APEX 4.0 -Show and able to change Primary key values for Detail

In a Master-Detail form, is there anyway I can show and able to change/select my primary keys from a select list field? One of my primary keys on the Detail is also primary key from another table which restricts my values for this field. I was able to show the fields but I can not make changes to this field and save the changes. Is there anyway I can have both show the field and able to change field's value and save it? Please advice. Thank you very much for your help in advance.
-Grace

Yes AFAIK Apex (for better or worse) was designed such that the PKs are generated automatically with PL/SQL, by a trigger, or whatever other algorithm that isn't in the control of the end user. It also only seems to allow a composite PK of no more than two columns.
My usual strategy is to:
1. Define the PK as a number (some sort of RECORD_ID, RECORD_SEQ, whatever) and populate it via a trigger on-insert.
2. Define the "business" PK as a separate unique index. This way the user can set and modify it to their heart's content and it also isn't limited to just two columns (if the composite key's business requirement is such that more than two columns are needed).

Similar Messages

EJB3: One-to-one relationships and auto-generation of primary key values...

Dear Forum,
I'm relatively new to JEE, and while I've so far enjoyed the convenience of EJB3 for most things, it seems that I have a corner case that can not be handled by the entity manager.
First, here's a quick mockup of my entities:
    Gallery
            |
            -- [1] -------[1] ----> Author
            |
            -- [1] -------[M] ---> Photo
                                              |
                                              -- [1] ------ [1] -> PhotoImage
                                                                                 |
                                                                                 -- [1] ------ [1] -> IPTCData
                                                                                 |
                                                                                 -- [1] ------ [1] -> EXIFDataI also have a remote, stateless session bean that does nothing more than persist()/merge()/remove() and locate (through find() and a few custom queries) my Gallery and Photo instances.
Now, the abridged version of my problem is this: when I persist a Photo, it naturally gets its primary key generated (I used @Id and @GeneratedValue). However, for some reason none of the other dependent entities inherit Photo's primary key value. In my client, I create a new Gallery locally and then persist it. I then create new Photo, PhotoImage, IPTCData and EXIFData instances. I add the IPTCData and EXIFData instances to PhotoImage (there are PhotoImage methods for adding those); then I add the PhotoImage instance to Photo (again, Photo has a setter for adding a PhotoImage). Then, I persist the Photo.
--- Aside: ------------
I've set up my relationships using annotations like @OneToMany (Gallery references a Collection of Photos), and @OneToOne (Photo's primary key references PhotoImage's primary key; PhotoImage's primary key references the primary keys of IPTCData and EXIFData). I've also added @JoinColumn annotations where necessary.
Finally, I get the Gallery instance's Photo collection (public Collection<Photo> getPhotos()), I add the Photo to the collection, and I add the Photo collection BACK to the Gallery (public void setPhotos(Collection<Photo>)).
At this point, the Gallery should have all of my entities contained inside of itself. However, when I persist the Gallery at this point, all of the entities show up in the database, but none of the primary keys get inherited. Photo's primary key gets generated automatically, of course, but the rest have zero (0) as their PK values. I had wanted, for example, IPTCData to get the value of Photo.id.
I had assumed that the entity manager would persist everything for me provided that I told it, through my annotations, about which entities relate to which. Does persistence only work in the direction of retrieval? That is, does the entity manager only do its thing when fetching (versus setting) data when there is more than 1 object in the graph? I can't believe that it can't, otherwise we'd all be ditching it and going back to straight SQL to do our work.
Thus, I HAVE to be doing something wrong, or else omitting to do something right.
I've made other incarnations of the above setup, and none of them have worked perfectly. I've even set up foreign key constraints in the database, but I had my share of unresolvable problems there, too.
So I guess my big question with all of this is: when you have a deeply nested graph of objects, can the entity manager figure everything out and persist all of the objects correctly and with the right values? If not, boo. If so, how does one accomplish this?
I know that I could persist each and every entity separately in my client code, but I wanted to have a natural-looking way of piecing all of my entities together. More specifically, I could persist IPTCData explicitly; however, I want to be able to add everything to a Photo and only persist the Photo itself, with the idea that all of the objects and sub-objects would be persisted automagically.
Is this possible? Or have I bought into a pipe dream with the guarantee of the proverbial magic bullet?
Thanks to everyone in advance for his/her input.
Regards,
Michael

