Question

我试图在组合框中定义所选项目。如果我只是使用String来声明所选项而不是使用对象，那么它工作正常。

<ComboBox HorizontalAlignment="Left"
  VerticalAlignment="Top" Width="81" materialDesign:HintAssist.Hint="Woche" Margin="10" 
  ItemsSource="{Binding weekSelection}" 
  DisplayMemberPath="name" 
  SelectedItem="{Binding nodeWeek, Mode=TwoWay}"  
SelectedValue="name" />

-

private week _nodeWeek;
public week nodeWeek
{
    get
    {
       return _nodeWeek;
    }
    set
    {
        _nodeWeek = value;
        RaisePropertyChanged("nodeWeek");
    }
}

-

 public class week
 {
    public int val { get; set; }

    public String name { get; set; }
 }

- 设置所选项目

this.nodeWeek = new week() { val = times.GetIso8601WeekOfYear(DateTime.Now), name = "KW " + times.GetIso8601WeekOfYear(DateTime.Now).ToString() };

有没有办法解决这个问题？

Answer 1

所选项目必须始终是您的商品来源列表之一。您无法创建新对象并将其分配给SelectedItem。 Combobox只是比较对象引用而不是内容。

WPF ComboBox选择参考对象的项目

1 个答案: