Esempio n. 1
0
        public static Task <string> InputBox(INavigation navigation)
        {
            // wait in this proc, until user did his input
            var tcs = new TaskCompletionSource <string>();

            var lblTitle = new Label {
                Text = "Title", HorizontalOptions = LayoutOptions.Center, FontAttributes = FontAttributes.Bold
            };
            var lblMessage = new Label {
                Text = "Enter new text:"
            };
            var txtInput = new MyEntry {
                Text = ""
            };

            var btnOk = new Button
            {
                Text            = "Ok",
                WidthRequest    = 100,
                BackgroundColor = Color.FromRgb(0.8, 0.8, 0.8),
            };

            btnOk.Clicked += async(s, e) =>
            {
                // close page
                var result = txtInput.Text;
                await navigation.PopModalAsync();

                // pass result
                tcs.SetResult(result);
            };

            var btnCancel = new Button
            {
                Text            = "Cancel",
                WidthRequest    = 100,
                BackgroundColor = Color.FromRgb(0.8, 0.8, 0.8)
            };

            btnCancel.Clicked += async(s, e) =>
            {
                // close page
                await navigation.PopModalAsync();

                // pass empty result
                tcs.SetResult(null);
            };

            var slButtons = new StackLayout
            {
                Orientation = StackOrientation.Horizontal,
                Children    = { btnOk, btnCancel },
            };

            var layout = new StackLayout
            {
                Padding           = new Thickness(0, 40, 0, 0),
                VerticalOptions   = LayoutOptions.StartAndExpand,
                HorizontalOptions = LayoutOptions.CenterAndExpand,
                Orientation       = StackOrientation.Vertical,
                Children          = { lblTitle, lblMessage, txtInput, slButtons },
            };

            // create and show page
            var page = new ContentPage();

            page.Content = layout;
            navigation.PushModalAsync(page);
            // open keyboard
            txtInput.Focus();

            // code is waiting her, until result is passed with tcs.SetResult() in btn-Clicked
            // then proc returns the result
            return(tcs.Task);
        }
Esempio n. 2
0
 protected override void OnAppearing()
 {
     MyEntry.Focus();
     base.OnAppearing();
 }