Can Read but Can't Write to a Database

hi...i'm fairly new to java and have a problem w/ a database program i have written...i'm running windows xp along w/ access xp...the program i wrote works fine on my computer, however, the program is for my brother and on his computer it only reads from the database but can't write to it...unfortunately i packed the program in a jar file so when u run the program no console comes up to display the exceptions...he is running windows 98 (first edition) and doesn't have any version of access on his computer...i figure his odbc driver is out of date or something like that but i wouldn't know where to start to tackle this problem...any help w/ be very much appreciated...thank you...

Ask him to start the app via the command line/redirect (see [url http://java.sun.com/j2se/1.4.2/docs/api/java/lang/System.html#setErr(java.io.PrintStream)]System.setErr() to a file, or use a better logging method than you are now (more info in the catches, use [url http://java.sun.com/j2se/1.4.2/docs/api/java/util/logging/package-frame.html]java.util.logging ).

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DVD will read but won't write A205-S5812

My DVD drive will read and play but won't write. Device Manager says it is a Matshita UJ-850S. I have upgraded to XP Pro sp3 from vista. I suspect that it is a driver issue but I have searched and can't find one that makes it work.
Has anyone else run into this? Any suggestions
Solved!
Go to Solution.

Borsiay wrote:
My DVD drive will read and play but won't write. Device Manager says it is a Mat**bleep**a UJ-850S. I have upgraded to XP Pro sp3 from vista. I suspect that it is a driver issue but I have searched and can't find one that makes it work.
Has anyone else run into this? Any suggestions
Not a driver issue, or it wouldn't even read. You are missing the program required for disk writing that Toshiba suppiles with factory installs, but is lacking in commercial versions of Windows. It is not available as a download, only as part of the factory image. Since you changed to XP, You'll need to buy some disk writing software like Nero or Roxio.

Macbook Reads but Doesn't Write

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MATSHITA DVD-R UJ-857E:
Firmware Revision: ZF1E
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Php/mysql: can't write to mysql database [SOLVED]

I'm writing a login script using php and mysql. I got it to work on my server about a week ago, and then I set up apache, php and mysql on my netbook so that I could take my code with me and test it. Now it doesn't work. My registration script doesn't write to the mysql database but has no errors. Here is register.php:
<?php
define("DB_SERVER", "localhost");
define("DB_USER", "root");
define("DB_PASS", "swordfish");
define("DB_NAME", "users");
define("TBL_USERS", "users");
$connection = mysql_connect(DB_SERVER, DB_USER, DB_PASS) or die(mysql_error());
mysql_select_db(DB_NAME, $connection) or die(mysql_error());
function addUser($username, $password)
global $connection;
$password = md5($password);
echo("adding $username,$password<br />");
$q = "INSERT INTO " . TBL_USERS . " VALUES ('$username', '$password')";
echo("query: $q<br />");
$result = mysql_query($q, $connection);
echo("$result<br />");
if (isset($_POST["reg"]))
addUser($_POST["username"], $_POST["password"]);
echo("<a href='index.php'>click here to login</a>");
?>
<html>
<head>
<title>Register</title>
</head>
<body>
<form method="Post" name="login">
<input type="text", name="username" /> Username<br />
<input type="text", name="password" /> Password<br />
<input type="submit" name="reg", value="Register" />
</form>
</body>
</html>
and here is the output (without the form):
adding lexion,6f1ed002ab5595859014ebf0951522d9
query: INSERT INTO users VALUES ('lexion', '6f1ed002ab5595859014ebf0951522d9')
Also, I tried manually adding the content to the database:
$ mysql -p -u root
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 9
Server version 5.1.42 Source distribution
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> users
-> INSERT INTO users VALUES('lexion', 'foo')
-> ^D
-> Bye
I would assume that I got something wrong with the last bit, but the php script seems like it should work. Does anybody know why it doesn't?
Last edited by Lexion (2010-01-10 19:04:15)

