Update charts and datagrids based on selection

I have trying to find documentation and examples explaining how I can choose something in a combobox control and do fill a series of datagrids and charts.

GUIDELINES:

Has. using a table XML of all municipalities in our region populate a combobox.  Then have the user select the municipality they are interested.

B. take a picture of census which is in XML format and using HTTPServices read it in Flex and then based on what the user selected municipality fill a datagrid and a variety of graphs with data pertaining to the muni.

I know that it is done because I see it all the time and took a class last week where it has been shown.  Unfortunately, it was the last day of the class and time was running out, so we received a brief overview of this.

I would be very appriciate anyone who can tell me the samples and documentation either online or in books.  And I should mention that the terminology is always a problem.  I'm trying to do a custom event or what?

The code below all the works.  What I want to say that I am filling successfully control combobox and datagrid with the appropriate data.  I'm not able to get the two communicate with each other.  In other words the datagrid is showing the whole table and ignoring the combobox.

<? XML version = "1.0" encoding = "utf-8"? >
"" < mx:Application xmlns:mx = "http://www.adobe.com/2006/mxml"
Layout = "vertical".
creationComplete = "initApp ()" >

< mx:Script >
<! [CDATA]
Mx.rpc.events import. *;
Mx.controls import. *;
Mx.charts import. *;
Import mx.collections. *;

[Bindable]
private var acMuni:ArrayCollection = new ArrayCollection collection;
[Bindable]
private var acCity:ArrayCollection = new ArrayCollection collection;

private function initApp (): void {}
muniHS.send ();
cityHS.send ();
}

private void eHandler(e:ResultEvent):void {}
acMuni = e.result.GetAllMUNIS.MUNIS;
}

private void fHandler(e:FaultEvent):void {}
var faultInfo:String = "error code:"+ e.fault.faultCode + "\n\n"; "
"faultInfo +=" error string: "+ e.fault.faultString+"\n\n;
mx.controls.Alert.show (faultInfo, "lack of information");

var eventInfo:String = "event target:"+ e.target+"\n\n"; "
' type of event eventInfo += ":"+ e.type+"\n\n;
mx.controls.Alert.show (eventInfo, "Event information");
}

private void eCityHandler(e:ResultEvent):void {}
this.acCity = e.result.GetCITIES.CITIES;
}
[]] >
< / mx:Script >

< mx:HTTPService id = "muniHS".
URL = "" Data / GetAllMunis.Xml ""
result = "eHandler (Event)" "
Fault = "fHandler (Event)" "
showBusyCursor = "true" / >

< mx:HTTPService id = "cityHS".
URL = "" Data / CityNames.Xml ""
resultFormat ="object"
result = "eCityHandler (Event)" "
Fault = "fHandler (Event)" "
showBusyCursor = "true" / >

< mx:Panel width = "100%" height = "50%".
paddingBottom = "10".
paddingLeft = "10".
paddingRight = "10".
paddingTop = "10" title = "DataGrid" >

< mx:ComboBox id = "muniCB".
dataProvider = "{acCity}".
message = "SΘlectionner town".
labelField = 'city' / >

< mx:DataGrid id = "dg".
Width = '100% '.
Height = "100%".
dataProvider = "{acMuni}" >
< mx:columns >
< mx:DataGridColumn headerText = "municipality" dataField = "City" / >
< mx:DataGridColumn dataField = "year" / >
< mx:DataGridColumn headerText = "month" dataField = "month_no" / >
< mx:DataGridColumn headerText = "labor force" dataField = "laborforce" / >
< mx:DataGridColumn dataField = "employee" / >
< mx:DataGridColumn dataField = "unemployed" / >
< mx:DataGridColumn headerText = "unemployment rate" dataField = "unemp_rate" / >
< mx:DataGridColumn headerText = "tract" dataField = "geogkey" / >
< mx:DataGridColumn headerText = "tract extended" dataField = "geogkeyx" / >
< / mx:columns >
< / mx:DataGrid >
< / mx:Panel >
< / mx:Application >

Thanks for any help you can provide

Richard Krell

If the position meets your querstion or help, please mark it as such.

First, use XMLListCollection to the data for the ConboBox and the xlcMuni result with Manager (instead of acMuni).

Here is a simplified version of your app with the answer. It uses e4x for the filtering syntax.

http://livedocs.Adobe.com/Flex/3/HTML/Help.HTML?content=13_Working_with_XML_03.html

-CityNames.xml-



  Chicago
  New York City
  Boston

-GetAllMunis.xml-



 
    Chicago
    1866
 
 
    New York City
    1872
 
 
    Boston
    1756
 

-MainApp.mxml-


http://www.Adobe.com/2006/mxml '.
creationComplete = "muniHS.send ();cityHS.send();" » >
 
    Import mx.events.ListEvent;
Mx.rpc.events import. *;
Mx.controls import. *;
Mx.charts import. *;
Import mx.collections. *;
 
[Bindable] private var xlcMuni:XMLListCollection = new XMLListCollection;
[Bindable] private var xlcCity:XMLListCollection = new XMLListCollection;
[Bindable] private var xlcDG:XMLListCollection = new XMLListCollection;
 
private void eHandler(e:ResultEvent):void {}
this.xlcMuni = new XMLListCollection (... with e.result);
}
 
private void eCityHandler(e:ResultEvent):void {}
this.xlcCity = new XMLListCollection (e.result.city);
}
     
private void populateDG(evt:ListEvent):void {}
var temp: XMLList = xlcMuni.copy ();
xlcDG = new XMLListCollection (temp. () city is ComboBox (evt.currentTarget) .selectedItem));
}
]]>
 
 
useProxy = URL "" Data / GetAllMunis.xml ' = 'false' "
result = "eHandler (Event)" / > "
 
resultFormat = "e4x" result = "eCityHandler (event)" / > "
 
   
prompt = labelField 'Select a common' = 'city '.
change = "populateDG (Event)" / > "
   
dataProvider = "{xlcDG}" >
     
       
       
     
   
 

Tags: Adobe LiveCycle

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