blocks|key|816282|text|尝试：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|816283|if+(stackPanelAdd.Children.Count>0)
{
++stackPanelAdd.Children.RemoveAt(stackPanelAdd.Children.Count-1);
}|code-block|syntax|javascript|816284|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Try:

<pre><code>if (stackPanelAdd.Children.Count&gt;0)
{
 stackPanelAdd.Children.RemoveAt(stackPanelAdd.Children.Count-1);
}
</code></pre>

blocks|key|639404|text|您可以使用|type|unstyled|depth|inlineStyleRanges|entityRanges|data|639405|var+lastControl+=+stackPanelAdd.Children.LastOrDefault();+
//Last+is+defined+in+System.Linq.Enumrable
if(lastControl+!=+null)
++++stackPanelAdd.Children.Remove(lastControl);|code-block|syntax|javascript|639406|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

You can use 

<pre><code>var lastControl = stackPanelAdd.Children.LastOrDefault(); 
//Last is defined in System.Linq.Enumrable
if(lastControl != null)
 stackPanelAdd.Children.Remove(lastControl);
</code></pre>

blocks|key|4853304|text|这不是一个好主意，如果你坚持这种方法，事情迟早会变得非常混乱。在处理可以在WPF中添加和删除的项时，您需要在面板上使用某种类型的ItemsControl+(您可以使用ItemsPanel属性更改面板，默认情况下它将是一个StackPanel)。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4853305|还可以通过使用data+templates和data+binding来改进控件的创建，这是您应该熟悉的核心机制。|4853306|举个例子：|4853307|<ItemsControl+ItemsSource="{Binding+Data}">
++++<ItemsControl.ItemTemplate>
++++++++<DataTemplate>
++++++++++++<StackPanel>
++++++++++++++++<TextBox+Text="{Binding+Name}"+Margin="5,5,5,0"/>
++++++++++++++++<ListBox+ItemsSource="{Binding+Items}"+Margin="5,5,5,0"+Height="200"/>
++++++++++++</StackPanel>
++++++++</DataTemplate>
++++</ItemsControl.ItemTemplate>
</ItemsControl>|code-block|syntax|javascript|4853308|这里的Data是一个源集合，它应该实现INotifyCollectionChanged，然后你只需从该集合中移除一个项目，它对应的StackPanel就会消失。Data中的项应该包含绑定的属性Name和Items，然后您可以为它们赋值或从中获取输入的文本(该类应该实现INPC，请阅读article+on+data+binding中有关这些内容的更多信息)。|4853309|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/system.windows.controls.itemscontrol.aspx|1|http://msdn.microsoft.com/en-us/library/system.windows.controls.itemscontrol.itemspanel.aspx|2|http://msdn.microsoft.com/en-us/library/ms742521.aspx|3|http://msdn.microsoft.com/en-us/library/ms752347.aspx|4|http://msdn.microsoft.com/en-us/library/system.collections.specialized.inotifycollectionchanged.aspx|5|http://msdn.microsoft.com/en-us/library/system.componentmodel.inotifypropertychanged.aspx|6^0|1S|C|2B|A|32|A|1S|C|0|2B|A|1|0|7|E|2|M|C|3|0|0|0|3|4|J|O|28|4|2O|4|2T|5|3Q|4|J|O|4|3Q|4|5|3Y|N|6|0^^$0|@$1|2|3|4|5|6|7|19|8|@$9|1A|A|1B|B|C]|$9|1C|A|1D|B|C]|$9|1E|A|1F|B|C]]|D|@$9|1G|A|1H|1|1I]|$9|1J|A|1K|1|1L]]|E|$]]|$1|F|3|G|5|6|7|1M|8|@]|D|@$9|1N|A|1O|1|1P]|$9|1Q|A|1R|1|1S]]|E|$]]|$1|H|3|I|5|6|7|1T|8|@]|D|@]|E|$]]|$1|J|3|K|5|L|7|1U|8|@]|D|@]|E|$M|N]]|$1|O|3|P|5|6|7|1V|8|@$9|1W|A|1X|B|C]|$9|1Y|A|1Z|B|C]|$9|20|A|21|B|C]|$9|22|A|23|B|C]|$9|24|A|25|B|C]|$9|26|A|27|B|C]]|D|@$9|28|A|29|1|2A]|$9|2B|A|2C|1|2D]|$9|2E|A|2F|1|2G]]|E|$]]|$1|Q|3|-4|5|6|7|2H|8|@]|D|@]|E|$]]]|R|$S|$5|T|U|V|E|$W|X]]|Y|$5|T|U|V|E|$W|Z]]|10|$5|T|U|V|E|$W|11]]|12|$5|T|U|V|E|$W|13]]|14|$5|T|U|V|E|$W|15]]|16|$5|T|U|V|E|$W|17]]|18|$5|T|U|V|E|$W|13]]]]

