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我試圖從xaml實例化一個對象。該對象的類繼承自基類。除了基類屬性(「Key」)沒有從xaml正確設置以外,一切都很好。它始終爲空。該對象的屬性本身在xaml中設置爲OK。另外,當我從代碼中設置Key屬性時,它會設置好。從xaml創建對象時,基類屬性始終爲空
我在MainWindow方法的左括號上放置了一個斷點來查看對象數據。懸停細節告訴我,Key屬性始終爲空。
任何想法我做錯了什麼?
<?xml version="1.0" encoding="utf-8" ?>
<GroupUiItem xmlns="clr-namespace:Configurator.UiCore"
Key="key_grp1" UserName="grp1">
<ParameterUiItem Key="key_par1" UserName="par1"/>
<GroupUiItem Key="key_grp2" UserName="grp2">
<ParameterUiItem Key="key_par2" UserName="par2"/>
<ParameterUiItem Key="key_par3" UserName="par3"/>
</GroupUiItem>
<ParameterUiItem Key="key_par4" UserName="par4"/>
<ParameterUiItem Key="key_par5" UserName="par5"/>
<ParameterUiItem Key="key_par6" UserName="par6"/>
</GroupUiItem>
public partial class MainWindow : Window
{
public MainWindow()
{
GroupUiItem ConfigUi = new GroupUiItem();
InitializeComponent();
using (FileStream stream = new FileStream("XMLFile1.xaml", FileMode.Open, FileAccess.Read))
{
ConfigUi = XamlReader.Load(stream) as GroupUiItem;
}
ConfigUi.Key = "key_grp1"; // this works OK
CategoryList.ItemsSource = ConfigUi.Children;
}
}
// These are in the Configurator.UiCore namespace:
public class ConfiguratorUiItem
{
protected string _Key;
public string Key
{
get { return _Key; }
set { _Key = value; }
}
}
[ContentProperty("Children")]
public class GroupUiItem : ConfiguratorUiItem
{
private ObservableCollection<ConfiguratorUiItem> _Children = new ObservableCollection<ConfiguratorUiItem>();
public ObservableCollection<ConfiguratorUiItem> Children
{ get { return _Children; }
set { _Children = value; }
}
private string _UserName;
public string UserName
{ get { return _UserName; }
set { _UserName = value; }
}
}
public class ParameterUiItem : ConfiguratorUiItem
{
private string _ParameterType;
public string ParameterType
{
get { return _ParameterType; }
set { _ParameterType = value; }
}
private string _UserName;
public string UserName
{
get { return _UserName; }
set { _UserName = value; }
}
}