22 lines
802 B
C#
22 lines
802 B
C#
using System.ComponentModel.DataAnnotations;
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using System.Globalization;
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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 IsNumericAttribute : ValidationAttribute
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{
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protected override ValidationResult IsValid(object value, ValidationContext validationContext)
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{
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return double.TryParse(value.ToString(), out var _) ? ValidationResult.Success : new("输入内容不是数值。");
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}
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public override bool IsValid(object value)
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{
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return double.TryParse(value.ToString(), out var _);
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}
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public override string FormatErrorMessage(string name)
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{
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return string.Format(CultureInfo.CurrentCulture, base.ErrorMessageString, [name]);
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}
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}
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