Question

我试图创建填充了我从REST服务获得的数据的ComboBox。

在我的窗口中，我有获取数据和设置ViewModel的方法：

private void ComboBox_Loaded(object sender, RoutedEventArgs e)
        {
            String url = "http://localhost:8081/HTTP/testFrigoexim/prijem/getDodavatele";
            WebClient client = new WebClient();
            String response = client.DownloadString(url);
            Dodavatele dodavatele;

            DataContractJsonSerializer serializer = new DataContractJsonSerializer(typeof(Dodavatele));
            using (var stream = new MemoryStream(Encoding.UTF8.GetBytes(response)))
            {
                dodavatele = (Dodavatele)serializer.ReadObject(stream);
            }

            ComboBoxDodavatele.DataContext = new ViewModel(dodavatele);
        }

Class表示来自REST服务的数据：

namespace TestovaciAplikace.Prijem
{
    [DataContract]
    public class Dodavatele
    {
        [DataMember]
        public List<Dodavatel> dodavatele { get; set; }
    }

    public class Dodavatel
    {
        public string CODE { get; set; }
    }
}

和上一课，ViewModel

namespace TestovaciAplikace.Prijem
{
    public class ViewModel : NotifyPropertyChanged
    {
        public Dodavatele dodavatele { get; set; }

        public ViewModel(Dodavatele dodavatele)
        {
            this.dodavatele = dodavatele;
        }
    }
}

绑定到ComboBox是

 <ComboBox Name="ComboBoxDodavatele" HorizontalAlignment="Left" Margin="109,10,0,0" VerticalAlignment="Top" Width="210" Height="35"
                  Loaded="ComboBox_Loaded" ItemsSource="{Binding dodavatele}" DisplayMemberPath="CODE"/

如果我运行程序，ComboBox为空。如果我替换ny ViewModel只返回简单的List<String>它可以工作（如果我更改绑定属性），但我不能使用我的JSON数据。有什么建议吗？

Answer 1

由于ViewModel和Dodavatele类都具有dodavatele属性，因此ItemsSource Binding应该如下所示

ItemsSource="{Binding dodavatele.dodavatele}"

将数据从REST服务绑定到ComboBox

1 个答案: