ShrlAlgoToolkit/ShrlAlgoToolkit.Mvvm/Attributes/IsNumericAttribute.cs

using System.ComponentModel.DataAnnotations;
using System.Globalization;

namespace ShrlAlgoToolkit.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。");
    }
    public override bool IsValid(object value)
    {
        return double.TryParse(value.ToString(), out var _);
    }
    public override string FormatErrorMessage(string name)
    {
        return string.Format(CultureInfo.CurrentCulture, base.ErrorMessageString, [name]);
    }
}