Flex to SQL server

Question

Hai
I am very new to Flex.
I am trying to connect Flex to remote SQL server database.
I have seen few blogs but getting confused.
Can someone post an example to connect to remote SQL server database, get the data to xml and populate datagrid/list from it.
I am using Flex 4.
Thanks a lot..

Answer 1

Here is how I use HTTPService Objects. I am new to FLEX too, only 2 months in and I am launching a pretty huge app next week...
Anyways, first you define your HTTPService Object(s). You can do this in ActionScript or MXML. Here I am defining them in MXML, in the Declaration section of my MXML component, like so:
1. declare HTTPService Object
<fx:Declarations>
        <s:HTTPService id="setSomeDataSRV"/>
        <s:CallResponder id="setSomeDataSRVResult" result="setSomeDataSRVResult_resultHandler(event)"/>
</fx:Declarations>
^ you can specify many parameters here, like URL, result, etc. These are rather empty and do not use many of the attributes available. I initialize those later, in AS3 code. You can see two objects, a HTTPService and a CallResponder. The CallResponder basically listens and receives focus after the HTTPService is invoked and run. The CallResponder has a result method, setSomeDataSRVResult_resultHandler(event). This is where the code jumps after the HTTPService is run. We will get to that in a minute.
2. In ActionScript/CDATA script section in the same component, I have the following function:
            private function executeSomeDataWebService():void {
                if (_someDataChanged) {
                    var params:Object = {};
                    params["UserID"] = lblUserID.text;
                    params["Parameter2"] = lblParameter2.text;
                    params["Parameter3"] = someDataNumStepper.value.toString();
                    params["Parameter4"] = _userTempType.data.tempValue;
                    setSomeDataSRV.url = "http://255.255.255.255:8060/MyServiceLayer/MyDataService.asmx/MyWebServicesNameHere";
                    setSomeDataSRVResult.token = setSomeDataSRV.send(params);
255.255.255.255:8060 needs to be your actual Server URL. This is only example stuff.
3. here is the result handler, in Action Script 3. This gets called back when the HTTPService is completed:
            private function setSomeDataSRVResult_resultHandler(event:ResultEvent):void {
                Alert.show('someData web service invokation was succesful');
I hope this can put you in the right direction. May the FLEX force be with you.