MACROMEDIA FLASH 8-EXTENDING FLASH Manual do Utilizador descarregar pdf (Página 16)

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Populating a Datagrid with Dynamic Data

In this section, instead of linking your Combo Box to a List Box, you will

link the Combo Box to a Flash MX DataGrid, so that only the products for

the selected category display on the grid. You will then modify column

headers, set default widths, and make some columns invisible.

Steps

1. In Flash MX, open RemoteDatagrid_raw.fla in the war directory.

2. Save it as RemoteDatagrid.fla in the war directory.

Linking the Combo Box to the Datagrid

3. Open the Actions panel for frame 1 of the Actions layer (press F9).

4. Examine the code. It should be very similar to the previous widget,

since the Categories ComboBox has the same handler functions as

before, namely the responder and the change handler.

5. Implement the getProductsByCategory_result() responder function

such that it populates the datagrid with the rows retrieved by the

remote call, as follows:

 Inside the function, remove any existing items in the DataGrid by

calling its removeAllItems() method.

 The recordset received from the remote call is already in the

format that the Flash DataGrid expects it: every object has

property names that can be references. Just invoke the

setDataProvider() method on the datagrid passing result as the

input :

product_dg.setDataProvider(result);

 Here is the completed code for your reference:

function getProductsByCategory_result(result) {

product_dg.removeAllItems();

product_dg.setDataProvider(result);

}

6. Test the movie (Cntl + Enter). You should see all the data retrieved for

all the products in the “snow” category.

Formatting Columns on the Datagrid

In order to hide columns, provide headers, and resize the widths of the

columns, you must format the DataGrid using methods of this class. The

following steps accomplish this:

7. Position the cursor at the bottom of the code, under any existing code.

8. Create a reference called name_col.

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MACROMEDIA FLASH 8-EXTENDING FLASH Manual do Utilizador Página 16