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