144 lines
5.6 KiB
C#
144 lines
5.6 KiB
C#
// Admin.NET 项目的版权、商标、专利和其他相关权利均受相应法律法规的保护。使用本项目应遵守相关法律法规和许可证的要求。
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//
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// 本项目主要遵循 MIT 许可证和 Apache 许可证(版本 2.0)进行分发和使用。许可证位于源代码树根目录中的 LICENSE-MIT 和 LICENSE-APACHE 文件。
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//
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// 不得利用本项目从事危害国家安全、扰乱社会秩序、侵犯他人合法权益等法律法规禁止的活动!任何基于本项目二次开发而产生的一切法律纠纷和责任,我们不承担任何责任!
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namespace Admin.NET.Core;
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/// <summary>
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/// 字典值合规性校验特性
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/// </summary>
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[SuppressSniffer]
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[AttributeUsage(AttributeTargets.Property | AttributeTargets.Field)]
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public class DictAttribute : ValidationAttribute, ITransient
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{
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/// <summary>
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/// 字典编码
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/// </summary>
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public readonly string DictTypeCode;
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/// <summary>
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/// 是否多选
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/// </summary>
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public readonly bool Multiple;
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/// <summary>
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/// 是否允许空字符串
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/// </summary>
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[Obsolete("参数已废弃,逻辑已删除,请使用[Required]特性校验必填")]
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public bool AllowEmptyStrings { get; set; } = false;
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/// <summary>
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/// 允许空值,有值才验证,默认 false
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/// </summary>
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[Obsolete("参数已废弃,逻辑已删除,请使用[Required]特性校验必填")]
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public bool AllowNullValue { get; set; } = false;
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/// <summary>
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/// 构造函数
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/// </summary>
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/// <param name="dictTypeCode">字典类型编码</param>
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/// <param name="multiple">是否允许多选</param>
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/// <param name="errorMessage">自定义错误消息</param>
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public DictAttribute(string dictTypeCode = "", bool multiple = false, string errorMessage = "字典值不合法!")
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{
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DictTypeCode = dictTypeCode;
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Multiple = multiple;
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ErrorMessage = errorMessage;
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}
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/// <summary>
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/// 验证方法(异步安全)
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/// </summary>
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private async Task<ValidationResult> IsValidAsync(object? value, ValidationContext validationContext, CancellationToken cancellation)
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{
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// 1. 空值检查
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if (IsEmpty(value)) return ValidationResult.Success;
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// 2. 获取属性类型
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var property = validationContext.ObjectType.GetProperty(validationContext.MemberName!);
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if (property == null)
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return new ValidationResult($"未知属性: {validationContext.MemberName}");
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var propertyType = Nullable.GetUnderlyingType(property.PropertyType) ?? property.PropertyType;
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// 3. 枚举类型校验
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if (propertyType.IsEnum)
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{
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return !Enum.IsDefined(propertyType, value!) ? new ValidationResult($"提示:{ErrorMessage}|枚举值【{value}】不是有效的【{propertyType.Name}】枚举类型值!") : ValidationResult.Success;
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}
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// 4. 获取字典服务
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var sysDictDataService = validationContext.GetService(typeof(SysDictDataService)) as SysDictDataService
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?? App.GetRequiredService<SysDictDataService>();
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// 5. 异步获取字典数据
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var dictDataList = await sysDictDataService.GetDataList(DictTypeCode);
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var dictHashSet = new HashSet<string>(dictDataList.Select(d => d.Value), StringComparer.OrdinalIgnoreCase);
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// 6. 单选校验
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if (!Multiple)
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{
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var valStr = value!.GetType().IsEnum ? value.ToInt().ToString() : value.ToString();
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if (string.IsNullOrEmpty(valStr) || !dictHashSet.Contains(valStr))
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{
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return new ValidationResult($"提示:{ErrorMessage}|字典【{DictTypeCode}】不包含【{value}】!");
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}
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return ValidationResult.Success;
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}
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// 7. 多选校验
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if (value is string stringValue)
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{
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var codes = stringValue.Split(',');
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foreach (var code in codes)
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{
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if (!dictHashSet.Contains(code))
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{
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return new ValidationResult($"提示:{ErrorMessage}|字典【{DictTypeCode}】不包含【{code}】!");
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}
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}
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return ValidationResult.Success;
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}
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// 集合类数据校验
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if (value is IList listValue)
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{
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foreach (var item in listValue)
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{
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var itemStr = item.GetType().IsEnum ? item.ToInt().ToString() : item.ToString();
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if (string.IsNullOrEmpty(itemStr) || !dictHashSet.Contains(itemStr))
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{
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return new ValidationResult($"提示:{ErrorMessage}|字典【{DictTypeCode}】不包含【{item}】!");
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}
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}
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return ValidationResult.Success;
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}
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// 8. 类型不匹配
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return new ValidationResult($"提示:{ErrorMessage}|不支持的值类型:{value?.GetType().Name},多选时应为逗号分隔字符串或集合类型。");
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}
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/// <summary>
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/// 同步入口(兼容旧版调用)
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/// </summary>
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protected override ValidationResult IsValid(object? value, ValidationContext validationContext)
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{
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return IsValidAsync(value, validationContext, CancellationToken.None).ConfigureAwait(false).GetAwaiter().GetResult();
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}
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/// <summary>
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/// 判断值是否为空(null、空字符串、空集合)
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/// </summary>
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private static bool IsEmpty(object? value)
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{
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return value switch
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{
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null => true,
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string s => string.IsNullOrWhiteSpace(s),
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IList list => list.Count == 0,
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_ => false
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};
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}
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} |