changement de candidat à l'investissement

ZicMoove/ZicMoove/Converters/Behaviors/RegexValidatorBehavior.cs

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+using System;
+using System.Text.RegularExpressions;
+using Xamarin.Forms;
+
+namespace BookAStar.Behaviors
+{
+    public class RegexValidatorBehavior : Behavior<Entry>
+    {
+        private string regexp = @"^([\d\w]+)$";
+        // Creating BindableProperties with Limited write access: http://iosapi.xamarin.com/index.aspx?link=M%3AXamarin.Forms.BindableObject.SetValue(Xamarin.Forms.BindablePropertyKey%2CSystem.Object) 
+
+        static readonly BindablePropertyKey IsValidPropertyKey = BindableProperty.CreateReadOnly("IsValid", typeof(bool), typeof(RegexValidatorBehavior), false);
+
+        public static readonly BindableProperty IsValidProperty = IsValidPropertyKey.BindableProperty;
+
+        public bool IsValid
+        {
+            get { return (bool)base.GetValue(IsValidProperty); }
+            private set { base.SetValue(IsValidPropertyKey, value); }
+        }
+
+        protected string Regexp
+        {
+            get
+            {
+                return regexp;
+            }
+
+            set
+            {
+                regexp = value;
+            }
+        }
+
+        protected override void OnAttachedTo(Entry bindable)
+        {
+            bindable.TextChanged += HandleTextChanged;
+        }
+
+
+        void HandleTextChanged(object sender, TextChangedEventArgs e)
+        {
+            IsValid = (Regex.IsMatch(e.NewTextValue, regexp, RegexOptions.IgnoreCase, TimeSpan.FromMilliseconds(250)));
+            ((Entry)sender).TextColor = IsValid ? Color.Default : Color.Red;
+        }
+
+        protected override void OnDetachingFrom(Entry bindable)
+        {
+            bindable.TextChanged -= HandleTextChanged;
+
+        }
+    }
+}