Daniel,
Late last night I found the solution to my problem. And you're right, it had everything to do with which side is wired to which. I got confused about which side to consider the "owning" side, since one can look at it from the perspective of the database or the application.
Interestingly, the first 2 lines of your example code match my client code almost verbatim: First, I create a new Gallery (or else I get an existing one). I then create a new Photo and then add it to the Gallery's collection using add(). I then persist the Gallery. My session bean internally calls EntityManager.merge(gallery). How it differs from your example, though, is in the fact that, on an application level, a Photo has no knowledge whatsoever of a Gallery. Which is to say that my Photo class does not have a 'getGallery()' method. Somehow, Hibernate is able to figure it all out and still update Photo's 'parentIdRef' column in the database. My logs show that Hibernate issues a SQL UPDATE on the Photo after both a Gallery and a Photo have been created. It sets the Photo's 'parentIdRef' column to the primary key value of the owning Gallery.
Getting back to the matter, my problem was not with being able to map a Photo to a Gallery; rather, I was unable to add a PhotoImage to a Photo and have the relationship get correctly mapped in the database. The relationship between a Photo and a Gallery is many-to-one: there can be many Photo objects inside of a Gallery. In the database, a Photo row contains a 'parentIdRef' column whose value is that of a Gallery's primary key. I used @OneToMany on the Gallery, since a Gallery is, from an application perspective, the "owning" side, even though it's only the Photo that knows who it's referring to since only IT contains the 'parentIdRef' column in the database.
I tried setting up the relationship between a PhotoImage and a Photo in the same manner, with the PhotoImage having a 'parentIdRef' column and referring to a Photo's primary key. I had annotated the Photo's getPhotoImage() method with @OneToOne, along with an appropriate @JoinColumn.
It was THIS part that I had backwards. With a @OneToMany relationship, the child refers back to the parent --- it can be no other way. However, with a @OneToOne relationship, the owner refers to the child.
So, to make a long story short, all I had to do was create extra database columns for Photo. Those columns refer to the primary keys of PhotoImage, EXIFData and IPTCData. Concretely, for example, Photo.photoImageIdRef references PhotoImage.id. And so on and so forth.
The only negative side-effect of this is that my database-level foreign key constraints are now broken, since Hibernate wants to persist PhotoImage, EXIFData and IPTCData before it persists Photo.
I have to investigate more deeply the 'cascade=...' option of the @OneToOne annotation in order to find out it relates, if at all, to a database-level cascade.
Anyway, thanks for the reply. It seems that you had a very good idea about what my problem was. I would have posted the fact that I had resolved the problem last night, except that it was too late and I was heading to bed. If you still want the Duke points, let me know. I don't currently know the rules about if, when and to whom I should issue points in cases like these when I've already solved the problem.
Regards,
Michael

Can I change a key value?

Is there some Processor that can be used to change a key value for a cache entry? Or do I have to do a get and a put with the new key?
Thanks,
Andrew

If you haven't already looked into it, I believe the second part of your question: +"something that simply accomplishes effectively changing a key value but without the value ever being associated with two values simultaneously"+ may be closely accomplished by a TransactionMap (The transaction would wrap the get-remove-put calls):
Apart from the additional library dependencies, I believe one important caveat though is any MapListeners will be triggered on both the Remove and the subsequent Put (as they are really different entries).
Depending on your usecase, if you find that you are always "modifying the keys" perhaps they could be better served as properties of your object and instead of simple get()/put() you would additionally use an (indexed) Filter (w/ the performance cost on query).

I'm trying to sign in using my apple ID but my wife's ID shows and I cant change it

I'm trying to sign in to make an iphoto update using my apple ID but my wife's ID shows and I cant change it.

Delete iPhoto and redownload it from your Apple ID.
(81777)

Hey People! My apple id has been hacked and there was changed an email address for the apple id! so now i don't know which email it is! Please help!

My apple id has been hacked and there was changed an email address for the apple id! so now i don't know which email it is! Please help! There was bought for 50+ $ !

just try to make a new apple id with the same name. because the hacker change the email, so your apple id before is not active or not use.

