Question

I have a graph component in Flex and my end-user wants to be able to manipulate this control in Flex, and then export the result into Powerpoint. I don’t have a problem exporting an Image to Powerpoint, but where I am running into a problem is with exporting the Flex component to a .NET web service. Here is the code I have come up with…

The Web Service Declaration:

<mx:WebService id='ws' wsdl='http://localhost:59228/CreateImageService.asmx?wsdl'> <mx:operation name='CreateImage' resultFormat='xml'/> </mx:WebService> 

The Flex code:

    private function btnCreateImage():void {     var imageSnap:ImageSnapshot = ImageSnapshot.captureImage(TeamChart);     var imageByteArray:ByteArray = imageSnap.data as ByteArray;      ws.CreateImage(imageByteArray);      //swfLoader.load(imageByteArray);  } 

And the Web Service code:

    [WebMethod]     public void CreateImage(byte byteArrayin)     {         CreateImage createImage = new CreateImage();         createImage.byteArrayToImage(byteArrayin);     } 

I know the component is being converted successfully to a ByteArray because I can use SWFLoader() to make it reappear within the Flash canvas. If I try to send the bytearray to the .NET web servie, I get a SOAP errr. If I submit a 0 to the web service, this will at least hit the web service.

I’m not quite sure where the problem is, but I fear it’s something simple that I’m overlooking.

Much appreciated,

-Matt

Answer 1

I figured it out. I had to encode the image as a base64 string and send it to .NET that way. Here is my code:

Flex:

private function btnCreateImage():void {     var imageSnap:ImageSnapshot = ImageSnapshot.captureImage(TeamChart);     var image64BitText:String = ImageSnapshot.encodeImageAsBase64(imageSnap);      ws.CreateImage(image64BitText);      //swfLoader.load(imageByteArray);  } 

.NET Web Service

public Image byteArrayToImage(string base64ImageString) {     // Convert Base64 String to byte[]     byte[] imageBytes = Convert.FromBase64String(base64ImageString);     MemoryStream ms = new MemoryStream(imageBytes, 0,       imageBytes.Length);      // Convert byte[] to Image     ms.Write(imageBytes, 0, imageBytes.Length);     Image image = Image.FromStream(ms, true);     return image; }