wip

Toolkit.UI.WinUI/IsStringNotNullOrEmptyConverter.cs

@@ -0,0 +1,10 @@
+using System;
+
+namespace Toolkit.UI.WinUI;
+
+public class IsStringNotNullOrEmptyConverter : 
+    ValueConverter<string, bool>
+{
+    protected override bool ConvertTo(string value, Type? targetType, object? parameter, string? language) => 
+        !string.IsNullOrEmpty(value);
+}

Toolkit.UI.WinUI/StringFormatConverter.cs

@@ -4,24 +4,17 @@ using System.Globalization;
 namespace Toolkit.UI.WinUI;
 
 public class StringFormatConverter : 
-    ValueConverter<object, object>
+    ValueConverter<object?, object?>
 {
     public string? StringFormat { get; set; }
 
-    protected override object? ConvertTo(object value, 
+    protected override object? ConvertTo(object? value, 
         Type? targetType,
         object? parameter, 
         string? language)
     {
-        if (value is null)
-        {
-            return null!;
-        }
-
-        if (string.IsNullOrEmpty(StringFormat))
-        {
-            return value.ToString()!;
-        }
+        if (value is null) return null!;
+        if (StringFormat is not { Length: > 0}) return $"{value}"!;
 
         try
         {

Toolkit.UI.WinUI/ValidationBooleanConverter.cs

@@ -0,0 +1,27 @@
+using System;
+using Toolkit.Foundation;
+
+namespace Toolkit.UI.WinUI;
+
+public class ValidationBooleanConverter :
+    ValueConverter<IReadOnlyIndexDictionary<string, string>, bool>
+{
+    public string? Property { get; set; }
+
+    public bool TrueValue { get; set; } = true;
+
+    public bool FalseValue { get; set; } = false;
+
+    protected override bool ConvertTo(IReadOnlyIndexDictionary<string, string> value,
+        Type? targetType,
+        object? parameter,
+        string? language)
+    {
+        if (Property is { Length: > 0 } && value.ContainsKey(Property))
+        {
+            return TrueValue;
+        }
+
+        return FalseValue;
+    }
+}

Toolkit.UI.WinUI/ValidationMessageConverter.cs

@@ -0,0 +1,23 @@
+using System;
+using Toolkit.Foundation;
+
+namespace Toolkit.UI.WinUI;
+
+public class ValidationMessageConverter :
+    ValueConverter<IReadOnlyIndexDictionary<string, string>, string?>
+{
+    public string? Property { get; set; }
+
+    protected override string? ConvertTo(IReadOnlyIndexDictionary<string, string> value,
+        Type? targetType,
+        object? parameter,
+        string? language)
+    {
+        if (Property is { Length: > 0 } && value.TryGetValue(Property, out string? message))
+        {
+            return message;
+        }
+
+        return default;
+    }
+}