Display the second report as modalform and filter with primary key value of first report when you click on first report column link

Hi All,
I have two reports.
1. order report
2. order detail report
when you click on the order report column it display the order detail report as a modal form.
i was done below steps.
1. In page header i was written the below code
<link rel="stylesheet" href = "http://ajax.googleapis.com/ajax/libs/jqueryui/1.7.2/themes/
redmond/jquery-ui.css" type="text/css" />
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.js"> </script>
<script src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.7.2/jquery-ui.js"> </script>
<script type="text/javascript">
$( function() {
$('#ModalForm1').dialog(
autoOpen : false ,
width :470,
height: 500,
resize :false,
function openForm1()
$('#ModalForm1').dialog('open');
function closeForm()
$('#ModalForm1 input[type="text"]').val('');
$('#ModalForm1').dialog('close');
</script>
2. order report.
3. order detail report
select * from order_details where order_id = p_order_id;
region header
<div id="ModalForm1" title="Ordered Items" style="display:none">
<p class="msg"></p>
footer
</div>
4. created the hidden item in order detail report.
5. in order report column attributes i was given link like below.
javascript:$s('p_order_id','#order_id#');openForm1();
when i click on the order report column link it passing the row primary key value to hiddent and open the report as modal form. however it is not filter the report with hidden item. it showing the no data found.
problem is hidden item value is not submitting. once we submit that value it showing the 2nd report with filter data.
can any help me to achieve above requirement.
apex: 4.2
oracle 11g
Regards,
Vijay.

Vijay,
Issue 1: Your usage of $s() JavaScript API seems to be wrong. For the first parameter, you need to use the name of the hidden page item and not p_order_id.
javascript:$s('P1_ORDER_ID','#ORDER_ID#');openForm1();
Issue 2: Seems like you are not setting the hidden page item's value in session state. Assuming your hidden page item is called P1_ORDER_ID, Under "Region Definition" tab of your "Order Detail Report" under "Source" tab, for page items to submit, enter the name of the hidden page item P1_ORDER_ID.
Thanks!
JMcG

Hi All,How2 delete a pkey for std table and add 2 new primary keys

Hi All,
How2 delete a pkey for std table and add 2 new primary key fields .Please provide me the required procedure .
Thanks&Regards.
Bharat.

Hi Bharat,
First thing is you need to have the access key to change any standard dictionary object/standard programs/ standard transactions.You may get this from your basis person after getting approval from your respective manager.But changing or modifying the standard object is not recommended, but if there is no alternate to meet the business requirement then we have to follow this way only.
Next, you need to check whether this table's primary key is being used in any other table as foreing key or not. If there is, then you must remove this relation and then you can delete the unncessary primary key field from that table.Finally you can add the two new fields and set them as primary key, save, check for any errors and activate.
Hope this helps.
Please reward if useful.
Thanks,
Srinivasa

Apex Form - how to enter primary key value manually?

Hi
Whenever I am creating Apex form using wizard, it asks me to specify trigger/sequence/pl/sql function for populating primary key value.
However, if I want to specify primary key myself (ie. not auto generated number), how I can specify that?
Thanx

Hello,
By Yourself you mean : by hand or by a pl/sql?
If you say by trigger, the system doesn't care about what number is send. So you can give it "manually"
May I ask what is the reason of that?
Cheers,
Arnaud

I just bought a used iMac and I'm having problems updating my apps from the app store! it shows that i am signed in, but when trying to update, the email of previous owner shows and i cannot change it! how can i fix this?

how can i change the email from previous owner of the computer to mine?

