private async Task SubQusition(Model.Qusition qusition)
        {
            HttpClient httpClient = new HttpClient();

            httpClient.DefaultRequestHeaders.Clear();
            httpClient.DefaultRequestHeaders.Accept.Add(new System.Net.Http.Headers.MediaTypeWithQualityHeaderValue("application/json"));
            var content  = new StringContent(JsonConvert.SerializeObject(qusition), Encoding.UTF8, "application/json");
            var response = await httpClient.PostAsync("http://localhost:60671/api/qusition/AddQusition", content);

            var res = await response.Content.ReadAsAsync <bool>();

            if (res == true)
            {
                AcceptButton.IsEnabled = false;
            }
        }
 /// <summary>
 /// 提交提问
 /// </summary>
 /// <param name="sender"></param>
 /// <param name="e"></param>
 private async void Submit_Click(object sender, RoutedEventArgs e)
 {
     if (Qusitiondetail.Text == "")
     {
         Qusitiondetail.PlaceholderText       = "没输入内容";
         Qusitiondetail.PlaceholderForeground = new SolidColorBrush(Colors.Red);
     }
     else if (QusitionDescribe.Text == "")
     {
         QusitionDescribe.PlaceholderForeground = new SolidColorBrush(Colors.Red);
         QusitionDescribe.PlaceholderText       = "没输入内容";
     }
     else if (labels.Count == 0)
     {
         await ContentD();
     }
     if (QusitionDescribe.Text != "" && Qusitiondetail.Text != "" && labels.Count >= 1)
     {
         Model.Qusition qusition = new Model.Qusition
         {
             Askerid         = myStruct.id,
             AskTime         = DateTime.Now,
             UpAskTime       = DateTime.Now,
             QusitionTitle   = QusitionDescribe.Text,
             QusitionContent = Qusitiondetail.Text,
             Qlabel0         = labels[0].Labelname,
         };
         if (labels.Count == 1)
         {
             qusition.Qlabel1 = "";
             qusition.QLabel2 = "";
         }
         if (labels.Count == 2)
         {
             qusition.Qlabel1 = labels[1].Labelname;
             qusition.QLabel2 = "";
         }
         if (labels.Count == 3)
         {
             qusition.Qlabel1 = labels[1].Labelname;
             qusition.QLabel2 = labels[2].Labelname;
         }
         await SubQusition(qusition);
     }
 }