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我的问题是在这里: 我有一些类WPF Datagrid的不尊重项目属性值的变化
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();
}
}
和收集组件,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;
}
该组件列表中显示的在WPF DataGrid中。我的想法:用于运行服务的绿色背景颜色,红色 - 用于停止。工作正常,但只在开始。由定时器调用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。这里是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>
我应该调用显式的任何方法使DataGrid无效?我尝试过使用InvalidateProperty,InvalidateVisual,GetBindingExpression(ItemContainerStyleProperty).UpdateTarget(),但没有任何工作。谁能帮忙?
它的工作!非常简单。谢谢。 – Pavel 2009-12-18 08:08:04