The first thing to do with a second-hand computer is to erase the internal drive and install a clean copy of OS X. You — not the previous owner — must do that. How you do it depends on the model, and on whether you already own another Mac. If you're not sure of the model, enter the serial number on this page. Then find the model on this page to see what OS version was originally installed.
1a. If you don't own another Mac
If the machine shipped with OS X 10.4 or 10.5, you need a boxed and shrink-wrapped retail Snow Leopard (OS X 10.6) installation disc from the Apple Store or a reputable reseller — not from eBay or anything of the kind. If the machine has less than 1 GB of memory, you'll need to add more in order to install 10.6. Preferably, install as much memory as it can take, according to the technical specifications.
If the machine shipped with OS X 10.6, you need the installation media that came with it: gray installation discs, or a USB flash drive for some MacBook Air models. For early MBA models, you may need a USB optical drive or Remote Disc. You should have received the media from the previous owner, but if you didn't, order replacements from Apple. A retail disc, or the gray discs from another model, will not work.
To boot from an optical disc or a flash drive, insert it, then reboot and hold down the C key at the startup chime. Release the key when you see the gray Apple logo on the screen.
If the machine shipped with OS X 10.7 or later, you don't need media. It should boot into Internet Recovery mode when you hold down the key combination option-command-R at the startup chime. Release the keys when you see a spinning globe.
1b. If you do own another Mac
If you already own another Mac that was upgraded in the App Store to the version of OS X that you want to install, and if the new Mac is compatible with it, then you can install it. Use Recovery Disk Assistant to create a bootable USB device and boot the new Mac from it by holding down the C key at the startup chime. Alternatively, if you have a Time Machine backup of OS X 10.7.3 or later on an external hard drive (not a Time Capsule or other network device), you can boot from that by holding down the option key and selecting it from the row of icons that appears. Note that if your other Mac was never upgraded in the App Store, you can't use this method.
2. Partition and install OS X
If you see a lock screen when trying to boot from installation media or in Recovery mode, then a firmware password was set by the previous owner, or the machine was remotely locked via iCloud. You'll either have to contact the owner or take the machine to an Apple Store or another authorized service provider to be unlocked. You may be asked for proof of ownership.
Launch Disk Utility and select the icon of the internal drive — not any of the volume icons nested beneath it. In thePartition tab, select the default options: a GUID partition table with one data volume in Mac OS Extended (Journaled) format. This operation will permanently remove all existing data on the drive.
After partitioning, quit Disk Utility and run the OS X Installer. If you're installing a version of OS X acquired from the App Store, you will need the Apple ID and password that you used. When the installation is done, the system will automatically reboot into the Setup Assistant, which will prompt you to transfer the data from another Mac, its backups, or from a Windows computer. If you have any data to transfer, this is usually the best time to do it.
Then run Software Update and install all available system updates from Apple. To upgrade to a major version of OS X newer than 10.6, get it from the Mac App Store. Note that you can't keep an upgraded version that was installed by the previous owner. He or she can't legally transfer it to you, and without the Apple ID you won't be able to update it in Software Update or reinstall, if that becomes necessary. The same goes for any App Store products that the previous owner installed — you have to repurchase them.
3. Other issues
If the previous owner "accepted" the bundled iLife applications (iPhoto, iMovie, and Garage Band) in the App Store so that he or she could update them, then they're irrevocably linked to that Apple ID and you won't be able to download them without buying them. Reportedly, Mac App Store Customer Service has sometimes issued redemption codes for these apps to second owners who asked.
If the previous owner didn't deauthorize the computer in the iTunes Store under his Apple ID, you wont be able to authorize it immediately under your ID. In that case, you'll either have to wait up to 90 days or contact iTunes Support.
When trying to create a new iCloud account, you might get a failure message: "Account limit reached." Apple imposes a lifetime limit of three iCloud account setups per device. Erasing the device does not reset the limit. You can still use an account that was created on another device, but you won't be able to create a new one. Contact iCloud Support for more information.

What prevents being able to change a the port for a website?

On the Web service in Server Admin I noticed that if I change the PORT for certain virtual domains from 80 to ANYTHING (like 8080, or 443) when I save, the Server Admin reports the error:
"A service has encounted an error."
And it does not accept the change. But only on 3 of my 5 domains!
What's odd is I have 5 completely different domains listed under Sites (all are root domains, no host names; eg, x1.com ... x5.com), and I can change the website's port for the 1st and the 4th domains in the list only.
The websites all work.
Anyone guess why some websites I can change the port, and others I cannot?
(Note: I started off with all websites saying the IP was x.y.x.z. I also tried to change that, and the same two websites that i can change the port will let me change the Ip to "any", and the ones that I can't change the port won't let me change the IP to 'any' either.
One off thing -- maybe related -- is that when I successfully change, say, the port on domain #1 or domain #4, after I click "save" it refreshes the screen, Server Admin has skipped to show the info on last domain.
My servers are all hosted out of their own subdirectories of the /library/websever/documents directory.
Another idea is, is there a manual way I can change JUST the port setting to see if th service can operate that way?

PS The server is 10.3.9

Input Enabled Query - Web Template - Not able to change the key figure.

Hello IP Gurus,
This is a simple question .
I have input enabled query and for all the KF's , I selected the radio button - data can be changed using user entries or planning functions , Equal Distribution and No disagrregation.
I attached the query to a web template.
When I execute the template I am not able to enter or change the key figures.
Do I have to use any planning function to do that in the web template or I am missing any configuration . Please let me know how to change or enter the key figures
Thanks
Senthil

HI Senthil,
Please ensure that u have enabled the property " start Query in changed Mode". This u can find it in the query properties under the advanced tab.
For the Input readiness this alone is not enough.You have to use all the charecteristics that u have in the multiprovider or the aggregation level over which the query is built.
regards.
Shafi.

