ASP.NET MVC parse URL query part

Question

I want something to turn ?a=5&b=8 part of a URL into a dictionary { a:5, b:8 }.

Is there such method in .net or am I on my own?

I need to parse query part so that I can implement my own URL decoding. The problem is that Firefox uses different encoding (UTF8 or ISO-8859-1) depending on the used alphabet.

Example:

Firefox encodes as following:

-                                          v   v
http://localhost:8041/Reforge.aspx?name=ArcânisГ 
Firefox turns into  
http://localhost:8041/Reforge.aspx?name=Arc%C3%A2nis%D0%93`

Notice that UTF8 encoding is used for both non-ASCII characters.

-                                          v
http://localhost:8041/Reforge.aspx?name=Arcâ
Firefox turns into
http://localhost:8041/Reforge.aspx?name=Arc%E2

Notice that ISO-8859-1 (Latin-1) encoding is used for the non-ASCII character.

Here is a related question: ASP.NET MVC does not understand mixed url encoding (UTF-8/Latin-1)

Marco Staffoli · Accepted Answer · 2010-11-13 21:23:08Z

2

Request.QueryString is a NameValueCollection that is like a dictionary.

It can contain multiple values for the same key.

If "?a=5&b=8" not come from querystring you can use HttpUtility.ParseQueryString method to get a NameValueCollection

If you want a true dictionary:

var d = new Dictionary<String,Object>();
this.Request.QueryString.CopyTo(d);

answered Nov 13, 2010 at 21:23

Marco Staffoli

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1 Comment

THX-1138 Over a year ago

The problem with Request.QueryString is that it also unescapes values, it is unescaping that I need to handle. Details: firefox can use utf-8 OR latin-1 to escape characters, but ASP.Net MVC uses one or the other all the time.

nerraga · Accepted Answer · 2010-11-14 03:03:25Z

1

Maybe a custom modelbinder to handle dictionaries? It seems like relying on the querystring, while perfectly valid, goes against the spirit of the framework. It also may make testing your action a little more difficult.

My first thought was that this was already handled by the default modelbinder facilites, but this doesn't appear to be the case. That said, I haven't tried it but this is where I'd start:

An Intuitive Dictionary Model Binder for ASPnet MVC

answered Nov 14, 2010 at 3:03

nerraga

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