C＃更新查询语法错误（快速）

Question

这里非常简单，因为我对编码C＃非常陌生。正如您所提供的代码所示，我试图解决错误，我在屏幕截图中显示了接收信息。当我尝试更新访问数据库中保存的当前信息时，就会发生这种情况。 正如我所说，可能只是一个，但我无法看到错误

private void btnSchedule_Click(object sender, EventArgs e)
    {
        try
        {

            connection.Open();
            OleDbCommand command = new OleDbCommand();
            command.Connection = connection;
            string query = "Update patients SET First = '" + txtFirst.Text 
               + "', Last='" + txtLast.Text 
               + "', Address='" + txtAddress.Text 
               + "', Phone='" + txtPhone.Text 
               + "', LastVisit='" + txtLastVisit.Text 
               + "', NextVisit='" + txtNextVisit.Text 
               + "', Doctor='" + comboDoctor.Text 
               + "' WHERE patients.ID =" + lblID.Text + " ";
            command.CommandText = query;
            command.ExecuteNonQuery();
            MessageBox.Show("User Updated");
            connection.Close();
        }
        catch (Exception ex)
        {
            MessageBox.Show("User not updated " + ex);
        }
    }