public static IEnumerable <T> GetSelectedValues <T>(this SuggestListBox suggestListBox)
{
Contract.Requires(suggestListBox != null);
if (suggestListBox.SelectionMode == ListSelectionMode.Single)
{
throw new HttpException();
}
var indices = suggestListBox.GetSelectedIndices();
if (!indices.Any())
{
yield break;
}
foreach (var index in indices)
{
var listItem = suggestListBox.Items[index];
var listItemValue = listItem.Value;
if (string.IsNullOrEmpty(listItemValue))
{
continue;
}
var listItemParsedValue = (T)Convert.ChangeType(listItemValue, typeof(T));
yield return(listItemParsedValue);
}
}
public static bool SetSelectedValues <T>(this SuggestListBox suggestListBox, IEnumerable <T> values)
{
Contract.Requires(suggestListBox != null);
Contract.Requires(values != null);
if (suggestListBox.SelectionMode == ListSelectionMode.Single)
{
throw new HttpException();
}
suggestListBox.ClearSelection();
foreach (var value in values)
{
var stringValue = value.ToString();
var listItem = (from item in suggestListBox.Items.OfType <ListItem>()
where string.Equals(item.Value, stringValue)
select item).FirstOrDefault();
if (listItem == null)
{
return(false);
}
listItem.Selected = true;
}
return(true);
}
public static T GetSelectedText <T>(this SuggestListBox suggestListBox)
{
Contract.Requires(suggestListBox != null);
if (suggestListBox.SelectionMode == ListSelectionMode.Multiple)
{
throw new HttpException();
}
var selectedItem = suggestListBox.SelectedItem;
if (selectedItem == null)
{
return(default(T));
}
if (string.IsNullOrEmpty(selectedItem.Text))
{
return(default(T));
}
return((T)Convert.ChangeType(selectedItem.Text, typeof(T)));
}
public static bool SetSelectedValue <T>(this SuggestListBox suggestListBox, T value)
{
Contract.Requires(suggestListBox != null);
if (suggestListBox.SelectionMode == ListSelectionMode.Multiple)
{
throw new HttpException();
}
var stringValue = value.ToString();
var listItem = (from item in suggestListBox.Items.OfType <ListItem>()
where string.Equals(item.Value, stringValue)
select item).FirstOrDefault();
if (listItem == null)
{
return(false);
}
suggestListBox.SelectedValue = listItem.Value;
return(true);
}
