如何在Xamarin表单(MVVM)中删除键入过程中的空格

using System;
using Xamarin.Forms;

namespace YourNamespace
{
    public class RemoveSpacesConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            if (value is string text)
            {
                return text.Replace(" ", string.Empty);
            }
            return value;
        }

        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            return value;
        }
    }
}

<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:local="clr-namespace:YourNamespace"
             x:Class="YourNamespace.YourPage">
    <ContentPage.Resources>
        <ResourceDictionary>
            <local:RemoveSpacesConverter x:Key="RemoveSpacesConverter" />
        </ResourceDictionary>
    </ContentPage.Resources>
    
    <StackLayout>
        <Entry Text="{Binding YourTextProperty, Converter={StaticResource RemoveSpacesConverter}}" />
    </StackLayout>
</ContentPage>

using System.ComponentModel;
using Xamarin.Forms;

namespace YourNamespace
{
    public class YourViewModel : INotifyPropertyChanged
    {
        private string yourTextProperty;
        public string YourTextProperty
        {
            get { return yourTextProperty; }
            set
            {
                if (yourTextProperty != value)
                {
                    yourTextProperty = value.Replace(" ", string.Empty);
                    OnPropertyChanged(nameof(YourTextProperty));
                }
            }
        }

        public event PropertyChangedEventHandler PropertyChanged;

        protected virtual void OnPropertyChanged(string propertyName)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }
    }
}