How do I convert a querystring to a json string?

Question

Using server-side C#, how can I convert a querystring to a JSON string of keys and values? For example, I want to convert

"ID=951357852456&FNAME=Jaime&LNAME=Lopez"

to

{ "ID":"951357852456" , "FNAME":"Jaime" , "LNAME":"Lopez" }

I know how to manually parse and format but, before starting down that road, I thought I'd ask since there might be a library that does it better. Thanks!

L.B · Accepted Answer · 2013-06-25T19:33:52.323

31

This gives the exactly same json you want

var dict = HttpUtility.ParseQueryString("ID=951357852456&FNAME=Jaime&LNAME=Lopez");
var json = new JavaScriptSerializer().Serialize(
                    dict.AllKeys.ToDictionary(k => k, k => dict[k])
           );

edited Jun 25 '13 at 19:33

answered Sep 14 '12 at 17:11

L.B

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How do you handle arrays? – Arman Bimatov Mar 31 '14 at 04:11
The resultset of your answer does not match the OP's requested resultset. – Rafael Herscovici Nov 05 '14 at 15:14
@Dementic It exactly produces the json string OP wants... (BTW: See the green tick at the left :) ) – L.B Nov 05 '14 at 17:29
1

Accepted answer dosent mean that it does exactly what was asked. the result of your code would be something like `{ "key": "keyName", "val": "value"}` while the OP asked for `{ "keyName": " value" }` – Rafael Herscovici Nov 06 '14 at 08:10
3

@Dementic `the result of your code would be ......`, **NO**, What is so hard to understand, I just rerun above code and got `{"ID":"951357852456","FNAME":"Jaime","LNAME":"Lopez"}`. Next time please make sure if you don't want to downvote a correct answer. – L.B Nov 06 '14 at 17:41
I have to agree with @L.B - I ran the code and it works as expected – Adam Davis Oct 12 '18 at 14:13
1

@L.B This answer is not precise, it will not work if in the query string there is an array. Maybe it's accepptable but is better if the answer specify this limitation – Skary Mar 06 '22 at 16:27

score 7 · Answer 2 · answered Sep 29 '20 at 09:50

7

It also possible to use

var collection = HttpUtility.ParseQueryString(query);
Newtonsoft.Json.JsonConvert.SerializeObject(collection.AllKeys.ToDictionary(y => y, y => collection[y]));

answered Sep 29 '20 at 09:50

Bastien Vandamme

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score -3 · Answer 3 · answered Sep 14 '12 at 17:07

-3

You can use jQuery to do this: jQuery.Param.

answered Sep 14 '12 at 17:07

JSK NS

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OP is asking for a server side solution. – Justin Self Sep 14 '12 at 17:11

How do I convert a querystring to a json string?

3 Answers3

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