每当我在 UWP 中将选项从是更改为否时，如何从列表中替换选中单选按钮的值，反之亦然

Question

//这是针对列表中的两个单选按钮，当我改变主意单击选项是而不是否时，它会向列表中添加另一个值，而不是将列表中的答案值从 0 t0 1 或 1 更改为 0

private void Service_Checked(object sender, RoutedEventArgs e)
        {
            RadioButton rb = sender as RadioButton;
            if (rb != null)
            {
                string answer = rb.Content.ToString();
                switch (answer)
                {
                    case "Yes":
                        value = 1;
                        break;
                    case "No":
                        value = 0;
                        break;
                }
            }
            int RID = int.Parse(rb.DataContext.ToString());
            Questionnaire you = new Questionnaire();
            you.id = RID;
            you.answer = value;
            selectedItems.Add(you);
        }

选择提交按钮时

private void btnSend_Click(object sender, RoutedEventArgs e)
        {
            refno.id = txtRefNo.Text;
            string comment = txtComment.Text;
            Rootobjectsssss ratingClass = new Rootobjectsssss()
            {
                description = comment,
                booking = refno,
                rating = rating,
                questionnaire = selectedItems.ToArray(),
            };
            json = string.Empty;
            json = JsonConvert.SerializeObject(ratingClass, Formatting.Indented);
            Debug.WriteLine(json);
        }

我在哪里获得绑定到两个单选按钮的 ID

async void getData()
        {
            string url = "http://62.173.41.5:7500/NNRAService/webresources/customerResources/getQuestionaire";
            HttpClient client = new HttpClient();
            HttpResponseMessage response = await client.GetAsync(new Uri(url));
            var jsonString = await response.Content.ReadAsStringAsync();
            JsonArray root = JsonValue.Parse(jsonString).GetArray();
            for (uint i = 0; i < root.Count; i++)
            {
                string Question = root.GetObjectAt(i).GetNamedString("question");
                string Id = root.GetObjectAt(i).GetNamedNumber("id").ToString();
                var chan = new Class1
                {
                    question = Question,
                    id = Id,
                };
                feedbackList.Add(chan);
            };
            feedbackListView.ItemsSource = feedbackList;
        }

我的 Xalm 代码，它包含列表视图和我的单选按钮，我将 Id 绑定到两个按钮

<ListView Margin="10,0,10,20" Background="White" x:Name="feedbackListView">
                    <ListView.ItemTemplate>
                        <DataTemplate x:DataType="data:Rootobject">
                        <StackPanel Orientation="Vertical">
                                <TextBlock TextWrapping="Wrap" Text="{Binding question}"></TextBlock>
                            <StackPanel Orientation="Horizontal">
                                    <RadioButton DataContext="{Binding id}" Foreground="Green" Name="ServiceYes" Content="Yes"  Tag="Yes"  Checked="Service_Checked" ></RadioButton>
                                    <RadioButton DataContext="{Binding id}" Foreground="Red" Name="ServiceNo" Content="No" Tag="No"  Checked="Service_Checked"></RadioButton>
                            </StackPanel>
                        </StackPanel>
                            </DataTemplate>
                    </ListView.ItemTemplate>
                </ListView>

我的模型类

public class Class1
    {
        public string id { get; set; }
        public string question { get; set; }
    }

    public class Rootobjectsssss
    {
        public string description { get; set; }
        public Boooking booking { get; set; }
        public int rating { get; set; }
        public Questionnaire[] questionnaire { get; set; }
    }
    public class Boooking
    {
        public string id { get; set; }
    }
    public class Questionnaire
    {
        public int id { get; set; }
        public int answer { get; set; }
    }

Answer 1

我相信

您总是将更改的项目添加到选定项目列表中，这就是它添加而不是替换的原因。

您可能需要在将项目添加到选定项目之前进行检查。如下所示：

private void Service_Checked(object sender, RoutedEventArgs e)
    {
        RadioButton rb = sender as RadioButton;
        if (rb != null)
        {
            string answer = rb.Content.ToString();
            switch (answer)
            {
                case "Yes":
                    value = 1;
                    break;
                case "No":
                    value = 0;
                    break;
            }
        }
        int RID = int.Parse(rb.DataContext.ToString());
        Questionnaire temp = selectedItems.FirstOrDefault(x => x.id == RID);
        if(temp == null)
        {
           Questionnaire you = new Questionnaire();
           you.id = RID;
           you.answer = value;
           selectedItems.Add(you);
        }
        else
        {
           temp.answer = value;
        }
    }