c# - 将 displayname 属性作为参数传递

Question

对于以下 ActionLink 调用:

@Html.ActionLink("Customer Number", "Search", new { Search = ViewBag.Search, q = ViewBag.q, sortOrder = ViewBag.CustomerNoSortParm, })

我正在尝试传递@model.CustomerNumber 的标签以生成“客户编号”文本，而不必显式传递它。参数是否有 @Html.LabelFor(model => model.CustomerNumber) 的等价物？

Answer 1

没有开箱即用的助手。

但是编写自定义的非常容易:

public static class HtmlExtensions
{
    public static string DisplayNameFor<TModel, TProperty>(
        this HtmlHelper<TModel> html, 
        Expression<Func<TModel, TProperty>> expression
    )
    {
        var htmlFieldName = ExpressionHelper.GetExpressionText(expression);
        var metadata = ModelMetadata.FromLambdaExpression(expression, html.ViewData);
        return (metadata.DisplayName ?? (metadata.PropertyName ?? htmlFieldName.Split(new[] { '.' }).Last()));
    }
}

然后使用它(在将您定义它的 namespace 引入范围之后):

@Html.ActionLink(
    "Customer Number", 
    "Search", 
    new { 
        Search = ViewBag.Search, 
        q = ViewBag.q, 
        sortOrder = ViewBag.CustomerNoSortParm, 
        customerNumberDescription = Html.DisplayNameFor(model => model.CustomerNumber)
    }
)