用MVC6写webapi，添加model校验过滤器

需求：过滤验证实体

实体code：

[ StringLength (32, MinimumLength = 1, ErrorMessage = "{0} must be a string.  Its min length is {2}, its max length is {1}." )]

[ Required ]

public string OrderID { get ; set ; }

过滤器代码(这里会直接抛出错误信息)

  public class ValidateModelStateFilter : ActionFilterAttribute

    {

        public override void OnActionExecuted( ActionExecutedContext context)

        {

            if (!context.ModelState.IsValid)

            {

                context.Result = new BadRequestObjectResult (context.ModelState);

            }

        }

    }

过滤器注入代码

  public void ConfigureServices( IServiceCollection services)

        {

            // Add framework services.

            services.AddApplicationInsightsTelemetry(Configuration);

            services.AddMvc(options =>

            {

                options.Filters.Add(newValidateModelStateFilter());

            });

                     services.AddSingleton< IOrderRepo , OrderRepo >();

                     services.AddSwaggerGen();

                     services.ConfigureSwaggerGen(options =>

                     {

                           options.SingleApiVersion( new Info

                           {

                                  Version = "v1" ,

                                  Title = "Zebra VMI Api" ,

                                  Description = "Zebra VMI Api by @360Zebra" ,

                                  TermsOfService = "NA" ,

                                  Contact = new Contact ()

                                  {

                                         Name = "斑马小二" ,

                                         Email = "jay.shen@360zebra.com" ,

                                         Url = "http://www.360zebra.com"

                                  }

                           });

                     });

              }

参考链接 http://www.cnblogs.com/dotNETCoreSG/p/aspnetcore-4_4_3-filters.html