blocks|key|1385493|text|为您的ComboBox使用MouseWheel事件：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1385494|void+comboBox1_MouseWheel(object+sender,+MouseEventArgs+e)+{
++++((HandledMouseEventArgs)e).Handled+=+true;
}|code-block|syntax|javascript|1385495|注意:你必须在代码中创建事件：|1385496|comboBox1.MouseWheel+%2B=+new+MouseEventHandler(comboBox1_MouseWheel);|1385497|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/system.windows.forms.control.mousewheel.aspx^0|D|A|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@$A|V|B|W|1|X]]|C|$]]|$1|D|3|E|5|F|7|Y|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|Z|8|@]|9|@]|C|$]]|$1|K|3|L|5|F|7|10|8|@]|9|@]|C|$G|H]]|$1|M|3|-4|5|6|7|11|8|@]|9|@]|C|$]]]|N|$O|$5|P|Q|R|C|$S|T]]]]

Use the <a href="http://msdn.microsoft.com/en-us/library/system.windows.forms.control.mousewheel.aspx" rel="noreferrer">MouseWheel</a> event for your ComboBox:

<pre><code>void comboBox1_MouseWheel(object sender, MouseEventArgs e) {
 ((HandledMouseEventArgs)e).Handled = true;
}
</code></pre>

Note: you'll have to create event in code:

<pre><code>comboBox1.MouseWheel += new MouseEventHandler(comboBox1_MouseWheel);
</code></pre>

blocks|key|1170412|text|我的组合框被放在一个DataGrid+C#，WPF+XAML中，就像这样：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1170413|++++<DataGrid+x:Name="dgvFieldsMapping"+Grid.Row="1"+ItemsSource="{Binding}">
++++++++<DataGrid.Columns>
++++++++++++...
++++++++++++<DataGridTemplateColumn+Width="*"+Header="Destination+Field"+>
++++++++++++++++<DataGridTemplateColumn.CellTemplate+>
++++++++++++++++++++<DataTemplate+>
++++++++++++++++++++++++<ComboBox+ItemsSource="{Binding+Source={StaticResource+CustomerDbFields}}"+SelectedValue="{Binding+destinationField,+Mode=TwoWay,+UpdateSourceTrigger=PropertyChanged}"+></ComboBox>
++++++++++++++++++++</DataTemplate>
++++++++++++++++</DataGridTemplateColumn.CellTemplate>
++++++++++++</DataGridTemplateColumn>
++++++++++++...
++++++++</DataGrid.Columns>
++++</DataGrid>|code-block|syntax|javascript|1170414|因此，无论何时在选择一个值后关闭DropDown，鼠标滚轮都会滚动该组合框的项并修改我的选择。|1170415|我最终修改了我的XAML，使其看起来像这样：|1170416|++++<DataGrid+x:Name="dgvFieldsMapping"+Grid.Row="1"+ItemsSource="{Binding}">
++++++++<DataGrid.Resources>
++++++++++++<Style+x:Key="dgvComboBox_Loaded"+TargetType="ComboBox">
++++++++++++++++<EventSetter+Event="Loaded"+Handler="dgvCombobox_Loaded"+/>
++++++++++++</Style>
++++++++</DataGrid.Resources>
++++++++<DataGrid.Columns>
++++++++++++...
++++++++++++<DataGridTemplateColumn+Width="*"+Header="Destination+Field"+>
++++++++++++++++<DataGridTemplateColumn.CellTemplate+>
++++++++++++++++++++<DataTemplate+>
++++++++++++++++++++++++<ComboBox+Style="{StaticResource+dgvComboBox_Loaded}"+ItemsSource="{Binding+Source={StaticResource+CustomerDbFields}}"+SelectedValue="{Binding+destinationField,+Mode=TwoWay,+UpdateSourceTrigger=PropertyChanged}"+></ComboBox>
++++++++++++++++++++</DataTemplate>
++++++++++++++++</DataGridTemplateColumn.CellTemplate>
++++++++++++</DataGridTemplateColumn>
++++++++++++...
++++++++</DataGrid.Columns>
++++</DataGrid>|1170417|并将这些代码行添加到代码隐藏中|1170418|++++++++public+void+dgvCombobox_Loaded(Object+sender,+RoutedEventArgs+e)
++++++++{
++++++++++++((ComboBox)sender).DropDownClosed+-=+ComboBox_OnDropDownClosed;
++++++++++++((ComboBox)sender).DropDownClosed+%2B=+new+System.EventHandler(ComboBox_OnDropDownClosed);
++++++++}