That is not a good idea, if you stick to this method things will probably get very messy sooner or later. When dealing with items that can be added and removed in WPF you will want to use an <a href="http://msdn.microsoft.com/en-us/library/system.windows.controls.itemscontrol.aspx" rel="nofollow"><code>ItemsControl</code></a> of some kind on top of panels (you can change the panel using the <a href="http://msdn.microsoft.com/en-us/library/system.windows.controls.itemscontrol.itemspanel.aspx" rel="nofollow"><code>ItemsPanel</code></a> property, by default it will be a <code>StackPanel</code>).

The creation of the controls can also be improved by using <a href="http://msdn.microsoft.com/en-us/library/ms742521.aspx" rel="nofollow">data templates</a> and <a href="http://msdn.microsoft.com/en-us/library/ms752347.aspx" rel="nofollow">data binding</a> which are core mechanisms that you should become familiar with.

An example:

<pre class="lang-xml prettyprint-override"><code>&lt;ItemsControl ItemsSource="{Binding Data}"&gt;
 &lt;ItemsControl.ItemTemplate&gt;
 &lt;DataTemplate&gt;
 &lt;StackPanel&gt;
 &lt;TextBox Text="{Binding Name}" Margin="5,5,5,0"/&gt;
 &lt;ListBox ItemsSource="{Binding Items}" Margin="5,5,5,0" Height="200"/&gt;
 &lt;/StackPanel&gt;
 &lt;/DataTemplate&gt;
 &lt;/ItemsControl.ItemTemplate&gt;
&lt;/ItemsControl&gt;
</code></pre>

Here <code>Data</code> is a source collection which should implement <a href="http://msdn.microsoft.com/en-us/library/system.collections.specialized.inotifycollectionchanged.aspx" rel="nofollow"><code>INotifyCollectionChanged</code></a>, then you can just remove an item from that collection and its corresponding StackPanel will be gone. The items in <code>Data</code> should contain the bound properties <code>Name</code> and <code>Items</code> which you then can assign values to or get entered text from (the class should implement <a href="http://msdn.microsoft.com/en-us/library/system.componentmodel.inotifypropertychanged.aspx" rel="nofollow"><code>INPC</code></a>, read more about those things in the <a href="http://msdn.microsoft.com/en-us/library/ms752347.aspx" rel="nofollow">article on data binding</a>).

blocks|key|816378|text|@米兰·哈拉达的答案对我来说很管用，只需要做一点改动。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|816379|while+(stackPanelAdd.Children.Count>0)
{
++stackPanelAdd.Children.RemoveAt(stackPanelAdd.Children.Count-1);
}|code-block|syntax|javascript|816380|因此，它删除了所有的孩子，然后我使用for循环动态地添加了新的孩子，并添加了新的数据。|816381|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

@Milan Halada's answer worked for me with a little change,

<pre><code>while (stackPanelAdd.Children.Count&gt;0)
{
 stackPanelAdd.Children.RemoveAt(stackPanelAdd.Children.Count-1);
}
</code></pre>

so, it removes all the children and then i add new children to it dynamically using for loop, with new data.

I have a button, when pressed it adds a textbox and a listbox to a stackpanel and adds this stackpanel to another stackpanel named "stackPanelAdd". Just like this:

<pre><code>private void buttonAdd_Click(object sender, RoutedEventArgs e)
{
 StackPanel sp = new StackPanel();
 TextBox tb = new TextBox(); 
 ListBox lb = new ListBox();

 tb.Margin = new Thickness(5, 5, 5, 0);
 lb.Margin = new Thickness(5, 5, 5, 0);
 lb.Height = 200;

 sp.Children.Add(tb);
 sp.Children.Add(lb);

 stackPanelAdd.Children.Add(sp);
}
</code></pre>

How do I remove the last children in the stackpanel "stackPanelAdd"?
Should I use something like stackPanelAdd.children.Remove? if so then how do i get the last element in the stackpanel?

Remove elements from stackpanel

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我有一个按钮，当按下它时，它会将文本框和列表框添加到堆栈面板中，并将此堆栈面板添加到另一个名为"stackPanelAdd“的堆栈面板中。就像这样：private void buttonAdd_Click(object sender, RoutedEventArgs e){    StackPanel sp = new...

问从堆栈面板中删除元素
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