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);
}
protected override void OnAppearing()
{
MyEntry.Focus();
base.OnAppearing();
}
