Blazor 枚举范围，CS1729 'RangeAttribute' 不包含采用 4 个参数的构造函数

Question

我正在重写从 BlazorApp 到基于 BlazorApp Core 的应用程序的代码片段。突然现在它在定义 RangeAttribute 时抛出错误。

为什么我收到错误：

“CS1729 'RangeAttribute' 不包含采用 4 个参数的构造函数 TradeNow.Client”

我的代码如下：

using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Threading.Tasks;

namespace TradeNow.Client.Pages.Adverts.Data
{
    public class SellBuy
    {
            [Required]
            [Range(typeof(SellBuyN), nameof(SellBuyN.Sell), typeof(SellBuyN), nameof(SellBuyN.Buy), ErrorMessage = "Select if you are buying or selling")]
            public SellBuyN SellBuyN { get; set; }
    }
    public enum SellBuyN { Sell, Unknown, net, smth, Buy }
}

Answer 1

来自文档：https://docs.microsoft.com/en-us/dotnet/api/system.componentmodel.dataannotations.rangeattribute?view=net-5.0

您可以看到构造函数从不接受 4 个参数：

Constructors
CONSTRUCTORS
RangeAttribute(Double, Double)  
Initializes a new instance of the RangeAttribute class by using the specified minimum and maximum values.

RangeAttribute(Int32, Int32)    
Initializes a new instance of the RangeAttribute class by using the specified minimum and maximum values.

RangeAttribute(Type, String, String)    
Initializes a new instance of the RangeAttribute class by using the specified minimum and maximum values and the specific type.

Blazor 枚举范围，CS1729 'RangeAttribute' 不包含采用 4 个参数的构造函数

Blazor Enum range, CS1729 'RangeAttribute' does not contain a constructor that takes 4 arguments

c#

blazor

.net-5