I just wrote up a simple C# web service that accepts an ArrayList:
[WebMethod]
public bool ArrayListTest(System.Collections.ArrayList a)
{ ... }
Then in Flex I wrote this,
<mx:Script>
<![CDATA[
import mx.collections.ArrayCollection;
private function sendWebServiceCall():void
{
trace("appComplete");
ws.ArrayListTest(new ArrayCollection([
{name:"bob", id:"808" }, {
name:"fred", id:"" }]));
}
]]>
</mx:Script>
<mx:WebService wsdl="http://localhost:63868/Service1.asmx?WSDL"; id="ws">
<mx:operation name="ArrayListTest" result="trace(event.result)"
fault="trace(event.fault.faultString)"/>
</mx:WebService>
When sendWebServiceCall is triggered, it calls the C# web service and
passes the ArrayCollection to it.
In the web service, the ArrayCollection is received as an array list
of XmlNodes. Each XmlNode contains a node for each field, even if it
is an empty string.
<tns:id xmlns:tns="http://tempuri.org/";>808</tns:id>
<tns:name xmlns:tns="http://tempuri.org/";>bob</tns:name>
<tns:id xmlns:tns="http://tempuri.org/";></tns:id>
<tns:name xmlns:tns="http://tempuri.org/";>fred</tns:name>
Is this anything like what you're getting? The edge case you described
in another email about an empty string causing problems doesn't seem
to cause problems.
Also see inline.
2009/7/3 Angelo Anolin <angelo_ano...@yahoo.com>:
> I think by doing things like this, it may not be the best way.
>
> You mentioned you'd map the XML to typed objects in .NET. How can I do
> this?
As you're using a dataset, this isn't really an option. A dataset as
opposed to a collection of typed objects are two ways of handling data
from data sources; it is arguable which way is better.
The problem in your case, is that the XML generated as a result of
passing an ArrayCollection to a web service method cannot be passed
into the dataset's readXml method. (Even if it could by inferring a
schema, it would be different to your database's schema.)
The only way I know of to do seamless transfer of data without having
to parse XML is to use WebORB. Otherwise you will have to parse the
XML produced on both sides to re-create the dataset/object.
> Instead of using arraycollection as dataprovider in my datagrid, can I use
> another which would be much easier when I pass back to the .NET function?
I wonder if it is possible to bind your datagrid directly to the e4x
XML? That way you can pass the entire XML doc back to .NET via the web
service, and hence you can re-create the dataset using
dataset.readXML.
> ________________________________
> From: Sam Lai <samuel....@gmail.com>
> To: flexcoders@yahoogroups.com
> Sent: Friday, 3 July, 2009 13:52:12
> Subject: Re: [flexcoders] ArrayCollection Does Not Show Items In Order When
> Passed to .NET WebService
>
> Instead of using an array list and trying to emulate the type-less
> abilities of AS3, I'd try to map the XML to typed objects in .NET. Or
> does the XML from your Flex app differ too wildly to do this?
>
> Are you using the XmlSerializer to deserialize this? Or are you using
> WCF? Or are you doing it some other way, or manually?
>
> I'd provide an example, but I don't know enough details on your
> situation to give something useful :)
>
> 2009/7/3 Angelo Anolin <angelo_anolin@ yahoo.com>:
>>
>>
>> Hi Sam,
>>
>> Care to show some examples? I am parsing the arrayCollection into an
>> ArrayList on .NET. This is particularly not too appealing since I just
>> discovered that for example, if one of the objects in the arraycollection
>> would have an empty string value, the number of items inside the array is
>> not reflected properly in .NET.
>>
>> Like:
>>
>> private var arrR:ArrayCollectio n = new ArrayCollection( [{ID:"001" ,
>> Value:"Select" },
>> {ID:"002",
>> Value:"Choose" },
>> {ID:"003",
>> Value:""},]) ;
>>
>> When I pass this var arrR into a .NET webservice and delegate it to an
>> ArrayList, the items in the array list will have one of the arrays only
>> containing 1 item (instead of 2).
>>
>> Adding to my problem is the fact that the arrays inside the array list
>> when
>> read in .NET should have the object ID and Value be in order but they are
>> not. This is further true when there are many items in the array
>> collection. Sometimes, the first item becomes the last one in the array
>> list, and sometimes the order is not well.
>>
>> In any case, I am finding a solution on how I would be able to pass an
>> ArrayCollection to .NET and be able to parse it properly.
>>
>> Thanks.
>>
>> ____________ _________ _________ __
>> From: Sam Lai <samuel....@gmail. com>
>> To: flexcod...@yahoogro ups.com
>> Sent: Thursday, 2 July, 2009 15:46:58
>> Subject: Re: [flexcoders] ArrayCollection Does Not Show Items In Order
>> When
>> Passed to .NET WebService
>>
>> How is it being parsed in .NET? You can parse it into a hashtable, or
>> better yet, use a pre-defined object.
>>
>> Not sure why the order is different, but it is probably fragile to
>> rely on the order in this case.
>>
>> 2009/7/2 Angelo Anolin <angelo_anolin@ yahoo.com>:
>>>
>>>
>>> Hi FlexCoders,
>>>
>>> I have an array collection which I am populating as follows:
>>>
>>> var oTemp:Object;
>>> var xl:XMLList = _xmlData.children( );
>>> var i:int;
>>> for(i = 0; i < xl.length(); i++)
>>> {
>>> oTemp = {ID_TAG:xl[i] .ID.text( ), CAT_TAG:xl[i] .CAT.text( ),
>>> DET_TAG:xl[i] .DET.text( ), REP_DATE_TAG: xl[i].REP_ DATE.text( ),
>>> IND_TAG:xl[i] .IND.text( )};
>>> arrDP.addItem( oTemp);
>>> }
>>> Now, when I pass back this Array Collection back into a web service, the
>>> fields are not in order as I have added them into the array collection.
>>>
>>> I am expecting that in my Web Service, when I parse this arraycollection
>>> (via arraylist), I would be getting the same order of columns as I have
>>> added them, i.e. the first array in the array list would have element 0
>>> to
>>> be the value I placed in the ID.
>>>
>>> Since the arraylist does not have the field tag (represented by ID_TAG,
>>> DET_TAG, CAT_TAG, etc..), it becomes a trial and error (hit and miss) on
>>> my
>>> part since I can only reference the value via the index on the array.
>>>
>>> Now, how would I be able to include the tags inside array collection such
>>> that when I read them as an array list in my .NET webservice, I know
>>> which
>>> element I am referring to in a particular index.
>>>
>>> Thanks.
>>>
>>> Regards,
>>> Angelo
>>>
>>>
>>>
>>
>>
>>
>>
>
>
>
>
