其余POST API与POSTMAN一起使用，但不与Xamarin.Forms一起使用

Question

将代码放在我的HttpPost请求中

async void ContinueBtn_Clicked(object sender, EventArgs e)
{
    if (!CheckValidation())
    {
        LoginBLL cust = new LoginBLL();
        EncryptPassword encrypt = new EncryptPassword();

        cust.name = txtFieldName.Text;
        cust.email = txtFieldEmail.Text;
        cust.Password = encrypt.HashPassword(txtFieldPass.Text);
        cust.profession = txtFieldJob.Text;
        cust.company = txtFieldCompany.Text;
        cust.subId = 1320;

        HttpClient client = new HttpClient();
        string url = "https://www.example.com/api/customer/";
        var uri = new Uri(url);
        client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
        HttpResponseMessage response;
        var json = JsonConvert.SerializeObject(cust);
        var content = new StringContent(json, Encoding.UTF8, "application/json");
        response = await client.PostAsync(uri, content);


        if (response.StatusCode == System.Net.HttpStatusCode.Accepted)
        {
            validationName.Text = await response.Content.ReadAsStringAsync();
        }
        else
        {
            validationName.Text = await response.Content.ReadAsStringAsync();
        }

    }

执行上述功能时出现此错误

  

未找到与请求URI'https://www.example.com/api/customer/'相匹配的HTTP资源。

但是在具有相同变量的Postman中它可以正常工作。

我什至验证了POSTMAN中生成的JSON与Visual Studio中生成的JSON是完全相同的。

我正在iPhone 8 iOS 12.0上运行它