wpf 数据网格标题中的访问复选框
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/14732096/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Access checkbox in wpf datagrid header
提问by hs2d
Hei,
嘿，
I need help figuring out how to access checkbox in wpf datagrid header. Here's what i have:
我需要帮助弄清楚如何访问 wpf datagrid 标头中的复选框。这是我所拥有的：
<DataGrid.Columns>
<DataGridTemplateColumn CanUserReorder="False" CanUserResize="False">
<DataGridTemplateColumn.HeaderTemplate>
<DataTemplate>
<CheckBox Name="cbxAll" Checked="CheckBox_Checked" Unchecked="CheckBox_Unchecked" HorizontalContentAlignment="Center" VerticalContentAlignment="Center" HorizontalAlignment="Center" VerticalAlignment="Center" />
</DataTemplate>
</DataGridTemplateColumn.HeaderTemplate>
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<CheckBox IsChecked="{Binding Path=Checked, UpdateSourceTrigger=PropertyChanged}" IsEnabled="{Binding Path=NoErrors}" Name="theCheckbox" HorizontalContentAlignment="Center" VerticalContentAlignment="Center" HorizontalAlignment="Center" VerticalAlignment="Center" />
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>
</DataGrid.Columns>
I have set the Namefor the checkbox, but for some reason i cant access it from on the code side.
我已经Name为复选框设置了，但由于某种原因我无法从代码端访问它。
I need to access the checkbox to uncheck it after i refresh my datagrid items. How can i do this?
刷新数据网格项目后，我需要访问复选框以取消选中它。我怎样才能做到这一点？
采纳答案by Eirik
Allthough binding might be the way you should go, it is possible to do what you ask. Here's one way of doing it:
尽管绑定可能是您应该采用的方式，但您可以按照您的要求去做。这是一种方法：
1.Give your header CheckBoxan Uid
1.给你的标题CheckBox一个Uid
<CheckBox Uid="CheckAll" />
2.Name your DataGrid
2.命名你的 DataGrid
<DataGrid Name="myDataGrid" />
3.Implement the following extension method
3.实现如下扩展方法
public static UIElement FindUid(this DependencyObject parent, string uid)
{
var count = VisualTreeHelper.GetChildrenCount(parent);
if (count == 0) return null;
for (int i = 0; i < count; i++)
{
var el = VisualTreeHelper.GetChild(parent, i) as UIElement;
if (el == null) continue;
if (el.Uid == uid) return el;
el = el.FindUid(uid);
if (el != null) return el;
}
return null;
}
4.Access and uncheck the CheckBoxin code behind like this
4.CheckBox像这样访问并取消选中后面的代码
CheckBox checkBox = myDataGrid.FindUid("CheckAll") as CheckBox;
checkBox.IsChecked = false;
回答by JoanComasFdz
A working example in MVVM:
MVVM 中的一个工作示例：
ViewModel
视图模型
public class MainWindowViewModel : INotifyPropertyChanged
{
private bool allItemsAreChecked;
public event PropertyChangedEventHandler PropertyChanged;
public bool AllItemsAreChecked
{
get
{
return this.allItemsAreChecked;
}
set
{
this.allItemsAreChecked = value;
var handler = this.PropertyChanged;
if (handler != null)
{
handler(this, new PropertyChangedEventArgs("AllItemsAreChecked"));
}
}
}
}
XAML
XAML
<DataGridTemplateColumn CanUserReorder="False" CanUserResize="False">
<DataGridTemplateColumn.HeaderTemplate>
<DataTemplate>
<CheckBox IsChecked="{Binding
RelativeSource={RelativeSource AncestorType={x:Type DataGrid}},
Path=DataContext.AllItemsAreChecked}" />
</DataTemplate>
</DataGridTemplateColumn.HeaderTemplate>
</DataGridTemplateColumn>
回答by Darlan Dieterich
Set one simple event:
设置一个简单的事件：
<CheckBox x:Name="cbxAll" Click="cbxAll_Click"/>
In the event Click on the code:
在事件中点击代码：
private void cbxAll_Click(object sender, RoutedEventArgs e)
{
var ckbox = sender as CheckBox;
if (ckbox.IsChecked == true)
{
//Check all itens
}
else
{
//Uncheck all itens
}
}
NOTE: The sender is checkbox
注意：发件人是复选框
