在 WPF 组合框中查找 ComboBoxItem 的索引
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Finding the index of a ComboBoxItem in a WPF Combobox
提问by Yellow
I added a SelectionChangedevent to my ComboBox, and I need to find the index of the previous selected item. I can't find a simple way to find the item index, though. I've got:
我SelectionChanged在我的 ComboBox 中添加了一个事件，我需要找到上一个所选项目的索引。但是，我找不到找到项目索引的简单方法。我有：
// In the XAML file
<ComboBox Name="myCombobox" ItemsSource="{Binding MyCollectionView}" SelectionChanged="myCombobox_SelectionChanged" />
// In the XAML.cs file
public void myCombobox_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
ComboBoxItem item = e.RemovedItems[0];
if (e.AddedItems.Count > 0)
{
ComboBoxItem item = e.RemovedItems[0];
if (item != null)
int index = /* Find index of this item! */;
}
}
What is the easiest way to retrieve the correct index here? Why doesn't the ComboBoxItemjust have an Indexproperty?
在这里检索正确索引的最简单方法是什么？为什么不ComboBoxItem只是拥有Index财产？
回答by sexta13
Can you try something like this:
你可以尝试这样的事情：
Combobox comboBox = sender as ComboBox;
if (e.AddedItems.Count > 0)
{
ComboBoxItem item = e.RemovedItems[0];
if (item != null)
int index = combobox.Items.IndexOf(item);
}
