RestSharp - array as querystring parameter

Question

i can't pass an array (an int array) as query string parameter to RestSharp client

var client = new RestClient(baseUrl);
client.Authenticator = new HttpBasicAuthenticator(username, password);

var request = new RestRequest(_endpoint, Method.GET);
            request.AddHeader("cache-control", "no-cache");
            request.AddHeader("contenttype", "application/json; charset=utf-8");
            request.AddHeader("Accept", "text/html, application/xhtml+xml, image/jxr, */*");


//i tried with
request.AddParameter("messageIds", "[1,2,3]");
or
request.AddParameter("messageIds", new int[] {1,2,3} );
or
request.AddQueryParameter("messageIds", "[1,2,3]");
or
request.AddQueryParameter("messageIds", new int[] {1,2,3} );

i suppose the problem is related to the UrlEncoding of the parameters

in case i pass the values with "new int[] {1,2,3}" (both AddParameter and AddQueryParameter) the url is built in this way:

ResponseUri = {https://demo.xxxxxxxx.com:8181/ws/messages/zippedMessages?messageIds=System.Int32[]}

in case i pass the values as a string "[1,2,3]" (both AddParameter and AddQueryParameter) the url is built in this way:

ResponseUri = {https://demo.xxxxxxxx.com:8181/ws/messages/zippedMessages?messageIds=[1%2C2%2C3]}

instead a working url should it be:

ResponseUri = {https://demo.xxxxxxxx.com:8181/ws/messages/zippedMessages?messageIds=%5B1,2,3%5D}

or at least:

ResponseUri = {https://demo.xxxxxxxx.com:8181/ws/messages/zippedMessages?messageIds=[1,2,3]}

the "AddParameter" method encodes the comma but not the [ ] , should it be the opposite.

is there a way to change this behaviour? does exist something like a PreExecute event where to relpace characters? or some other workaround?

In the actual request it should be presented as messageIds=a&messageIds=b&messageIds=c. I've not used the RESTSharp client, but is it possible to simply add messageIds multiple times? — ProgrammingLlama
– ProgrammingLlama, Commented Apr 7, 2017 at 7:29
Possible duplicate of Passing list of int to Web API from RestSharp Client — ProgrammingLlama
– ProgrammingLlama, Commented Apr 7, 2017 at 7:35
John this produce an url like you wrote me and the API that i'm consuming is stupid enough to not accept parameters it this way. Unfortunately i can't change it. — pinale
– pinale, Commented Apr 7, 2017 at 9:25
Have they defined the format they expect arrays to be passed in? — ProgrammingLlama
– ProgrammingLlama, Commented Apr 7, 2017 at 9:26
trying these formats with postman the api works: demo.xxxxxxxx.com:8181/ws/messages/… demo.xxxxxxxx.com:8181/ws/messages/… — pinale
– pinale, Commented Apr 7, 2017 at 9:28

Bug Hunter Zoro · Accepted Answer · 2019-03-29 15:14:17Z

5

Am a little late for the party but the way this can also be achieved is by using LINQ and what I did in my case was

var request = new RestRequest("ServiceName", Method.GET);

var userIds = new List<int> { 123, 456};
     userIds.ForEach(x => request.AddParameter("userIds", x, ParameterType.GetOrPost));

The above code generates the URL which appends your integer list as a query string in your request

Your_Service_Name?userIds=123&userIds=456

hope this helps

answered Mar 29, 2019 at 15:14

Bug Hunter Zoro

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1 Comment

Daniel Georgiev Over a year ago

Even later to the party. First of all, thanks for your example, it works perfectly. I just want to mention that the `ParameterType.GetOrPost' can be omitted.

Jack Middleton · Accepted Answer · 2018-05-31 09:44:14Z

The way I achieved this was to use String.Join()

int[] messageIds = {1, 2, 3};
var request = new RestRequest(_endpoint, Method.GET);
var stringOfInts = String.Join(",", new List<int>(messageIds).ConvertAll(i => i.ToString()).ToArray());
request.AddQueryParameter("messageIds", stringOfInts);

This line var stringOfInts = String.Join(",", new List<int>(messageIds).ConvertAll(i => i.ToString()).ToArray()); converts your int array to a list. This allows us to the use a linq expression on the list to convert each integer in the list to a string. Once that is done, it converts the list back to an array so you can use string.Join() on it. The comma is a separator.

stringOfInts will be set to "1,2,3" which means the output of the entire code segment above (as a URL) will be {_endpoint}?messageIds=1,2,3

EDIT: Credit goes to the following post: int array to string

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