Silverlight - 如何在组合框中获取所选项目的文本

private void ComboBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
    ComboBox comboBox = sender as ComboBox;
    if (comboBox != null && comboBox.SelectedItem != null)
    {
        string selectedText = comboBox.SelectedItem.ToString();
        // 在此处处理所选项目的文本
    }
}

private void ComboBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
    ComboBox comboBox = sender as ComboBox;
    if (comboBox != null && comboBox.SelectedItem != null)
    {
        TextBlock textBlock = comboBox.SelectedItem as TextBlock;
        if (textBlock != null)
        {
            string selectedText = textBlock.Text;
            // 在此处处理所选项目的文本
        }
    }
}

private void GetSelectedText()
{
    if (comboBox.SelectedItem != null)
    {
        string selectedText = comboBox.SelectedItem.ToString();
        // 在此处处理所选项目的文本
    }
}