在MVC剃须刀中实现if else [英] Implementation of if else in MVC razor

问题描述

我是ASP.Net MVC的新手。对不起，如果我的问题似乎很愚蠢。但我不确定如何在视图和控制器之间进行操作。

我有一个价格的产品清单，并有静态下拉，以根据所选的折扣计划实施折扣策略。



这是我的产品页面

I am pretty new to ASP.Net MVC. Sorry if my question seems stupid. but I am not sure how to get things to work between views and controllers.
I have a product list with the price and have static drop down to implement discount strategies based on discount plan selected.

Here is my product page

<pre><table class="table">
    <tr>
        <th>
            @Html.DisplayNameFor(model => model.ProductName)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.ProductPrice)
        </th>
        <th></th>
    </tr>

@foreach (var item in Model) {
    <tr>
        <td>
            @Html.DisplayFor(modelItem => item.ProductName)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.ProductPrice)
        </td>
       
            <td>

                @Html.DropDownList("Status", new List<SelectListItem>

                 {
                    new SelectListItem{ Text="Student Discount", Value = "1" },
                    new SelectListItem{ Text="Loyalty Discount", Value = "0" }
                 })
                
            </td>

        <

这里是m y添加产品控制器

here is my Add product Controller

public ActionResult Index()
       {
           Customers customer = new Customers();

           return View(db.Products.ToList());
       }

我尝试过：



我想根据下拉菜单中的选项显示页面上的折扣价。



我正在实现这个Windows窗体应用程序我的MVC应用程序中的stretegy。

但我不知道如何在视图和控制器中处理它。



任何提示都将不胜感激。

这里是来自windows表单应用程序的代码

What I have tried:

I want to show discounted price on the page based on the selection from the dropdown.

I am implementing this windows form application stretegy in my MVC application .
But i am not sure how to handle it in views and controller.

Any hints would be appreciated.
here is the code from windows form applicaion

 private void btnApplyDiscounts_Click(object sender, EventArgs e)
        {
            Customer customer = new Customer();
            if (chkLoyalty.Checked && chkStudent.Checked)
            {
                customer.SetDiscountStrategy(new LoyalStudentDiscount());
            }
            else if (chkLoyalty.Checked)
            {
                customer.SetDiscountStrategy(new LoyaltyDiscount());
            }
            else if (chkStudent.Checked)
            {
                customer.SetDiscountStrategy(new StudentDiscount());
            }
            else
            {
                customer.SetDiscountStrategy(new NoDiscount());
            }

            decimal price = customer.ApplyDiscount(numTotalSale.Value);
            lblFinalPrice.Text = price.ToString("C");
        }
    }
}

推荐答案

Razor是服务器端的html渲染引擎。因此，在将页面发送到用户的Web浏览器之前。



如果您想在客户端进行更改，在浏览器中加载页面后，您将需要使用javascript / jquery / etc ...

Razor is a server-side html rendering engine. So before the page is sent to the user's web browser.

If you want to make changes client-side, after the page is loaded in the browser, then you will need to use javascript/jquery/etc...

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