MVC 5学习总结笔记1

01.使用MVC自带的DataAnnotations实现数据验证

public class ExternalLoginConfirmationViewModel
{
[Required]
[Display(Name = "Email")]
public string Email { get; set; }
}

自定义数据验证功能(用法及定义):

using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Web; namespace MVC5.Models
{
public class Employee
{
[Key]
public int EmployeeId { get; set; } [FirstNameValidation]
public string FirstName { get; set; }
[StringLength(,ErrorMessage="Last name length should not more than 5!")]
public string LastName { get; set; }
public int Salary { get; set; }
}
}
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Web; namespace MVC5.Models
{
public class FirstNameValidation:ValidationAttribute
{
protected override ValidationResult IsValid(object value, ValidationContext validationContext)
{
if (value == null)
{
return new ValidationResult("Please input FirstName");
}
else
{
if (value.ToString().Contains("@"))
{
return new ValidationResult("The first name should not contains @!");
}
}
return ValidationResult.Success;
}
}
}

02.Model Binder

在.NET的核心MVC中,Model Binder用于映射从HTTP请求到Action方法的参数,可以参考链接

创建自定义 Model Binder ,代替默认的Model Binder.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc; namespace MVC5.Models
{
public class MyEmployeeModelBinder:DefaultModelBinder
{
protected override object CreateModel(ControllerContext controllerContext,ModelBindingContext bingingContext,Type modelType)
{
Employee emp = new Employee();
emp.FirstName = controllerContext.RequestContext.HttpContext.Request["FName"].ToString();
emp.LastName = controllerContext.RequestContext.HttpContext.Request["LName"].ToString();
emp.Salary = int.Parse(controllerContext.RequestContext.HttpContext.Request["Salary"].ToString());
return emp;
}
}
}

03. Action的特性:

[NonAction]表示将该Action作为方法使用;

[ChildActionOnly]表示它只能在前台View中通过Html.Action或Html.RenderAction来使用,不能通过在地址栏输入地址直接访问;

[ActionName]表示为某个Action重新指定一个新的名字来使用,如下所示,必须使用新名称来进行调用,即:@Url.Action("GetActionNameByNewName", "Patient")'。

/// <summary>
/// Testing for ActionName
/// </summary>
/// <returns></returns>
[ActionName("GetActionNameByNewName")]
public ActionResult GetActionNameByOldName()
{
return xxx;
}

04. Razor代码带花括号和没有花括号的区别:

@符号后没有花括号只是简单的显示变量或表达式的值,如:

  <li><a href=@Menu.URL>@Menu.DisplayName</a></li>;

@符号后有花括号则表明是对服务器代码的执行,如:

  @{

         var ParentMenu = Model.Where(x => x.ParentId == 0);

     }

05. 认证属性:[Authorize]

为了确保每个Action方法在执行前都通过当前系统的登录验证,则需要在每个要验证Action的方法前加上[Authorize];

06. FormsAuthentication.SetAuthCookie(string userName,bool createPersistentCookie)

作用:将当前已通过验证的用户的登录名加密后放入Cookie中;

参数分析:

userName :The name of an authenticated user. This does not have to map to a Windows account.

译:已通过验证的用户的登录名,和Windows账户没有强制的对应关系;

createPersistentCookie :true to create a persistent cookie (one that is saved across browser sessions); otherwise, false.

译:是否要对Cookie进行永久保存?

07. MVC过滤器:

可以参考一下对过滤器的详细介绍:示例

08. @model与@Model的区别:

MVC 5学习总结笔记1

09. Partial定义方法并调用

<ul class="dropdown-menu">
@GenerateMenuList(item.Id)
</ul> @helper GenerateMenuList(int id)
{
var subMenu = Model.RoleFunction.Where(x => x.ParentId == id).OrderBy(x => x.Ordering);
foreach (NCGH.UI.Common.ViewModels.RoleFunctionViewModel item in subMenu)
{
var subChildCount = Model.RoleFunction.Where(x => x.ParentId == item.Id).Count();
if (subChildCount == )
{
<li>@Html.ActionLink(item.DisplayName, "List", item.URL, IsAreaProject ? null : new { area = item.ParentId }, null)</li>
} if (subChildCount > )
{
<li class="dropdown-submenu">
<a tabindex="-1" href="#">@item.DisplayName</a>
<ul class="dropdown-menu">
@GenerateMenuList(item.Id)
</ul>
</li>
}
}
}

10. 常见接口:

HttpContext:获取客户端向服务端请求的相关信息,对Request/Response/Server/Session等进行了封装;

总结: A. ViewBag实质还是在内部调用ViewData;

B. ViewModel是用于Model与View之间进行数据传递的;

     C.  RouteTable:存储URL;

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