即使我修改了动作过滤器中的属性，ModelState 也会出现错误

Question

我已在以下操作过滤器本身中修改了 ActionType，但仍然收到模型状态错误，因为“字段 ActionType 必须匹配正则表达式 '1|2|3|4'。”

对于我的模型属性为

[RegularExpression("1|2|3|4")]

public int ActionType { get; set; }

我的 ActionType 枚举是

 public enum ActionType
        {
            Add = 1,
            Update = 2,
            Delete = 3,
            Search = 4
        }

动作过滤器是

public override void OnActionExecuting(System.Web.Http.Controllers.HttpActionContext actionContext)
        {
            var formData = actionContext.ActionArguments.FirstOrDefault().Value as EntityBase;
            if (formData != null)
            {
                string methodType = actionContext.Request.Method.Method;
                switch (methodType.ToUpper())
                {
                    case "POST":
                        formData.ActionType = (int)ActionType.Add;
                        break;
                    case "PUT":
                        formData.ActionType = (int)ActionType.Update;
                        break;
                    case "DELETE":
                        formData.ActionType = (int)ActionType.Delete;
                        break;
                    case "GET":
                        formData.ActionType = (int)ActionType.Search;
                        break;
                    // Your errors
                }
            }
            base.OnActionExecuting(actionContext);
        }

Answer 1

您可以将 ActionType 属性上的数据注释更改为使用 Range 代替 RegularExpression 吗？

[Range(1, 4)]
public int ActionType { get; set; }