构建HiddenFor用于表达

Question

我正在尝试创建一个我可以这样调用的扩展

@ Html.HiddenForSuperComplex（x =＆gt; x.Abc）

我希望它以递归方式遍历该模型/表达式的属性，并为该模型/表达式中的所有字段创建Hiddens，以便保留模型。

我遇到了以下一行的障碍：

str = htmlHelper.HiddenForComplex<TProperty,mt>(a.Expression);

但我开始认为我走错了路......

    public static MvcHtmlString HiddenForSuperComplex<TModel, TProperty>(this HtmlHelper<TModel> htmlHelper, Expression<Func<TModel, TProperty>> expression)
    {
        TProperty t = htmlHelper.GetValue(expression);
        Type type = typeof(TProperty);
        MvcHtmlString retVal = new MvcHtmlString("");


        var newExpression = expression.Body as NewExpression;
        TModel model = htmlHelper.ViewData.Model;

        foreach (MemberExpression a in newExpression.Arguments)
        {
            Type mt = a.Member.GetType();
            MvcHtmlString str;
            if (ModelUtil.IsSimpleEnough(mt))
            {
                string value = Convert.ToString(GetPropertyValue<TModel>(model, a));
                str = htmlHelper.Hidden(value);
            }
            else
            {
                str = htmlHelper.HiddenForComplex<TProperty,mt>(a.Expression);   //DOES NOT COMPILE
            }
        }
        return retVal;
    }

    private static object GetPropertyValue<T>(T instance, MemberExpression me)
    {
        object target;

        if (me.Expression.NodeType == ExpressionType.Parameter)
        {
            // If the current MemberExpression is at the root object, set that as the target.            
            target = instance;
        }
        else
        {
            target = GetPropertyValue<T>(instance, me.Expression as MemberExpression);
        }

        // Return the value from current MemberExpression against the current target
        return target.GetType().GetProperty(me.Member.Name).GetValue(target, null);
    }

    public static MvcHtmlString HiddenForComplex<TModel, TProperty>(this HtmlHelper<TModel> htmlHelper, Expression<Func<TModel, TProperty>> expression)
    {
        TProperty t = htmlHelper.GetValue(expression);
        Type type = typeof(TProperty);
        MvcHtmlString retVal = new MvcHtmlString("");

        foreach (PropertyInfo info in t.GetType().GetProperties())
        {
            string value = info.GetValue(t).ToString();
            //string value = (string)type.GetProperty(info.ToString()).GetValue(t, null);
            MvcHtmlString str = htmlHelper.Hidden(value);
            retVal = Concat(retVal, str);

        }
        return retVal;
    }