ASP.NET MVC RouteData和数组

我想定制的HTMLHelper应该是合适的。

 public static string ActionLinkWithList( this HtmlHelper helper, string text, string action, string controller, object routeData, object htmlAttributes )
 {
     var urlHelper = new UrlHelper( helper.ViewContext.RequestContext );


     string href = urlHelper.Action( action, controller );

     if (routeData != null)
     {
         RouteValueDictionary rv = new RouteValueDictionary( routeData );
         List<string> urlParameters = new List<string>();
         foreach (var key in rv.Keys)
         {
             object value = rv[key];
             if (value is IEnumerable && !(value is string))
             {
                 int i = 0;
                 foreach (object val in (IEnumerable)value)
                 {
                     urlParameters.Add( string.Format( "{0}[{2}]={1}", key, val, i ));
                     ++i;
                 }
             }
             else if (value != null)
             {
                 urlParameters.Add( string.Format( "{0}={1}", key, value ) );
             }
         }
         string paramString = string.Join( "&", urlParameters.ToArray() ); // ToArray not needed in 4.0
         if (!string.IsNullOrEmpty( paramString ))
         {
            href += "?" + paramString;
         }
     }

     TagBuilder builder = new TagBuilder( "a" );
     builder.Attributes.Add("href",href);
     builder.MergeAttributes( new RouteValueDictionary( htmlAttributes ) );
     builder.SetInnerText( text );
     return builder.ToString( TagRenderMode.Normal );
}

您可以在 routevalues 使用这样的数组索引:

RouteValueDictionary rv = new RouteValueDictionary();
rv.Add("test[0]", val1);
rv.Add("test[1]", val2);

这将导致包含 test=val1&test=val2

那会有帮助吗?

两种方法结合起来很好。

public static RouteValueDictionary FixListRouteDataValues(RouteValueDictionary routes)
{
    var newRv = new RouteValueDictionary();
    foreach (var key in routes.Keys)
    {
        object value = routes[key];
        if (value is IEnumerable && !(value is string))
        {
            int index = 0;
            foreach (string val in (IEnumerable)value)
            {
                newRv.Add(string.Format("{0}[{1}]", key, index), val);
                index++;
            }
        }
        else
        {
            newRv.Add(key, value);
        }
    }

    return newRv;
}

然后在任何需要包含IEnumerable的RouteValues的扩展方法中使用此方法。

可悲的是,MVC3也需要这种修井接缝。

有一个叫天秤座的 Unbinder ,可用于将复杂对象插入到路由/URL中。

工作原理如下:

using Unbound;

Unbinder u = new Unbinder();
string url = Url.RouteUrl("routeName", new RouteValueDictionary(u.Unbind(YourComplexObject)));

这将作为对 UrlHelper 只需提供一个可以放在任何地方的好的URL,而不是一个完整的A标记,它还将为正在使用的任何其他特定URL保留大多数其他路由值…为您提供最友好的特定URL(减去IEnumerable值),然后在末尾附加查询字符串值。

public static string ActionWithList(this UrlHelper helper, string action, object routeData)
{

    RouteValueDictionary rv = new RouteValueDictionary(routeData);

    var newRv = new RouteValueDictionary();
    var arrayRv = new RouteValueDictionary();
    foreach (var kvp in rv)
    {
        var nrv = newRv;
        var val = kvp.Value;
        if (val is IEnumerable && !(val is string))
        {
            nrv = arrayRv;
        }

        nrv.Add(kvp.Key, val);

    }


    string href = helper.Action(action, newRv);

    foreach (var kvp in arrayRv)
    {
        IEnumerable lst = kvp.Value as IEnumerable;
        var key = kvp.Key;
        foreach (var val in lst)
        {
            href = href.AddQueryString(key, val);
        }

    }
    return href;
}

public static string AddQueryString(this string url, string name, object value)
{
    url = url ?? "";

    char join = '?';
    if (url.Contains('?'))
        join = '&';

    return string.Concat(url, join, name, "=", HttpUtility.UrlEncode(value.ToString()));
}   

我不在我的工作站,但是像这样的事情怎么样:

<%= Html.ActionLink("click here", "DoMoreStuff", "MoreStuffController", new { stuff = (List<T>)ViewData["stuff"] }, null) %>

或键入:

<%= Html.ActionLink("click here", "DoMoreStuff", "MoreStuffController", new { stuff = (List<T>)ViewData.Model.Stuff }, null) %>