Why doesnt itunes have the shows and movies i want to buy available for purchase in the store yet for example code lyoko and five fingers of death

I would buy these shows and movies on itunes but they are not available how can i find them on itunes or somewere else that does have the shows and movies that i watch instead of the limited amount of content on itunes store now.

Apple can only sell in a particular country's store what the content providers/rights-holders grant them licenses to sell. You can try requesting that they be added to your country's store, but unless the rights-holder agrees to it then Apple won't be able to sell them there : http://www.apple.com/feedback/itunes.html
Have you checked to see if they are available on other film/TV programme apps that you have access to ? e.g. is Netflix available in your country and have they got them ?

Is there anyway to organize icloud photo steams into abc order? and can you change the key photo image??? makes me crazy!

I am searching for ways to organize my photo streams...alphabetical preferably.
Also how do you change the key photo from something random that i did not choose to be the key photo (in the photo stream/icloud mode).
Thank you!
sue

As far as I can see, sue, the shared Photo Streams will always show the photo last added as the key photo. So just make sure the last photo you add is a photo like to see as the key photo. I do no know of any method to arrange the photo streams alphabetically. My photo streams are neither shown in chronological order nor in the order I created them.

How to update a large (over 4 million item) List(Of Byte) quickly by altering indexes contained in a Dictionary(Of Integer, Byte) where the Dictionaries keys are the indexes in the List(Of Byte) that need to be changed to the values for those indexes?

