从Xamarin形式的Rest API检索数据

Question

I created a web service with wcf that get two string parameters and give an string value, this web service hosted in IIS and it work correctly, this is a part of my code and it gives json format:

[OperationContract]
    [WebInvoke(UriTemplate = "AuthUserPass", ResponseFormat = WebMessageFormat.Json, RequestFormat = WebMessageFormat.Json)]
    string AuthUserPass(string UserName);

Now i want to retrieve the data from this service in xamarin forms but i don't know how to do it: my code for this is:

    public async Task<int> AuthUserPassAsync(string username,string password)
    {
        int sessionResponseJson = 1000;
        var uri = new Uri(string.Format(Constants.AuthUrl, string.Empty));

        Users userJson = new Users();
        userJson.UserName = username;
        userJson.Password = password;

        var json = JsonConvert.SerializeObject(userJson);
        var content = new StringContent(json, Encoding.UTF8, "application/json");
        var response = await client.PostAsync("login", content);

        var result = response.Content.ReadAsStringAsync().Result;
        if (result != "")
        {
            sessionResponseJson = JsonConvert.DeserializeObject<int>(result);
        }
        return sessionResponseJson;

}

Answer 1

From your web service method I can see, it requires only one string parameter that is 'UserName'

    string AuthUserPass(string UserName);

And when calling the web service method, you are passing an object with two fields 'UserName' and 'Password'

    Users userJson = new Users();
    userJson.UserName = username;
    userJson.Password = password;

which you can understand is not correct. I am sure fixing it will resolve your problem. And to fix you can change your web service method parameter type as type with fields as UserName and Password.