更新整理

ShrlAlgoToolkit.Mvvm/Attributes/GreaterThanAttribute.cs

@@ -0,0 +1,22 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace ShrlAlgoToolkit.Mvvm.Attributes;
+
+[AttributeUsage(AttributeTargets.Property | AttributeTargets.Field | AttributeTargets.Parameter)]
+public sealed class GreaterThanAttribute : ValidationAttribute
+{
+    public GreaterThanAttribute(string propertyName)
+    {
+        PropertyName = propertyName;
+    }
+
+    public string PropertyName { get; }
+
+    protected override ValidationResult IsValid(object value, ValidationContext validationContext)
+    {
+        object instance = validationContext.ObjectInstance,
+            otherValue = instance.GetType().GetProperty(PropertyName).GetValue(instance);
+
+        return ((IComparable)value).CompareTo(otherValue) > 0 ? ValidationResult.Success : new($"当前值小于{value}");
+    }
+}