如果该行的数据具有指定状态，我当前正尝试更改单元格的宽度。每行显示一个包含多个列的MediaRow，如果出现错误（MediaRow的HasError = true），则应隐藏一些列，并应放大column 'status'并占用现在隐藏的空间-columns。
由于要求具有用户定义的列顺序，我将以编程方式创建列。
注意：为了便于阅读，我删除了几个列（因此也删除了MediaRow的属性）。
MediaRow：
public class MediaRow : INotifyPropertyChanged
{
private string _status = string.Empty;
private string _barcode = string.Empty;
private string _medgrp = string.Empty;
private bool _infield = false;
private bool _haserror = false;
public string MedGrp
{
get => return _medgrp;
set { _medgrp = value; NotifyPropertyChanged(); }
}
public string Barcode
{
get => return _barcode;
set { _barcode = value; NotifyPropertyChanged(); }
}
public string Status
{
get => return _status;
set
{
_status = value; NotifyPropertyChanged();
HasError = (value.ToLower().StartsWith("error")) ? true : false;
}
}
public bool InField
{
get => return _infield;
set { _infield = value; NotifyPropertyChanged(); }
}
public bool HasError
{
get => return _haserror;
set { _haserror = value; NotifyPropertyChanged(); }
}
public string Description { get; set; }
}
创建列：
private void PopulateColumns()
{
ObservableCollection<DataGridColumn> _loccolumns = new ObservableCollection<DataGridColumn>();
DataGridTextColumn barcodecolumn = new DataGridTextColumn();
barcodecolumn.Header = ResourceManagerService.GetResourceString("EasyTerminalClient_NG", "ColumnBarcode");
barcodecolumn.Width = new DataGridLength(Settings.Instance.CheckinColumnTable["barcode"], DataGridLengthUnitType.Star);
barcodecolumn.Binding = new Binding { Path = new PropertyPath("Barcode"), Mode = BindingMode.TwoWay };
barcodecolumn.Visibility = Visibility.Hidden;
barcodecolumn.HeaderStyle = new Style(typeof(System.Windows.Controls.Primitives.DataGridColumnHeader));
barcodecolumn.HeaderStyle.Setters.Add(new Setter(Control.HorizontalContentAlignmentProperty, HorizontalAlignment.Left));
barcodecolumn.HeaderStyle.Setters.Add(new Setter(Control.BackgroundProperty, System.Windows.Media.Brushes.Transparent));
barcodecolumn.HeaderStyle.Setters.Add(new Setter(Control.FontSizeProperty, new Binding { Path = new PropertyPath("headerSize"), Source = (EasyCheck.EasyTerminalClient_NG.Util.FontDetails)App.Current.FindResource("FontDetails") }));
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 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") }));
statuscolumn.CellStyle = new Style(typeof(DataGridCell));
//statuscolumn.CellStyle.Setters.Add(new Setter(DataGridCell.MarginProperty, "-5,-5,-5,0"));
//statuscolumn.CellStyle.Setters.Add(new Setter(DataGridCell.ActualWidthProperty, 500.0));
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 "barcode":
thiscolumn = barcodecolumn;
break;
case "mediagroup":
thiscolumn = medgrpcolumn;
break;
case "state":
thiscolumn = statuscolumn;
break;
}
if (thiscolumn != null)
{
thiscolumn.Visibility = Visibility.Visible;
thiscolumn.DisplayIndex = i;
_loccolumns.Add(thiscolumn);
}
}
ColumnCollection = _loccolumns;
}
}
XAML：
<UserControl.Resources>
<DataTemplate x:Key="RowDetailTemplate">
<Grid x:Name="RowDetailGrid"
Width="952"
Height="Auto"
Margin="5">
<Border HorizontalAlignment="Left"
VerticalAlignment="Top"
CornerRadius="5">
<Border.Background>
<LinearGradientBrush StartPoint="0,0" EndPoint="0,1">
<GradientStop Offset="0" Color="WhiteSmoke" />
<GradientStop Offset="0.75" Color="#AAFFFFAA" />
<GradientStop Offset="1" Color="#AAFFD455" />
</LinearGradientBrush>
</Border.Background>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<TextBlock Grid.Row="0"
Margin="10"
HorizontalAlignment="Center"
FontSize="{Binding headerSize, Source={StaticResource FontDetails}}"
FontWeight="Black"
Text="Weitere Details" />
<TextBlock Grid.Row="1"
Margin="10"
HorizontalAlignment="Left"
Text="{Binding Description}"
TextWrapping="WrapWithOverflow" />
</Grid>
</Border>
<Border Margin="0,0,0,0" CornerRadius="5">
<Border.Background>
<RadialGradientBrush Center="0.5,1" GradientOrigin="0,1" Opacity="0.3" RadiusX="0.8" RadiusY="0.8">
<GradientStop Offset="1" Color="#AACCCCCC" />
<GradientStop Offset="1" Color="WhiteSmoke" />
</RadialGradientBrush>
</Border.Background>
</Border>
</Grid>
</DataTemplate>
</UserControl.Resources>
<DataGrid x:Name="dataGrid1"
Margin="10,10,0,0"
HorizontalAlignment="Left"
VerticalAlignment="Top"
AlternationCount="2"
AutoGenerateColumns="False"
c:DataGridColumnsBehavior.BindableColumns="{Binding ColumnCollection, UpdateSourceTrigger=PropertyChanged}"
ItemsSource="{Binding MediaRowCollection, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged }"
MinRowHeight="26"
RowDetailsTemplate="{StaticResource RowDetailTemplate}"
RowDetailsVisibilityChanged="dataGrid1_RowDetailsVisibilityChanged"
Loaded="dataGrid1_Loaded"
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.RowHeaderTemplate>
<DataTemplate>
<ToggleButton x:Name="RowHeaderToggleButton"
Click="ToggleButton_Click"
Cursor="Hand"/>
</DataTemplate>
</DataGrid.RowHeaderTemplate>
</DataGrid>
在第一步中，我忽略了HasError条件，只是尝试将所需的效果应用于状态单元格，但没有成功。我刚刚得到一个未处理的异常。 （我在“创建列”部分中作为注释留下的相应代码。）
System.ArgumentException：'“ - 5，-5，-5,0”istkeginültigerWertfürdie Eigenschaft“System.Windows.FrameworkElement.Margin”auf einem “设置器”。“
应转换为：
System.ArgumentException：' - “ - 5，-5，-5,0”对于“Setter”上的属性“System.Windows.FrameworkElement.Margin”无效。'
问题：
如何达到预期效果？
如果应隐藏MediaRow的HasError == true MedGrp单元格，则状态单元格应占用MedGrp单元格的空间。
我会对任何建议感到高兴，即使它只是针对新状态宽度的固定值。
答案 0 :(得分：1)
您无法将Margin属性设置为string。您应该将其设置为Thickness：
statuscolumn.CellStyle.Setters.Add(new Setter(DataGridCell.MarginProperty, new Thickness(-5,-5,-5,0))));
这应该摆脱你得到的ArgumentException。