WPF DataGrid：DataGridComboxBox ItemsSource绑定到集合集合 [英] WPF DataGrid: DataGridComboxBox ItemsSource Binding to a Collection of Collections
问题描述
我在XAML中创建了一个DataGrid，并将ItemsSource绑定到包含属性的某个类的ObservableCollection。然后在C＃中，我创建一个DataGridTextColumn和一个DataGridComboBoxColumn，并将其绑定到ObservableCollection内的对象的属性。我可以将DataGridComboBoxColumn绑定到一个简单的集合，但我想要做的是将其绑定到字符串集合的集合，以便DataGrid中的每一行ComboBox具有不同的字符串集合。我没有这样做...
I've created a DataGrid in XAML and the ItemsSource is binded to an ObservableCollection of a certain class that contains properties. Then in C#, I create a DataGridTextColumn and a DataGridComboBoxColumn and binded these to the properties of the objects inside the ObservableCollection. I can bind the DataGridComboBoxColumn to a simple Collection but what I want to do is bind it to a collection of collections of strings so that for each row the ComboBox inside the DataGrid has a different collection of string. I have failed to do so...
如何绑定DataGridCombBoxColumn，以便我可以为这种类型的列的每一行使用不同的字符串集合？
How can I bind the DataGridCombBoxColumn so that I can have a different collection of strings for each row of this type of column?
XAML：
<Window>
<!-- ... -->
WPFToolkit:DataGrid
x:Name="DG_Operations"
Margin="10,5,10,5"
Height="100"
HorizontalAlignment="Stretch"
FontWeight="Normal"
ItemsSource="{Binding Path=OperationsStats}"
AlternatingRowBackground="{DynamicResource SpecialColor}"
HorizontalScrollBarVisibility="Auto"
VerticalScrollBarVisibility="Visible"
SelectionMode="Extended"
CanUserAddRows="False"
CanUserDeleteRows="False"
CanUserResizeRows="True"
CanUserSortColumns="True"
AutoGenerateColumns="False"
IsReadOnly="False"
IsEnabled="True"
BorderThickness="1,1,1,1"
VerticalAlignment="Stretch"/>
<!-- ... -->
</Window>
C＃：
public class DataModelStatsOperations
{
public ObservableCollection<IStatsOperation> OperationsStats { get; set; }
}
public interface IStatsOperation
{
string Operation { get; set; }
Collection<string> Data{ get; set; }
}
public class StatsOperation : IStatsOperation
{
public StatsOperation(string operation, Collection<string> data)
{
Operation = operation;
Data = data;
}
public string Operation { get; set; }
public Collection<string> Data{ get; set; }
}
private ObservableCollection<IStatsOperation> dataOperations_ =
new ObservableCollection<IStatsOperation>();
//...
Binding items = new Binding();
PropertyPath path = new PropertyPath("Operation");
items.Path = path;
DG_Operations.Columns.Add(new DataGridTextColumn()
{
Header = "Operations",
Width = 133,
Binding = items
});
DG_Operations.Columns.Add(new DataGridComboBoxColumn()
{
Header = "Data",
Width = 190,
ItemsSource = /*???*/,
SelectedValueBinding = new Binding("Data"),
TextBinding = new Binding("Data")
});
dataOperations_.Add(new StatsOperation(CB_Operation.SelectedItem.ToString(),
dataCollection));
DG_Operations.DataContext = new DataModelStatsOperations
{
OperationsStats = dataOperations_
};
//...
任何帮助将不胜感激！
好的，所以在阅读了两个第一个答案后，我注意到了一些事情。我的约束力真的不对！现在，我想做的是类似于AndyG提出的内容：
Okay, so after reading the two first answers I noticed something. My binding is really not right! Now, what I want to do is something similar to what AndyG proposed:
DG_Operations.Columns.Add(new DataGridComboBoxColumn()
{
Header = "Data",
Width = 190,
ItemsSource = new Binding("Data"), //notice this here does not work (have a look at the following error)
SelectedValueBinding = new Binding("Operation"),
TextBinding = new Binding("Operation")
});
错误：无法将类型System.Windows.Data.Binding隐式转换为 System.Collections.IEnumerable'。
如何将ItemsSource绑定到数据？
How can the ItemsSource be bound to Data?
推荐答案
首先，这应该很容易...其次，你为什么在C＃中构建（和绑定）列？
Firstly, this should be easy... secondly, why are you building (and binding) columns in C#? Eek.
XAML （我正在使用普通网格，因为我很懒）：
XAML (I'm using a regular grid because I'm lazy):
<ListView Name="MyListView">
<ListView.View>
<GridView>
<GridView.Columns>
<GridViewColumn DisplayMemberBinding="{Binding Operation}" />
<GridViewColumn>
<GridViewColumn.CellTemplate>
<DataTemplate>
<ComboBox ItemsSource="{Binding Choices}" />
</DataTemplate>
</GridViewColumn.CellTemplate>
</GridViewColumn>
</GridView.Columns>
</GridView>
</ListView.View>
</ListView>
C＃：
void Window1_Loaded(object sender, RoutedEventArgs e)
{
var dahList = new List<StatsOperation>();
dahList.Add(new StatsOperation
{
Operation = "Op A",
Choices = new string[] { "One", "Two", "Three" },
});
dahList.Add(new StatsOperation
{
Operation = "Op B",
Choices = new string[] { "4", "5", "6" },
});
this.MyListView.ItemsSource = dahList;
}
结果
这篇关于WPF DataGrid：DataGridComboxBox ItemsSource绑定到集合集合的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
