在我的数据网格中，我以编程方式添加列，以便我可以定义它们的顺序
如果显示的项目（MediaRow）包含由其属性HasError指示的错误，则会隐藏其他一些列，并希望StatusColumn使用现在为空的空格。
为此，我使用绑定到HasError的DataTrigger。
在那个触发器中，我设置了保证金，但这并没有按预期工作。
如果我使用固定值，它就可以工作。
dt.Setters.Add(new Setter(DataGridCell.MarginProperty, new Thickness(-150,0,0,0))
但如果我使用绑定它就不会。
dt.Setters.Add(new Setter(DataGridCell.MarginProperty, new Binding() { Path = new PropertyPath("StatusColumnMargin"), Mode = BindingMode.OneWay}));
我是否需要将绑定应用于另一个
StatusColumnMargin方式还是这是正确的方法？
class Blibla : VMBase
{
private Thickness _statusColumnMargin;
public Thickness StatusColumnMargin
{
get => _statusColumnMargin;
set
{
_statusColumnMargin = value;
RaisePropertyChanged();
}
}
private ObservableCollection<DataGridColumn> _columns;
public ObservableCollection<DataGridColumn> ColumnCollection
{
get { return _columns; }
set
{
if (_columns != value)
{
_columns = value;
RaisePropertyChanged();
}
}
}
private ObservableCollection<MediaRow> mediaRowCollection;
public ObservableCollection<MediaRow> MediaRowCollection
{
get
{
return mediaRowCollection;
}
set
{
mediaRowCollection = value;
RaisePropertyChanged();
}
}
private void PopulateColumns()
{
if (StatusColumnMargin == null)
StatusColumnMargin = new Thickness(-150, 0, 0, 0);
ObservableCollection<DataGridColumn> _loccolumns = new ObservableCollection<DataGridColumn>();
DataGridTextColumn medgrpcolumn = new DataGridTextColumn();
medgrpcolumn.Header = ResourceManagerService.GetResourceString("EasyTerminalClient_NG", "ColumnMediaGroup");
medgrpcolumn.Width = new DataGridLength(Settings.Instance.CheckinColumnTable["mediagroup"], DataGridLengthUnitType.Star);
medgrpcolumn.Binding = new Binding { Path = new PropertyPath("MedGrp"), Mode = BindingMode.TwoWay };
medgrpcolumn.Visibility = Visibility.Hidden;
medgrpcolumn.HeaderStyle = new Style(typeof(System.Windows.Controls.Primitives.DataGridColumnHeader));
medgrpcolumn.HeaderStyle.Setters.Add(new Setter(Control.HorizontalContentAlignmentProperty, HorizontalAlignment.Left));
medgrpcolumn.HeaderStyle.Setters.Add(new Setter(Control.BackgroundProperty, System.Windows.Media.Brushes.Transparent));
medgrpcolumn.HeaderStyle.Setters.Add(new Setter(Control.FontSizeProperty, new Binding { Path = new PropertyPath("headerSize"), Source = (EasyCheck.EasyTerminalClient_NG.Util.FontDetails)App.Current.FindResource("FontDetails") }));
medgrpcolumn.CellStyle = new Style(typeof(DataGridCell));
medgrpcolumn.CellStyle.Setters.Add(new Setter(DataGridCell.VisibilityProperty, new Binding() { Path = new PropertyPath("HasError"), Mode = BindingMode.OneWay, Converter = new InverseBool2VisibilityConverter() }));
DataGridTextColumn duedatecolumn = new DataGridTextColumn();
duedatecolumn.Header = ResourceManagerService.GetResourceString("EasyTerminalClient_NG", "ColumnExpires");
//duedatecolumn.Width = new DataGridLength(Settings.Instance.CheckinColumnTable["expires"], DataGridLengthUnitType.Star);
duedatecolumn.Binding = new Binding { Path = new PropertyPath("DueDate"), Mode = BindingMode.TwoWay };
duedatecolumn.Visibility = Visibility.Hidden;
duedatecolumn.HeaderStyle = new Style(typeof(System.Windows.Controls.Primitives.DataGridColumnHeader));
duedatecolumn.HeaderStyle.Setters.Add(new Setter(Control.HorizontalContentAlignmentProperty, HorizontalAlignment.Left));
