使用带有ValidationMessage的inherits InputBase<DateTime>的自定义Blazor DateTime

using Microsoft.AspNetCore.Components.Forms;
using Microsoft.AspNetCore.Components.Web;
using System.Globalization;

public class CustomDateTimeInput : InputBase<DateTime?>
{
    protected override bool TryParseValueFromString(string? value, out DateTime? result, out string? validationErrorMessage)
    {
        if (DateTime.TryParseExact(value, "yyyy-MM-dd", CultureInfo.InvariantCulture, DateTimeStyles.None, out DateTime parsedValue))
        {
            result = parsedValue;
            validationErrorMessage = null;
            return true;
        }
        else
        {
            result = null;
            validationErrorMessage = "日期格式不正确，应为 yyyy-MM-dd";
            return false;
        }
    }

    protected override void OnInput(ChangeEventArgs e)
    {
        var stringValue = e.Value?.ToString();
        if (!string.IsNullOrEmpty(stringValue))
        {
            if (TryParseValueFromString(stringValue, out var parsedValue))
            {
                CurrentValueAsString = stringValue; // 更新绑定的值
            }
        }
        else
        {
            CurrentValueAsString = null;
        }
        InvokeValidation();
    }

    protected override string FormatValueAsString(DateTime? value)
    {
        return value?.ToString("yyyy-MM-dd", CultureInfo.InvariantCulture) ?? string.Empty;
    }
}

<EditForm Model="@model">
    <CustomDateTimeInput @bind-Value="model.Date" />
    <ValidationMessage For="@(() => model.Date)" />
</EditForm>

@code {
    private ModelClass model = new ModelClass();
}