The following example shows how you can browse for an image file from your local file system and preview the image before uploading it to a remote webserver by using the FileReference class’s new load() method in Flash Player 10. Once the user has browsed and selected an image from their local machine, you can call the load() method which dispatches a complete event when the image has successfully loaded, at which point you can display the image using a Flex Image control and setting the Image instance’s source property to the FileReference class’s data property (which is a ByteArray).
Full code after the jump.
Continue reading ‘Previewing an image before uploading it using the FileReference class in Flash Player 10′
The following example shows how you can use the FileReference class’s new save() method in Flash Player 10 to save text, XML, and image files to a user’s hard drive.
Full code after the jump.
Continue reading ‘Saving files locally using the FileReference class’s save() method in Flash Player 10′
The following example shows how you can define a FileReference object in MXML by defining a custom namespace for the flash.net package.
Full code after the jump.
Continue reading ‘Creating a FileReference object using MXML in Flex’
The previous example, “Using the URLVariables and FileReference classes to pass data from Flex to a server-side script”, showed how you could use the upload() method in the FileReference class along with the URLRequest and URLVariables classes to send data from your Flex application to a server-side script. Well, what happens if you want to send data from your server-side script back to your Flex application? Say hello to the uploadCompleteData event! This event gets dispatched after data is received from the server after a successful upload.
The uploadCompleteData event is not dispatched if data is not returned from the server.
The following example shows how you can set up an event listener for the uploadCompleteData event to display information about the file upload.
Full code after the jump.
Continue reading ‘Using for the FileReference class’s uploadCompleteData event to capture data from a server-side script’
We’ve already seen examples of using Flex to upload and download files (see “Uploading files in Flex using the FileReference class” and “Downloading files in Flex using the FileReference class”), but I’ve seen a lot of bugs/questions centering around the FileReference class lately so thought I’d try and do another example or two.
The following example shows how you can use a combination of the URLVariables, URLRequest, and FileReference classes to pass GET or POST variables to a server-side script while doing a file upload. In this example, we just happen to pass a simple text userID and the user’s Flash Player version, but it should be easy enough to modify the script slightly to pass more unique information to the server (such as a unique user token stored in a SharedObject or a browser cookie). I also added a crude little timer on the example to make it a bit classier.
Full code after the jump.
Continue reading ‘Using the URLVariables and FileReference classes to pass data from Flex to a server-side script’
