填补选择列表与一个for循环 [英] Filling in the SelectList with a for loop

问题描述

好吧，我的下拉用来进行像这样：

Ok, my drop down used to be made like so:

<select id="Level" onchange="showChoice(this.value);">
     <option id="0" value="0">Pick a Level</option>
     @for (int i =1; i <= Model.ExamplesCount; i++ )
     {
         <option id="@i" value="@i">Level @i</option>
      }
</select>

由于Exam​​plesCount数每用户改变。但我需要使用 Html.ValidationMessageFor（）的事情，我不能得到这个工作。

because the ExamplesCount number changes per user. But I need to use the Html.ValidationMessageFor() thing, which I can't get to work with this.

我需要两个解决方案之一。

I need one of two solutions.

1. 我可以 Html.ValidationMessageFor（）此工作选择标记？

1. Can I make Html.ValidationMessageFor() work with this select tag?

，或者如果没有，

2，可我用 Html.DropDownListFor（）但有类似的for循环填充它吗？

2.Can I use Html.DropDownListFor() but fill it in with a similar for loop?

例如，

@Html.DropDownListFor(
    m => m.Level, 
    new SelectList(
        new List<Object> {
             new {value = 0, text ="Pick a Level"},
             new { value = 1, text = "Level 1"},
             new { value = 2, text = "Level 2" },
             new { value = 3, text = "Level 3" },
             new { value = 4, text = "Level 4" },
             new { value = 5, text = "Level 5" } 
        },
     "value", "text", null))
 @Html.ValidationMessageFor(model => model.Level)

以上code ++工程，但如果我硬编码的所有选择列表的价值观，我想有一个for循环，做对我来说。

The above code works, but where I am hard coding all the SelectList values, I'd like to have an for loop that does it for me.

推荐答案

有关创建模型中的对象，将内容的所有你想要的，然后传递到您的视图中的项目是什么？例如：

What about creating a object in your model that will content all the items you want an then pass that to your view? Example:

在你的模型。

public class Model{
     ...other properties
    public List<ListItemSource> myLevels { get; set; }
    [Required(ErrorMessage = @"*Required")]
    public string Level { get; set; }
}

在你的控制器：

public ActionResult YourAction(Model myModel)
    {
        var myModel = new Model
        {
            myLevels =methodToGetLevels()                
        };

        return view(myModel);
    }

在您查看：

   @Html.DropDownListFor(x => x.Level,
                         new SelectList(Model.myLevels, "Value", "Text"))

    @Html.ValidationMessageFor(model => model.Level)

在哪里x.Level将举行选定值和Model.myLevels是水平的集合。
我希望这有助于解决您的问题。

Where x.Level will hold the selected value and Model.myLevels is the collection of levels. I hope this help to solve your problem.

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