我有一个数据网格。单击一行时，将显示rowdetails。在rowdetails中，我在datagrid旁边有另一个数据网格是DatePicker。
因此主数据网格具有自定义对象的集合。单击一行时，子数据网格将绑定到selecteditem.Funds（另一个列表）（代码如下所示）。 selectedItem还有一个datetime属性，我想绑定到我的DatePicker但是我无法让它工作。
我正在使用下面的一行
<DatePicker SelectedDate="{Binding SelectedItem.DateEffective2, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"/>
我假设（可能是错误的，因为datepicker在rowdetails中我能够绑定到selectedItem，猜猜我错了？
<DataGrid Grid.Row="1"
ItemsSource="{Binding HldLogEQCurr, UpdateSourceTrigger=PropertyChanged}"
SelectedItem="{Binding SelectedHldLogEq, UpdateSourceTrigger=PropertyChanged}"
Style="{StaticResource DataGridTemplate1}"
ColumnHeaderStyle="{StaticResource DG_ColumnHeaderCenter1}"
RowStyle="{StaticResource DG_Row1}"
CellStyle="{StaticResource DG_Cell1}"
RowHeaderStyle="{StaticResource DG_RowHeader1}"
AutoGenerateColumns="False"
HorizontalAlignment="Stretch"
Background="Silver"
Margin="50,50,50,50"
CanUserDeleteRows="False"
CanUserAddRows="False"
RowHeaderWidth="30">
<DataGrid.RowDetailsTemplate>
<DataTemplate>
<Grid x:Name="RowDetailGrid"
Margin="5"
HorizontalAlignment="Left">
<Border HorizontalAlignment="Left"
VerticalAlignment="Top"
Height="250"
CornerRadius="5">
<Border.Background>
<LinearGradientBrush StartPoint="0,0" EndPoint="0,1">
<GradientStop Offset="0" Color="Transparent"/>
<GradientStop Offset="1" Color="Transparent"/>
</LinearGradientBrush>
</Border.Background>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="*"/>
<RowDefinition Height="4*"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="400"/>
<ColumnDefinition Width="300"/>
<ColumnDefinition Width="*"/>
</Grid.ColumnDefinitions>
<TextBlock Grid.Row="0"
Grid.Column="0"
Margin="5,5,5,5"
HorizontalAlignment="Left"
FontSize="12"
FontWeight="Bold"
Foreground="Black"
Text="Select action to take">
</TextBlock>
<DataGrid Grid.Row="1" Grid.Column="0" Grid.ColumnSpan="2"
ItemsSource="{Binding SelectedItem.Funds, RelativeSource={RelativeSource AncestorType={x:Type DataGrid}}}"
RowStyle="{StaticResource DG_Row}"
ColumnHeaderStyle="{StaticResource DG_ColumnHeader}"
RowHeaderStyle="{StaticResource DG_RowHeaderNested}"
CellStyle="{StaticResource DG_Cell}"
Background="Silver"
HorizontalGridLinesBrush="LightGray"
VerticalGridLinesBrush="LightGray"
CanUserAddRows="False"
CanUserDeleteRows="False"
Margin="50,5,5,20"
AutoGenerateColumns="False">
<DataGrid.Columns>
<DataGridTextColumn Header="Fund Code" Binding="{Binding Code}" IsReadOnly="True" MinWidth="75"/>
<DataGridTextColumn Header="Fund Code SS" Binding="{Binding CodeSS}" IsReadOnly="True" MinWidth="75"/>
<DataGridTextColumn Header="Number of Rights" Binding="{Binding CurrentNominal, StringFormat={}{0:N0}}" IsReadOnly="True"/>
<DataGridTextColumn Header="Rights To Exercise" Binding="{Binding NewNominal, StringFormat={}{0:N0}}" IsReadOnly="True"/>
<DataGridCheckBoxColumn Header="Take Cash" Binding="{Binding OptionOne, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" IsReadOnly="False"/>
<DataGridCheckBoxColumn Header="Take Stock" Binding="{Binding OptionTwo, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" IsReadOnly="False"/>
<DataGridCheckBoxColumn Header="Take Both" Binding="{Binding OptionThree, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" IsReadOnly="False"/>
</DataGrid.Columns>
</DataGrid>
<Grid Grid.Column="2" Grid.Row="0" Grid.RowSpan="2">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="180"/>
<ColumnDefinition/>
<ColumnDefinition/>
<ColumnDefinition/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="*"/>
<RowDefinition Height="4*"/>
</Grid.RowDefinitions>
<StackPanel Grid.Row="1" Grid.Column="2" Margin="20,0,0,0">
<TextBlock Margin="0,5,5,5" HorizontalAlignment="Left" FontSize="12" FontWeight="Bold" Foreground="Black"
Text="Select Date Effective From"/>
<DatePicker HorizontalAlignment="Left" VerticalAlignment="Center" Margin="0,10,0,0"
BorderThickness="0" SelectedDate="{Binding SelectedItem.DateEffective, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" Width="200"/>
</StackPanel>
</Grid>
</Grid>
</Border>
</Grid>
</DataTemplate>
</DataGrid.RowDetailsTemplate>
<DataGrid.Columns>
<DataGridTextColumn Header="Date Entered" IsReadOnly="True" Binding="{Binding DateEntered, StringFormat={}\{0:dd-MMM-yy\}, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" MinWidth="75"/>
<DataGridTextColumn Header="Date Effective" IsReadOnly="True" Binding="{Binding DateEffective, StringFormat={}\{0:dd-MMM-yy\}, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" MinWidth="75"/>
<DataGridTextColumn Header="Sedol" IsReadOnly="True" Binding="{Binding Security.Sedol}" MinWidth="75"/>
<DataGridTextColumn Header="Name" IsReadOnly="True" Binding="{Binding Security.Name}" MinWidth="200"/>
<DataGridTextColumn Header="Ratio" IsReadOnly="True" Binding="{Binding RatioNew}" MinWidth="75"/>
</DataGrid.Columns>
</DataGrid>
答案 0 :(得分：2)
DatePicker的DataContext应该已经是SelectedItem，尝试将其更改为：
ItemsSource="{Binding SelectedItem.Funds, RelativeSource={RelativeSource AncestorType={x:Type DataGrid}}}"
此外，您的子DataGrid的ItemsSource可以简化为：
ItemsSource="{Binding Funds}"
要：
fixed