Question

我很难排除这个错误，我收到了绑定对象的子属性。

输出日志：

System.Windows.Data Error: 40 : 
BindingExpression path error: 
'ModuleTitle' property not found on 'object' ''MainViewModel' (HashCode=20054924)'.
BindingExpression:Path=ModuleTitle; 
DataItem='MainViewModel' (HashCode=20054924); 
target element is 'Module' (Name=''); 
target property is 'Content' (type 'Object')

System.Windows.Data Error: 40 : 
BindingExpression path error: 
'HexColorValue' property not found on 'object' ''MainViewModel' (HashCode=20054924)'. 
BindingExpression:Path=HexColorValue; 
DataItem='MainViewModel' (HashCode=20054924); 
target element is 'Module' (Name=''); 
target property is 'Background' (type 'Brush')

System.Windows.Data Error: 40 : 
BindingExpression path error: 
'ImageSource' property not found on 'object' ''MainViewModel' (HashCode=20054924)'. 
BindingExpression:Path=ImageSource; 
DataItem='MainViewModel' (HashCode=20054924); 
target element is 'Module' (Name=''); 
target property is 'TileGlyph' (type 'ImageSource')

我的观点：

<UserControl definition ...>

<UserControl.DataContext>
    <ViewModels:MainViewModel/>
</UserControl.DataContext>

...


        <dxnav:TileBar x:Name="MainNavigation_TileBar" ScrollViewer.HorizontalScrollBarVisibility="Auto" ItemSpacing="3" ItemsSource="{Binding NavModules}">
            <dxnav:TileBar.ItemContainerStyle>
                <Style TargetType="dxnav:TileBarItem">
                    <Setter Property="Content" Value="{Binding ModuleTitle}"/>
                    <Setter Property="Width" Value="166"/>
                    <Setter Property="Background" Value="{Binding HexColorValue}"/>
                    <Setter Property="TileGlyph" Value="{Binding ImageSource}"/>
                </Style>
            </dxnav:TileBar.ItemContainerStyle>

...

查看型号：

public partial class MainViewModel
{
    public ObservableCollection<Module> NavModules { get { return Module.AvailableNavModules; } }

    public MainViewModel() 
    { 

    }
}

模块类（属性在构造函数中私有设置）：

public class Module : TileBarItem
{
    public string ModuleTitle { get; private set; }

    public string ImageSource { get; private set; }

    public string HexColorValue { get; private set; }

    public string ModuleGroup { get; private set; }

    public string ModuleView { get; private set; }

    public static readonly ObservableCollection<Module> AvailableNavModules = new ObservableCollection<Module>()
    {
        new Module("Search", "/Resources/Icons/Modules/Search.png", ModuleColor.AQUA, _RECORD_GROUP, "SearchPageView"),
        new Module("Record Keeping", "/Resources/Icons/Modules/RecordKeeping.png", ModuleColor.BLACK, _RECORD_GROUP, "RecordKeepingView"),
        new Module("Scheduling", "/Resources/Icons/Modules/Scheduling.png", ModuleColor.ORANGE, _SCHEDULING_GROUP, "SchedulingView"),
        new Module("Management", "/Resources/Icons/Modules/Management.png", ModuleColor.BLUE, _MANAGEMENT_GROUP, "ManagementView")
    };

所有属性都是使用简单的{ get; set; }实现设置的，就像我在项目的其他地方所做的那样。它只是不适合这种特定用途。加载程序时，它会正确加载对象NavModules，但没有设置任何子属性进行显示。

以前，我忘记将{ get; set; }添加到ObservableCollection<Module> NavModules，但现在我无法找到子属性。

建议？

Answer 1

问题是我Module派生TileBarItem所以道路没有按预期运作。

新课程声明：

public class Module
{
    public string ModuleTitle { get; private set; }
    public string ImageSource { get; private set; }

    ....
}

4.0 WPF中的子属性的数据绑定错误40

1 个答案: