Xamly将键盘焦点设置为DataGridTemplateColumn单元中的元素？ [英] Xamly set keyboard focus to an element in DataGridTemplateColumn cell?

问题描述

我已经在DataGridTemplateColumn.CellEditing DataTemplate中设置了一些东西。
我希望当单元格编辑加载并显示模板时，键盘焦点应该被赋予模板中的某个控件。

考虑这个例子，当你进入编辑模式时，文本框并不是以键盘为中心的：

pre > < Window x：Class =MainWindow
xmlns =http://schemas.microsoft.com/winfx/2006/xaml/presentation
xmlns：x = http://schemas.microsoft.com/winfx/2006/xaml
Title =MainWindowHeight =350Width =525>
<网格>
< DataGrid Name =dgAutoGenerateColumns =False>
< DataGrid.Columns>
< DataGridTemplateColumn Header =Title>
< DataGridTemplateColumn.CellTemplate>
< DataTemplate>
< TextBlock Text ={Binding Title}/>
< / DataTemplate>
< /DataGridTemplateColumn.CellTemplate>
< DataGridTemplateColumn.CellEditingTemplate>
< DataTemplate>
< TextBox Text ={Binding Title}/>
< / DataTemplate>
< /DataGridTemplateColumn.CellEditingTemplate>
< / DataGridTemplateColumn>
< DataGridTemplateColumn Header =Value>
< DataGridTemplateColumn.CellTemplate>
< DataTemplate>
< TextBlock Text ={Binding Note}/>
< / DataTemplate>
< /DataGridTemplateColumn.CellTemplate>
< DataGridTemplateColumn.CellEditingTemplate>
< DataTemplate>
< TextBox Text ={Binding Note}/>
< / DataTemplate>
< /DataGridTemplateColumn.CellEditingTemplate>
< / DataGridTemplateColumn>
< /DataGrid.Columns>
< / DataGrid>
< / Grid>
< / Window>


---

  MainWindow 
 
 Private Sub Window_Loaded（ByVal sender As Object，
 ByVal e As RoutedEventArgs）处理MyBase.Loaded 
 
 Dim data As New List（Of Item）From 
 {New Item，
 New Item，
 New Item} 
 dg.ItemsSource = data 
 End Sub 
 
 End Class 
 
 Public Class Item 
 Private Shared Number As Integer = 0 
 Sub New（）
 Number + = 1 
 End Sub 
 Public Property Title =Title & Number.ToString 
 Public Property Note =Note& Number.ToString 
 End Class 
  

解决方案

实际上很简单，上面的文本框应该改变如下：

 < TextBox Text ={Binding Title}
 FocusManager.FocusedElement ={Binding RelativeSource = {RelativeSource Self}}/> 
< TextBox Text ={Binding Note}
 FocusManager.FocusedElement ={Binding RelativeSource = {RelativeSource Self}}/> 
  

I've set stuff in a DataGridTemplateColumn.CellEditing DataTemplate. I want that when the cell editing loads and shows the template, keyboard-focus should be given to a certain control in the template.

Consider this example, when you go edit mode, the textbox is not keyboard-focused:

<Window x:Class="MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="MainWindow" Height="350" Width="525">
    <Grid>
    <DataGrid Name="dg" AutoGenerateColumns="False">
      <DataGrid.Columns>
        <DataGridTemplateColumn Header="Title">
          <DataGridTemplateColumn.CellTemplate>
            <DataTemplate>
              <TextBlock Text="{Binding Title}"/>
            </DataTemplate>
          </DataGridTemplateColumn.CellTemplate>
          <DataGridTemplateColumn.CellEditingTemplate>
            <DataTemplate>
              <TextBox Text="{Binding Title}"/>
            </DataTemplate>
          </DataGridTemplateColumn.CellEditingTemplate>
        </DataGridTemplateColumn>
        <DataGridTemplateColumn Header="Value">
          <DataGridTemplateColumn.CellTemplate>
            <DataTemplate>
              <TextBlock Text="{Binding Note}"/>
            </DataTemplate>
          </DataGridTemplateColumn.CellTemplate>
          <DataGridTemplateColumn.CellEditingTemplate>
            <DataTemplate>
              <TextBox Text="{Binding Note}"/>
            </DataTemplate>
          </DataGridTemplateColumn.CellEditingTemplate>
        </DataGridTemplateColumn>
      </DataGrid.Columns>      
    </DataGrid>
  </Grid>
</Window>

---

Class MainWindow 

  Private Sub Window_Loaded(ByVal sender As Object,
                            ByVal e As RoutedEventArgs) Handles MyBase.Loaded

    Dim data As New List(Of Item) From
      {New Item,
       New Item,
       New Item}
    dg.ItemsSource = data
  End Sub

End Class

Public Class Item
  Private Shared Number As Integer = 0
  Sub New()
    Number += 1
  End Sub
  Public Property Title = "Title " & Number.ToString
  Public Property Note = "Note " & Number.ToString
End Class

解决方案

Well answer was actually simple, the above textboxes should be changed as follows:

<TextBox Text="{Binding Title}"
  FocusManager.FocusedElement="{Binding RelativeSource={RelativeSource Self}}"/>
<TextBox Text="{Binding Note}"
  FocusManager.FocusedElement="{Binding RelativeSource={RelativeSource Self}}"/>

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