.Net MVC订单后台管理系统源码编码过程（2）

public ActionResult Index()
{
    using (OrdersDBEntities db = new OrdersDBEntities())
    {
        List<OrderInfo> list = db.OrderInfo.OrderBy(o => o.OrderState).ToList();
        ViewBag.list = list;
        return View();
    }
}
初始化视图——Index.cshtml
@{
    ViewBag.Title = "Index";
}
<h2 align="center">简易订单管理系统</h2>
<hr />
<a href="~/Order/AddOrderPage">添加订单</a>
<table class="table table-bordered table-hover">
    <tr>
        <th>订单编号</th>
        <th>下单人</th>
        <th>订单日期</th>
        <th>订单状态</th>
        <th>操作</th>
    </tr>
    @foreach (var item in ViewBag.list)
    {
        <tr>
            <td>@item.OrderID</td>
            <td>@item.UserName</td>
            <td>@item.OrderDate</td>
            @if (item.OrderState == 0)
            {
                <td style="background-color:red">未发货</td>
            }
            else
            {
                <td>已发货</td>
            }
            <td>
                @if (item.OrderState == 0)
                {
                    <a href="~/Order/UpdateById?id=@item.OrderID">发货</a>
                }
            </td>
        </tr>
    }
</table>

public ActionResult AddOrderPage() {
    return View();
}

@{
    ViewBag.Title = "AddOrderPage";
}
<h2>添加订单</h2>
<hr/>
<form action="~/Order/AddOrder">
    <p>
        下单人:<input type="text" name="UserName" required/>
    </p>
    <p>
        订单日期<input type="date" name="OrderDate" required/>
    </p>
    <p>
        <input type="submit" value="提交"/>
    </p>
</form>

public ActionResult AddOrder(string UserName, DateTime OrderDate)
{
    using (OrdersDBEntities db = new OrdersDBEntities())
    {
        OrderInfo info = new OrderInfo();
        info.OrderID = 0;
        info.UserName = UserName;
        info.OrderDate = OrderDate;
        info.OrderState = 0;
        db.OrderInfo.Add(info);
        //一定要保存
        db.SaveChanges();
        return Redirect("~/Order/Index");
    }
}

public ActionResult UpdateById(int id) {
    using (OrdersDBEntities db = new OrdersDBEntities())
    {
        OrderInfo orderInfo = db.OrderInfo.Where(o => o.OrderID == id).FirstOrDefault();
        orderInfo.OrderState = 1;
        //保存
        db.SaveChanges();
        return Redirect("~/Order/Index");
    }

<a href="~/Order/UpdateById?id=@item.OrderID" onclick="return confirm('是否修改此行?')">发货</a>