   I'm having some difficulty with transferring images from a UDP Client to a UDP Server. The issue is receiving the bytes necessary to update an original image sent from the Client to the Server and updating the Servers List(Of Byte) with the
new bytes replacing bytes in that list. This is a simplex connection where the Sever receives and the Client sends to utilize the least amount of bandwidth for a "Remote Desktop" style application where the Server side needs image updates of whatever
occurs on the Client desktop.
   So far I can tranfer images with no issue. The images can be be any image type (.Bmp, .Gif, .JPeg, .Png, etc). I was working with sending .JPeg's as they appear to be the smallest size image when a Bitmap is saved to a memory stream as type
.JPeg. And then I am using GZip to compress that byte array again so it is much smaller. However on a loopback on my NIC the speed for sending a full size screen capture is not very fast as the Server updates fairly slowly unless the Clients screen capture
Bitmap is reduced in size to about 1/3'd of the original size. Then about 12000 bytes or less are sent for each update.
   Due to .JPeg compression I suppose there is no way to get the difference in bytes between two .JPegs and only send those when something occurs on the desktop that alters the desktop screen capture image. Therefore I went to using .Bmp's as each
.Bmp contains the same number of bytes in its array regardless of the image alterations on the desktop. So I suppose the difference in bytes from a second screen capture and an inital screen capture are what is different in the second image from the initial
image.
   What I have done so far is save an initial Bitmap of a screen capture using a memory stream and saving as type .Bmp which takes less than 93 milliseconds for 4196406 bytes. Compressing that takes less than 118 milliseconds to 197325 bytes for
the current windows on the desktop. When that is done PictureBox1 is updated from nothing to the captured image as the PictureBox's background image with image layout zoom and the PictureBox sized at 1/2 my screens width and 1/2 my screens height.
   Then I save a new Bitmap the same way which now contains different image information as the PictureBox is now displaying an image so its back color is no longer displayed (solid color Aqua) and the cursor has moved to a different location. The
second Bitmap is also 4196406 in bytes and compressed it was 315473 bytes in size.
   I also just found code from this link Converting a Bitmap to a Byte Array (and Byte Array to Bitmap) which gets a byte array
directly from a Bitmap and the size of that is 3148800 for whatever is full screen captured on my laptop. So I should be able to work with smaller byte arrays at some point.
   The issue I'm having is that once the Client sends an image of the desktop to the Server I only want to update the server with any differences occuring on the Clients desktop. So what I have done is compare the first screen captures bytes (stored
in a List(Of Byte)) to the second screen captures bytes (stored in a List(Of Byte)) by using a For/Next for 0 to 4196405 where if a byte in the first screen captures List is not equal to a byte in the second screen captures List I add the index and byte of
the second screen captures list to a Dictionary(Of Integer, Byte). The Dictionary then only contains the indexes and bytes that are different between the first screen capture and second screen capture. This takes about 125 milliseconds which I think is pretty
fast for 4196406 byte comparison using a For/Next and adding all the different bytes and indexes for each byte to a Dictionary.
    The difference in Bytes between the inital screen capture and the second screen capture is 242587 as an example which changes of course. For that amount of bytes the Dictionary contains 242587 integers as indexes and 242587 bytes as different
bytes totaling 485174 bytes for both arrays (keys, values). Compressed the indexes go from 242587 to 43489 bytes and the values go from 242587 to 34982 bytes. Which means I will have to send 78, 481 bytes from the Client to the Server to update the display
on the server. Quite smaller than the original 4196406 bytes of the second Bitmap saved to type .Bmp or the compressed size of that array which was 315473 bytes. Plus a few bytes I add as overhead so the server knows when an image array ends and how many packets
were sent for the array so it can discard complete arrays if necessary since UDP is lossfull although probably not so much in current networks like it may originally have been when the internet started.
    In reality the data from the Client to the Server will mostly be the cursor as it moves and updating the Server image with only a few hundred bytes I would imagine at a time. Or when the cursor selects a Button for example and the Buttons
color changes causing those differences in the original screen capture.
   But the problem is if I send the Dictionaries Indexes and Bytes to the Server then I need to update the original Bitmap List(Of Byte) on the server by removing the Bytes in the received informations Index locations array from the Servers Bitmap
List(Of Byte) and replacing those Bytes with the Bytes in the received informations Byte array. This takes so long using a For/Next for however many indexes are in the received informations Index array to update the Bitmap List(Of Byte) on the server using
"Bmp1Bytes.RemoveAt(Index As Integer)" followed by "Bmp1Bytes.Insert(Index As Integer, Item As Byte)" in the For/Next.
    I've tried various For/Next statements including using a new List(Of Byte) with If statements so If the the integer for the For/Next ='s the Key in a Dictionary(Of Integer, Byte) using a Counter to provide the Dictionaries Key value then
the Dictionaries byte value will be added to the List(Of Byte) and the counter will increas by one Else the List(Of Byte) adds the original "Bmp1Bytes" byte at that index to the new List(Of Byte). This takes forever also.
   I also tried the same For/Next adding to a new Dictionary(Of Integer, Byte) but that takes forever too.
   I think I could use RemoveRange and AddRange to speed things up. But I don't know how to retrieve a contiguous range of indexes in the received indexes that need to be updated in the servers "Bmp1Bytes" List(Of Byte) from the received
array of indexes and bytes which are in a Dictionary(Of Integer, Byte). But I believe this would even be slower than some realistic method for replacing all Bytes in a List(Of Byte) when I have the indexes that need to be replaced and the bytes to replace
them with.
   Even if I just used AddRange on a new List(Of Byte) to add ranges of bytes from the original "Bmp1Bytes" and the changes from the Dictionary(Of Integer, Byte) I think this would be rather slow. Although I don't know how to do that
by getting contiguous ranges of indexes from the Dictionaries keys.
   So I was wondering if there is some method perhaps using Linq or IEnumerable which I've been unable to figure anything out which could do this.
   I do have some copy and pasted code which I don't understand how it works that I am using which I would guess could be altered for doing something like this but I can't find information that provides how the code works. Or even if I did
maybe I can't understand it. Like the code below which is extremely fast.
   Dim strArray() As String = Array.ConvertAll(Of Integer, String)(BmpComparisonDict.Keys.ToArray, Function(x) x.ToString())
La vida loca

