ListView.ItemTemplate>
<DataTemplate>
<ViewCell>
<StackLayout Padding="5">
<Label Text="{Binding To}" TextColor="Blue" FontSize="Small" Margin="2"/>
<Label Text="{Binding Body}" TextColor="Black" FontSize="Small" Margin="2"/>
<Label Text="{Binding Sid}" TextColor="Gray" FontSize="Small" Margin="2"/>
</StackLayout>
</ViewCell>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
</ScrollView>
</Grid>
</ContentPage.Content>
</ContentPage>
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