我是以下代码
<DataGrid.RowHeaderTemplate >
<DataTemplate>
<CheckBox x:Name="SelectedItemCheckBox"
Margin="5 0 0 0"
IsChecked="{Binding Path=IsSelected,
Mode=TwoWay,
RelativeSource={RelativeSource FindAncestor,AncestorType={x:Type DataGridRow}}}">
</CheckBox>
</DataTemplate>
</DataGrid.RowHeaderTemplate>
要么
<DataGrid.RowHeaderStyle>
<Style TargetType="{x:Type DataGridRowHeader}">
<Setter Property="Background" Value="White"/>
<Setter Property="BorderThickness" Value="0"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type DataGridRowHeader}">
<CheckBox x:Name="SelectedItemCheckBox"
Margin="5 0 0 0"
IsChecked="{Binding Path=IsSelected,
Mode=TwoWay,
RelativeSource={RelativeSource FindAncestor,AncestorType={x:Type DataGridRow}}}">
</CheckBox>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</DataGrid.RowHeaderStyle>
当选择行时,如何从后面的代码访问Selected Item CheckBox?
到目前为止我所拥有的:
private CheckBox GetCheckbox(int index)
{
DataGridRow row = (DataGridRow)MyGrid.ItemContainerGenerator.ContainerFromIndex(index);
//how do I get to that checkbox here ?
}
MyGrid的ItemSource设置在代码后面,通常我会通过访问MyGrid.Columns []访问单元格,但这是一个行标题,它不是Columns []的一部分。
请注意,根据ItemSsource大小,有许多行定义了此复选框。
另外我想知道是否有办法访问复选框而不更改xaml并按原样使用它。
如果要访问代码隐藏中的行标题复选框(而不是使用绑定),则可以“移动”所选DataGridRow的可视树以查找标题。
将SelectionChanged事件处理程序添加到DataGrid:
<DataGrid x:Name="Grid" Loaded="Grid_Loaded" SelectionChanged="Grid_SelectionChanged">
然后在代码隐藏中:
private void Grid_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
var item = (DataGridRow)Grid.ItemContainerGenerator.ContainerFromItem(e.AddedItems[0]);
var control = FindChild<CheckBox>(item, "SelectedItemCheckBox");
control.IsChecked = true;
}
对于FindChild,这里有多个选项:How can I find WPF controls by name or type?
我在这个例子中使用了以下内容:How can I find WPF controls by name or type?
public static T FindChild<T>(DependencyObject depObj, string childName)
where T : DependencyObject
{
// Confirm obj is valid.
if (depObj == null) return null;
// success case
if (depObj is T && ((FrameworkElement)depObj).Name == childName)
return depObj as T;
for (int i = 0; i < VisualTreeHelper.GetChildrenCount(depObj); i++)
{
DependencyObject child = VisualTreeHelper.GetChild(depObj, i);
//DFS
T obj = FindChild<T>(child, childName);
if (obj != null)
return obj;
}
return null;
}