在DataGrid使用中,當有很多列時,可能會遇到選擇性的顯示列,那麼該怎麼辦呢,我是這麼做的:
首先讓MenuItem綁定DataGrid的所有列,然後將MenuItem的Item模板列改爲CheckBox,在讓CheckBox的Content綁定MenuItem的Header,讓IsChecked綁定列是否顯示隱藏(這裏有一個Convert轉換器),代碼如下:
Xaml:
<MenuItem Header="顯示隱藏列" ItemsSource="{Binding PlacementTarget.Columns, RelativeSource={RelativeSource AncestorLevel=1, AncestorType={x:Type ContextMenu}, Mode=FindAncestor}}">
<MenuItem.ItemTemplate>
<DataTemplate>
<CheckBox Content="{Binding Header,UpdateSourceTrigger=PropertyChanged}" IsChecked="{Binding Visibility,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged,Converter={StaticResource DataGridColumnVisibilityConvert}}"/>
</DataTemplate>
</MenuItem.ItemTemplate>
其中DataGridColumnVisibilityConvert轉換器在Resource中引用,然後有一個類實現:
<UserControl.Resources>
<local:DaraGridColumnVisibility x:Key="DataGridColumnVisibilityConvert"/>
</UserControl.Resources>
CS:
public class DaraGridColumnVisibility : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
bool flag = false;
Visibility vis = (Visibility)value;
switch (vis)
{
case Visibility.Hidden:
flag = false;
break;
case Visibility.Visible:
flag = true;
break;
default:
break;
}
return flag;
}
public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
bool flag = System.Convert.ToBoolean(value);
if (flag)
{
return Visibility.Visible;
}
else
{
return Visibility.Hidden;
}
}
}
OK,這樣就可以進行自由選擇顯示列的,是不是很簡單!