wpf - 在 ComboBox 中查找项目的索引

Question

如何从 ComboBox 中找到值索引？我试过了，但它总是返回 -1；

sexCombo.SelectedIndex = sexCombo.Items.IndexOf(teacherInfo["sex"].ToString());

这里是如何添加 ComboBox 项目的:

<ComboBox x:Name="sexCombo" Margin="5,20,10,0" VerticalAlignment="Top" Width="100" Style="{StaticResource MaterialDesignFloatingHintComboBox}" materialDesign:HintAssist.Hint="الجنس" HorizontalContentAlignment="Left" Height="45" VerticalContentAlignment="Bottom">
        <ComboBoxItem Content="ذكر"/>
        <ComboBoxItem Content="أنثى"/>
</ComboBox>

Answer 1

ComboBox的Items集合中包含ComboBoxItems所以需要获取对应的ComboBoxItem的索引元素。试试这个:

var comboBoxItem = sexCombo.Items.OfType<ComboBoxItem>().FirstOrDefault(x => x.Content.ToString() == teacherInfo["sex"].ToString());
int index = sexCombo.SelectedIndex = sexCombo.Items.IndexOf(comboBoxItem);