private async void RemovePageTask(int pageId, TaskInfo taskInfo)
{
DispatcherContainer target = (DispatcherContainer)contentStackPanel.Children[pageId];
Console.WriteLine("移除页面：" + pageId + "___ThreadId：" + Thread.CurrentThread.ManagedThreadId);
UIElement uiElement = target.Child;
uiElement = null;
target.SetValue(ContentPresenter.ContentProperty, null);
await target.SetChildAsync <Border>(() =>
{
Console.WriteLine("移除页面await：" + pageId + "___ThreadId：" + Thread.CurrentThread.ManagedThreadId);
return(new Border());
}
, () =>
{
Border bd = new Border();
pageQueueList[pageId].list.Remove(taskInfo);
if (pageQueueList[pageId].list.Count > 0)
{
RemovePageTask(pageId, pageQueueList[pageId].list[0]);
}
return(bd);
});
}
private async void LoadPageTask(int pageId, TaskInfo taskInfo)
{
DispatcherContainer target = (DispatcherContainer)contentStackPanel.Children[pageId];
// if (target.Child != null && target.Child is FixedPage) return;
// if (target.GetIsUpdatingChild()) return;
// Console.WriteLine("获取页面：" + pageId);
Console.WriteLine("获取页面：" + pageId + "___ThreadId：" + Thread.CurrentThread.ManagedThreadId);
//await 回调，执行下一个
await target.SetChildAsync <FixedPage>(() =>
{
FixedPage fp = new FixedPage();
try
{
XpsDocument xpsDoc = new XpsDocument(wordFullPath, FileAccess.Read);
FixedDocumentSequence fixedDocumentSequence = xpsDoc.GetFixedDocumentSequence();
foreach (DocumentReference DocRef in fixedDocumentSequence.References)
{
Console.WriteLine("获取页面await：" + pageId + "___ThreadId：" + Thread.CurrentThread.ManagedThreadId);
Console.WriteLine();
bool bForceReload = false;
FixedDocument DocFd = DocRef.GetDocument(bForceReload);
PageContent pageContent = DocFd.Pages[pageId];
fp = pageContent.GetPageRoot(false);
// pageContent.SetValue(ContentPresenter.ContentProperty, null);
//for (int i = 0; i < fixedPage.Children.Count; i++)
//{
// UIElement uiElement = fp.Children[i];
// fixedPage.Children.Remove(uiElement);
// fp.Children.Add(uiElement);
//}
}
// xpsDoc.Close();//这个地方需要注意关闭，否则的话会出现莫名其妙的错误
return(fp);
}
catch (Exception)
{
return(fp);
}
}
, () =>
{
FixedPage fp = new FixedPage();
pageQueueList[pageId].list.Remove(taskInfo);
if (pageQueueList[pageId].list.Count > 0)
{
LoadPageTask(pageId, pageQueueList[pageId].list[0]);
}
return(fp);
});
// Console.WriteLine("任务是否完成："+task.IsCompleted);
}