blocks|key|3256554|text|请尝试以下操作|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3256555|listBox1.DataBind()|code-block|syntax|javascript|3256556|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 the following

<pre><code>listBox1.DataBind()
</code></pre>

blocks|key|1948594|text|这里是我关于堆栈交换的第一个答案。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1948595|C#+.Net+4.0：|1948596|listBox1.DataSource+=+null;
listBox1.DataSource+=+names;|code-block|syntax|javascript|1948597|我注意到，第一次设置数据源时，它会刷新。当它被设置时，当你再次尝试将它设置为相同的值时，它不会更新。|1948598|因此我将其设为空，将其设置为相同的值，并在出现此问题时为我正确显示。|1948599|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|Q|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

my first answer on stack exchange here.

C# .Net 4.0:

<pre><code>listBox1.DataSource = null;
listBox1.DataSource = names;
</code></pre>

I noticed that setting the datasource for the first time, it refreshes.
When it's set, and you try set it to the same one again, it doesn't update.

So I made it null, set it to the same one, and it displayed correctly for me with this issue.

blocks|key|1948651|text|只有当绑定在dataSource上的对象通知它自己的更改时，ListBox才会更新其显示的内容。BindingSource对象有一个名为DataSourceChanged的事件。当源被更改为不同的对象时，列表框将自动更新。绑定列表时也是如此。如果您更改列表，则不会发生任何事情，因为列表不会通知它已更改。这个问题有一个简单的解决方案:使用BindingList+http://msdn.microsoft.com/de-de/library/ms132679%2528v=vs.110%2529.aspx|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1948652|每次列表更改时(显然)，BindingList都会调用ListChanged事件。因此，Windows.Form对象的DataBindings使用像ListChanged这样的事件来更新自身。简单列表不支持此事件。|1948653|所以如果你想使用大量的数据绑定，你应该知道：http://msdn.microsoft.com/de-de/library/system.componentmodel.inotifypropertychanged%2528v=vs.110%2529.aspx|1948654|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/de-de/library/ms132679%2528v=vs.110%2529.aspx|1|http://msdn.microsoft.com/de-de/library/system.componentmodel.inotifypropertychanged%2528v=vs.110%2529.aspx^0|51|1V|0|0|0|M|2V|1|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@$A|S|B|T|1|U]]|C|$]]|$1|D|3|E|5|6|7|V|8|@]|9|@]|C|$]]|$1|F|3|G|5|6|7|W|8|@]|9|@$A|X|B|Y|1|Z]]|C|$]]|$1|H|3|-4|5|6|7|10|8|@]|9|@]|C|$]]]|I|$J|$5|K|L|M|C|$N|O]]|P|$5|K|L|M|C|$N|Q]]]]

ListBox only updates its shown content when the object that is binded on dataSource notifys it own changes. the BindingSource object has an event called DataSourceChanged. when the Source is changed to a different object the Listbox will update itself.
Same thing when you bind a List. Nothing will happen if you change the List, because the List doesn't notify that it has been changed. There is a Simple solution for this Problem: use BindingList
<a href="http://msdn.microsoft.com/de-de/library/ms132679%28v=vs.110%29.aspx" rel="nofollow">http://msdn.microsoft.com/de-de/library/ms132679%28v=vs.110%29.aspx</a>

the BindingList has the ListChanged Event is called every time when the List is changed (obviously). So the DataBindings of Windows.Form objects use events like ListChanged to update themselves. A simple List doesn't support this event.

SO if you want to work with a lot of Data Bindings you should know about:
<a href="http://msdn.microsoft.com/de-de/library/system.componentmodel.inotifypropertychanged%28v=vs.110%29.aspx" rel="nofollow">http://msdn.microsoft.com/de-de/library/system.componentmodel.inotifypropertychanged%28v=vs.110%29.aspx</a>

blocks|key|3256667|text|成功地做到了|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3256668|FirstListBox.DataContext+=+null;
FirstListBox.DataContext+=+App.ViewModel;|code-block|syntax|javascript|3256669|简单地失去链接，并将所有数据恢复到它。|3256670|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|$]]

Managed to do just with

<pre><code>FirstListBox.DataContext = null;
FirstListBox.DataContext = App.ViewModel;
</code></pre>

Simply loses link and get all the data back to it.

blocks|key|3256690|text|我继承了ListBox并添加了一个名为RefreshItems()的公共方法，它做了我们想要做的事情。已经实现了所有的功能。我不知道他们为什么不放入一个公共方法。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3256691|entityMap^0|4|7|J|E|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|M|8|@]|D|@]|E|$]]]|G|$]]

I inherited <code>ListBox</code> and added a public method calling <code>RefreshItems()</code> which does what we want. Already implemented and all. I dont know why they didnt put in a public method.

blocks|key|1944923|text|问题可能出在ListBox+SelectionMode上。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1944924|出于一个我不知道的原因，当SelectionMode为SelectionMode.None时，数据绑定不起作用。|1944925|一种解决方法可能是：|1944926|listBox.SelectionMode+=+SelectionMode.MultiExtended;
listBox.DataSource+=+myDatasource;
listBox.SelectionMode+=+SelectionMode.None;|code-block|syntax|javascript|1944927|希望能有所帮助。|1944928|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|Q|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|R|8|@]|9|@]|A|$I|J]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

The problem might come from the ListBox SelectionMode.

