[英]How do I bind a DataGridViewComboBoxColumn to a property/method of an object that returns a list?
[英]How do I bind to a property of an object under a collection of collections?
我有一个ObservableCollection
包含name属性和另一个列表的类(顶层)的ObservableCollection
具有只是一个名称属性类(BottomLevel)的。 最高列表上的绑定有效,但是当我尝试绑定到BottomList上的属性时,我什么也没得到。 我在这里想念什么?
XAML:
<Window x:Class="WpfApplication7.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525">
<Grid x:Name="myGrid" DataContext="topList">
<Border BorderBrush="AliceBlue" Grid.Column="0" BorderThickness="5">
<ItemsControl x:Name="ic1">
<ItemsControl.ItemTemplate>
<DataTemplate>
<StackPanel>
<Label Content="{Binding Path=TopName}"/>
<Border BorderBrush="AntiqueWhite" Grid.Column="1" BorderThickness="5">
<Button Content="{Binding Path=BottomList.BottomName}"/>
</Border>
</StackPanel>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
</Border>
</Grid>
后面的代码:
public partial class MainWindow : Window
{
public ObservableCollection<TopLevel> topList;
public MainWindow()
{
InitializeComponent();
topList = new ObservableCollection<TopLevel>();
topList.Add(new TopLevel("T" + (1 + topList.Count).ToString()));
topList[0].AddBottom();
topList.Add(new TopLevel("T" + (1 + topList.Count).ToString()));
topList[1].AddBottom();
ic1.ItemsSource = topList;
}
}
public class TopLevel
{
private ObservableCollection<BottomLevel> bottomList;
private string topName;
public void AddBottom()
{
bottomList.Add(new BottomLevel("B" + (1 + bottomList.Count).ToString()));
}
public TopLevel(string x)
{
bottomList = new ObservableCollection<BottomLevel>();
topName = x;
}
public string TopName
{
get
{
return topName;
}
set
{
if (topName!=value)
{
topName = value;
}
}
}
public ObservableCollection<BottomLevel> BottomList
{
get
{
return bottomList;
}
set
{
if (bottomList!=value)
{
bottomList = value;
}
}
}
}
public class BottomLevel
{
private string bottomName;
public BottomLevel(string x)
{
bottomName = x;
}
public string BottomName
{
get
{
return bottomName;
}
set
{
if (bottomName!=value)
{
bottomName = value;
}
}
}
}
您的按钮路径不正确。 BottomList没有“名称”属性,因此您无法绑定到它。 相反,只需使用BottomName
作为路径。
由于您的topList
具有“ topList
的集合,因此您需要某种嵌套项控件来迭代“ bottomList”集合(然后如上使用“ BottomName”作为路径)。
就目前而言,您基本上有:
<ItemsControl //List of TopLevel>
//Your data context is now the TopLevel item itself
<Button Path=/> //What goes here? you have a whole collection of BottomLevel items to choose from!
</ItemsControl>
如果BottomList中只有一项,则可以对Button使用以下代码
<Button Content="{Binding Path=BottomList[0].BottomName}" Height="50"/>
如果要将BottomList绑定到某些列表控件,则可以绑定到DataGrid,然后可以使用以下代码。
<Grid x:Name="myGrid" DataContext="topList">
<Border BorderBrush="AliceBlue" Grid.Column="0" BorderThickness="5">
<ItemsControl x:Name="ic1">
<ItemsControl.ItemTemplate>
<DataTemplate>
<StackPanel>
<Label Content="{Binding Path=TopName}"/>
<Border BorderBrush="AntiqueWhite" Grid.Column="1" BorderThickness="5">
<DataGrid ItemsSource="{Binding Path=BottomList}" AutoGenerateColumns="False">
<DataGrid.Columns>
<DataGridTemplateColumn>
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<Button Content="{Binding Path=BottomName}" Height="50"/>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>
</DataGrid.Columns>
</DataGrid>
</Border>
</StackPanel>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
</Border>
</Grid>
如果您需要更多帮助,请告诉我。
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