[英]How to use row index as a condition in a multitrigger for a DataGridCell style in WPF XAML?
I want to know how to use the row index as a condition in the same way the column index is used in the code below: 我想知道如何将行索引用作条件,就像在下面的代码中使用列索引一样:
<Style x:Key="DefaultDataGridCell" TargetType="{x:Type DataGridCell}">
<Setter Property="IsTabStop" Value="False" />
<Style.Triggers>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding RelativeSource={x:Static RelativeSource.Self}, Path=Column.DisplayIndex}" Value="0" />
</MultiDataTrigger.Conditions>
<Setter Property="IsTabStop" Value="True" />
</MultiDataTrigger>
</Style.Triggers>
In this example the entire first column of the DataGrid is tabstop but I only need the first cell of the DataGrid to be tabstop. 在此示例中,DataGrid的整个第一列都是tabstop,但我只需要将DataGrid的第一单元格设置为tabstop。 How can I do it? 我该怎么做?
There is no property that you can bind to that returns the index of the row but the DataGridRow
class has a GetIndex()
method that you could call in a converter class: 没有可以绑定到的属性可以返回行的索引,但是DataGridRow
类具有可在转换器类中调用的GetIndex()
方法:
namespace WpfApplication1
{
public class MyConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
return (value as DataGridRow).GetIndex();
}
public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
throw new NotImplementedException();
}
}
}
<Style x:Key="DefaultDataGridCell" TargetType="{x:Type DataGridCell}"
xmlns:local="clr-namespace:WpfApplication1">
<Style.Resources>
<local:MyConverter x:Key="conv" />
</Style.Resources>
<Setter Property="IsTabStop" Value="False" />
<Style.Triggers>
<MultiDataTrigger>
<MultiDataTrigger.Conditions>
<Condition Binding="{Binding RelativeSource={x:Static RelativeSource.Self}, Path=Column.DisplayIndex}" Value="0" />
<Condition Binding="{Binding RelativeSource={RelativeSource AncestorType=DataGridRow}, Converter={StaticResource conv}}" Value="0" />
</MultiDataTrigger.Conditions>
<Setter Property="IsTabStop" Value="True" />
</MultiDataTrigger>
</Style.Triggers>
</Style>
You cannot bind directly to a method though so you will have to use a converter. 但是,您不能直接绑定到方法,因此必须使用转换器。
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