MACROMEDIA COLDFUSION MX 7.0.2-USING COLDFUSION MX WITH FLEX 2 Guia do Utilizador descarregar pdf (Página 211)

Insert a WebService component 211

The wsdl property specifies the location of the WSDL file for the web service. As of this

writing, the location was still valid, but you should check to make sure it hasn’t changed.

You can find the latest WSDL file location on the developers page at www.adobe.com/go/

mxna_developers, under Web Services.

The

useProxy property specifies that you don’t want to use a proxy on a server. For more

information, see “Review your access to remote data sources” on page 206.

2. Specify the parameters to pass to the web service method.

According to the API documentation, the

getMostPopularPosts method takes the

following required parameters:

■ daysBack specifies the number of days you want to go back.

■ limit specifies the total number of rows you want returned.

To specify these parameters, enter the following tags between the opening and closing

<mx:WebService> tags:

<mx:operation name="getMostPopularPosts">

<mx:request>

<limit>{cbxNumPosts.value}</limit>

</mx:request>

</mx:operation>

The name property of an <mx:operation> tag must match the web service method name.

You use a constant for the value of the

daysBack parameter, but you bind the value of the

limit parameter to the value of the selected item in the cbxNumPosts ComboBox

control. You want the user to specify the number of posts to list.

The next step is to prompt the application to call the web service method. You decide the

method should be called when the ComboBox control changes in response to the user

selecting an option.

3. In the <mx:ComboBox> tag, add the following change property (in bold):

<mx:ComboBox x="30" y="25" id="cbxNumPosts"

change="wsBlogAggr.getMostPopularPosts.send()">

NOTE

If you want, you can also use the following alias in the component: http://

www.adobe.com/go/flex_mxna_wsdl.

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MACROMEDIA COLDFUSION MX 7.0.2-USING COLDFUSION MX WITH FLEX 2 Guia do Utilizador Página 211