禁用 WPF ComboBox 的下拉菜单
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Disable the drop down menu of a WPF ComboBox
提问by kmarks2
I have a ComboBox as specified below:
我有一个如下指定的组合框：
<ComboBox Height="31" Margin="7,7,0,0" Name="callerID" IsEditable="True" Background="LightBlue" KeyDown="callerIDbar_KeyDown" Foreground="White" FontSize="17" FontWeight="Bold" HorizontalContentAlignment="Center" VerticalAlignment="Top" Grid.Row="0" Grid.Column="0" />
storedCallsis a collection of phone numbers that will be populated to the ComboBox.Items:
storedCalls是将填充到以下内容的电话号码集合ComboBox.Items：
foreach (string call in storedCalls)
{
if (call != "Enter a number to dial")
callerID.Items.Add(call);
}
All this works fine. I populate the Itemsprimary because I like the autocomplete that is driven by the values in the ComboBox's Itemscollections. Is there a way the XAML to disable the drop down error, and disable the drop down menu? I.e. make a simple auto complete textbox like control?
所有这些工作正常。我填充Items主要是因为我喜欢由ComboBox'sItems集合中的值驱动的自动完成。XAML 有没有办法禁用下拉错误并禁用下拉菜单？即制作一个简单的自动完成文本框之类的控件？
I have seen full on TextBoxcontrols that include a bunch of code-behind and complicated markup, and this is not what I am looking to do. I just need to disable the ability of the drop down menu from showing.
我已经看到完整的TextBox控件，包括一堆代码隐藏和复杂的标记，这不是我想要做的。我只需要禁用下拉菜单的显示功能。
回答by Mr.Pidra
You can handle the DropDownOpenedevent and then close it.
So in n the XAML you get:
您可以处理该DropDownOpened事件，然后关闭它。
所以在 XAML 中你得到：
<ComboBox x:Name="cb" DropDownOpened="cb_DropDownOpened"/>
And in Code Behind:
在代码隐藏中：
private void cbCategoria_DropDownOpened(object sender, EventArgs e)
{
ComboBox cb = sender as ComboBox;
cb.IsDropDownOpen = false;
}
I prefear this solution reather than set MaxDropDownHeightto 0.
Your choice.
我更喜欢这个解决方案而不是设置MaxDropDownHeight为 0。你的选择。
