asp.net-mvc - 带有资源文件的模型的单选按钮枚举助手

Question

问题:

需要绑定(bind)一个强类型模型，该模型具有一个枚举属性 Gender。我也喜欢显示资源文件中的显示文本。

我的模型是

public enum GenderViewModel
{
  [Display(Name = "Male", ResourceType = typeof(Resources.Global), Order = 0)]
  Male,
  [Display(Name = "Female", ResourceType = typeof(Resources.Global), Order = 1)]
  Female

}

最初，我尝试关注 http://romikoderbynew.com/2012/02/23/asp-net-mvc-rendering-enum-dropdownlists-radio-buttons-and-listboxes/

但它有点复杂，我无法随心所欲地更正我的 HTML。

然后我从stackoverflow看了看简单易行的实现，pass enum to html.radiobuttonfor MVC3

并在 cshtml 中使用了一个 HtmlHelper，如下所示

@Html.RadioButtonForEnum(m => m.Gender)

生成的 HTML

<label for="_Gender_Male">
 <input type="radio" value="Male" name="Gender" id="_Gender_Male" 
 data-val-required="Gender is required" data-val="true" checked="checked">
 <span class="radiotext">Male</span>
</label>

<label for="_Gender_Female">
<input type="radio" value="Female" name="Gender" id="_Gender_Female">
<span class="radiotext">Female</span></label>

It really simple and works well for me. But i am not getting values from Resource files. My application is multilingual and I use a Global Resource file for different language support.

问题:

Male 显示应为 Man，Female 显示应为 Kvinna 应该来自资源文件，因为我当前的文化是 sv-se

任何人都可以帮助/提供一个简单的解决方案，它可以很好地控制 HTML 吗？

Answer 1

您所要做的就是适应 my original helper以便它考虑到 DisplayAttribute:

public static class HtmlExtensions
{
    public static MvcHtmlString RadioButtonForEnum<TModel, TProperty>(
        this HtmlHelper<TModel> htmlHelper,
        Expression<Func<TModel, TProperty>> expression
    )
    {
        var metaData = ModelMetadata.FromLambdaExpression(expression, htmlHelper.ViewData);
        if (!metaData.ModelType.IsEnum)
        {
            throw new ArgumentException("This helper is intended to be used with enum types");
        }

        var names = Enum.GetNames(metaData.ModelType);
        var sb = new StringBuilder();

        var fields = metaData.ModelType.GetFields(
            BindingFlags.Static | BindingFlags.GetField | BindingFlags.Public
        );

        foreach (var name in names)
        {
            var id = string.Format(
                "{0}_{1}_{2}",
                htmlHelper.ViewData.TemplateInfo.HtmlFieldPrefix,
                metaData.PropertyName,
                name
            );
            var radio = htmlHelper.RadioButtonFor(expression, name, new { id = id }).ToHtmlString();
            var field = fields.Single(f => f.Name == name);
            var label = name;
            var display = field
                .GetCustomAttributes(typeof(DisplayAttribute), false)
                .OfType<DisplayAttribute>()
                .FirstOrDefault();
            if (display != null)
            {
                label = display.GetName();
            }

            sb.AppendFormat(
                "<label for=\"{0}\">{1}</label> {2}",
                id,
                HttpUtility.HtmlEncode(label),
                radio
            );
        }
        return MvcHtmlString.Create(sb.ToString());
    }
}

现在，如果您用 DisplayAttribute 装饰了一些枚举值，这些值将来自资源文件。