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好的，我有以下代码。它做了我想要的一切，除了这一件事。您在哪里看到查询：

 string query1 = "UPDATE caregiverdatabse SET child1 = NULL WHERE id='" + selectedCaregiver + "'";

这只能让我将行中的“child1”列设置为空。我希望它能够通过 child1、child2、child3、child4 或 child5（不必像现在这样直接编码）。前面的代码：

string currentChildIndex = "";
string spotOfChange = "";
int index;
string item;
foreach (int i in childrenListBoxDisp.SelectedIndices)
{
    item = childrenListBoxDisp.Items[i].ToString();
}

允许我仅删除链接到 MySQL 数据库的 childrenListBoxDisp 中的第一个选定项目，并且仅当它位于 child1 列中时。我希望它能够根据选择的项目删除任何 childX 列。这一切都在我相信的查询中。帮助表示赞赏！

其余代码：

            DialogResult dialogResult = 
                    MessageBox.Show("You are about to remove " + item + 
                    " person from the selected caregiver. Continue?", "Are you sure?",
                    MessageBoxButtons.YesNo);
            if (dialogResult == DialogResult.Yes)
            {

                MySqlConnection connection = new MySqlConnection("Server=" + server +
                    ";" + "Port=" + port + ";" + "Database=" + database + ";" 
                    + "Uid=" + uid + ";" + "Password=" + password + ";");
                connection.Open();

                string query1 = "UPDATE caregiverdatabse SET child1 = NULL WHERE id='"
                                     + selectedCaregiver + "'";
                childrenListBoxDisp.Items.Clear();
                assignNamesToChildList();
                Console.WriteLine("Did we get here , clearing list");
                using (var command = new MySqlCommand(query1, connection))
                {
                    using (var reader = command.ExecuteReader())
                    {
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