用ASP.NET Mvc 编写一个汽车管理系统

好的，下面是汽车管理系统的简单实现：

1. 创建一个 ASP.NET Mvc 项目并命名为 CarManagementSystem。

2. 在 Models 文件夹下创建一个名为 Car.cs 的类，定义汽车的属性：

public class Car
{
    public int Id { get; set; }
    public string Brand { get; set; }
    public string Model { get; set; }
    public int Year { get; set; }
    public double Price { get; set; }
}

3. 在 Controllers 文件夹下创建一个名为 CarController.cs 的控制器，定义汽车管理系统的操作：

public class CarController : Controller
{
    private List<Car> cars = new List<Car>()
    {
        new Car { Id = 1, Brand = "Toyota", Model = "Camry", Year = 2018, Price = 25000 },
        new Car { Id = 2, Brand = "Honda", Model = "Accord", Year = 2017, Price = 22000 },
        new Car { Id = 3, Brand = "Ford", Model = "Mustang", Year = 2019, Price = 35000 },
        new Car { Id = 4, Brand = "Chevrolet", Model = "Camaro", Year = 2016, Price = 30000 },
        new Car { Id = 5, Brand = "Nissan", Model = "Altima", Year = 2017, Price = 20000 }
    };

    // 显示所有汽车信息
    public ActionResult Index()
    {
        return View(cars);
    }

    // 显示指定汽车信息
    public ActionResult Details(int id)
    {
        var car = cars.FirstOrDefault(c => c.Id == id);

        if (car == null)
        {
            return HttpNotFound();
        }

        return View(car);
    }

    // 添加汽车信息
    [HttpGet]
    public ActionResult Create()
    {
        return View();
    }

    [HttpPost]
    public ActionResult Create(Car car)
    {
        if (ModelState.IsValid)
        {
            car.Id = cars.Max(c => c.Id) + 1;
            cars.Add(car);
            return RedirectToAction("Index");
        }

        return View(car);
    }

    // 修改汽车信息
    [HttpGet]
    public ActionResult Edit(int id)
    {
        var car = cars.FirstOrDefault(c => c.Id == id);

        if (car == null)
        {
            return HttpNotFound();
        }

        return View(car);
    }

    [HttpPost]
    public ActionResult Edit(Car car)
    {
        if (ModelState.IsValid)
        {
            var existingCar = cars.FirstOrDefault(c => c.Id == car.Id);

            if (existingCar != null)
            {
                existingCar.Brand = car.Brand;
                existingCar.Model = car.Model;
                existingCar.Year = car.Year;
                existingCar.Price = car.Price;
                return RedirectToAction("Index");
            }
        }

        return View(car);
    }

    // 删除汽车信息
    [HttpGet]
    public ActionResult Delete(int id)
    {
        var car = cars.FirstOrDefault(c => c.Id == id);

        if (car == null)
        {
            return HttpNotFound();
        }

        return View(car);
    }

    [HttpPost, ActionName("Delete")]
    public ActionResult DeleteConfirmed(int id)
    {
        var car = cars.FirstOrDefault(c => c.Id == id);

        if (car == null)
        {
            return HttpNotFound();
        }

        cars.Remove(car);
        return RedirectToAction("Index");
    }
}

4. 在 Views 文件夹下创建一个名为 Car 文件夹，并在其中创建以下视图文件：

- Index.cshtml：显示所有汽车信息。

@model List<Car>

<h2>Cars</h2>

<p>
    @Html.ActionLink("Add Car", "Create")
</p>

<table class="table">
    <tr>
        <th>Brand</th>
        <th>Model</th>
        <th>Year</th>
        <th>Price</th>
        <th></th>
    </tr>

    @foreach (var car in Model)
    {
        <tr>
            <td>@car.Brand</td>
            <td>@car.Model</td>
            <td>@car.Year</td>
            <td>@car.Price.ToString("C")</td>
            <td>
                @Html.ActionLink("Details", "Details", new { id = car.Id }) |
                @Html.ActionLink("Edit", "Edit", new { id = car.Id }) |
                @Html.ActionLink("Delete", "Delete", new { id = car.Id }, new { onclick = "return confirm('Are you sure you want to delete this car?')" })
            </td>
        </tr>
    }
</table>

- Details.cshtml：显示指定汽车信息。

@model Car

<h2>@Model.Brand @Model.Model</h2>

<dl class="dl-horizontal">
    <dt>Year</dt>
    <dd>@Model.Year</dd>
    <dt>Price</dt>
    <dd>@Model.Price.ToString("C")</dd>
</dl>

<p>
    @Html.ActionLink("Edit", "Edit", new { id = Model.Id }) |
    @Html.ActionLink("Back to List", "Index")
</p>

- Create.cshtml：添加汽车信息。

@model Car

<h2>Add Car</h2>

@using (Html.BeginForm())
{
    @Html.AntiForgeryToken()

    <div class="form-horizontal">
        <hr />
        @Html.ValidationSummary(true, "", new { @class = "text-danger" })

        <div class="form-group">
            @Html.LabelFor(model => model.Brand, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.Brand, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.Brand, "", new { @class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            @Html.LabelFor(model => model.Model, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.Model, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.Model, "", new { @class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            @Html.LabelFor(model => model.Year, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.Year, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.Year, "", new { @class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            @Html.LabelFor(model => model.Price, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.Price, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.Price, "", new { @class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            <div class="col-md-offset-2 col-md-10">
                <input type="submit" value="Save" class="btn btn-default" />
            </div>
        </div>
    </div>
}

<div>
    @Html.ActionLink("Back to List", "Index")
</div>

- Edit.cshtml：修改汽车信息。

@model Car

<h2>Edit Car</h2>

@using (Html.BeginForm())
{
    @Html.AntiForgeryToken()

    <div class="form-horizontal">
        <hr />
        @Html.ValidationSummary(true, "", new { @class = "text-danger" })

        @Html.HiddenFor(model => model.Id)

        <div class="form-group">
            @Html.LabelFor(model => model.Brand, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.Brand, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.Brand, "", new { @class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            @Html.LabelFor(model => model.Model, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.Model, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.Model, "", new { @class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            @Html.LabelFor(model => model.Year, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.Year, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.Year, "", new { @class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            @Html.LabelFor(model => model.Price, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.Price, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.Price, "", new { @class = "text-danger" })
            </div>
        </div>

        <div class="form-group">
            <div class="col-md-offset-2 col-md-10">
                <input type="submit" value="Save" class="btn btn-default" />
            </div>
        </div>
    </div>
}

<div>
    @Html.ActionLink("Back to List", "Index")
</div>

- Delete.cshtml：删除汽车信息。

@model Car

<h2>Delete Car</h2>

<h3>Are you sure you want to delete this car?</h3>

<dl class="dl-horizontal">
    <dt>Brand</dt>
    <dd>@Model.Brand</dd>
    <dt>Model</dt>
    <dd>@Model.Model</dd>
    <dt>Year</dt>
    <dd>@Model.Year</dd>
    <dt>Price</dt>
    <dd>@Model.Price.ToString("C")</dd>
</dl>

@using (Html.BeginForm())
{
    @Html.AntiForgeryToken()

    <div class="form-group">
        <div class="col-md-offset-2 col-md-10">
            <input type="submit" value="Delete" class="btn btn-default" />
        </div>
    </div>
}

<div>
    @Html.ActionLink("Back to List", "Index")
</div>

5. 运行项目，即可看到汽车管理系统的界面。