Masuit.Tools/Masuit.Tools.Abstractions/Validator/MaxValueAttribute.cs

using System;
using System.ComponentModel.DataAnnotations;

namespace Masuit.Tools.Core.Validator;

/// <summary>
/// 最大值校验
/// </summary>
public class MaxValueAttribute : ValidationAttribute
{
    private double MaxValue { get; }

    /// <summary>
    /// 最大值
    /// </summary>
    /// <param name="value"></param>
    public MaxValueAttribute(double value)
    {
        MaxValue = value;
    }

    /// <summary>
    /// 最大值校验
    /// </summary>
    /// <param name="value"></param>
    /// <returns></returns>
    public override bool IsValid(object value)
    {
        if (value is null)
        {
            return true;
        }

        var input = Convert.ToDouble(value);
        return input <= MaxValue;
    }

    /// <summary>Applies formatting to an error message, based on the data field where the error occurred.</summary>
    /// <param name="name">The name to include in the formatted message.</param>
    /// <returns>An instance of the formatted error message.</returns>
    public override string FormatErrorMessage(string name)
    {
        return base.FormatErrorMessage(name);
    }
}