Working with Web API

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Hi All,

I am a newbie to working with Web Api and I am currently working with the Docusign web Api.
The webApi here requires to send the parameters as json or XML and I want to use Json here.
I am using HttpClient object for passing the credentials and calling the GetAsync() method of the HttpClient object the web APi.
The result of this call is processed using 'HttpResponseMessage'.

Now I want to call post and put methods.
So I will be using the the PostAsJsonAsync() and PutAsJsonAsync() functions.

I have created a Dictionary<string,>() object and I am adding the parameters and its values to it.
Then I am using,
string Jsonstring= JsonConvert.SerializeObject(DictionaryObject);
This gives me the Json as expected.

Now since I need to pass the json parameters along with the function calls.
Can anyone help me know how to pass the parameter.

Thanks in advance.

Posted 28-May-13 21:00pm

shivprasads

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tumbledDown2earth · Answer 1 · 2013-05-28T21:35:00

Solution 1

Use

PostAsJsonAsync(requestUri, DictionaryObject)

Posted 28-May-13 21:35pm

tumbledDown2earth

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shivprasads 29-May-13 6:49am

Ohh!
I was just wondering if I did it wrongly, and yes I did it the same way! Thats right :)
Thanks a lot for the reply.

But now I am getting Content Type specified not supported error. :(
although I have specified the
httpclient1.DefaultRequestHeaders.Add("ContentType", "application/json;");

tumbledDown2earth 29-May-13 7:35am

Can you post the json string of your sample object. Might help to resolve

shivprasads 29-May-13 8:32am

below is the json string
{"currentPassword":"abcd123","email":"abc@example.com","newPassword":"987qwe"}

there is also one optional field that is not passed here.
or does that also needs to be passed as empty value?

tumbledDown2earth 29-May-13 12:22pm

httpclient1.DefaultRequestHeaders.Add("Content-Type", "application/json;");

changed "ContentType" => "Content-Type"

shivprasads 30-May-13 2:22am

thanks for the reply.

well that is something I already tried but it gives me an error at runtime that read:
"Misused header name. Make sure request headers are used with HttpRequestMessage, response headers with HttpResponseMessage, and content headers with HttpContent objects."

Alteast "ContentTpe" was being accepted by DefaultRequestHeaders.Add() so I thought it may be more proper way of doing that.

tumbledDown2earth 30-May-13 3:08am

HttpClient c = new HttpClient();
c.BaseAddress = new Uri("http://example.com/");
c.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
HttpRequestMessage req = new HttpRequestMessage(HttpMethod.Post, "relativeAddress");
req.Content = new StringContent("{\"name\":\"John Doe\",\"age\":33}", Encoding.UTF8, "application/json");