Get data from WebApi in c#

Question

I have webapi and her method:

[HttpPost, HttpGet]
[ActionName("GetData")]
public MyData GetData([FromUri] MyData data)
{
  return datamanager.get(data);
}

How do I invoke this method? I.e. how do I send data parameter through query part of URL?

To invoke get method which takes no parameters I use following code:

public static async Task<myClassl> GetData()
{
    HttpClient client = new HttpClient();
    client.BaseAddress = new Uri("http://sasa.com");
    HttpResponseMessage response = await client.GetAsync("api/GetData");
    myClassl data = await response.Content.ReadAsAsync<myClassl>();

    return data ;
}

Thanks.

gsmida · Accepted Answer · 2013-03-04 21:09:00Z

1

Try the following solution:

HttpClient client = new HttpClient();
string baseApiAddress = ConfigurationManager.AppSettings["baseApiAddress"];
client.BaseAddress = new Uri(baseApiAddress);
client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
HttpResponseMessage response=client.GetAsync("/api/GetData",data, new JsonMediaTypeFormatter()).Result;
if (response.IsSuccessStatusCode)
{
var mydata = response.Content.ReadAsAsync<MyData>().Result;
}
else
{
Debug.WriteLine(response.ReasonPhrase);
}

answered Mar 4, 2013 at 21:09

gsmida

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4 Comments

user1644160 Over a year ago

When I use GetAsync I hace error in compilation, when i use PostAsync in webapi i have null parameter

gsmida Over a year ago

Sorry I forgot to tell to add the next lines of code inside your App.config file inside configuration (localhost:23602 is just an example use your port) <appSettings> <add key="baseApiAddress" value="localhost:23602/"> </appSettings>

Jidheesh Rajan Over a year ago

i am getting error: Error The best overloaded method match for 'System.Net.Http.HttpClient.GetAsync(string, System.Net.Http.HttpCompletionOption)' has some invalid arguments

Learner Over a year ago

GetAsync does not have a data param; most probably the params must be sent in URI

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