添加项目文件。

Sai.Toolkit.Mvvm/Attributes/MinimumAttribute.cs

@@ -0,0 +1,19 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace Sai.Toolkit.Mvvm.Attributes;
+
+[AttributeUsage(AttributeTargets.Property | AttributeTargets.Field | AttributeTargets.Parameter)]
+public sealed class MinimumAttribute : ValidationAttribute
+{
+    public MinimumAttribute(double minValue = 0)
+    {
+        MinValue = minValue;
+    }
+
+    public double MinValue { get; }
+
+    protected override ValidationResult IsValid(object value, ValidationContext validationContext)
+    {
+        return double.TryParse(value.ToString(), out var d) && d >= MinValue ? ValidationResult.Success : new ValidationResult("ÊäÈëÖµ³¬³ö·¶Î§");
+    }
+}