Question

我不知道如何实现这一目标。我想在视图中使用foreach循环以表格格式显示数据。此数据将来自linq查询，该查询使用3-4个表并选择要显示的不同字段。不知道如何返回这个，因为我得到一个匿名类型错误。

var info = from s in context.LennoxSurveyResponses
                       join customers in context.Customers on s.SurveyCode equals customers.SurveyCode
                       join lists in context.CustomerLists on customers.ListId equals lists.ListId
                       join dealer in context.Channels on lists.ChannelId equals dealer.ChannelId
                       where dealer.ChannelId == id
                       select new
                       {
                           ResponseId = s.ResponseId,
                           CustomerFirstName = customers.FirstName,
                           CustomerLastName = customers.LastName,
                           CustomerTestimonial = s.Question5Answer
                       };

我的模型必须声明什么才能传递给视图？

Answer 1

视图适用于视图模型，因此首先定义一个：

public class CustomerViewModel
{
    public int ResponseId { get; set; }
    public string CustomerFirstName { get; set; }
    public string CustomerLastName { get; set; }
    public string CustomerTestimonial { get; set; }
}

然后：

public ActionResult Foo(string id)
{
    var info = 
        from s in context.LennoxSurveyResponses
        join customers in context.Customers on s.SurveyCode equals customers.SurveyCode
        join lists in context.CustomerLists on customers.ListId equals lists.ListId
        join dealer in context.Channels on lists.ChannelId equals dealer.ChannelId
        where dealer.ChannelId == id
        select new CustomerViewModel
        {
            ResponseId = s.ResponseId,
            CustomerFirstName = customers.FirstName,
            CustomerLastName = customers.LastName,
            CustomerTestimonial = s.Question5Answer
        };
    return View(info);
}

最后将您的观点强烈输入：

@model IEnumerable<CustomerViewModel>

现在你可以 ~~loop~~ 使用这个视图模型的显示模板向用户展示信息：

@Html.DisplayForModel()

并在相应的显示模板（~/Views/Home/DisplayTemplates/CustomerViewModel.cshtml）内：

@model CustomerViewModel
<div>
    <span>First name: @Html.DisplayFor(x => x.CustomerFirstName)</span>
    <span>Last name: @Html.DisplayFor(x => x.CustomerLastName)</span>
    ...      
</div>

我如何使用此linq查询在MVC中使用foreach循环显示数据

1 个答案: