ASP。NET MVC—将数组对象作为Html.ActionLink(…)中的路由值进行传递

I have a method that returns an array (string[]) and I'm trying to pass this array of strings into an Action Link so that it will create a query string similar to:

我有一个方法可以返回一个数组(string[])，我正在尝试将这个字符串数组传递给一个动作链接，这样它就会创建一个类似于:

/Controller/Action?str=val1&str=val2&str=val3...etc

But when I pass new { str = GetStringArray() } I get the following url:

但是当我传递新的{str = GetStringArray()}时，我得到以下url:

/Controller/Action?str=System.String%5B%5D

So basically it's taking my string[] and running .ToString() on it to get the value.

基本上它取我的字符串[]并在上面运行。tostring()来获取值。

Any ideas? Thanks!

什么好主意吗?谢谢!

6 个解决方案

#1

Try creating a RouteValueDictionary holding your values. You'll have to give each entry a different key.

尝试创建一个包含您的值的RouteValueDictionary。你必须给每个条目一个不同的键。

<%  var rv = new RouteValueDictionary();
    var strings = GetStringArray();
    for (int i = 0; i < strings.Length; ++i)
    {
        rv["str[" + i + "]"] = strings[i];
    }
 %>

<%= Html.ActionLink( "Link", "Action", "Controller", rv, null ) %>

will give you a link like

会给你一个链接吗

<a href='/Controller/Action?str=val0&str=val1&...'>Link</a>

EDIT: MVC2 changed the ValueProvider interface to make my original answer obsolete. You should use a model with an array of strings as a property.

编辑:MVC2修改了ValueProvider接口，使我的原始答案作废。您应该使用带有字符串数组的模型作为属性。

public class Model
{
    public string Str[] { get; set; }
}

Then the model binder will populate your model with the values that you pass in the URL.

然后模型绑定器将用您在URL中传递的值填充您的模型。

public ActionResult Action( Model model )
{
    var str0 = model.Str[0];
}

#2

This really annoyed me so with inspiration from Scott Hanselman I wrote the following (fluent) extension method:

这真的让我很恼火，所以从Scott Hanselman的启发，我写了以下(流畅的)扩展方法:

public static RedirectToRouteResult WithRouteValue(
    this RedirectToRouteResult result, 
    string key, 
    object value)
{
    if (value == null)
        throw new ArgumentException("value cannot be null");

    result.RouteValues.Add(key, value);

    return result;
}

public static RedirectToRouteResult WithRouteValue<T>(
    this RedirectToRouteResult result, 
    string key, 
    IEnumerable<T> values)
{
    if (result.RouteValues.Keys.Any(k => k.StartsWith(key + "[")))
        throw new ArgumentException("Key already exists in collection");

    if (values == null)
        throw new ArgumentNullException("values cannot be null");

    var valuesList = values.ToList();

    for (int i = 0; i < valuesList.Count; i++)
    {
        result.RouteValues.Add(String.Format("{0}[{1}]", key, i), valuesList[i]);
    }

    return result;
}

Call like so:

像这样:

return this.RedirectToAction("Index", "Home")
           .WithRouteValue("id", 1)
           .WithRouteValue("list", new[] { 1, 2, 3 });

#3

Another solution that just came to my mind:

我想到的另一个解决办法是:

string url = "/Controller/Action?iVal=5&str=" + string.Join("&str=", strArray);

This is dirty and you should test it before using it, but it should work nevertheless. Hope this helps.

这是脏的，您应该在使用它之前对它进行测试，但是它仍然可以工作。希望这个有帮助。

#4

There is a library called Unbinder, which you can use to insert complex objects into routes/urls.

有一个名为Unbinder的库，您可以使用它将复杂的对象插入到路由/url中。

It works like this:

是这样的:

using Unbound;

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

#5

This is a HelperExtension solving array and IEnumerable properties troubles :

这是一个HelperExtension解决数组和IEnumerable属性问题:

public static class AjaxHelperExtensions
{
    public static MvcHtmlString ActionLinkWithCollectionModel(this AjaxHelper ajaxHelper, string linkText, string actionName, object model, AjaxOptions ajaxOptions, IDictionary<string, object> htmlAttributes)
    {
        var rv = new RouteValueDictionary();

        foreach (var property in model.GetType().GetProperties())
        {
            if (typeof(ICollection).IsAssignableFrom(property.PropertyType))
            {
                var s = ((IEnumerable<object>)property.GetValue(model));
                if (s != null && s.Any())
                {
                    var values = s.Select(p => p.ToString()).Where(p => !string.IsNullOrEmpty(p)).ToList();
                    for (var i = 0; i < values.Count(); i++)
                        rv.Add(string.Concat(property.Name, "[", i, "]"), values[i]);
                }
            }
            else
            {
                var value = property.GetGetMethod().Invoke(model, null) == null ? "" : property.GetGetMethod().Invoke(model, null).ToString();
                if (!string.IsNullOrEmpty(value))
                    rv.Add(property.Name, value);
            }
        }
        return System.Web.Mvc.Ajax.AjaxExtensions.ActionLink(ajaxHelper, linkText, actionName, rv, ajaxOptions, htmlAttributes);
    }
}

#6

-6

I'd use POST for an array. Aside from being ugly and an abuse of GET, you risk running out of URL space (believe it or not).

我用POST作为数组。除了丑陋和滥用GET之外，您还可能耗尽URL空间(信不信由您)。

Assuming a 2000 byte limit. The query string overhead (&str=) reduces you to ~300 bytes of actual data (assuming the rest of the url is 0 bytes).

假设有2000字节的限制。查询字符串开销(&str=)将实际数据减少到大约300字节(假设url的其余部分为0字节)。

#1