我尝试创建一个包含itemscontrol的datagrid的自定义标头,该标头绑定到ObservableCollection< DateTime>.
(基本上,我想创建12列,每月一列 – >参见图片).
为什么这段代码不起作用?
码
<DataGrid x:Name="dgProjects" AutoGenerateColumns="False" ItemsSource="{Binding Projects}" AlternationCount="2" AlternatingRowBackground="LightGray">
<DataGrid.Columns>
...
<DataGridTemplateColumn Width="*">
<DataGridTemplateColumn.HeaderTemplate>
<DataTemplate>
<ItemsControl Grid.Row="1" ItemsSource="{Binding Path=Monate}" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Width="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=ActualWidth}">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<Canvas />
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
<ItemsControl.ItemTemplate>
<DataTemplate>
<TextBlock Text="{Binding Date}" Background="LightGreen" Margin="1"/>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
</DataTemplate>
</DataGridTemplateColumn.HeaderTemplate>
更新我将问题缩小到Binding.以下代码适用于finde
<DataGridTemplateColumn.HeaderTemplate>
<DataTemplate>
<Grid>
<ItemsControl ItemsSource="{Binding Projects}">
<TextBlock Text="asdf" Background="LightGreen" Margin="1"/>
<TextBlock Text="asdf" Background="LightGreen" Margin="1"/>
<TextBlock Text="asdf" Background="LightGreen" Margin="1"/>
</ItemsControl>
</Grid>
</DataTemplate>
</DataGridTemplateColumn.HeaderTemplate>
更新Viewmodel
public class vmProjektplanung : INotifyPropertyChanged
{
...
#region "Monate"
public event System.Collections.Specialized.NotifyCollectionChangedEventHandler OnMonateChanged;
private List<DateTime> monate;
public List<DateTime> Monate
{
get { return monate; }
set { monate = value; OnPropertyChanged(new PropertyChangedEventArgs("Monate")); }
}
private void Monate_CollectionChanged(object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e)
{
OnMonateChanged?.Invoke(sender, e);
}
#endregion
...
}
最佳答案 由于您对日期的绑定没有看到数据上下文,因此存在问题.
这应该通过按名称引用数据网格来解决问题.
<DataTemplate>
<ItemsControl ItemsSource="{Binding DataContext.Monate, ElementName=dgProjects}"