如何通过Regex从自定义Route构造函数中的url参数获取路径数据键？

Question

Basically, I need to get an array of route value keys from a route string. Regex is looking like the way, but I can't seem to get the regex down.

From "{controller}/{action}/{id}"

To a string[] with values, "controller", "action", "id"

Here's the closest I got Regex.Split(url, "/{(.*?)}/");

But I'm getting unusual results: "{controller}", "action", "{id}"

Answer 1

It's probably alot cheaper to avoid Regex. Try:

var myRoute = "{controller}/{action}/{id}";
string[] results = myRoute.Split(new[] { '{', '}', '/' }, StringSplitOptions.RemoveEmptyEntries);

Answer 2

Actually, you can call someContext.RouteData.Values.Keys.ToArray() , where someContext can be RequestContext , for example. Make sure that you import System.Linq namespace to get ToArray() extension method.

If you want to do it through an action you will need to do it through ControllerContext. For example,

public ActionResult Index()
{
    var routeDataKeys = ControllerContext.RouteData.Values.Keys.ToArray();
    var content = String.Empty;

    foreach (var key in routeDataKeys)
    {
        content += "   " + key;
    }
    return Content(content);
}

You will get all the keys that belong to the currently chosen Route without curly braces.

Answer 3

不需要正则表达式：

List<string> parts = str.Split('/').Select(p => p.Trim(new []{ '}', '{' })).ToList();