For a reason that I don't know, the databinding does not work when SelectionMode is SelectionMode.None.

A workaround could be:

<pre><code>listBox.SelectionMode = SelectionMode.MultiExtended;
listBox.DataSource = myDatasource;
listBox.SelectionMode = SelectionMode.None;
</code></pre>

Hope it helps.

blocks|key|1190911|text|在没有绑定的情况下，我只能使用：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1190912|this.Hide();
this.Show();|code-block|syntax|javascript|1190913|它会重新绘制所有的东西。|1190914|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|$]]

well, without binding I only managed with:

<pre><code>this.Hide();
this.Show();
</code></pre>

it redraws everything...

blocks|key|3256590|text|使用BeginUpdate和EndUpdate，应该可以解决这个问题。不需要设置两次数据源|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3256591|listBox1.BeginUpdate();

listBox1.DataSource+=+myList;

listBox1.EndUpdate();|code-block|syntax|javascript|3256592|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|$]]

Use BeginUpdate and EndUpdate, that should solve it.
No need to set the data source twice

<pre><code>listBox1.BeginUpdate();

listBox1.DataSource = myList;

listBox1.EndUpdate();
</code></pre>

blocks|key|4856993|text|这些链接可能会有所帮助。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4856994|如何更新列表框项目(C#)？-+http://arstechnica.com/civis/viewtopic.php?f=20&t=554717|offset|length|4856995|将ArrayList绑定到ListBox+-+http://www.java2s.com/Tutorial/CSharp/0460__GUI-Windows-Forms/BindArrayListtoListBox.htm|4856996|entityMap|0|LINK|mutability|MUTABLE|url|http://arstechnica.com/civis/viewtopic.php?f=20&t=554717|1|http://www.java2s.com/Tutorial/CSharp/0460__GUI-Windows-Forms/BindArrayListtoListBox.htm^0|0|G|1K|0|0|N|2G|1|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|S|8|@]|9|@$D|T|E|U|1|V]]|A|$]]|$1|F|3|G|5|6|7|W|8|@]|9|@$D|X|E|Y|1|Z]]|A|$]]|$1|H|3|-4|5|6|7|10|8|@]|9|@]|A|$]]]|I|$J|$5|K|L|M|A|$N|O]]|P|$5|K|L|M|A|$N|Q]]]]

These links might help.

How can I update a listbox item (C#)? - <a href="http://arstechnica.com/civis/viewtopic.php?f=20&amp;t=554717" rel="nofollow">http://arstechnica.com/civis/viewtopic.php?f=20&amp;t=554717</a>

Bind ArrayList to ListBox - 
<a href="http://www.java2s.com/Tutorial/CSharp/0460__GUI-Windows-Forms/BindArrayListtoListBox.htm" rel="nofollow">http://www.java2s.com/Tutorial/CSharp/0460__GUI-Windows-Forms/BindArrayListtoListBox.htm</a>

blocks|key|1191105|text|Windows窗体要在加载完成之前查看更改，特别是在列表框和其他控件上的更改，这是很棘手的。若要在加载数据时查看数据，请使用invalidate()；然后使用Update()；|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1191106|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Windows forms to see changes especially on Listbox and other controls before load is finished is tricky.
To see data as its loaded use invalidate(); then Update();

<pre><code>int[] arr = int[100];
listBox1.DataSource = arr;
void ComboBox1SelectedIndexChanged(object sender, EventArgs e)
{
 .....//some processes
 listBox1.DataSource = null;
 listBox1.DataSource = arr;
}

is not working,
</code></pre>

also,

<pre><code>listBox1.Refresh(); is not working,
</code></pre>

also,

<pre><code>listBox1.Update(); is not working,
</code></pre>

 
i know i can use <code>BindingList&lt;T&gt;</code> but i have to work with only array.

can you help me how can i refresh listbox?

listbox Refresh() in c#

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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int[] arr = int[100];listBox1.DataSource = arr;void ComboBox1SelectedIndexChanged(object sender, EventArgs e){    .....//some processes    listBox1.DataSource = null;    listBox1.DataSource = arr;}is 

问c#中的列表框刷新()
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