如何根据需要在MVC3中设置下拉列表

MVC的新手，希望这会非常简单。我有一个HTML下拉列表，我希望根据需要在联系人表单上设置，但是当我应用数据注释时，我无法按照回复的要求将它启动。默认值是 “”如何根据需要在MVC3中设置下拉列表

这里是我的HTML片段：

<div class="editor-field"> 
    <select name="ContactReason" size="1" class="textBox"> 
     <option value=""></option> 
     <option value="I have a question about this website">I have a question about this website</option> 
     <option value="My account is locked">My account is locked</option> 
     <option value="I am experiencing problems with the website">I am experiencing problems with the website</option> 
    </select> 
    @Html.ValidationMessageFor(m => m.ContactReason) 
</div>

下面是我的注解我的C＃代码。我已经尝试设置必要的属性，甚至范围属性，但似乎都没有办法。

[Required(ErrorMessage = "Your reason for contacting is required.")] 
[Range(2, 100, 
ErrorMessage = "Your reason for contacting is required.")] 
public virtual string ContactReason { get; set; }

感谢您的指导。

旧货

来源

2012-03-29 Flea

我发现下面的网站有所帮助：http://codeoverload.wordpress.com/2011/05/22/dropdown-lists-in-mvc-3/

我采取了以下和它的工作很适合我：

型号：

public List<SelectListItem> ContactReasons { get; set; } 

[Required(ErrorMessage = "Your reason for contacting is required.")] 
public virtual string ContactReason { get; set; }

控制器：

public ActionResult Index() 
{ 
    var Model = new ContactForm(); 
    Model.ContactReasons = this.GetContactReasons(); 
    return View(Model); 
} 

private List<SelectListItem> GetContactReasons() 
{ 
    List<SelectListItem> items = new List<SelectListItem>(); 
    items.Add(new SelectListItem { Text = "", Value = "" }); 
    items.Add(new SelectListItem { Text = "I have a question about this website", Value = "I have a question about this website" }); 
    items.Add(new SelectListItem { Text = "I am experiencing problems with the website", Value = "I am experiencing problems with the website" }); 

    return items; 
}

查看：

<div class="editor-label"> 
    @Html.Label("I am contacting because:") 
</div><br /> 
<div class="editor-field"> 
    @Html.DropDownListFor(m => m.ContactReason, Model.ContactReasons) 
    @Html.ValidationMessageFor(m => m.ContactReason) 
</div>

来源

2012-03-30 15:11:02 Flea

使用在@ Html.DropDownListFor的optionLabel属性（）

让它 “选择一个” 或 “”（空字符串）

验证在你的控制器标志“选择一”或‘’（空字符串）

做相同的JQuery

来源

2012-03-29 14:38:54 Har

如何根据需要在MVC3中设置下拉列表

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