ShrlAlgoToolkit/ShrlAlgo.Toolkit.Mvvm/Attributes/MaximumAttribute.cs

using System.ComponentModel.DataAnnotations;

namespace ShrlAlgo.Toolkit.Mvvm.Attributes;

[AttributeUsage(AttributeTargets.Property | AttributeTargets.Field | AttributeTargets.Parameter)]
public sealed class MaximumAttribute : ValidationAttribute
{
	public MaximumAttribute(double maxValue = 0)
	{
		MaxValue = maxValue;
	}

	public double MaxValue { get; }

	protected override ValidationResult IsValid(object value, ValidationContext validationContext)
	{
		return double.TryParse(value.ToString(), out var d) && d <= MaxValue ? ValidationResult.Success : new ValidationResult("输入值超出范围");
	}
}