Monkeyboy,
That was quite a bit to read, but still a bit unclear. Could you put a specific list of goals/questions, asked in the smallest possible form?
It seems like either you're making a program that monitors activity on your computer, or you're writing some kind of remote pc app.
When you do get your bytes from using lockbits, keep in mind all the files header info would be lost. I think retaining the header info is worth the extra bytes.
The other, thing: I'm not sure if you're taking 32bpp screen shots, but also keep in mind that the "whole desktop" is the final destination for blended graphics, if that makes sense. What I mean is that there is no need to capture an "alpha"
channel for a desktop screenshot, as alpha would always be 255, this could save you 1 byte per pixel captured... Theres nothing "behind" the desktop, therefore no alpha, and every window shown above the desktop is already blended. I suggest using
24Bpp for a full screen capture.
Your X,Y information for the mouse could be stored as UINT16, this would save you a measly 2 bytes per location update/save.
When you update your byte arrays, maybe you can turn the array into a stream and write to whatever index, however many bytes, that should prevent a "Shift" of bytes, and instead overwrite any bytes that "get in the way".
ex
Dim example As String = "This is an example."
Dim insertString As String = "was"
Dim insertBytes As Byte() = System.Text.Encoding.ASCII.GetBytes(insertString)
Dim bytes As Byte() = System.Text.Encoding.ASCII.GetBytes(example)
Dim modifiedBytes As Byte() = {}
Using ms As New System.IO.MemoryStream(bytes)
ms.Position = 5
ms.Write(insertBytes, 0, 3)
modifiedBytes = ms.ToArray
End Using
Dim newString As String = System.Text.Encoding.ASCII.GetString(modifiedBytes)
'Notice how below there isn't the word "is" anymore, and that there isn't a
'space.
'This demonstrates that you overwrite existing data, versus shifting everything to
'the right.
'Returns: This wasan example.
MsgBox(newString)
“If you want something you've never had, you need to do something you've never done.”
Don't forget to mark
helpful posts and answers
! Answer an interesting question? Write a
new article
about it! My Articles
*This post does not reflect the opinion of Microsoft, or its employees.
Well it's too much to read. I was really tired when I wrote it. Even the below is too much to read but perhaps gets the point across of what I would like to do which I think
Joel Engineer may have answered but I'm not sure. As I'm still too tired to understand that yet and research what he said in order to figure it out yet.
But maybe the code below can provide the concept of the operation with the comments in it. But seeing as how I'm still tired it may be confused.
Option Strict On
Imports System.Windows.Forms
Imports System.IO
Imports System.IO.Compression
Imports System.Drawing.Imaging
Imports System.Runtime.InteropServices
Public Class Form1
Dim Bmp1Bytes As New List(Of Byte)
Dim Bmp1BytesCompressed As New List(Of Byte)
Dim Bmp2Bytes As New List(Of Byte)
Dim BmpComparisonDict As New Dictionary(Of Integer, Byte)
Dim BmpDifferenceIndexesCompressed As New List(Of Byte)
Dim BmpDifferenceBytesCompressed As New List(Of Byte)
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
SomeSub()
End Sub
Private Sub SomeSub()
' Pretend this code is in UDP Client app. A screen capture is performed of the desktop. Takes about 90 milliseconds.
Bmp1Bytes.Clear()
Using BMP1 As New Bitmap(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height)
Using g1 As Graphics = Graphics.FromImage(BMP1)
g1.CopyFromScreen(0, 0, 0, 0, BMP1.Size)
Cursor.Draw(g1, New Rectangle(Cursor.Position.X, Cursor.Position.Y, Cursor.Size.Width, Cursor.Size.Height))
Using MS As New MemoryStream
BMP1.Save(MS, System.Drawing.Imaging.ImageFormat.Bmp)
Bmp1Bytes.AddRange(MS.ToArray)
End Using
End Using
End Using
Bmp1BytesCompressed.AddRange(Compress(Bmp1Bytes.ToArray))
' UDP Client app sends Bmp1BytesCompressed.ToArray to UDP Server which is the entire image of the desktop that the UDP
' Client is on. This image takes awhile to send since compressed it is about 177000 bytes from over 4000000 bytes.
' I will be using different code just to get the bytes from the actual Bitmap in the future. That is not important for now.
' Pretend the UDP Server has received the bytes, decompressed the array received into a List(Of Byte) and is displaying
' the image of the UDP Clients desktop in a PictureBox.
' Now the image on the UDP Clients desktop changes due to the mouse cursor moving as an example. Therefore a new Bitmap
' is created from a screen capture. This takes about 90 milliseconds.
Bmp2Bytes.Clear()
Using BMP2 As New Bitmap(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height)
