Datagrid Column标头应检查/取消选中CheckBox的状态，具体取决于是否选中或取消选中DataGridView列的所有CheckBoxes

Question

我遇到的问题与DataGrid（WPF）中的复选框有关。我已附上截图以更好地理解问题。

问题：即使其中一个子项未选中，也会检查DataHeader列复选框。我希望解决方案能够解决这个问题，以便在用户明确取消选中其中一个子节点时，应该隐式取消选中ALL（列标题）。

请帮帮我们......谢谢 Plz检查链接。我希望解决方案能够像这样工作。 http://www.codeproject.com/Articles/42437/Toggling-the-States-of-all-CheckBoxes-Inside-a-Dat#

<dg:DataGrid.Columns>
    <dg:DataGridCheckBoxColumn Binding="{Binding Check}" IsThreeState="True" Width="50">
        <dg:DataGridCheckBoxColumn.HeaderTemplate>
            <DataTemplate x:Name="dtAllChkBx">
                <CheckBox Name="cbxAll" Content="{x:Static properties:Resources.lblAll}"
                          Checked="CheckBox_Checked" Unchecked="CheckBox_Unchecked" />
            </DataTemplate>
        </dg:DataGridCheckBoxColumn.HeaderTemplate>
    </dg:DataGridCheckBoxColumn>

private void CheckBox_Unchecked(object sender, RoutedEventArgs e)
{
    unchck_all_prd();
    dgEnggAcc.Items.Refresh();
}

private void unchck_all_prd()
{
    for (int i = 0; i < engg_list.Count; i++)
    {
        engg_list[i].Check = false;
    }
}

private void chck_all_prd()
{
    for (int i = 0; i < engg_list.Count; i++)
    {
        engg_list[i].Check = true;
    }
}

public class EnggLst : ObservableCollection<EnggLst>
{
    public bool Check { get; set; }
}

Answer 1

//this event is for **Checked and UnChecked** of up check box (cbxall)
private void UpCheckbox_Checked(object sender, RoutedEventArgs e)
{
    //checkBox1 = cbxall (your up checkbox)
    if (checkBox1.IsChecked == true)
    {
        dataGrid1.Items.OfType<YourClass>().ToList().ForEach(x => x.IsChecked = true);
    }
    else
    {
        dataGrid1.Items.OfType<YourClass>().ToList().ForEach(x => x.IsChecked = false);
    }
}

//this event is for all other check box
//**Checked and UnChecked** of all other check box is this event
private void OtherCheckbox_Checked(object sender, RoutedEventArgs e)
{
    //checkBox1 = cbxall (your up checkbox)
    if (dataGrid1.Items.OfType<YourClass>().All(x => x.IsChecked == true))
    {
        checkBox1.IsChecked = true;
    }
    else if (dataGrid1.Items.OfType<YourClass>().All(x => x.IsChecked == false))
    {
        checkBox1.IsChecked = false;
    }
    else
    {
        checkBox1.IsChecked = null;
    }
}

Answer 2

在您的XAML Datagrid中添加：

<DataGridTemplateColumn.Header>
<CheckBox x:Name="ckbHeader" Click="ckbHeader_Click"></CheckBox>
</DataGridTemplateColumn.Header>

在您的代码中添加：

var ckbox = sender as CheckBox;
var All = Collection.View.SourceCollection as List<ObjectX>;

if (ckbox.IsChecked == true)
{
    foreach (var item in All)       
        item.Marked = true;     
}
else
{
    foreach (var item in All)       
        item.Marked = false;        
}
Collection.View.Refresh();

注意：发件人是CheckBox