C# UserControl和嵌套DataGrid上的依赖项属性
我有这样一个用户控件: DataContext为null,我将ListView ItemsSource设置为IEnumerable of PersonsC# UserControl和嵌套DataGrid上的依赖项属性,c#,wpf,datagrid,user-controls,C#,Wpf,Datagrid,User Controls,我有这样一个用户控件: DataContext为null,我将ListView ItemsSource设置为IEnumerable of Persons public class Persons { public int ID { get; set; } public string Name { get; set; } public string Address { get; set; } public List<Persons> Contacts
public class Persons
{
public int ID { get; set; }
public string Name { get; set; }
public string Address { get; set; }
public List<Persons> Contacts { get; set; }
}
System.Windows.Data错误:4:找不到与绑定的源
参考“相对资源查找器”,
AncestorType='System.Windows.Controls.UserControl',
AncestorLevel='1'。BindingExpression:Path=ShowAddress;DataItem=null;
目标元素是“DataGridTextColumn”(HashCode=55248170);目标
属性为“可见性”(类型为“可见性”)
也许可以使用资源usercontrol来完成,但是datagrid对usercontrol中定义的资源没有作用域
注意:BoolToVisible是一个转换器,用于将“真”转换为“可见”,将“假”转换为“折叠” 相对资源扩展不适用于DataGridTextColumn(或任何其他DataGridColumn),因为此列不是逻辑树的一部分。您可以执行一些变通操作,例如:
<UserControl x:Class="Test31990722.Contacts"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:local="clr-namespace:Test31990722"
mc:Ignorable="d"
d:DesignHeight="300" d:DesignWidth="300"
Name="uc">
<UserControl.Resources>
<local:BoolToVisible x:Key="BoolToVisible" />
</UserControl.Resources>
<ListView Name="lv">
<ListView.ItemTemplate>
<DataTemplate>
<DataGrid ItemsSource="{Binding Contacts}" AutoGenerateColumns="False"
Tag="{Binding ShowAddress, ElementName=uc,Converter={StaticResource BoolToVisible}}">
<DataGrid.Resources>
<TextBlock x:Key="FileNameColHeader" Text="Address" Tag="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType=DataGrid}, Path=Tag}"/>
</DataGrid.Resources>
<DataGrid.Columns>
<DataGridTextColumn Binding="{Binding Name}"/>
<DataGridTextColumn Binding="{Binding Address}" Header="{StaticResource FileNameColHeader}"
Visibility="{Binding Tag, Source={StaticResource FileNameColHeader}}"/>
</DataGrid.Columns>
</DataGrid>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
</UserControl>
希望有帮助如果存在,请分享您的ShowAddress声明和DataContext设置。我编辑这个问题。这是什么?listviewDataTemplate中列出的每个人的“联系人”绑定没有ItemSource或ItemsSource属性。也许,ItemsSource与ListView相关?
public class Persons
{
public int ID { get; set; }
public string Name { get; set; }
public string Address { get; set; }
public List<Persons> Contacts { get; set; }
}
{Binding Path=ShowAddress, Converter={StaticResource BoolToVisible}, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type UserControl}}}
<UserControl x:Class="Test31990722.Contacts"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:local="clr-namespace:Test31990722"
mc:Ignorable="d"
d:DesignHeight="300" d:DesignWidth="300"
Name="uc">
<UserControl.Resources>
<local:BoolToVisible x:Key="BoolToVisible" />
</UserControl.Resources>
<ListView Name="lv">
<ListView.ItemTemplate>
<DataTemplate>
<DataGrid ItemsSource="{Binding Contacts}" AutoGenerateColumns="False"
Tag="{Binding ShowAddress, ElementName=uc,Converter={StaticResource BoolToVisible}}">
<DataGrid.Resources>
<TextBlock x:Key="FileNameColHeader" Text="Address" Tag="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType=DataGrid}, Path=Tag}"/>
</DataGrid.Resources>
<DataGrid.Columns>
<DataGridTextColumn Binding="{Binding Name}"/>
<DataGridTextColumn Binding="{Binding Address}" Header="{StaticResource FileNameColHeader}"
Visibility="{Binding Tag, Source={StaticResource FileNameColHeader}}"/>
</DataGrid.Columns>
</DataGrid>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
</UserControl>