如何使用 xamarin 表单获取列表视图中切换开关项的 ID

Question

我有一个列表视图，所有列表视图项都在右端包含一个开关，如下图所示。

Listview Image

当我选择一个项目时，开关会触发 Toggled 事件。我的代码在下面添加：

Xaml：

 <Switch IsToggled="false"  Margin="210,2,2,2" Toggled="Switch_Toggled" />

Xaml.cs：

 private void Switch_Toggled(object sender, ToggledEventArgs e)
    {
       // I need the retail_modified_item_id of the selected item, how I can access that

    }
private void accept(object sender, EventArgs args)
    {
       // fetch all selected items and display success 
        DisplayAlert("Success", "Request Accepted and Updated", "OK");
    }

模型类：

namespace XamNative.Models
{

public class Human
{
    public string name { get; set; }
    public int retail_modified_item_id { get; set; }
    public double old_price { get; set; }
    public double new_price { get; set; }
}
}

当我点击接受按钮时，我需要所有选定商品[item1，item2] 的retail_modified_item_id？

Answer 1

获取开关的BindingContext，并从中获取您需要的ID

// list to hold all selected values
List<string> selected = new List<string>();

private void Switch_Toggled(object sender, ToggledEventArgs e)
{
   // I need the retail_modified_item_id of the selected item, how I can access that

   var switch = (Switch)sender;
   var human = (Human)switch.BindingContext;
   var id = human.retail_modified_item_id;

   // add/remove id from selected based on IsToggled
   if (switch.IsToggled) {
     if (!selected.Contains(id)) selected.Add(id);
   } else {
     if (selected.Contains(id)) selected.Remove(id);
   }
}