我将 WPF 组合框绑定(bind)到 ObservableCollection ItemCategoryList
<ComboBox Grid.Column="1" Grid.Row="2" Height="Auto" HorizontalAlignment="Stretch" Margin="0" Name="comboBox1" VerticalAlignment="Stretch" Width="Auto" ItemsSource="{Binding Path= ItemCategoryList}" DisplayMemberPath="Name" SelectedItem="{Binding Path=SelectedItemCategory,UpdateSourceTrigger=PropertyChanged}" SelectedIndex="{Binding Path=SelectIndexItemCategory}" />
并且绑定(bind)到 ObservableCollection ItemTypeList 和 ItemType 的 DataGrid 具有 ItemCategory 类型的嵌套对象 ItemCategory
<DataGrid AutoGenerateColumns="False" Grid.ColumnSpan="3" Grid.Row="3" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Width="Auto" Margin="10"
ItemsSource="{Binding ItemTypeList}"
SelectedItem="{Binding SelectedItemType}"
CanUserDeleteRows="False"
CanUserAddRows="False">
<DataGrid.Columns>
<DataGridTextColumn Binding="{Binding Path=ItemTypeID}" Header="ItemTypeID" IsReadOnly="True" Visibility="Hidden" />
<DataGridTextColumn Binding="{Binding Path=Name}" Header="Item Type Name" IsReadOnly="True" />
<DataGridTextColumn Binding="{Binding Path=ItemCategory.Name}" Header="Item Category" IsReadOnly="True" />
</DataGrid.Columns>
</DataGrid>
现在,当我在数据网格中选择一行时,我希望组合框选择该 ItemType 的相应 ItemCategory
private ItemType selectedItemType;
public ItemType SelectedItemType
{
get { return selectedItemType; }
set {
selectedItemType = value;
RaisePropertyChanged("SelectedItemType");
if (selectedItemType != null)
{
ItemTypeName = selectedItemType.Name;
SelectIndexItemCategory = ItemCategoryList.IndexOf(SelectedItemCategory);
}
}
}
private int selectIndexItemCategory;
public int SelectIndexItemCategory
{
get { return selectIndexItemCategory; }
set { selectIndexItemCategory = value;
RaisePropertyChanged("SelectIndexItemCategory");
}
}
编辑:
问题似乎出在这里:
SelectIndexItemCategory = ItemCategoryList.IndexOf(SelectedItemCategory);
Collection 中没有我可以使用的 find 方法吗?
最佳答案
在 SelectedItem
上使用绑定(bind)而不是 SelectedIndex
。
关于c# - 在 MVVM 框架的组合框中选择一个项目,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/6881984/