wpf 按名称获取值？

Question

在 c# 上的 WPF 上我有组合框

     <ComboBox x:Name="listCombobox" />

然后我添加它像

var list = new[]
 { 
new { Number = 1, Name = "Smith" },
new { Number = 12, Name = "John" } ,
new { Number = 14, Name = "Bon" } 

}.ToList();

foreach (var item in list)
{
   listCombobox.Items.Add(item.Name);
 }

我想在组合框中看到名称（就像现在一样）

但是当我选择时，在后面的代码中我会看到不是我选择的名称 我想查看选中的号码

谢谢！

Answer 1

这样定义一个类

public class dataObject 
{
   public  int Number { get; set; }
   public string Name { get; set; }            
}

并填充数据，

         List<dataObject> bindingList = new List<dataObject>();          
         bindingList.Add(new dataObject()
         {
             Name = "Smith",
             Number = 1
         });
         bindingList.Add(new dataObject()
         {
             Name = "John",
             Number = 12
         });
         bindingList.Add(new dataObject()
         {
             Name = "Bon",
             Number = 14
         });
        listCombobox.ItemsSource = bindingList;
        listCombobox.DisplayMemberPath = "Name";

在组合框的 selectionChanged 事件中，执行此操作，

private void listCombobox_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            dataObject result = (dataObject)listCombobox.SelectedItem;
            var selectedNumber = result.Number;           
        }

Answer 2

我会使用自定义 ListItem 类并将这种类型的对象分配给组合框控件的 ItemSource 属性，如下所示：

public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();

        var list = new List<ListItem>
         {
            new ListItem{ Value = 1, Text = "Smith" },
            new ListItem{ Value = 12, Text = "John" } ,
            new ListItem{ Value = 14, Text = "Bon" }
        }.ToList();

        listCombobox.ItemsSource = list;
        listCombobox.DisplayMemberPath = "Text";
        listCombobox.SelectedValuePath = "Value";
    }

    private void listCombobox_SelectionChanged(object sender, SelectionChangedEventArgs e)
    {
        var selectedItem = (sender as ComboBox).SelectedItem as ListItem;
        if (selectedItem != null)
        {
            // do something with the selected item
        }
    }
}

public class ListItem
{
    public string Text { get; set; }
    public int Value { get; set; }
}

Answer 3

我会这样解决：

...

foreach (var item in list)
    listCombobox.Items.Add(new ComboBoxItem() {
        Content = item.Name,
        Tag = item.Number
    });

您当然可以使用检索您的数据

int mytag = listCombobox.Items[3].Tag;

或

int seletected = listCombobox.SelectedItem.Tag;

---

PresentationFramework.dll::System.Windows.Frameworkelement.Tag 的 MSDN 参考

Answer 4

我认为最简单的方法是将这些数字作为每个 listCombobox 项目的标签：

foreach (var item in list) {
    listCombobox.Items.Add(new ComboBoxItem { Content = item.Name, Tag = item.Number });
}

并访问您的号码（例如OnSelectedItemchanged）：

void Cb_SelectionChanged(object sender, SelectionChangedEventArgs e) {
    int number = (int)((ComboBoxItem) listCombobox.SelectedItem).Tag;
}