++++++++void+ComboBox_OnDropDownClosed(object+sender,+System.EventArgs+e)
++++++++{
++++++++++++dgvFieldsMapping.Focus();
++++++++}|1170419|通过这种方式，我只需在关闭相应的ComboBox之后将焦点从DataGrid移到外部DropDown，这样就不需要添加任何虚拟FrameWorkElement|1170420|entityMap^0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|W|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|X|8|@]|9|@]|A|$]]|$1|K|3|L|5|D|7|Y|8|@]|9|@]|A|$E|F]]|$1|M|3|N|5|6|7|Z|8|@]|9|@]|A|$]]|$1|O|3|P|5|D|7|10|8|@]|9|@]|A|$E|F]]|$1|Q|3|R|5|6|7|11|8|@]|9|@]|A|$]]|$1|S|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|T|$]]

My Combobox's were placed inside a DataGrid [C#, WPF XAML] just like this:

<pre><code> &lt;DataGrid x:Name="dgvFieldsMapping" Grid.Row="1" ItemsSource="{Binding}"&gt;
 &lt;DataGrid.Columns&gt;
 ...
 &lt;DataGridTemplateColumn Width="*" Header="Destination Field" &gt;
 &lt;DataGridTemplateColumn.CellTemplate &gt;
 &lt;DataTemplate &gt;
 &lt;ComboBox ItemsSource="{Binding Source={StaticResource CustomerDbFields}}" SelectedValue="{Binding destinationField, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" &gt;&lt;/ComboBox&gt;
 &lt;/DataTemplate&gt;
 &lt;/DataGridTemplateColumn.CellTemplate&gt;
 &lt;/DataGridTemplateColumn&gt;
 ...
 &lt;/DataGrid.Columns&gt;
 &lt;/DataGrid&gt;
</code></pre>

So whenever a DropDown was closed after selecting a Value, the Mousewheel would scroll that Combobox's Items and modify my Selection.

I ended up modifying my XAML to look like this:

<pre><code> &lt;DataGrid x:Name="dgvFieldsMapping" Grid.Row="1" ItemsSource="{Binding}"&gt;
 &lt;DataGrid.Resources&gt;
 &lt;Style x:Key="dgvComboBox_Loaded" TargetType="ComboBox"&gt;
 &lt;EventSetter Event="Loaded" Handler="dgvCombobox_Loaded" /&gt;
 &lt;/Style&gt;
 &lt;/DataGrid.Resources&gt;
 &lt;DataGrid.Columns&gt;
 ...
 &lt;DataGridTemplateColumn Width="*" Header="Destination Field" &gt;
 &lt;DataGridTemplateColumn.CellTemplate &gt;
 &lt;DataTemplate &gt;
 &lt;ComboBox Style="{StaticResource dgvComboBox_Loaded}" ItemsSource="{Binding Source={StaticResource CustomerDbFields}}" SelectedValue="{Binding destinationField, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" &gt;&lt;/ComboBox&gt;
 &lt;/DataTemplate&gt;
 &lt;/DataGridTemplateColumn.CellTemplate&gt;
 &lt;/DataGridTemplateColumn&gt;
 ...
 &lt;/DataGrid.Columns&gt;
 &lt;/DataGrid&gt;
</code></pre>

And adding these lines in codebehind

<pre><code> public void dgvCombobox_Loaded(Object sender, RoutedEventArgs e)
 {
 ((ComboBox)sender).DropDownClosed -= ComboBox_OnDropDownClosed;
 ((ComboBox)sender).DropDownClosed += new System.EventHandler(ComboBox_OnDropDownClosed);
 }

 void ComboBox_OnDropDownClosed(object sender, System.EventArgs e)
 {
 dgvFieldsMapping.Focus();
 }
</code></pre>

In this way I just move the Focus away from the ComboBox to the outer DataGrid after closing its corresponding DropDown, so I don't need to add any dummy FrameWorkElement

I have a combobox and I want to prevent the user from scrolling through the items with the mousewheel.

Is there an easy way to do that?

(C#, VS2008)

C# - how do I prevent mousewheel-scrolling in my combobox?

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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我有一个组合框，我想防止用户用鼠标滚轮滚动项目。有什么简单的方法可以做到这一点吗？(C#，VS2008)

问C# -如何防止组合框中的鼠标滚轮滚动？
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