Add cancellation logic to preview
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@ -1,6 +1,6 @@
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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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@ -37,19 +37,33 @@ namespace Samples
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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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results.Content = contentView;
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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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