Using g1 As Graphics = Graphics.FromImage(BMP2)
g1.CopyFromScreen(0, 0, 0, 0, BMP2.Size)
Cursor.Draw(g1, New Rectangle(Cursor.Position.X, Cursor.Position.Y, Cursor.Size.Width, Cursor.Size.Height))
Using MS As New MemoryStream
BMP2.Save(MS, System.Drawing.Imaging.ImageFormat.Bmp)
Bmp2Bytes.AddRange(MS.ToArray)
End Using
End Using
End Using
' Now I have the original images bytes in Bmp1Bytes and the new images bytes in Bmp2Bytes on the UDP Client. But I don't
' want to send all of the bytes in Bmp2Bytes to the UDP Server. Just the indexes of and the bytes that are different in
' Bmp2Bytes from Bmp1Bytes.
' This takes less than 100 milliseconds for what I've tested so far where over 500000 bytes in Bmp2Bytes are different
' than the bytes in Bmp1Bytes. Usually that amount would be much less. But during testing I was displaying the image
' from Bmp1 bytes in a PictureBox so a large amount of data would change between the first screen shot, the PictureBox
' then displaying an image on the same PC and then the second screen shot.
BmpComparisonDict.Clear()
For i = 0 To Bmp1Bytes.Count - 1
If Bmp1Bytes(i) <> Bmp2Bytes(i) Then
BmpComparisonDict.Add(i, Bmp2Bytes(i))
End If
Next
' So now I have all the difference bytes and their indexes from Bmp2Bytes in the BmpComparisonDict. So I compress
' the indexes into on List and the Bytes into another List.
BmpDifferenceIndexesCompressed.Clear()
BmpDifferenceBytesCompressed.Clear()
BmpDifferenceIndexesCompressed.AddRange(Compress(BmpComparisonDict.Keys.SelectMany(Function(d) BitConverter.GetBytes(d)).ToArray()))
BmpDifferenceBytesCompressed.AddRange(Compress(BmpComparisonDict.Values.ToArray))
' Now pretend the UDP Client has sent both those arrays to the UDP Server which has added both decompressed arrays
' to a Dictionary(Of Integer, Byte). And the server has the original image decompressed bytes received in a List
' called Bmp1Bytes also.
' This is where I am stuck. The UDP Server has the Dictionary. That part was fast. However there is no
' fast method I have found for creating a new List(Of Byte) where bytes in the originally received List(Of Byte) that
' do not have to be altered are placed into a new List(Of Byte) except for the indexes listed in the
' Dictionary(Of Integer, Byte) that need to be placed into the appropriate index locations of the new List(Of Byte).
' The below example for doing so is exceptionally slow. Pretend UpdateDictionary has all of the decompressed indexes
' and bytes received by the UDP Server for the update contained within it.
Dim UpdateDictionary As New Dictionary(Of Integer, Byte)
Dim UpdatedBytes As New List(Of Byte)
Dim Counter As Integer = 0
For i = 0 To Bmp1Bytes.Count - 1
If i = UpdateDictionary.Keys(Counter) Then ' Provides the index contained in the Keys for the Dictionary
UpdatedBytes.Add(UpdateDictionary.Values(Counter))
Counter += 1
If Counter > UpdateDictionary.Count - 1 Then Counter = 0
Else
UpdatedBytes.Add(Bmp1Bytes(i))
End If
Next
' So what I'm trying to do is find an extremely fast method for performing something similar to what the
' above operation performs.
End Sub
Private Function Compress(BytesToCompress() As Byte) As List(Of Byte)
Dim BytesCompressed As New List(Of Byte)
Using compressedStream = New MemoryStream()
Using zipStream = New GZipStream(compressedStream, CompressionMode.Compress)
zipStream.Write(BytesToCompress, 0, BytesToCompress.Count)
zipStream.Close()
BytesCompressed.AddRange(compressedStream.ToArray)
End Using
End Using
Return BytesCompressed
End Function
Private Function Decompress(BytesToDecompress() As Byte) As List(Of Byte)
Dim BytesDecompressed As New List(Of Byte)
Using DecompressedStream = New MemoryStream()
Using zipStream = New GZipStream(DecompressedStream, CompressionMode.Decompress)
zipStream.Write(BytesToDecompress, 0, BytesToDecompress.Count)
zipStream.Close()
BytesDecompressed.AddRange(DecompressedStream.ToArray)
End Using
End Using
Return BytesDecompressed
End Function
End Class
La vida loca

How to change primary keys of existing InfoCube.

Greetings everyone!
Im trying to change the Key Fields in my reporting architecture as per our new company mandate. Ive been able to successfully change the primary keys for DS, DSO and InfoSource. Can any kind soul out there please tell me how to change the primary keys on an existing InfoCube? I will surely appreciate all the assistance I can get. Its kinda urgent!
Regards,
Philips

Hi,
Check the possibility with Remodelling option . If it is not possible with Remodelling, then you can only change the cube deleting the Data.
With rgds,
Anil Kumar Sharma .P

APEX 4.0 -Show and able to change Primary key values for Detail

Similar Messages

Maybe you are looking for