我想写一个强类型帮手 这将是这样的：

  Html.Lookup（X =＆GT; x.FooId）;
 

现在我有这样的：

 公共静态MvcHtmlString查询＆LT; T，TReturn＆GT;（这HtmlHelper的＆LT; T＆GT; HTML，Func键＆LT; T，TReturn＆GT;除权pression）
        {
             //获取字符串FooId在这里
        }
 

有人知道如何得到的？

 公共静态类防爆pressionsExtractor
{
    公共静态字符串查找＆LT; T，TProp＆GT;（这HtmlHelper的＆LT; T＆GT; HTML，防爆pression＆LT; Func键＆LT; T，TProp＆GT;＆GT;除权pression）
    {
        VAR memberEx pression = EX pression.Body为MemberEx pression;

        如果（memberEx pression == NULL）
            返回null;

        返回memberEx pression.Member.Name;
    }
}
 

您会然后调用它：

  VAR作为propName = Html.Lookup（X =＆GT; x.FooId）;
 

I'm trying to write a strongly typed helper which would be something like this:

Html.Lookup(x => x.FooId);

for now I have this:

public static MvcHtmlString Lookup<T,TReturn>(this HtmlHelper<T> html, Func<T, TReturn> expression)
        {
             // get string "FooId" here
        }

anybody knows how to get this ?

public static class ExpressionsExtractor
{
    public static string Lookup<T, TProp>(this HtmlHelper<T> html, Expression<Func<T, TProp>> expression)
    {
        var memberExpression = expression.Body as MemberExpression;

        if (memberExpression == null)
            return null;

        return memberExpression.Member.Name;
    }
}

You would then call it with:

var propName = Html.Lookup(x => x.FooId);