角色模型验证与编辑-优快云博客

S1:添加部分类。和验证

using System.ComponentModel.DataAnnotations;

namespace STOA.RichModel {

    [MetadataType(typeof(RoleValidation))]
    public partial class Role {

    }
    public class RoleValidation {

        [Editable(false)]
        [Display(Name = "编号")]
        public string RoleID { get; set; }

        [Required]
        [LengAttribute(MinLength = 5, MaxLength = 10, ErrorMessage = "长度不符合要求")]
        [Display(Name = "姓名")]
        public string Name { get; set; }

        [Required]
        [StringLength(100)]
        [Display(Name = "注释")]
        public string Description { get; set; }

        //  [Required]

        [Display(Name = "状态")]
        public string State { get; set; }
    }

//自定义的
    public class LengAttribute : System.ComponentModel.DataAnnotations.ValidationAttribute {
        public override bool IsValid(object value) {
            if (value == null || value.ToString().Length < MinLength || value.ToString().Length > MaxLength) {
                return false;
            }
            return true;
        }
        public int MinLength { get; set; }
        public int MaxLength { get; set; }
    }

}

S2:调用验证在 edit页面

[HttpPost]

        [ValidateFilterAttribute(Description = "提交编辑")]
        public ActionResult Edit(int id, STOA.RichModel.Role role) {
            try {
                if (!ModelState.IsValid) {
                    return View();

                }
                // TODO: Add update logic here
                STOA.RichModel.STOADBContainer s = new RichModel.STOADBContainer();
                var rolefromdb = s.Role.Where(_ => _.RoleID == role.RoleID).FirstOrDefault();

                TryUpdateModel(rolefromdb);

                s.SaveChanges();
                return RedirectToAction("list");
            } catch {
                return View();
            }
        }

S3:显示在页面

<%@ Page Language="C#" Inherits="System.Web.Mvc.ViewPage<STOA.RichModel.Role>" %>