[英]WPF DataGrid binding to current object property from DataGridCell style
[英]WPF DataGridCell Style binding issue
我在将Collection绑定到DataGrid时遇到一个奇怪的问题,在该行上选择行时,绑定似乎消失了(我有一个空单元格)
这是我的物品清单
public ReadOnlyCollection<ItemPoint> CurrentItemPoints { get; private set; }
ItemPoint对象定义为:
public sealed class ItemPoint : PropertyChangedNotifierBase
{
private bool _IsSubscribed = false;
private string _Name = string.Empty;
private string _Value = string.Empty;
private DateTime _ValueTime = DateTime.UtcNow;
public bool IsSubscribed
{
get { return _IsSubscribed; }
set
{
if (_IsSubscribed != value)
ChangeSubscription(value);
ChangeProperty("IsSubscribed", ref _IsSubscribed, value);
}
}
public string Name
{
get { return _Name; }
private set
{
ChangeProperty("Name", ref _Name, value);
}
}
public string Value
{
get { return _Value; }
set
{
_Value = value;
}
}
public DateTime ValueTime
{
get { return _ValueTime; }
private set
{
ChangeProperty("ValueTime", ref _ValueTime, value);
}
}
}
这是我的xaml:
<DataGrid Name="PointsList" VerticalAlignment="Stretch" HorizontalAlignment="Stretch" Margin="2,0,0,0"
ItemsSource="{Binding CurrentItemPoints, UpdateSourceTrigger=PropertyChanged}" AutoGenerateColumns="False">
<DataGrid.Columns>
<DataGridCheckBoxColumn Binding="{Binding Path=IsSubscribed, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}" Width="10">
<DataGridCheckBoxColumn.CellStyle>
<Style>
<EventSetter Event="CheckBox.Checked" Handler="SubscriptionCheckBox_Checked"/>
</Style>
</DataGridCheckBoxColumn.CellStyle>
</DataGridCheckBoxColumn>
<DataGridTextColumn Binding="{Binding Name, UpdateSourceTrigger=PropertyChanged, Mode=OneWay}" Header="Name" Width="*"/>
<DataGridTextColumn Binding="{Binding Value, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay, IsAsync=True, NotifyOnSourceUpdated=True, NotifyOnTargetUpdated=True}" Header="WorkingValueColumn" Width="*"/>
<DataGridTextColumn Binding="{Binding Value, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay, IsAsync=True, NotifyOnSourceUpdated=True, NotifyOnTargetUpdated=True}" Header="NonWorkingValueColumn" Width="*">
<DataGridTextColumn.CellStyle>
<Style TargetType="{x:Type DataGridCell}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type DataGridCell}">
<ContentPresenter/>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</DataGridTextColumn.CellStyle>
</DataGridTextColumn>
<DataGridTextColumn Binding="{Binding Path=ValueTime, UpdateSourceTrigger=PropertyChanged, NotifyOnTargetUpdated=True, Mode=OneWay, StringFormat='{}{0:dd-MM-yyyy HH:mm:ss.fff}'}" Header="Time" Width="*">
</DataGridTextColumn>
</DataGrid.Columns>
</DataGrid>
如果现在显示数据网格,则一切正常……直到选择网格的任何单元格。
这样做,我将使“ WorkingValueColumn”正常运行...这意味着将继续显示选定的项目值,而“ NonWorkingValueColumn”将显示一个空单元格...
这是部分datagrid的屏幕截图:
我一直在找一阵子,却没有发现任何重复。尽管我可能会错过一些选择模板或类似的东西,但我真的不知道。
谢谢你的帮助!
最后,我可以解决通过DataTemplateColumn更改DataTextColumn的奇怪行为:
<DataGridTemplateColumn Header="Value">
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<TextBlock Text="{Binding Value, UpdateSourceTrigger=PropertyChanged, Mode=OneWay, NotifyOnSourceUpdated=True, NotifyOnTargetUpdated=True}" HorizontalAlignment="Stretch"/>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
<DataGridTemplateColumn.CellEditingTemplate>
<DataTemplate>
<TextBox Text="{Binding Value, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay, NotifyOnSourceUpdated=True, NotifyOnTargetUpdated=True}" BorderThickness="0" HorizontalAlignment="Stretch"/>
</DataTemplate>
</DataGridTemplateColumn.CellEditingTemplate>
</DataGridTemplateColumn>
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