73 lines
2.6 KiB
C#
73 lines
2.6 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Threading;
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using Xamarin.Forms;
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namespace Samples
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{
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public partial class XamlPreviewPage : ContentPage
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{
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public XamlPreviewPage ()
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{
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InitializeComponent ();
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editor.Text = @"<ContentView
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xmlns=""http://xamarin.com/schemas/2014/forms""
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xmlns:x=""http://schemas.microsoft.com/winfx/2009/xaml"">
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<Grid>
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<Grid.RowDefinitions>
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<RowDefinition Height=""*"" />
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<RowDefinition Height=""*"" />
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</Grid.RowDefinitions>
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<Grid.ColumnDefinitions>
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<ColumnDefinition Width=""*"" />
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<ColumnDefinition Width=""*"" />
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</Grid.ColumnDefinitions>
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<StackLayout Grid.Row=""0"" Grid.Column=""0"">
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<Label Text=""Top Left"" />
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<Entry Placeholder=""I'm ready for some text"" />
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<Button Text=""I'm a button, but I don't do anything"" />
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</StackLayout>
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<Label Text=""Top Right"" Grid.Row=""0"" Grid.Column=""1"" TextColor=""White"" BackgroundColor=""#c5000b"" />
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<Label Text=""Bottom Left"" Grid.Row=""1"" Grid.Column=""0"" TextColor=""Black"" BackgroundColor=""#ffd320"" />
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<Label Text=""Bottom Right"" Grid.Row=""1"" Grid.Column=""1"" TextColor=""White"" BackgroundColor=""#008000"" />
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</Grid>
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</ContentView>";
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editor.TextChanged += (sender, e) => DisplayXaml ();
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DisplayXaml ();
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}
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CancellationTokenSource lastCts = null;
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public void DisplayXaml ()
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{
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try {
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var cts = new CancellationTokenSource ();
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var token = cts.Token;
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lastCts?.Cancel ();
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lastCts = cts;
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var asm = typeof (Xamarin.Forms.Xaml.Internals.XamlTypeResolver).Assembly;
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var xamlLoaderType = asm.GetType ("Xamarin.Forms.Xaml.XamlLoader");
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var loadArgTypes = new[] { typeof (object), typeof (string) };
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var loadMethod = xamlLoaderType.GetMethod ("Load", System.Reflection.BindingFlags.Static | System.Reflection.BindingFlags.Public, null, System.Reflection.CallingConventions.Any, loadArgTypes, null);
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var contentView = new ContentView ();
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loadMethod.Invoke (null, new object[] { contentView, editor.Text });
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if (!token.IsCancellationRequested) {
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results.Content = contentView;
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}
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}
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catch (OperationCanceledException) {
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}
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catch (Exception ex) {
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results.Content = new Label {
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TextColor = Color.DarkRed,
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FontSize = 12,
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Text = ex.ToString (),
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};
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}
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}
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}
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}
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