MVC3 小记

 1) MVC3 中的Model,字段的验证属性,
   <1> [Required] //必填项,
   <2> [DataType] //字段属性, 如: DataType.Password , DataType.EmailAddress
   <3> [Display(name="DisplayName")] //显示名称
   <4> [StringLength] //设置字段长度大小
   <5> [Remote("CheckIsExists","Account",AdditionalFields="FieldsName",ErrorMessage="")] //验证属性方法,
   <6> [Compare("FieldName",ErrorMessage="")] //比较相等
   <7> [RegularExpression(@"正则表达式",ErrorMessage="")] //正则验证

  Views
  使Views的page与Model对应, 在页头需要声明Model, 如: @model MvcApplication.Models.LogOnModel
  一个与Model对应标准From的写法:
  @using (Html.BeginForm()) {
    <div>
        <fieldset>
            <legend>Account Information</legend>

            <div class="editor-label">
                @Html.LabelFor(m => m.UserName)
            </div>
            <div class="editor-field">
                @Html.TextBoxFor(m => m.UserName)
                @Html.ValidationMessageFor(m => m.UserName)
            </div>

            <div class="editor-label">
                @Html.LabelFor(m => m.Password)
            </div>
            <div class="editor-field">
                @Html.PasswordFor(m => m.Password)
                @Html.ValidationMessageFor(m => m.Password)
            </div>

            <div class="editor-label">
                @Html.CheckBoxFor(m => m.RememberMe)
                @Html.LabelFor(m => m.RememberMe)
            </div>

            <p>
                <input type="submit" value="Log On" />
            </p>
        </fieldset>
    </div>
   }

   Controllers的写法是: 文件名 + Controller, 如Views下有个Account, 那么对应的Controllers就一定有个AccountController类,
   Action对应Controller里的一个方法, 如: LogOn.cshtml对应 LogOn().
    [HttpPost]
        public ActionResult LogOn(LogOnModel model, string returnUrl)
        {
            if (ModelState.IsValid)
            {
                if (Membership.ValidateUser(model.UserName, model.Password))
                {
                    FormsAuthentication.SetAuthCookie(model.UserName, model.RememberMe);
                    if (Url.IsLocalUrl(returnUrl) && returnUrl.Length > 1 && returnUrl.StartsWith("/")
                        && !returnUrl.StartsWith("//") && !returnUrl.StartsWith("/\\"))
                    {
                        return Redirect(returnUrl);
                    }
                    else
                    {
                        return RedirectToAction("Index", "Home");
                    }
                }
                else
                {
                    ModelState.AddModelError("", "The user name or password provided is incorrect.");
                }
            }

            // If we got this far, something failed, redisplay form
            return View(model);
        }

2)    MVC3通过Global.asax中的RegisterRoutes() 来实现跳转到具体执行的类中, 如:
   public static void RegisterRoutes(RouteCollection routes)
        {
            routes.IgnoreRoute("{resource}.axd/{*pathInfo}");

            routes.MapRoute(
                "Default", // Route name
                "{controller}/{action}/{id}", // URL with parameters
                new { controller = "Home", action = "Index", id = UrlParameter.Optional } // Parameter defaults
            );

        }

3)   记录一点Model里远程验证[Remote()]的使用.
  新建一个测试Model: TestModel, 如:
    public class TestModel
    {
        [Required]
        [Display(Name="First Name")]
        [StringLength(10,MinimumLength=2,ErrorMessage="{0} is invalid,maxlength = {1} and minlength = {2}")]
        public string FirstName { get; set; }

        [Required]
        [Display(Name="Last Name")]
        [StringLength(10, MinimumLength = 2, ErrorMessage = "{0} is invalid , max length = {1} the minlength = {2}")]
        [Remote("CheckIsExists", "Account", AdditionalFields = "FirstName", ErrorMessage = "{0} was exists,please change to other one.")]
        public string LastName { get; set; }
    }
   TestRemote.cshtml页面如下:

   @model MvcApplication.Models.TestModel
   @{
    ViewBag.Title = "TestRemote";
    Layout = "~/Views/Shared/_Layout.cshtml";
   }

   <script src="@Url.Content("~/Scripts/jquery.validate.min.js")" type="text/javascript"></script>
   <script src="@Url.Content("~/Scripts/jquery.validate.unobtrusive.min.js")" type="text/javascript"></script>

   <h2>
   Test the Remote</h2>
   @Html.ValidationSummary(true, "the value of username is invalid, please middfied and try agin later.")
   @using (Html.BeginForm())
  {
    <div id="div">
        <fieldset>
            <div class="editor-label">
                @Html.LabelFor(m => m.FirstName)
            </div>
            <div class="editor-field">
                @Html.TextBoxFor(m => m.FirstName)
                @Html.ValidationMessageFor(m=>m.FirstName)
            </div>
            <div class="editor-label">
                @Html.LabelFor(m=>m.LastName)
            </div>
            <div class="editor-field">
                @Html.TextBoxFor(m=>m.LastName)
                @Html.ValidationMessageFor(m=>m.LastName)
                @Html.HiddenFor(m => m.FirstName)
            </div>
            <p>
                <input type="submit" value="Valid" />
            </p>
        </fieldset>
    </div>
   }

  注: 由于远程验证用到Jquery的验证方法, 因此 jquery.validate.min.js 和 jquery.validate.unobtrusive.min.js 文件引用不可少.

  Controller中的Action, CheckIsExists()如下:
  [HttpGet]
  public ActionResult CheckIsExists(Models.TestModel model)
  {
      bool exists = model.FirstName == "ppp" && model.LastName=="ppp" ? true : false;
      return Json(!exists, JsonRequestBehavior.AllowGet);
  }

 注: Romote中的AdditionalFields 可以声明多个Fields, 以逗号隔开. 但是在前台必须对应声明一个@Html.HiddenFor(...).