[mapguide-users] Issue when Configuring AdditionalParameter in an InvokeURL Widget

[geomapper]

Hello everyone,

For my map, I am trying to create a report widget that uses an InvokeURL
call to retrieve parameters from a point layer on the map, and send these
parameters to a report generation script that takes the variables and passes
them to a tabular report page for clients to view. I have got an InvokeUrl
process in the Ajax map which works as intended, but I am having
difficulties in configuring the parameters in the widget for the Fusion
viewer. I'm currently using Maestro 4.0.1.

Here is the XML for the InvokeUrl widget I am trying to create:
<?xml version="1.0"?>
<WidgetType xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:xsd="http://www.w3.org/2001/XMLSchema" xsi:type="UiWidgetType">
  <Name>Report Generator</Name>
  <Type>InvokeURL</Type>
  <Location />
  <Extension>
    <Url>http://localhost/Scripts/FormGenerator.php</Url>
    <DisableIfSelectionEmpty>true</DisableIfSelectionEmpty>
    <Target />
    <LayerSet>
          <Layer>Testlayer</Layer>
        </LayerSet>
    <AdditionalParameter>
          <Key>Selected</Key>
          <Value>$CurrentSelection</Value>
        </AdditionalParameter>
    <AdditionalParameter>
          <Key>DesiredField</Key>
          <Value>MASTERID</Value>
        </AdditionalParameter>
    <AdditionalParameter>
          <Key>LayerName</Key>
          <Value>TestLayer_Name</Value>
        </AdditionalParameter>
    <AdditionalParameter>
          <Key>URL</Key>
          <Value>http://localhost/TestFiles/reporttable.asp</Value>
        </AdditionalParameter>
    <AdditionalParameter>
          <Key>DestinationKeyName</Key>
          <Value>MASTERID</Value>
        </AdditionalParameter>
  </Extension>
  <ImageUrl>images/icons.png</ImageUrl>
  <ImageClass>options</ImageClass>
  <Label>Report TEST</Label>
  <Tooltip>Report TEST</Tooltip>
  <StatusText>Report TEST</StatusText>
  <Disabled>false</Disabled>
</WidgetType>

Whenever I click "Save" upon customising this widget, however, the widget
automatically changes itself to look like this:

<?xml version="1.0"?>
<WidgetType xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:xsd="http://www.w3.org/2001/XMLSchema" xsi:type="UiWidgetType">
  <Name>Report Generator</Name>
  <Type>InvokeURL</Type>
  <Location />
  <Extension>
    <Url>http://localhost/Scripts/FormGenerator.php</Url>
    <DisableIfSelectionEmpty>true</DisableIfSelectionEmpty>
    <Target />
    <LayerSet>
      <Layer>Testlayer</Layer>
    </LayerSet>
    <AdditionalParameter>
      <Key>Selected</Key>
      <Value>$CurrentSelection</Value>
    </AdditionalParameter>
    <AdditionalParameter>
      <Key>Selected</Key>
      <Value>$CurrentSelection</Value>
    </AdditionalParameter>
    <AdditionalParameter>
      <Key>Selected</Key>
      <Value>$CurrentSelection</Value>
    </AdditionalParameter>
    <AdditionalParameter>
      <Key>Selected</Key>
      <Value>$CurrentSelection</Value>
    </AdditionalParameter>
    <AdditionalParameter>
      <Key>Selected</Key>
      <Value>$CurrentSelection</Value>
    </AdditionalParameter>
  </Extension>
  <ImageUrl>images/icons.png</ImageUrl>
  <ImageClass>options</ImageClass>
  <Label>Report TEST</Label>
  <Tooltip>Report TEST</Tooltip>
  <StatusText />
  <Disabled>false</Disabled>
</WidgetType>

So, in short, any additional parameters after the first one appears to be
replaced by clones of the first additional parameter.

Before I decided to post here, I did troubleshooting and found some older
posts about InvokeUrl errors. After trying the suggestions 
http://trac.osgeo.org/mapguide/ticket/832 here , 
http://trac.osgeo.org/mapguide/ticket/680 here , and 
http://osgeo-org.1560.n6.nabble.com/Invoke-URL-in-MapGuide-Studio-td4200680.html
here , I am still faced with my same issue. I believe that the error might
be in how I am writing the XML, but don't know what the correct way to
format the widget is. The 
http://trac.osgeo.org/fusion/wiki/Widgets/InvokeURL page on using InvokeUrl
over on trac  does not offer too much information.

Any advice on this would be greatly appreciated. Thanks very much for your
time and apologies for such a long post.






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