将 Silverlight TabControl 绑定到集合
我的 ViewModel 中有一个模型对象集合。我希望能够将 TabControl 绑定到这些控件并使用 DataTemplate 从模型对象中提取信息。当我尝试执行此操作时,出现错误消息:无法将 Model 类型的对象转换为 TabItem 类型的对象。花了一些时间寻找解决方案后,我发现了以下内容:
Silverlight TabControl 是 破碎的。使用ListBox的组合 和 ContentControl 来模仿 TabControl 的行为。 (方法 我必须给 ListBox 换肤 看起来像 TabControl)
TabControl 不会覆盖 PrepareContainerForItemOverride 和 解决方案是制作一个 转换器。 (不太好,因为我 然后需要指定的类型 转换器中的被转换者)
有人知道更好的解决方案吗?
XAML
<sdk:TabControl ItemsSource="{Binding Items, ElementName=MyControl}">
<sdk:TabControl.ItemTemplate>
<DataTemplate>
<TextBlock Text="{Binding Name}" />
</DataTemplate>
</sdk:TabControl.ItemTemplate>
</sdk:TabControl>
C#
public ObservableCollection<Model> Items { get; set; }
public ViewModel()
Items = new ObservableCollection<Model>{
new Model { Name = "1"},
new Model { Name = "2"},
new Model { Name = "3"},
new Model { Name = "4"}
};
}
public class TabConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
List<TabSource> source = value as List<TabSource>;
if (source != null)
{
List<TabItem> result = new List<TabItem>();
foreach (TabSource tab in source)
{
result.Add(new TabItem()
{
Header = tab.Header,
Content = tab.Content
});
}
return result;
}
return null;
}
public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
throw new NotImplementedException();
}
}
I have a Collection of Model-objects in my ViewModel. I would like to be able to bind a TabControl to these and use a DataTemplate to extract the information from the Model-objects. When I try to do this I get the errormessage: Unable to cast object of type Model to object of type TabItem. After spending some time looking for a solution I found the following:
The Silverlight TabControl is
broken. Use a combination of ListBox
and ContentControl to mimic the
behaviour of a TabControl. (Means
that I have to skin the ListBox to
look like a TabControl)TabControl does not override
PrepareContainerForItemOverride and
the solution is to make a
Converter. (Not so good because I
then need to specify the type of the
convertee in the Converter)
Anyone know any better solution?
XAML
<sdk:TabControl ItemsSource="{Binding Items, ElementName=MyControl}">
<sdk:TabControl.ItemTemplate>
<DataTemplate>
<TextBlock Text="{Binding Name}" />
</DataTemplate>
</sdk:TabControl.ItemTemplate>
</sdk:TabControl>
C#
public ObservableCollection<Model> Items { get; set; }
public ViewModel()
Items = new ObservableCollection<Model>{
new Model { Name = "1"},
new Model { Name = "2"},
new Model { Name = "3"},
new Model { Name = "4"}
};
}
public class TabConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
List<TabSource> source = value as List<TabSource>;
if (source != null)
{
List<TabItem> result = new List<TabItem>();
foreach (TabSource tab in source)
{
result.Add(new TabItem()
{
Header = tab.Header,
Content = tab.Content
});
}
return result;
}
return null;
}
public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
throw new NotImplementedException();
}
}
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创建转换器
创建ControlTemplate:
并绑定convert,controltemplate
取自博客绑定选项卡控件
Create converter
Create ControlTemplate:
And binding convert, controltemplate
taken from the blog binding-tabcontrol