Why the Completed event occur on Focus()?

Question

I have some problem with Xamarin forms on Completed event which has been triggered when the control have focus (Entry)

Below is the View :

  <Entry
                x:Name="EntryOrderNumber"
                Placeholder="MFGO Number"
                Text="{Binding TextOrderEntry}" />

  <Entry
                x:Name="EntryMachineNumber"
                Placeholder="Machine Number"
                Text="{Binding TextMachineEntry}" />

And this is where I control the even which is placed at view.cs

public ProductionOrderPage()
        {
            InitializeComponent();
            BindingContext = App.Locator.ProductionOrderPageVM;
            EntryOrderNumber.Completed += EntryOrderNumber_Completed;
            EntryMachineNumber.Completed += EntryMachineNumber_Completed;
            EntryTotalPosition.Completed += EntryTotalPosition_Completed;


        }

        private void EntryMachineNumber_Completed(object sender, EventArgs e)
        {
            EntryMachineNumber.Unfocus();         
            EntryTotalPosition.Focus();
        }

        private void EntryOrderNumber_Completed(object sender, EventArgs e)
        {
            EntryOrderNumber.Unfocus();            
            EntryMachineNumber.Focus();
        }

My problem is : While the Entry (Text field) has focused , the Completed event has been triggered which resulting in the focus will go to another field continuously as per set in the Completed event.

the apps being debugged and deployed onto emulator
using MVVMlight

Thanks a lot

I can not reproduce this with a pure Xamarin.Form bindings , i.e. not using MVVMLight. In my test Completed event is only fired when user presses return. I wonder if somehow MVVMLight is inserting a return character when setting the binding, thus causing the Completed event to fire? — jgoldberger - MSFT, Dec 30 '16 at 01:29
when I do some other details test, looks like the Return key is actually executed twice. — anevil, Dec 30 '16 at 03:56

score 0 · Answer 1 · edited May 23 '17 at 10:30

0

using soft keyboard instead of hardware keyboard solve this problems. Weird.

Enabling soft keyboard : Visual Studio Android Emulator Display Keyboard

edited May 23 '17 at 10:30

Community

1
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answered Dec 30 '16 at 07:37

anevil

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Why the Completed event occur on Focus()?

1 Answers1