private void btUpdate_Click(object sender, EventArgs e)
{
int i = lbTopic.SelectedIndex;
if (i == -1)
{
MessageBox.Show("Select a topic to change");
return;
}
else
{
string oldTopicID = topicList[i].TopicID;
BOTopic bot = new BOTopic();
Topic t = new Topic(txtTopicID.Text, txtTopicName.Text);
bool success =bot.Update(t, oldTopicID);
if (success)
{
MessageBox.Show("Update topic success!");
loadTopicList();
}
else MessageBox.Show("Failed to update a topic!");
txtTopicID.Clear();
txtTopicName.Clear();
btUpdate.Enabled = false; btDelete.Enabled = false;
loadTopicList();
}
}
