Question

我使用的是ListBox，数据是一个类：

private class Duration
{
    public int Value { get; set; }
    public string Label { get; set; }
}

我以这种方式绑定类：

var durations = new List<Duration>() 
  {
    new Duration() { Value = 5, Label = "5 minutes" }, 
    new Duration() { Value = 10, Label = "10 minutes" }, 
    new Duration() { Value = 15, Label = "15 minutes" }, 
    new Duration() { Value = 30, Label = "30 minutes" }, 
    new Duration() { Value = 45, Label = "45 minutes" }, 
    new Duration() { Value = 60, Label = "1 hour" }, 
    new Duration() { Value = 90, Label = "1 hour and half" } 
  };
this.listTime.DataSource = durations;
this.listTime.DisplayMember = "Label";
this.listTime.ValueMember = "Value";

一切正常，标签显示。当我去读取所选值时，我无法恢复所选项目的值。

我原本希望能够做到这一点：

int value = listTime.SelectedItems[0].Value;

或至少这个：

Duration value = listTime.SelectedItems[0];

但是这给了我错误，我做错了什么？如何在ListBox上获取所选项目的价值的正确方法？

Answer 1

if (listTime.SelectedIndex != -1)
{
    var item = listTime.SelectedItem as Duration;
    //or as suggested by 'Stu'
    var item = (Duration)listTime.SelectedItem;
    MessageBox.Show(item.Value.ToString());
}

Answer 2

如果您使用Listbox，则此代码为Ok：

listTime.Items[0].Value

使用List从listBox获取值

2 个答案: