1
我正在使用'mvvm'模式在wpf中的datagrid中实现全选复选框。我面对的问题是检查标题“选择全部”复选框,所有复选框都会被检查,但只能在滚动滚动条之后进行检查。如何解决这个问题?Datagrid没有正确更新,滚动时更新
向下滚动检查后滚动备份
[
private bool _IsSelected;
public bool IsSelected
{
get { return _IsSelected; }
set
{
_IsSelected = value;
OnPropertyChanged("IsSelected");
}
}
private bool _AllSelected;
public bool AllSelected
{
get { return _AllSelected; }
set
{
_AllSelected = value;
foreach (var reportListItemModel in UsecaseListItems)
{
reportListItemModel.IsSelected = this._AllSelected;
OnPropertyChanged("IsSelected");
}
OnPropertyChanged("AllSelected");
}
}
private ObservableCollection<UseCase> _usecaseListItems = new ObservableCollection<UseCase>();
public ObservableCollection<UseCase> UsecaseListItems
{
get { return _usecaseListItems; }
set {
_usecaseListItems = value;
OnPropertyChanged("UsecaseListItems");
}
}
XAML代码后,选择 '选择全部'
[
并再次
<DataGrid Grid.Row="0" ItemsSource="{Binding Path=UsecaseListItems, Mode=OneWay, NotifyOnSourceUpdated=True, UpdateSourceTrigger=PropertyChanged}" AutoGenerateColumns="False" Name="MyDataGrid"
CanUserAddRows="False" >
<DataGrid.Columns>
<DataGridCheckBoxColumn Binding="{Binding Path=IsSelected,UpdateSourceTrigger=PropertyChanged, Mode=TwoWay,IsAsync=True}" Width="50">
<DataGridCheckBoxColumn.HeaderTemplate>
<DataTemplate x:Name="dtAllChkBx">
<CheckBox Name="cbxAll" Content="All" IsChecked="{Binding Path=DataContext.AllSelected,RelativeSource={RelativeSource AncestorType=UserControl },Mode=TwoWay}"/>
</DataTemplate>
</DataGridCheckBoxColumn.HeaderTemplate>
</DataGridCheckBoxColumn>
<DataGridTemplateColumn Header="Name" Width="SizeToCells" IsReadOnly="True">
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<TextBlock Text="{Binding UsecaseName}" />
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>
</DataGrid.Columns>
</DataGrid>
请显示设置复选框的代码以及DataGrid的XAML。 – toadflakz
您的reportListItemModel.IsSelected属性是否通知属性已更改?我猜这不是。 – Muds