protected void Page_Load(object o, EventArgs e) {
if(!IsPostBack) {
ListItem item;
item = new ListItem("A");
languageListBox.Items.Add(item);
item = new ListItem("B");
languageListBox.Items.Add(item);
item = new ListItem("C");
languageListBox.Items.Add(item);
languageListBox.Rows = 3;
}
}
protected void ListBoxSelectionChanged(object o, EventArgs e) {
bool valueSet = false;
foreach(ListItem item in languageListBox.Items) {
if (item.Selected) {
if(valueSet) {
favoriteLanguage.Text += ", " + item.Text;
}
else {
favoriteLanguage.Text = item.Text;
valueSet = true;
}
}
}
}
runat="server"
SelectionMode="multiple"
OnSelectedIndexChanged="ListBoxSelectionChanged" />
Favorite Language:
style="color:blue"
Text="Not Set" />