如何将数据传递到MVC asp.net的看法？

问题描述

让我先问一个问题。

在哪里是正确的地方调用加载值列表功能是在视图上显示？

Where is the correct place to call a function that load a list of values to be display on a view?

我创建这样一个控制器

public ActionResult Create()
{
    SeaModel newSea = new SeaModel();

    return View("Season/CreateSea", newSea);
}

//I not quite sure if this should go here or in another place
partial class seaDataContext
{
    public List<string> getSeaSettings()
    {
        var seaSettings = from p in settings
                          where p.setting == "periods"
                          select p.value;

        return seaSettings.ToList<string>();
    }
}

该模型是像

public class SeaModel
{
    [Required(ErrorMessage="*")]
    [Display(Name = "Period Name")]
    public string periods { get; set; }
}

其中创建像

  @using (Html.BeginForm()) {
        @Html.ValidationSummary(true, "Please correct the following errors.")

        <fieldset>
            <legend>Fields</legend>

            <div class="editor-label">
                @Html.LabelFor(model => model.periods)
            </div>
            <div class="editor-field">
                @Html.Select(model => model.periods, ****My doubt comes here****)
                @Html.ValidationMessageFor(model => model.periods)
            </div>

            <p>
                <input type="submit" value="Create" />
            </p>
        </fieldset>

    }

那么，如何以及在哪里我通过getSeaSettings（）到视图的回报？

so, How and where do I pass the return of getSeaSettings() to the view?

感谢

推荐答案

最好的做法是做一个选择列表中的模型此下拉列表。

best practice is to make a Selectlist in your Model for this dropdown.

不过，您还可以使用更简单的选择：使用的ViewData

however you also can use the more easy option: using ViewData

 public ActionResult Create()
 {
     SeaModel newSea = new SeaModel();

     ViewData["myDropDown"] = new SelectList(listOfObjects, "valueOfTheObjectLikeID", "NameYouWantToShowInDropdown");

     return View("Season/CreateSea", newSea);
 }

然后

@Html.Select(model => model.periods, ViewData["myDropDown"] as SelectList)

不要在你的[HttpPost]法忘了还填补了可视数据，如果找你验证失败，这样的下拉可以重建。

dont forget in your [HttpPost] method to also fill in the viewdata if you'r validation fails, so the dropdown can be rebuilt.

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