wpf tabControl/tabitem 刷新困难
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Difficulty with tabControl/tabitem refresh
提问by Patrick
I have a WPF window with a maintabWindow and several tabitems. It normally works fine and the layout is this:
我有一个带有 maintabWindow 和几个 tabitems 的 WPF 窗口。它通常工作正常，布局是这样的：
but when I BEFORE add the following window:
但是当我之前添加以下窗口时：
the result is this:
结果是这样的：
So the problem is related with the tabControl/tabItem refresh. This is fairly obvious but even more because if I move the window or pass with the mouse on the a tabItem they get refreshed one by one.
所以问题与tabControl/tabItem刷新有关。这是相当明显的，但更重要的是，如果我移动窗口或在 tabItem 上用鼠标传递，它们会被一个一个地刷新。
I searched and found that here is a solution: http://geekswithblogs.net/NewThingsILearned/archive/2008/08/25/refresh--update-wpf-controls.aspx
我搜索并发现这里有一个解决方案：http: //geekswithblogs.net/NewThingsILearned/archive/2008/08/25/refresh--update-wpf-controls.aspx
so I added:
所以我补充说：
this.MainTab.Refresh();
this.tabItem1.Refresh();
this.tabItem2.Refresh();
this.tabItem3.Refresh();
this.tabItem4.Refresh();
this.tabItem5.Refresh();
but that didn't change a thing.
但这并没有改变任何事情。
Thanx for any help
感谢任何帮助
回答by Patrick
Ok so in the end it has a quite a weird behavious. If I do
好吧，最后它有一个非常奇怪的行为。如果我做
for (int i = 0; i < tbcMain.Items.Count; i++)
{
tbcMain.SelectedIndex = i;
tbcMain.UpdateLayout();
}
it works. But I have to set the 1st tabitem so if I add
有用。但是我必须设置第一个 tabitem 所以如果我添加
tbcMain.SelectedIndex = 0;
it doesn't. So the solution was put a sleep and it works again.
它没有。所以解决方案是休眠，它再次起作用。
for (int i = 0; i < tbcMain.Items.Count; i++)
{
tbcMain.SelectedIndex = i;
tbcMain.UpdateLayout();
}
System.Threading.Thread.Sleep(250);
tbcMain.SelectedIndex = 0;
But that is not elegant at all. If anyone has a better solution pls let me know it. Btw adding the tbcMain.SelectedIndex = 0; on the loaded event of the mainWindow is of no use.
但这一点都不优雅。如果有人有更好的解决方案，请告诉我。顺便说一句，添加 tbcMain.SelectedIndex = 0; 在 mainWindow 的加载事件上是没有用的。
回答by vapcguy
You should be able to set your SelectedIndex first, and without having to include it in your loop:
您应该能够首先设置 SelectedIndex，而不必将其包含在循环中：
tbcMain.SelectedIndex = 0;
Then, basing it off of your response, you should be able to either just do .UpdateLayout()on each of your TabItems:
然后，根据您的响应，您应该可以只.UpdateLayout()对每个 TabItem 执行以下操作：
MainTab.UpdateLayout();
tabItem1.UpdateLayout();
tabItem2.UpdateLayout();
tabItem3.UpdateLayout();
tabItem4.UpdateLayout();
tabItem5.UpdateLayout();
Or you should be able to do something like this in your loop:
或者你应该能够在你的循环中做这样的事情：
MainTab.UpdateLayout();
for (int i = 0; i < tbcMain.Items.Count; i++)
{
TabItem tbi = (TabItem)this.FindControl("tabItem"+i);
tbi.UpdateLayout();
}
Updating/refreshing should have nothing to do with setting the selected one. Including the selection of the tab within the loop to iwas your problem - not a race condition. Set the tbcMain.SelectedIndex = 0outside of your loop and you should be fine. Sometimes, however, this doesn't work and you need to set it with Dispatcher:
更新/刷新应该与设置选定的无关。在循环中包括选项卡的选择i是您的问题 - 不是竞争条件。设置tbcMain.SelectedIndex = 0循环的外部，你应该没问题。但是，有时这不起作用，您需要将其设置为Dispatcher：
Dispatcher.BeginInvoke((Action)(() => this.tbcMain.SelectedIndex = 0));
There's a write up/comments on a separate thread regarding why it needs to be sent to Dispatcher:
在一个单独的线程上有一篇关于为什么需要发送到的文章/评论Dispatcher：
How to programmatically select a TabItem in WPF TabControl
如何在 WPF TabControl 中以编程方式选择 TabItem
Though, unfortunately for me, I had a similar issue where I was trying to refresh a ListView on a subtab. Neither .UpdateLayout(), nor .InvalidateVisual()(as I saw on this thread) worked. I just had to rebind my grid in the button event I was using on my main page, so that when the tab was clicked, it was refreshed manually. I added an x:Nameproperty on the tab so I could call it using "dot" syntax, and it exposed the ListView. I simply added the DataTable of results back to that ListView's DataContext.
但是，不幸的是，我遇到了类似的问题，我试图刷新子选项卡上的 ListView。都没有.UpdateLayout()，也没有.InvalidateVisual()（正如我在这个线程上看到的）工作。我只需要在我在主页上使用的按钮事件中重新绑定我的网格，以便在单击选项卡时手动刷新它。我x:Name在选项卡上添加了一个属性，以便我可以使用“点”语法调用它，并且它公开了 ListView。我只是将结果的 DataTable 添加回 ListView 的 DataContext。
