Classe: TDropDownListColumn  - X-Ref

TDropDownListColumn class

TDropDownListColumn represents a column that is bound to a field in a data source.
The cells in the column will be displayed using the data indexed by
{@link setDataTextField DataTextField}. You can customize the display by
setting {@link setDataTextFormatString DataTextFormatString}.

If {@link setReadOnly ReadOnly} is false, TDropDownListColumn will display cells in edit mode
with dropdown lists. Otherwise, a static text is displayed.
The currently selected dropndown list item is specified by the data indexed with
{@link setDataValueField DataValueField}.

There are two approaches to specify the list items available for selection.
The first approach uses template syntax as follows,
<code>
<com:TDropDownListColumn ....>
<com:TListItem Value="1" Text="first item" />
<com:TListItem Value="2" Text="second item" />
<com:TListItem Value="3" Text="third item" />
</com:TDropDownListColumn>
</code>
The second approach specifies a data source to be bound to the dropdown lists
by setting {@link setListDataSource ListDataSource}. Like generic list controls,
you may also want to specify which data fields are used for item values and texts
by setting {@link setListValueField ListValueField} and
{@link setListTextField ListTextField}, respectively.
Furthermore, the item texts may be formatted by using {@link setListTextFormatString ListTextFormatString}.
Note, if you specify {@link setListDataSource ListDataSource}, do it before
calling the datagrid's dataBind().

The dropdown list control in the TDropDownListColumn can be accessed by one of
the following two methods:
<code>
$datagridItem->DropDownListColumnID->DropDownList
$datagridItem->DropDownListColumnID->Controls[0]
</code>
The second method is possible because the dropdown list control created within the
datagrid cell is the first child.