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

using System.ComponentModel.DataAnnotations;

namespace ShrlAlgo.Toolkit.Mvvm.Attributes;

[AttributeUsage(AttributeTargets.Property | AttributeTargets.Field | AttributeTargets.Parameter)]
public sealed class IsNumericAttribute : ValidationAttribute
{
    protected override ValidationResult IsValid(object value, ValidationContext validationContext)
    {
        return double.TryParse(value.ToString(), out var _) ? ValidationResult.Success : new("输入内容不是数值。");
    }
}