MVC 学习系列文章（三）Controller And Action

HomeController：

public class HomeController : Controller
{
    public ActionResult Index()
    {
        return this.View();
    }

    //跳转至WebSite
    public ActionResult RedirectToGoogle()
    {
        return this.Redirect("http://www.google.com.hk/");
    }

    //跳转至Action
    public ActionResult RedirectToEmployeesIndex()
    {
        return this.RedirectToAction("Index", "Employees");
    }

    //默认情况下，MVC 框架将 controller 类的所有公共方法都视为操作方法。
    //如果您的 controller 类包含公共方法，并且您不希望它成为操作方法，
    //则必须用 NonActionAttribute 特性标记该方法。
    [NonAction]
    public ActionResult NonActionMethod()
    {
        return this.View();
    }

    //处理未知Action异常
    protected override void HandleUnknownAction(string actionName)
    {
        base.HandleUnknownAction(actionName);
    }
}

Home.Index：

@{
    ViewBag.Title = "Home";
}
<h2>
    Home</h2>
@Html.ActionLink("Google", "RedirectToGoogle")
@Html.ActionLink("Employees.Index", "RedirectToEmployeesIndex")

EmployeesController：

public class EmployeesController : Controller
{
    public ActionResult Index()
    {
        var northwind = DataContextFactory.CreateNorthwind();
        return View(northwind.Employees);
    }

    //处理参数，id是Route参数，birthDate是QueryString
    public ActionResult Details(int id, DateTime? birthDate)
    {
        return View("Details", this.GetEmployeeById(id));
    }

    //处理参数，处理Form参数传递
    public ActionResult Save()
    {
        var northwind = DataContextFactory.CreateNorthwind();
        int iEmployeeID = Convert.ToInt32(Request.Form["EmployeeID"].Trim());
        Employee employee = (from e in northwind.Employees
                                where e.EmployeeID == iEmployeeID
                                select e).First<Employee>();
        employee.FirstName = Request.Form["FirstName"].Trim();
        employee.LastName = Request.Form["LastName"].Trim();
        employee.HomePhone = Request.Form["HomePhone"].Trim();
        northwind.SubmitChanges();

        return View("Details", employee);
    }

    private Employee GetEmployeeById(int id)
    {
        var northwind = DataContextFactory.CreateNorthwind();
        Employee employee = (from e in northwind.Employees
                                where e.EmployeeID == id
                                select e).First<Employee>();
        return employee;
    }
}

Employees.Index：

@using MVCDemo.Example02.Models;
@{ 
    ViewBag.Title = "Employees"; 
}
<h2>
    Employees</h2>
<ul>
    @foreach (Employee employee in this.Model)
    {
        <li>
            @Html.ActionLink(employee.FirstName, "Details", new
               {
                   id = employee.EmployeeID,
                   birthDate = employee.BirthDate
               })
        </li>
    }
</ul>

Employees.Details：

@model MVCDemo.Example02.Models.Employee
@{
    ViewBag.Title = "Details";
}
<h2>
    Details</h2>
@using (Html.BeginForm("Save", "Employees"))
{
    @Html.ValidationSummary(true)
    <table>
        <tr>
            <td>@Html.LabelFor(model => model.EmployeeID)</td>
            <td>@Html.DisplayFor(model => model.EmployeeID)</td>
            <td></td>
        </tr>
        <tr>
            <td>@Html.LabelFor(model => model.FirstName)</td>
            <td>@Html.TextBoxFor(model => model.FirstName)</td>
            <td>@Html.ValidationMessageFor(model => model.FirstName)</td>
        </tr>
        <tr>
            <td>@Html.LabelFor(model => model.LastName)</td>
            <td>@Html.TextBoxFor(model => model.LastName)</td>
            <td>@Html.ValidationMessageFor(model => model.LastName)</td>
        </tr>
        <tr>
            <td>@Html.LabelFor(model => model.HomePhone)</td>
            <td>@Html.TextBoxFor(model => model.HomePhone)</td>
            <td>@Html.ValidationMessageFor(model => model.HomePhone)</td>
        </tr>
    </table>
    <input type="submit" value="Submit" />
}
@Html.ActionLink("Back", "Index")

若有疑问或不正之处，欢迎提出指正和讨论。