Added NullOrEmptyToVisibility converters

Author: aronium

Aronium.Wpf.Toolkit/Aronium.Wpf.Toolkit.csproj

@@ -85,8 +85,10 @@
     <Compile Include="Controls\WatermarkTextBox.cs" />
     <Compile Include="Converters\InvertBooleanConverter.cs" />
     <Compile Include="Converters\InvertBooleanToVisibilityConverter.cs" />
+    <Compile Include="Converters\NotNullOrEmptyToVisibilityConverter.cs" />
     <Compile Include="Converters\NotNullToBooleanConverter.cs" />
     <Compile Include="Converters\NotNullToVisibilityConverter.cs" />
+    <Compile Include="Converters\NullOrEmptyToVisibilityConverter.cs" />
     <Compile Include="Converters\NullToVisibilityConverter.cs" />
     <Compile Include="Converters\KiloConverter.cs" />
     <Compile Include="Converters\UppercaseConverter.cs" />

Aronium.Wpf.Toolkit/Controls/NumericUpDown.cs

@@ -105,7 +105,7 @@ private static void OnDecimalPlacesChanged(DependencyObject d, DependencyPropert
             @this.UpdateText();
         }
 
-        protected override void OnMouseWheel(System.Windows.Input.MouseWheelEventArgs e)
+        protected override void OnMouseWheel(MouseWheelEventArgs e)
         {
             if (IsFocused)
             {
@@ -174,7 +174,7 @@ private void UpdateText()
                     if (!AcceptEmptyValue)
                         this.UpdateText(this.Minimum);
                 }
-                else if (decimal.TryParse(this.Text, NumberStyles.AllowDecimalPoint, CultureInfo.InvariantCulture, out decimalValueParsed))
+                else if (decimal.TryParse(this.Text, NumberStyles.AllowDecimalPoint | NumberStyles.Number, CultureInfo.InvariantCulture, out decimalValueParsed))
                 {
                     this.UpdateText(decimalValueParsed);
                 }
@@ -203,7 +203,7 @@ private void Up()
                 this.Focus();
             }
 
-            if (decimal.TryParse(this.Text, NumberStyles.AllowDecimalPoint, CultureInfo.InvariantCulture, out decimalValueParsed))
+            if (decimal.TryParse(this.Text, NumberStyles.AllowDecimalPoint | NumberStyles.Number, CultureInfo.InvariantCulture, out decimalValueParsed))
             {
                 if (decimalValueParsed + Increment <= Maximum)
                 {
@@ -221,7 +221,7 @@ private void Down()
                 this.Focus();
             }
 
-            if (decimal.TryParse(this.Text, NumberStyles.AllowDecimalPoint, CultureInfo.InvariantCulture, out decimalValueParsed))
+            if (decimal.TryParse(this.Text, NumberStyles.AllowDecimalPoint | NumberStyles.Number, CultureInfo.InvariantCulture, out decimalValueParsed))
             {
                 if (decimalValueParsed - Increment >= Minimum)
                 {

Aronium.Wpf.Toolkit/Converters/NotNullOrEmptyToVisibilityConverter.cs

@@ -0,0 +1,19 @@
+using System;
+using System.Windows;
+using System.Windows.Data;
+
+namespace Aronium.Wpf.Toolkit.Converters
+{
+    public class NotNullOrEmptyToVisibilityConverter : IValueConverter
+    {
+        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
+        {
+            return string.IsNullOrWhiteSpace((string)value) ? Visibility.Collapsed : Visibility.Visible;
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
+        {
+            return Binding.DoNothing;
+        }
+    }
+}

Aronium.Wpf.Toolkit/Converters/NullOrEmptyToVisibilityConverter.cs

@@ -0,0 +1,19 @@
+using System;
+using System.Windows;
+using System.Windows.Data;
+
+namespace Aronium.Wpf.Toolkit.Converters
+{
+    public class NullOrEmptyToVisibilityConverter : IValueConverter
+    {
+        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
+        {
+            return string.IsNullOrWhiteSpace((string)value) ? Visibility.Visible : Visibility.Collapsed;
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
+        {
+            return Binding.DoNothing;
+        }
+    }
+}

Aronium.Wpf.Toolkit/Validators/NumericValidationRule.cs

@@ -17,7 +17,7 @@ public override ValidationResult Validate(object value, CultureInfo cultureInfo)
         {
             if (AllowNull && string.IsNullOrEmpty(value?.ToString()))
             {
-                return new ValidationResult(true, null);
+                return ValidationResult.ValidResult;
             }
 
             bool isNumberInRange = true;