由于我的问题相当罕见，而且我没有一个线索可能导致它，我将尝试包含可能与它有关的每个代码，剥离到基本要素以避免不必要的混乱。 / p>
基本上，我有一个TabControl，其TabItems个Content个人UserControl是自定义的<UserControl>
<Grid>
<Grid.RowDefinitions>
<RowDefinition />
<RowDefinition />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition />
<ColumnDefinition />
</Grid.ColumnDefinition>
<ScrollViewer Height="Auto" HorizontalAlignment="Stretch" Margin="0" Name="scrollViewer11" VerticalAlignment="Stretch" Width="Auto" HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto"></ScrollViewer>
<ScrollViewer Grid.Column="1" Height="Auto" Name="scrollViewer12" Width="Auto" Margin="0" VerticalScrollBarVisibility="Auto" HorizontalScrollBarVisibility="Auto"></ScrollViewer>
<ScrollViewer Grid.Row="1" Height="Auto" Name="scrollViewer21" Width="Auto" Margin="0" HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto"></ScrollViewer>
<ScrollViewer Grid.Row="1" Grid.Column="1" Height="Auto" Name="scrollViewer22" Width="Auto" Margin="0" HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto"></ScrollViewer>
</Grid>
</UserControl>
。
这些控件具有以下形式：
ScrollViewer行数和列数取决于所使用的控件，范围从1x1网格中的单个单元格到3x2网格中的6个单元格（每个网格都与WriteableBitmap相对应）。
现在我的实际C＃代码。对于每个单元格，用户可以添加public partial class MainWindow : Window
{
List<WorkSpace> WorkSpaceList = new List<WorkSpace>();
private WorkSpace currentSpace = null;
//one of the methods that adds to the TabControl, here a 2x2 grid:
private void NewWorkspaceFour(WorkSpace ws)
{
WorkSpaceFour workSpaceFour = new WorkSpaceFour();
for (int i = 0; i < 4; i++)
{
WorkPlace wp = new WorkPlace();
ws.workPlaceList.Add(wp);
switch (i)
{
case 0:
workSpaceFour.scrollViewer11.Content = wp.grid;
break;
case 1:
workSpaceFour.scrollViewer12.Content = wp.grid;
break;
case 2:
workSpaceFour.scrollViewer21.Content = wp.grid;
break;
case 3:
workSpaceFour.scrollViewer22.Content = wp.grid;
break;
}
}
ws.tabItem.Content = workSpace;
tabControlImages.Items.Add(ws.tabItem);
}
//triggered in UI e.g. by moving a Slider
private void NewSettings(object sender, RoutedPropertyChangedEventArgs<double> e)
{
currentSpace.NewSettings((float)(e.NewValue));
}
}
internal class WorkSpace
{
internal delegate void NewSettingHandler(float e);
internal List<WorkPlace> workPlaceList = new List<WorkPlace>();
internal TabItem tabItem = new TabItem();
internal WorkPlace currentPlace = null;
internal NewSettingsHandler NewSettings;
internal WorkSpace()
{
NewSettings += ChangeSettings;
}
internal void ChangeSettings(float newValue)
{
//do something small with newValue
currentPlace.RecalculateImage();
}
//...more methods that would use "newValue" in a different way, thus the delegate
}
internal class WorkPlace
{
internal WriteableBitmap bitmap;
internal Image image = new Image {//settings};
internal Grid grid = new Grid {//settings};
internal Grid gridImage = new Grid {//settings};
internal WorkPlace()
{
grid.Children.Add(gridImage);
gridImage.Children.Add(image);
}
internal void RecalculateImage()
{
//some rather long calculations...
bitmap.WritePixels(...,...,...,...);
image.Source = bitmap;
}
}
，其中代码的组织如下：
currentSpace通过该程序，用户可以更改标签以更改currentPlace并单击单元格以更改相应的currentSpace = space，只需更改引用即space，其中{{1} }}指的是包含新选定WorkSpace的{{1}}。
现在问题如下。当一个选项卡包含一个带有图像的简单1x1网格并移动滑块时，它会非常流畅地运行。当标签包含3x2网格且此网格中只有一个单元格包含TabItem而WorkPlace不是bitmap时，它的工作方式相同。但是，当3x2网格完全被“绘制”null填充并且移动滑块时，即使只重新计算了重绘的6个图像中的一个，也会出现明显的延迟。我不明白为什么会这样。它可能与渲染或对象引用有关，但我不知道C＃是否足以在此处查看和发布。
希望代码不会太长（我已经尽可能地删除它）并且足够清楚。如果没有，请说出来，我会更新/添加它。在该程序的先前版本中，UI基本相同，但重新计算的图像却完全不同，但我永远无法观察到这个问题。