查找 ComboBox 中项目的索引

Question

如何从中找到价值指数ComboBox？我尝试了这个，但它总是返回-1；

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

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下面是如何添加 ComboBox 项目：

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<ComboBox x:Name="sexCombo" Margin="5,20,10,0" VerticalAlignment="Top" Width="100" Style="{StaticResource MaterialDesignFloatingHintComboBox}" materialDesign:HintAssist.Hint="\xd8\xa7\xd9\x84\xd8\xac\xd9\x86\xd8\xb3" HorizontalContentAlignment="Left" Height="45" VerticalContentAlignment="Bottom">\n        <ComboBoxItem Content="\xd8\xb0\xd9\x83\xd8\xb1"/>\n        <ComboBoxItem Content="\xd8\xa3\xd9\x86\xd8\xab\xd9\x89"/>\n</ComboBox>\n

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Answer 1

包含Items的集合因此需要获取相应元素的索引。尝试这个：ComboBoxComboBoxItemsComboBoxItem

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