以编程方式获取DataGridComboBoxColumn中的ComboBox内容

// 获取DataGridComboBoxColumn对象
DataGridComboBoxColumn comboBoxColumn = dataGrid.Columns[0] as DataGridComboBoxColumn;

// 获取ComboBox对象
ComboBox comboBox = FindVisualChild<ComboBox>(comboBoxColumn.GetCellContent(dataGrid.SelectedItem));

// 获取ComboBox的内容
List<string> comboBoxItems = new List<string>();
foreach (var item in comboBox.Items)
{
    comboBoxItems.Add(item.ToString());
}

// 输出ComboBox的内容
foreach (var item in comboBoxItems)
{
    Console.WriteLine(item);
}

// 在Visual树中查找指定类型的子元素
private T FindVisualChild<T>(DependencyObject parent) where T : DependencyObject
{
    for (int i = 0; i < VisualTreeHelper.GetChildrenCount(parent); i++)
    {
        var child = VisualTreeHelper.GetChild(parent, i);
        if (child is T)
        {
            return (T)child;
        }
        else
        {
            T result = FindVisualChild<T>(child);
            if (result != null)
                return result;
        }
    }
    return null;
}