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example using <parameter> to to pass data to a subdial

Posted: Tue Sep 02, 2003 11:25 am
by support
When using <param> to pass a value to a subdialog, you must redeclare the variable name in the subdialog script you are using. Example:

Calling Page:

Code: Select all

<?xml version="1.0"?>
<vxml version="2.0">
  <var name="local_parm1" expr="'A B C D'"/>
  <var name="local_parm2" expr="'1 2 3 4'"/>
  <form>
    <subdialog src="subdialog.vxml">
      <param name="parm1" expr="local_parm1"/>
      <param name="parm2" expr="local_parm2"/>
    </subdialog>
  </form>
</vxml>


Subdialog Page:

Code: Select all

<?xml version="1.0"?>
<vxml version="2.0">
  <form id="subdialog1">
    <var name="parm1"/>
    <var name="parm2"/>
    <block>
      parm 1 is <value expr="parm1"/>.
      parm 2 is <value expr="parm2"/>
      <return/>
    </block>
  </form>
</vxml>


Notice that in the subdialog page it is we redeclare the variables parm1 and parm2. Using undeclared variables in vxml throw an error.semantic event.

Here's how you can return an array object from a subdialog

Posted: Wed Oct 08, 2003 5:47 pm
by support
Here's an example of an array returned from a subdialog:

Code: Select all

<?xml version="1.0" encoding="UTF-8"?>
<vxml version="2.0">
        <form id="caller">
                <block>
                        <prompt>Going to jump.</prompt>
                </block>
                <subdialog name="subd" src="#callee">
                        <param name="myid" expr="'caller form'"/>
                </subdialog>
                <block>
                        <prompt>
                                Jumped back. The array contains:
                                <value expr="subd.myarray[0]"/>
                                <value expr="subd.myarray[1]"/>
                                <value expr="subd.myarray[2]"/>
                                <value expr="subd.myarray[3]"/>
                        </prompt>
                </block>
        </form>
        <form id="callee">
                <var name="myid"/>
                <var name="myarray"/>
                <script>
                        myarray = new Array(4);
                        myarray[0] = 'one';
                        myarray[1] = 'two';
                        myarray[2] = 'three';
                        myarray[3] = 'four';
                </script>
                <block>
                        <prompt>Jumped from <value expr="myid"/>.</prompt>
                        <return namelist="myarray"/>
                </block>
        </form>
</vxml>

The output from the above script is:
Going to jump...
Jumped from 'caller form'...
Jumped back. The array contains 'one two three four'...