wpf ItemsControl ItemTemplate 绑定
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ItemsControl ItemTemplate Binding
提问by Wonko the Sane
In WPF4.0, I have a class that contains other class types as properties (combining multiple data types for display). Something like:
在 WPF4.0 中，我有一个包含其他类类型作为属性的类（组合多种数据类型进行显示）。就像是：
public partial class Owner
{
public string OwnerName { get; set; }
public int OwnerId { get; set; }
}
partial class ForDisplay
{
public Owner OwnerData { get; set; }
public int Credit { get; set; }
}
In my window, I have an ItemsControl with the following (clipped for clarity):
在我的窗口中，我有一个 ItemsControl，其中包含以下内容（为清晰起见进行了剪辑）：
<ItemsControl ItemsSource={Binding}>
<ItemsControl.ItemTemplate>
<DataTemplate>
<local:MyDisplayControl
OwnerName={Binding OwnerData.OwnerName}
Credit={Binding Credit} />
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
I then get a collection of display information from the data layer, and set the DataContextof the ItemsControlto this collection. The "Credit" property gets displayed correctly, but the OwnerName property does not. Instead, I get a binding error:
然后我得到的数据层显示信息的集合，并设置DataContext的ItemsControl这个集合。“Credit”属性正确显示，但 OwnerName 属性没有正确显示。相反，我收到一个绑定错误：
Error 40: BindingExpression path error: 'OwnerName' property not found on 'object' ''ForDisplay' (HashCode=449124874)'. BindingExpression:Path=OwnerName; DataItem='ForDisplay' (HashCode=449124874); target element is 'TextBlock' (Name=txtOwnerName'); target property is 'Text' (type 'String')
错误 40：BindingExpression 路径错误：在“对象”“ForDisplay”（HashCode=449124874）上找不到“OwnerName”属性。BindingExpression:Path=OwnerName; DataItem='ForDisplay' (HashCode=449124874); 目标元素是 'TextBlock' (Name=txtOwnerName'); 目标属性是“文本”（类型“字符串”）
I don't understand why this is attempting to look for the OwnerName property in the ForDisplay class, rather than in the Owner class from the ForDisplay OwnerData property.
我不明白为什么这会尝试在 ForDisplay 类中查找 OwnerName 属性，而不是在来自 ForDisplay OwnerData 属性的 Owner 类中。
EditIt appears that it has something to do with using the custom control. If I bind the same properties to a TextBlock, they work correctly.
编辑看来这与使用自定义控件有关。如果我将相同的属性绑定到 a TextBlock，它们会正常工作。
<ItemsControl ItemsSource={Binding}>
<ItemsControl.ItemTemplate>
<DataTemplate>
<StackPanel>
<local:MyDisplayControl
OwnerName={Binding OwnerData.OwnerName}
Credit={Binding Credit} />
<TextBlock Text="{Binding OwnerData.OwnerName}" />
<TextBlock Text="{Binding Credit}" />
</StackPanel>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
回答by decyclone
Are you sure the code you posted here IS the code you use in your solution? Because, this code works for me :
您确定您在此处发布的代码是您在解决方案中使用的代码吗？因为，这段代码对我有用：
XAML
XAML
<ItemsControl ItemsSource="{Binding}">
<ItemsControl.ItemTemplate>
<DataTemplate>
<StackPanel>
<TextBlock Text="{Binding OwnerData.OwnerName}"></TextBlock>
<TextBlock Text="{Binding Credit}" />
</StackPanel>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
Window's Loaded Event
窗口的加载事件
ObservableCollection<ForDisplay> items = new ObservableCollection<ForDisplay>();
for (int i = 0; i < 10; i++)
{
items.Add(new ForDisplay() { OwnerData = new Owner() { OwnerId = i + 1, OwnerName = String.Format("Owner #{0}", i + 1) }, Credit = i + 1 });
}
DataContext = items;
