继续上一篇
上一篇，从core方式实现了一个Rabbitmq发送队列消息的接口，我们现在需要在模型验证里面加入验证失败就发送消息的部分
???
???[AttributeUsage(AttributeTargets.Class)]
???public class ValidateBaseAttribute:ValidationAttribute ???{ ???????protected override ValidationResult IsValid(object value, ValidationContext validationContext) ???????{ ???????????return ValidationResult.Success; ???????} ???}
这个验证特性打上之后，只要模型验证就触发
转到 ValidationContext 里面
在ValidateBaseAttribute内修改如下
??[AttributeUsage(AttributeTargets.Class)] ???public class ValidateBaseAttribute:ValidationAttribute ???{ ???????public Type Type { get; set; } ???????public string FunName { get; set; } ???????public ValidateBaseAttribute() ???????{ ???????} ???????public ValidateBaseAttribute(Type type, string funName) ???????{ ???????????Type = type; ???????????FunName = funName; ???????} ???????private bool ExecuteMethod(Type type, string funName,object value) ???????{ ???????????if (type == null || string.IsNullOrWhiteSpace(funName)) ???????????????return false; ???????????try ???????????{ ???????????????var instance = Activator.CreateInstance(type); ???????????????var method = type.GetMethod(funName); ???????????????return (bool)method.Invoke(instance, new[] { value }); ???????????} ???????????catch ???????????{ ???????????????return false; ???????????} ???????} ???????protected override ValidationResult IsValid(object value, ValidationContext validationContext) ???????{ ???????????var validate = ExecuteMethod(Type, FunName, value); ???????????if (validate) ???????????{ ???????????????var remoteSend = validationContext.GetService(typeof(IRemoteSend)) as IRemoteSend; ???????????????if (remoteSend != null) ???????????????{ ???????????????????remoteSend.Send(value);
???????????????????return new ValidationResult("验证失败"); ???????????????} ???????????} ???????????return ValidationResult.Success; ???????} ???}在默认的ValuesController内增加方法
???????[HttpGet("Check")] ???????public User Check([FromQuery]User user) ???????{ ???????????return user; ???????}我们修改以下User类
//增加一个验证特性[ValidateBase(typeof(ValidateClass), "IsValidateUser")]
???public class ValidateClass ???{ ???????public bool IsValidateUser(User user) ???????{ ???????????return user.Name.Equals("admin", StringComparison.InvariantCultureIgnoreCase) || user.Account.Equals("admin", StringComparison.InvariantCultureIgnoreCase); ???????} ???}只要用户名或者账号为admin
你以为这样就完了？No，模型验证要触发，必须有一个模型验证触发的过滤器
???public class ModelFilter : ActionFilterAttribute ???{ ???????public override void OnActionExecuting(ActionExecutingContext context) ???????{ ???????????if (!context.ModelState.IsValid) ???????????{ ???????????????string errorMessage = string.Empty; ???????????????var ErrorsModel = context.ModelState.Values.Where(item => { return item.Errors.Count > 0; }).ToList().FirstOrDefault(); ???????????????if (ErrorsModel != null) ???????????????{ ???????????????????errorMessage = ErrorsModel.Errors[0].ErrorMessage; ???????????????} ???????????????context.Result = new JsonResult(new { status = -1, msg = errorMessage }); ???????????????return; ???????????} ???????} ???}在ConfigureServices内的
//services.AddMvc();services.AddMvc(options => options.Filters.Add<ModelFilter>());
运行起来测试一下
当asp.net core偶遇docker一（模型验证和Rabbitmq 三）
原文地址：https://www.cnblogs.com/NCoreCoder/p/9939816.html