duedatecolumn.HeaderStyle.Setters.Add(new Setter(Control.BackgroundProperty, System.Windows.Media.Brushes.Transparent));
duedatecolumn.HeaderStyle.Setters.Add(new Setter(Control.FontSizeProperty, new Binding { Path = new PropertyPath("headerSize"), Source = (EasyCheck.EasyTerminalClient_NG.Util.FontDetails)App.Current.FindResource("FontDetails") }));
duedatecolumn.CellStyle = new Style(typeof(DataGridCell));
duedatecolumn.CellStyle.Setters.Add(new Setter(DataGridCell.VisibilityProperty, new Binding() { Path = new PropertyPath("HasError"), Mode = BindingMode.OneWay, Converter = new InverseBool2VisibilityConverter() }));
DataGridTextColumn statuscolumn = new DataGridTextColumn();
statuscolumn.Header = ResourceManagerService.GetResourceString("EasyTerminalClient_NG", "ColumnState");
statuscolumn.Width = new DataGridLength(Settings.Instance.CheckinColumnTable["state"], DataGridLengthUnitType.Star);
statuscolumn.Binding = new Binding() { Path = new PropertyPath("Status"), Mode = BindingMode.OneWay, Converter = new LanguageConverter(), FallbackValue = "???" };
statuscolumn.Visibility = Visibility.Hidden;
statuscolumn.HeaderStyle = new Style(typeof(System.Windows.Controls.Primitives.DataGridColumnHeader));
statuscolumn.HeaderStyle.Setters.Add(new Setter(Control.HorizontalContentAlignmentProperty, HorizontalAlignment.Left));
statuscolumn.HeaderStyle.Setters.Add(new Setter(Control.BackgroundProperty, System.Windows.Media.Brushes.Transparent));
statuscolumn.HeaderStyle.Setters.Add(new Setter(Control.FontSizeProperty, new Binding { Path = new PropertyPath("headerSize"), Source = (EasyCheck.EasyTerminalClient_NG.Util.FontDetails)App.Current.FindResource("FontDetails") }));
DataTrigger dt = new DataTrigger()
{
Binding = new Binding() { Path = new PropertyPath("HasError"), Mode = BindingMode.OneWay },
Value = "True"
};
dt.Setters.Add(new Setter(DataGridCell.MarginProperty, new Binding() { Path = new PropertyPath("StatusColumnMargin"), Mode = BindingMode.OneWay}));
//dt.Setters.Add(new Setter(DataGridCell.MarginProperty, new Thickness(-150,0,0,0)));
Style cellStyle = new Style(typeof(DataGridCell));
cellStyle.Triggers.Add(dt);
statuscolumn.CellStyle = cellStyle;
DataGridBoundTemplateColumn imagestatecolumn = new DataGridBoundTemplateColumn();
imagestatecolumn.Width = new DataGridLength(Settings.Instance.CheckinColumnTable["imagestate"], DataGridLengthUnitType.Star);
imagestatecolumn.Visibility = Visibility.Hidden;
imagestatecolumn.HeaderStyle = new Style(typeof(System.Windows.Controls.Primitives.DataGridColumnHeader));
imagestatecolumn.HeaderStyle.Setters.Add(new Setter(Control.HorizontalContentAlignmentProperty, HorizontalAlignment.Center));
imagestatecolumn.HeaderStyle.Setters.Add(new Setter(Control.BackgroundProperty, System.Windows.Media.Brushes.Transparent));
imagestatecolumn.HeaderStyle.Setters.Add(new Setter(Control.FontSizeProperty, new Binding { Path = new PropertyPath("headerSize"), Source = (EasyCheck.EasyTerminalClient_NG.Util.FontDetails)App.Current.FindResource("FontDetails") }));
imagestatecolumn.Binding = new Binding { Path = new PropertyPath("StatusImage"), Mode = BindingMode.TwoWay };
