网络上充满了类似的问题，我也在SO上搜索过（最接近的：[1]，[2]，[3]）。
到目前为止，我无法相信这个问题是如此丑陋/非平凡。
我有一个DataGridView。我还有其他控件（在这种情况下：在DataGridView的列标题中）。我想支持一个快速的“跳转到网格”命令。这个命令需要将键盘焦点设置到网格，以便用户可以使用箭头键在行之间导航。
在下面的简单测试用例中，您可以轻松选择数据网格中的元素，但似乎没有办法给它键盘焦点。除非在代码后台操作中，即使在那种情况下，似乎也必须绕过一些障碍（参见[2]，通过调整单元格容器来设置键盘焦点，因为..从我所知道的所有情况来看，网格和行似乎都不起作用）。
看起来很简单吧？
一些简单的模型：
public class Item
{
public int DayOfMonth { get; set; }
public string Weekday { get; set; }
}
匹配微不足道的视图模型（假设您有一个RelayCommand实现，请参见JumpToGrid的主要部分）：
public class MainViewModel : INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;
private IList<Item> m_items;
public IList<Item> SampleItems
{
get { return m_items; }
set { SetField(ref m_items, value, () => SampleItems); }
}
private Item m_currentItem;
public Item CurrentItem
{
get { return m_currentItem; }
set { SetField(ref m_currentItem, value, () => CurrentItem); }
}
public ICommand JumpToGridCommand { get; private set; }
public MainViewModel()
{
JumpToGridCommand = new RelayCommand(p => JumpToGrid());
var items = new List<Item>();
var today = DateTime.Now;
for (int i = 1; i <= DateTime.DaysInMonth(today.Year, today.Month); i++ )
{
items.Add(new Item { DayOfMonth = i, Weekday = new DateTime(today.Year, today.Month, i).DayOfWeek.ToString() });
}
SampleItems = items;
}
private void JumpToGrid()
{
// I can change the selection just fine
CurrentItem = SampleItems[0];
// But the keyboard focus is broken, up/down doesn't work as expected
}
protected bool SetField<T>(ref T field, T value, Expression<Func<T>> selectorExpression)
{
if (selectorExpression == null) throw new ArgumentNullException("selectorExpression");
MemberExpression body = selectorExpression.Body as MemberExpression;
if (body == null) throw new ArgumentException("The body must be a member expression");
var fieldName = body.Member.Name;
if (EqualityComparer<T>.Default.Equals(field, value)) return false;
field = value;
OnPropertyChanged(fieldName);
return true;
}
protected void OnPropertyChanged(string propertyName)
{
PropertyChangedEventHandler handler = PropertyChanged;
if (handler != null)
{
handler(this, new PropertyChangedEventArgs(propertyName));
}
}
}
简单的视图（除了在加载事件中的“DataContext = new MainViewModel()”之外，代码后台为空）：
<Window x:Class="DataGridKeyboardFocus.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:DataGridKeyboardFocus"
Loaded="Window_Loaded"
Title="MainWindow" Height="350" Width="525">
<Grid>
<DataGrid
ColumnWidth="*"
AutoGenerateColumns="False"
Margin="1"
ItemsSource="{Binding SampleItems}"
SelectedItem="{Binding CurrentItem, Mode=TwoWay}"
SelectionUnit="FullRow"
IsReadOnly="True">
<DataGrid.Columns>
<DataGridTextColumn Binding="{Binding DayOfMonth}">
<DataGridTextColumn.HeaderTemplate>
<DataTemplate>
<StackPanel Orientation="Vertical">
<TextBlock Text="Some label" />
<TextBox>
<TextBox.InputBindings>
<KeyBinding Modifiers="Control" Key="Tab" Command="{Binding DataContext.JumpToGridCommand, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type local:MainWindow}}}" />
</TextBox.InputBindings>
</TextBox>
</StackPanel>
</DataTemplate>
</DataGridTextColumn.HeaderTemplate>
</DataGridTextColumn>
<DataGridTextColumn Binding="{Binding Weekday}">
<DataGridTextColumn.HeaderTemplate>
<DataTemplate>
<StackPanel Orientation="Vertical">
<TextBlock Text="Another label" />
<TextBox>
<TextBox.InputBindings>
<KeyBinding Modifiers="Control" Key="Tab" Command="{Binding DataContext.JumpToGridCommand, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type local:MainWindow}}}" />
</TextBox.InputBindings>
</TextBox>
</StackPanel>
</DataTemplate>
</DataGridTextColumn.HeaderTemplate>
</DataGridTextColumn>
</DataGrid.Columns>
</DataGrid>
</Grid>
</Window>
1: WPF中的键盘焦点与逻辑焦点 2: 将键盘焦点设置到DataGrid 3: WPF：无法控制键盘焦点
GotKeyboardFocus/LostKeyboardFocus事件（以及逻辑焦点变体）来记录焦点变化时的消息。如果我调用Keyboard.Focus()，我可以看到焦点被设置，但是当我按下箭头键时，焦点丢失并且显然移动到最右边的菜单项，因为该菜单会打开。 - fadden