using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;namespace MvcApplication1.Models
{/// <summary>/// 表现层实体集合/// </summary>public class UserCompanyViewModels{public UserViewModel User { set; get; }public List<CompanyViewModel> Companys { set; get; }public UserCompanyViewModels(){User = new UserViewModel();Companys = new List<CompanyViewModel>();}/// <summary>/// Bo To Vo/// </summary>/// <param name="user">业务层实体对象</param>/// <param name="companys">业务层实体对象集合</param>/// <returns>表现层实体</returns>public UserCompanyViewModels ToVo(UserModel user, List<CompanyModel> companys){UserCompanyViewModels models = new UserCompanyViewModels();if (user != null){models.User.UserID = user.UserID;models.User.UserName = user.UserName;}if (companys != null && companys.Count > 0){foreach (var item in companys){CompanyViewModel company = new CompanyViewModel();company.CompanyID = item.CompanyID;company.CompanyName = item.CompanyName;models.Companys.Add(company);}}return models;}}/// <summary>/// 表现层实体/// </summary>public class UserViewModel{public int UserID { set; get; }public string UserName { set; get; }}/// <summary>/// 表现层实体/// </summary>public class CompanyViewModel{public int CompanyID { set; get; }public string CompanyName { set; get; }}/// <summary>/// 业务层实体/// </summary>public class UserModel{public int UserID { set; get; }public string UserName { set; get; }public string UserGander { set; get; }public string UserAddress { set; get; }/// <summary>/// Vo To Bo/// </summary>/// <param name="models">表现层实体对象</param>/// <returns>业务层实体</returns>public UserModel ToBo(UserCompanyViewModels models){UserModel user = new UserModel();if (models != null&&models.User!=null){user.UserID = models.User.UserID;user.UserName = models.User.UserName;}return user;}}/// <summary>/// 业务层实体/// </summary>public class CompanyModel{public int CompanyID { set; get; }public string CompanyName { set; get; }public string CompanyAddress { set; get; }/// <summary>/// Vo To Bo/// </summary>/// <param name="models">表现层实体对象</param>/// <returns>业务层实体</returns>public List<CompanyModel> ToBo(UserCompanyViewModels models){List<CompanyModel> companys = new List<CompanyModel>();if (models != null&&models.Companys!=null && models.Companys.Count > 0){foreach (var item in models.Companys){CompanyModel company = new CompanyModel();company.CompanyID = item.CompanyID;company.CompanyName = item.CompanyName;companys.Add(company);}}    return companys;}}
}

在这个模型中具备了MVC中Model和BLL层model的转换方法，可能有有人要问为什么，我想说的是如果加入了这种模型转换方法，在同一controller不同action要使用的时候，就可以轻松转换页面视图模型和逻辑层模型的转换，不用重复写代码，简单的封装思想。

二. 在Controller中使用，如下：

        [HttpPost]public ActionResult Create(FormCollection collection,UserCompanyViewModels models){//如果控件有ID的话，可以通过控件Names属性来取值，如var a = collection["User.UserID"];try{// TODO: Add insert logic hereUserModel user = new UserModel();user = user.ToBo(models);                //然后调用BLL层执行数据库User表操作Save,Update等方法CompanyModel company = new CompanyModel();List<CompanyModel> companys = company.ToBo(models);//然后调用BLL层数据库Company表操作Save,Update等方法return View("Create", models);}catch{return View("Create");}}

这里可以看到，因为View视图可能使用到的是一个复杂的model，这个model是业务层几个model的组合，甚至是集合List类型，所以在这里可以轻松转换。