imagestatecolumn.CellTemplateSelector = App.Current.FindResource("mySelector") as DataTemplateSelector;
DataGridTextColumn bincolumn = new DataGridTextColumn();
bincolumn.Header = ResourceManagerService.GetResourceString("EasyTerminalClient_NG", "ColumnBin");
bincolumn.Width = new DataGridLength(Settings.Instance.CheckinColumnTable["bin"], DataGridLengthUnitType.Star);
bincolumn.Binding = new Binding { Path = new PropertyPath("Bin"), Mode = BindingMode.TwoWay };
bincolumn.Visibility = Visibility.Hidden;
bincolumn.HeaderStyle = new Style(typeof(System.Windows.Controls.Primitives.DataGridColumnHeader));
bincolumn.HeaderStyle.Setters.Add(new Setter(Control.HorizontalContentAlignmentProperty, HorizontalAlignment.Left));
bincolumn.HeaderStyle.Setters.Add(new Setter(Control.BackgroundProperty, System.Windows.Media.Brushes.Transparent));
bincolumn.HeaderStyle.Setters.Add(new Setter(Control.FontSizeProperty, new Binding { Path = new PropertyPath("headerSize"), Source = (EasyCheck.EasyTerminalClient_NG.Util.FontDetails)App.Current.FindResource("FontDetails") }));
bincolumn.CellStyle = new Style(typeof(DataGridCell));
bincolumn.CellStyle.Setters.Add(new Setter(DataGridCell.VisibilityProperty, new Binding() { Path = new PropertyPath("HasError"), Mode = BindingMode.OneWay, Converter = new InverseBool2VisibilityConverter() }));
bincolumn.CellStyle.Setters.Add(new Setter(DataGridCell.VerticalContentAlignmentProperty, VerticalAlignment.Center));
if (Settings.Instance.CheckinColumnSequence != null)
{
//string columnnames = "number|barcode|title|mediagroup|branch|expires|fee|state|imagestate|";
string[] columnSequence = Settings.Instance.CheckinColumnSequence;
for (int i = 0; i < columnSequence.Length; i++)
{
DataGridColumn thiscolumn = null;
switch (columnSequence[i])
{
case "mediagroup":
thiscolumn = medgrpcolumn;
break;
case "expires":
thiscolumn = duedatecolumn;
break;
case "state":
thiscolumn = statuscolumn;
break;
}
if (thiscolumn != null)
{
thiscolumn.Visibility = Visibility.Visible;
thiscolumn.DisplayIndex = i;
_loccolumns.Add(thiscolumn);
}
}
ColumnCollection = _loccolumns;
}
// doesn't have any effect
StatusColumnMargin = new Thickness(-300, 0, 0, 0);
}
}
<DataGrid x:Name="dataGrid1"
Margin="10,10,0,0"
AutoGenerateColumns="False"
c:DataGridColumnsBehavior.BindableColumns="{Binding ColumnCollection, UpdateSourceTrigger=PropertyChanged}"
ItemsSource="{Binding MediaRowCollection, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged }"
MinRowHeight="26"
Width="952"
IsReadOnly="True"
SelectionMode="Single"
CanUserReorderColumns="False"
CanUserResizeColumns="False"
CanUserSortColumns="False"
CanUserResizeRows="False"
HorizontalScrollBarVisibility="Disabled"
AreRowDetailsFrozen="True"
HeadersVisibility="Column" VerticalScrollBarVisibility="Auto" >
<DataGrid.RowStyle>
<Style TargetType="DataGridRow">
<Style.Triggers>
<DataTrigger Binding="{Binding InField}" Value="False">
<Setter Property="Background" Value="Transparent"/>
</DataTrigger>
<DataTrigger Binding="{Binding InField}" Value="True">
<Setter Property="Background" Value="#ffffffac"/>
</DataTrigger>
</Style.Triggers>
</Style>
</DataGrid.RowStyle>
</DataGrid>
答案 0 :(得分：1)
尝试将Source的{{1}}设置为定义了要绑定的Binding属性的对象：
StatusColumnMargin