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using System.Threading.Tasks;
using Xamarin.Forms.CustomAttributes;
namespace Xamarin.Forms.Controls
{
[Issue (IssueTracker.Bugzilla, 35078,
"Checking IsInvokeRequired on WinRT when off the dispatcher thread causes a null reference exception",
PlatformAffected.WinRT)]
public class Bugzilla35078 : TestContentPage
{
protected override void Init ()
{
var button = new Button { Text = "Go" };
var instructions = new Label {
Text =
"Click the 'Go' button. If the application crashes or a label with the text 'Sucess' does not appear, the test has failed."
};
var success = new Label ();
button.Clicked += (sender, args) => {
Task.Run (() => {
bool invokeRequired = Device.IsInvokeRequired;
if (invokeRequired) {
Device.BeginInvokeOnMainThread (() => success.Text = "Success");
}
});
};
Content = new StackLayout { Children = { instructions, button, success } };
}
}
}
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