ASP.NET MVC 使用视图中的值填充 DropDownList

发布于 2024-08-31 11:51:58 字数 558 浏览 2 评论 0原文

在我的控制器中，我有这个：

ViewData["maskList"] = new SelectList(equipmentRepository.GetMasks(), "Id", "DisplayName");

然后我使用

<div each="var nfa in mfa.NasalFittingAssessment">
    ${Html.DropDownList("NasalMaskTypeId", ViewData["maskList"] as IEnumerable<System.Web.Mvc.SelectListItem>, new { class = "ddl" })}                
</div>

Note 将其绑定到我的视图，因为我正在使用 Spark 视图引擎，因此这个 DropDownList 通过循环呈现到页面。这意味着下拉列表的选定值将在循环的每次迭代中发生变化。

我无法解决的是如何根据当前呈现到屏幕的值传递我想要将 DropDownList 设置为的值。

原文

In my controller I have this:

ViewData["maskList"] = new SelectList(equipmentRepository.GetMasks(), "Id", "DisplayName");

and then I bind it to my view using

<div each="var nfa in mfa.NasalFittingAssessment">
    ${Html.DropDownList("NasalMaskTypeId", ViewData["maskList"] as IEnumerable<System.Web.Mvc.SelectListItem>, new { class = "ddl" })}                
</div>

Note that I'm using the spark view engine so this DropDownList is getting rendered to the page via a loop. This means that the selected value of the dropdown list will change on each iteration of the loop.

What I can't work out is how to pass in the value I want to set the DropDownList to based on the value that is currently being rendered to the screen.

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江南烟雨〆相思醉 2024-09-07 11:51:58

因此，经过一番尝试后，我解决了这个问题：

您要做的就是像这样在控制器中分配通用集合：

ViewData["maskList"] = equipmentRepository.GetMasks();

然后从视图中动态构建选择列表，如下所示：

<div each="var nfa in mfa.NasalFittingAssessment">
    ${Html.DropDownList("NasalFittingAssessment.NasalMaskType.Id", new SelectList(ViewData["maskList"] as IList<Equipment>, "Id", "DisplayName", nfa.NasalMaskType.Id), new { class = "ddl" })}                
</div>

So after a bit of playing around I worked it out:

What you want to do is just assign the generic collection in the controller like this:

ViewData["maskList"] = equipmentRepository.GetMasks();

and then construct the selectlist on the fly from within the view like this:

<div each="var nfa in mfa.NasalFittingAssessment">
    ${Html.DropDownList("NasalFittingAssessment.NasalMaskType.Id", new SelectList(ViewData["maskList"] as IList<Equipment>, "Id", "DisplayName", nfa.NasalMaskType.Id), new { class = "ddl" })}                
</div>

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