我的问题在这里:我有一些课
public class Component
{
...
private ServiceController service;
...
public int ServiceStatus
{
get
{
switch(service.Status)
{
case ServiceControllerStatus.Stopped:
return 0;
case ServiceControllerStatus.Running:
return 1;
default:
return 2;
}
}
}
public void QueryService()
{
service.Refresh();
}
}
和组件的集合,在另一个类中声明:
public class Motivation
{
// Downloaded data
...
private ObservableCollection<Component> components;
public ObservableCollection<Component> Components
{
get { return components; }
}
public bool CheckServices()
{
bool changed = false;
foreach (Component C in components)
{
int prevStatus = C.ServiceStatus;
C.QueryService();
if (prevStatus != C.ServiceStatus)
changed = true;
}
return changed;
}
此组件列表显示在 WPF DataGrid 中。我的想法:运行服务的绿色背景色,红色 - 停止。工作正常,但仅在开始时。计时器调用 CheckServices(),如果返回值为 True,我想重新渲染我的网格,尊重新的服务状态。这是 XAML:
<Style x:Key="ServiceStateStyle" TargetType="z:DataGridRow">
<Setter Property="Background" Value="Gray" />
<Style.Triggers>
<DataTrigger Binding="{Binding Path=ServiceStatus}" Value="0">
<Setter Property="Background" Value="LightCoral" />
</DataTrigger>
<DataTrigger Binding="{Binding Path=ServiceStatus}" Value="1">
<Setter Property="Background" Value="LightGreen" />
</DataTrigger>
</Style.Triggers>
</Style>
<z:DataGrid Grid.Row="0"
Grid.ColumnSpan="4"
AutoGenerateColumns="False"
x:Name="DataGridComponents"
ItemContainerStyle="{DynamicResource ServiceStateStyle}">
<z:DataGrid.Columns>
<z:DataGridTextColumn IsReadOnly="True"
Header="Component" Width="80"
Binding="{Binding Path=DisplayName}"/>
</z:DataGrid.Columns>
</z:DataGrid>
我应该调用任何显式方法来使 DataGrid 无效吗?我尝试过使用 InvalidateProperty、InvalidateVisual、GetBindingExpression(ItemContainerStyleProperty).UpdateTarget(),但没有任何效果。任何人都可以帮忙吗?