我有一个ContentControl,其内容由DataTemplateSelector根据属性Workspace确定。但是当数据模板发生变化时,我必须根据ContentControl的初始大小和整个窗口进行一些计算,所以我想知道它何时加载。我如何知道ContentControl的内容在更改时何时加载
<ContentControl Content="{Binding Path=Workspace}" ContentTemplateSelector="{StaticResource workspaceTemplateSelector}" />
的ResourceDictionary:
<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:vw="clr-namespace:Capgemini.Sag.KeyEm.View">
<DataTemplate x:Key="keyboardTemplate" >
<vw:Keyboard/>
</DataTemplate>
<DataTemplate x:Key="welcomeTemplate">
<vw:Welcome/>
</DataTemplate>
<vw:WorkspaceTemplateSelector
KeyboardTemplate="{StaticResource keyboardTemplate}"
WelcomeTemplate="{StaticResource welcomeTemplate}"
x:Key="workspaceTemplateSelector"/>
</ResourceDictionary>
DataTemplateSelector:
你可以做using Capgemini.Sag.KeyEm.ViewModel.Interfaces;
namespace Capgemini.Sag.KeyEm.View
{
using System.Windows;
using System.Windows.Controls;
class WorkspaceTemplateSelector : DataTemplateSelector
{
public DataTemplate WelcomeTemplate { get; set; }
public DataTemplate KeyboardTemplate { get; set; }
public override DataTemplate SelectTemplate(object item, DependencyObject container)
{
if (item is IWelcomeViewModel)
return WelcomeTemplate;
if (item is IKeyboardViewModel)
return KeyboardTemplate;
return null;
}
}
}
处理此问题的正确方法是回答自己的问题,然后几天后选择该问题作为正确答案。 – Will 2011-01-25 14:03:06