我一直在搜索出现在输出窗口中的这个错误的小时数。我对WPF中的绑定非常陌生,所以我确信有一些我错过了。BindingExpression path path error:property'not'on'object'
错误的全文(有一个每一个绑定路径,都与此类似):
System.Windows.Data Error: 39 : BindingExpression path error: 'TestItem' property not found on 'object' ''String' (HashCode=-842352750)'. BindingExpression:Path=TestItem; DataItem='String' (HashCode=-842352750); target element is 'TextBlock' (Name=''); target property is 'Text' (type 'String')
编辑:一切似乎工作,因为它应该,但我得到了这些错误输出窗口。
XAML:背后
<UserControl>
<UserControl.Resources>
<c:MyData x:Key="myDataSource"/>
<DataTemplate x:Key="image">
<Image x:Name="TheImage" />
<DataTemplate.Triggers>
<DataTrigger Binding="{Binding Path=PassFail}" Value="PASS">
<Setter TargetName="TheImage" Property="Source" Value="Images/accept.png" />
</DataTrigger>
<DataTrigger Binding="{Binding Path=PassFail}" Value="FAIL">
<Setter TargetName="TheImage" Property="Source" Value="Images/delete.png" />
</DataTrigger>
<DataTrigger Binding="{Binding Path=PassFail}" Value="WARNING">
<Setter TargetName="TheImage" Property="Source" Value="Images/warning.png" />
</DataTrigger>
</DataTemplate.Triggers>
</DataTemplate>
<Storyboard x:Key="OnMouseLeftButtonDown1"/>
</UserControl.Resources>
<UserControl.DataContext>
<Binding Source="{StaticResource myDataSource}"/>
</UserControl.DataContext>
<ListView Margin="0,94,-4,-7" x:Name="lsvwOutput" ItemsSource="{Binding Source={StaticResource myDataSource}}" MouseUp="lsvwOutput_MouseUp" FontFamily="Verdana">
<ListView.View>
<GridView>
<GridViewColumn Header="Test Item" Width="300" DisplayMemberBinding="{Binding Path=TestItem}" />
<GridViewColumn Header="Information" Width="0" DisplayMemberBinding="{Binding Path=Information}"/>
<GridViewColumn Header="Result" Width="0" DisplayMemberBinding="{Binding Path=PassFail}"/>
<GridViewColumn Header="Result" CellTemplate="{StaticResource image}" />
</GridView>
</ListView.View>
</ListView
</UserControl>
代码:
public class MyData : INotifyPropertyChanged
{
private string _testitem = "";
private string _information = "";
private string _passfail = "";
public string TestItem {
get { return _testitem; }
set
{
_testitem = value;
OnPropertyChanged("TestItem");
}
}
public string Information {
get { return _information; }
set
{
_information = value;
OnPropertyChanged("Information");
}
}
public string PassFail {
get { return _passfail; }
set
{
_passfail = value;
OnPropertyChanged("PassFail");
}
}
public string Text { get; set; }
为什么你将一个不可枚举的对象设置为ItemsSource? – Landern 2011-03-21 19:02:34
@Moses我已经改变了我的ItemsSource几次,看着不同的例子。我没有很好的理解什么应该去那里。我提出的代码是我尝试过的最后一次迭代,不一定是我原本想做的。 – isorfir 2011-03-21 19:18:35