提供了一个无效的请求URI。请求URI必须是绝对URI，或者必须设置BaseAddress。尝试使用webservice开发者社区

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public class Customer
    public int id { get; set; }
    public string id_default_group { get; set; }
    public string id_lang { get; set; }
    public string newsletter_date_add { get; set; }
    public string ip_registration_newsletter { get; set; }
    public string last_passwd_gen { get; set; }
    public string secure_key { get; set; }
    public string deleted { get; set; }
    public string passwd { get; set; }
    public string lastname { get; set; }
    public string firstname { get; set; }
    public string email { get; set; }
    public string id_gender { get; set; }
    public string birthday { get; set; }
    public string newsletter { get; set; }
    public string optin { get; set; }
    public string website { get; set; }
    public string company { get; set; }
    public string siret { get; set; }
    public string ape { get; set; }
    public string outstanding_allow_amount { get; set; }
    public string show_public_prices { get; set; }
    public string id_risk { get; set; }
    public string max_payment_days { get; set; }
    public string active { get; set; }
    public string note { get; set; }
    public string is_guest { get; set; }
    public string id_shop { get; set; }
    public string id_shop_group { get; set; }
    public string date_add { get; set; }
    public string date_upd { get; set; }
    public string reset_password_token { get; set; }
    public string reset_password_validity { get; set; }
class Program
    static void ShowProduct(Customer customer)
        Console.WriteLine($"Email: {customer.email}\tFirst Name: {customer.firstname}");
    static async Task<Uri> CreateCustomerAsync(Customer customer)
        HttpClient client = new HttpClient();
        HttpResponseMessage response = await client.PostAsJsonAsync("api/customers/1?output_format=JSON", customer);
        response.EnsureSuccessStatusCode();
        // return URI of the created resource.
        return response.Headers.Location;
    static void Main()
        RunAsync().Wait();
    static async Task RunAsync()
        NetworkCredential hd = new NetworkCredential("INHFTLZLMLP1TUTJE7JL9LETCCEW63FN", "");
        HttpClientHandler handler = new HttpClientHandler {Credentials = hd };
        HttpClient client = new HttpClient(handler);
        client.BaseAddress = new Uri("http://localhost:8080/newprestashop/");
        client.DefaultRequestHeaders.Accept.Clear();
        client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
                Customer customer = new Customer();
                var url = await CreateCustomerAsync(customer);
                // Get the product
                customer = await GetProductAsync(url.PathAndQuery);
                ShowProduct(customer);
            catch (Exception e)
                Console.WriteLine(e.Message);
            Console.ReadLine();
    static async Task<Customer> GetProductAsync(string path)
        Customer customer = null;
        HttpClient client = new HttpClient();
        HttpResponseMessage response = await client.GetAsync(path);
        if (response.IsSuccessStatusCode)
            customer = await response.Content.ReadAsAsync<Customer>();
        return customer;
}

static async Task<Uri> CreateCustomerAsync(Customer customer)
    HttpClient client = new HttpClient();
    //you never set the BaseAddress 
    //or the authentication information
    //before making a call to a relative url!
    HttpResponseMessage response = await client.PostAsJsonAsync("api/customers/1?output_format=JSON", customer);
    response.EnsureSuccessStatusCode();
    // return URI of the created resource.
    return response.Headers.Location;
}

    public WrapperClass(Uri url, string username, string password, string proxyUrl = "")
        if (url == null)
            // ReSharper disable once UseNameofExpression
            throw new ArgumentNullException("url");
        if (string.IsNullOrWhiteSpace(username))
            // ReSharper disable once UseNameofExpression
            throw new ArgumentNullException("username");
        if (string.IsNullOrWhiteSpace(password))
            // ReSharper disable once UseNameofExpression
            throw new ArgumentNullException("password");
        //or set your credentials in the HttpClientHandler
        var authenticationHeaderValue = new AuthenticationHeaderValue("Basic",
            // ReSharper disable once UseStringInterpolation
            Convert.ToBase64String(Encoding.UTF8.GetBytes(string.Format("{0}:{1}", username, password))));
        _httpClient = string.IsNullOrWhiteSpace(proxyUrl)
            ? new HttpClient
                DefaultRequestHeaders = { Authorization = authenticationHeaderValue },
                BaseAddress = url
            : new HttpClient(new HttpClientHandler
                UseProxy = true,
                Proxy = new WebProxy
                    Address = new Uri(proxyUrl),
                    BypassProxyOnLocal = false,
                    UseDefaultCredentials = true
                DefaultRequestHeaders = { Authorization = authenticationHeaderValue },
                BaseAddress = url
        _httpClient.DefaultRequestHeaders.Accept.Clear();
        _httpClient.DefaultRequestHeaders.AcceptEncoding.Clear();
        _httpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
    public async Task<Member> SomeCallToHttpClient(string organizationId)
        var task = await _httpClient.GetStringAsync(<your relative url>));
        return JsonConvert.DeserializeObject<SomeType>(task,
            new JsonSerializerSettings {ContractResolver = new CamelCasePropertyNamesContractResolver()});
    }

static async Task<Uri> CreateCustomerAsync(Customer customer)
   HttpClient client = new HttpClient();

问 提供了一个无效的请求URI。请求URI必须是绝对URI，或者必须设置BaseAddress。尝试使用webservice EN

回答 2

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