从 MVC 5.1 EnumDropDownListFor 中排除/删除值 [英] Exclude/Remove Value from MVC 5.1 EnumDropDownListFor

问题描述

我有一个用于用户管理页面的枚举列表.我在 MVC 5.1 中使用新的 HtmlHelper，它允许我为枚举值创建下拉列表.我现在需要从列表中删除 Pending 值，这个值只能以编程方式设置，永远不应由用户设置.

I have a list of enums that I am using for a user management page. I'm using the new HtmlHelper in MVC 5.1 that allows me to create a dropdown list for Enum values. I now have a need to remove the Pending value from the list, this value will only ever be set programatically and should never be set by the user.

枚举:

public enum UserStatus
{
    Pending = 0,
    Limited = 1,
    Active = 2
}

查看:

@Html.EnumDropDownListFor(model => model.Status)

无论如何，是否可以覆盖当前控件，或者编写一个自定义 HtmlHelper 以允许我指定一个枚举或要从结果列表中排除的枚举?或者你会建议我在客户端用 jQuery 做一些事情，以便在下拉列表生成后从下拉列表中删除它?

Is there anyway, either overriding the current control, or writing a custom HtmlHelper that would allow me to specify an enum, or enums to exclude from the resulting list? Or would you suggest I do something client side with jQuery to remove the value from the dropdown list once it has been generated?

谢谢！

推荐答案

您可以构建一个下拉列表:

You could construct a drop down list:

@{ // you can put the following in a back-end method and pass through ViewBag
   var selectList = Enum.GetValues(typeof(UserStatus))
                        .Cast<UserStatus>()
                        .Where(e => e != UserStatus.Pending)
                        .Select(e => new SelectListItem 
                            { 
                                Value = ((int)e).ToString(),
                                Text = e.ToString()
                            });
}
@Html.DropDownListFor(m => m.Status, selectList)

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