WPF ComboBox 展开之后，如何实现鼠标移出后自动收起ComboBox Item？

Question

尝试直接设置ComboBox的MouseLeave 事件，发现鼠标移出时并不触发；

然后在别的控件的Mouse Enter中设置相关属性，发现也不触发。

可能ComboBox捕获鼠标移至为true，导致那些基于Mouse位移的事件都不触发。

那么，如何才能实现在鼠标移出后自动收起ComboBox Item？

Answer 1

你好，

可以使用 IsMouseDirectlyOverChanged 来实现。

private void ComboBox_IsMouseDirectlyOverChanged(object sender, DependencyPropertyChangedEventArgs e)
{
            if (combo1.IsDropDownOpen == true)
            {
                combo1.IsDropDownOpen = false;
            }
 }

Best regards,

Zhanglong

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