What is wrong with your PHP? Why do you think it is failing? An INSERT query doesn't return anything. Also, it's a good idea to specify which fields you are inserting into, unless you want to have to provide something for every field (tedious for tables with many fields with default values). eg:
$q = "INSERT INTO `" . TBL_USERS . "`(`username`, `password`) VALUES ('$username', '$password')";
As for your experiment with the mysql prompt; queries have to end with a semicolon. PHP is nice and hides that little detail from you.
edit: Also, you're echoing text out before the HTML starts. That won't produce valid HTML. I also noticed a few other things which I corrected; look at my comments:
<?php
define("DB_SERVER", "localhost");
define("DB_USER", "root");
define("DB_PASS", "swordfish");
define("DB_NAME", "users");
define("TBL_USERS", "users");
$connection = mysql_connect(DB_SERVER, DB_USER, DB_PASS) or die(mysql_error());
mysql_select_db(DB_NAME, $connection) or die(mysql_error());
function addUser($username, $password)
global $connection;
$password = md5($password);
// echo("adding $username,$password<br />"); - Don't echo stuff before HTML starts.
// Also, clean up user-supplied data before plugging it into a query unless you want to be vulnerable to SQL injection.
$cleanusername = mysql_real_escape_string($username, $connection);
$cleanpassword = mysql_real_escape_string($password, $connection); // Obviously you'd generally use some hashing algorithm like md5 or sha1 for passwords
$q = "INSERT INTO `" . TBL_USERS . "`(`username`, `password`) VALUES ('{$cleanusername}', '{$cleanpassword}')"; // The backticks tell MySQL not to interpret any text within as a keyword (good for field names, eg a field called `date`. The curly brackets tell PHP that the stuff within refers to a variable; it's nice as PHP knows exactly what the variable name is with no possible ambiguity.
// echo("query: $q<br />");
$result = mysql_query($q, $connection);
// echo("$result<br />"); - This won't do anything; in addition to INSERT queries not returning anything, the $result variable doesn't contain the results of the query, it's a pointer to them for use with mysql_result().
?>
<html>
<head>
<title>Register</title>
</head>
<body>
<?php
if (isset($_POST["reg"]))
addUser($_POST["username"], $_POST["password"]);
echo("<a href='index.php'>click here to login</a>");
?>
<form method="Post" name="login">
<input type="text" name="username" /> Username<br />
<input type="text" name="password" /> Password<br />
<input type="submit" name="reg" value="Register" />
</form>
</body>
</html>
<?php
mysql_close($connection); // Not strictly needed, as PHP will tidy up for you if you forget.
?>
Last edited by Barrucadu (2010-01-10 17:34:20)

My DVD drive reads but does not write/copy (Satellite A60)

I need help,I use a laptop Satellite A60-106 series
and my dvd writer has stop writing it only copies about 3% and stops. I use both nero and roxio,
Please help me.
You can reply to [email protected]

Hello Alfred
As far as I know the small control light appear just if the drive is in use. In your case it is on constantly and in my opinion there is some problem with the device. Like Ivan already said try to remove it from device manager and let the system detect it again.
I am pretty sure that warranty is still valid and you should contact service partner in your country. Let them check the unit.
Bye

LaCie ext RW drive reads but won't write

I want to burn something on the LaCie ext drive but it won't work. I've done it a ton of times before, but now any one of the multiple virgin CD discs that I put in (and am sure are correct and for writing) fail to show up on Toast. Also, on disc utility it says that the CD is for "read only" -- which ain't so! Think the drive just needs replaced?? (It's about 3-4 years old.) Thanks.

Dear Cine Alter,
If the two drives are appearing on your desktop that would suggest physical connections are OK. If you have not already done so, start up from you OSX CD and rebuild your directory. Then rebuild Permissions, Restart and see how you go. This process should clean up any directory corruptions which may be responsible for the problem. You should run both of these programs monthly to ensure corruptions do not creep into your system.
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How can I write to 4 different tables in database at the same time

I have .mdb file which has 4 tables for each hardware, I have a labview main program which calls 4 sub programs for each hardware, all these 4 subprograms run parallely.
One might finish one test early or late by milli seconds or seconds, the data has to be written to database file which has 4 tables inside.
I am planning to open reference in main program and use the reference in sub programs, I will write to Table 1 for first sub program , table 2 for second sub program and so on,
My question is can we write into one database file having 4 tables parallely/simulataneously? If no why?

Try it. It should work. As long as you are opening the database once, and passing the reference around, I don't see how it would not work.
You may run into troubles if two subvi's are trying to write simultaneously. If so, use semiphores to lock out the action until done.
Or you could use a producer consumer architecture where the producer would queue up the table name and data, and the consumer would write to the database. The producer can be replicated in each subvi. In other words, each subvi will contain its own enqueue code. All subvi's and the consumer loop would have to run in parallel.
- tbob
Inventor of the WORM Global

Trying to access SMB share, can read but not write, I use the domain account to autenticate and domain account has access to the share. its a samba domain and im a Windows Admin by trade.

I have two I Mac's Intel i7 models.
I have some problems getting them to write files to SMB shares.
The domain user account I use when requested to enter when i first try to connect to the share seems to go though without a problem and it presents me with a list of mounts (shares) I select one and the folder opens, I can read files and copy them but I cant write to any of the folders.
I have also mounted the network locatiosn to a folder from the terminal while also specifying a user name and password to use but this also doesnt allow the specified user account to write data to the share.
I have confirmed the user account can write to the share by having the user do so from a windows box.
any help from any of you mac guys would be great!!!!
Im a windows fan boy / Windows Server based Network Administrator and am slowly becomming a fan of your macs (mainly due to the Unix terminal access letting me realise there is more control to be had than most haters would lead you to believe).
Peace Out

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I am connecting an external USB HDD and I can see it on my Apple Macbook Air. BUT this drive is READ only. How can I write to it?

I am connecting an external USB HDD and I can see it on my Apple Macbook Air. BUT this drive is READ only. How can I write to it?

Drive Partition and Format
1.Open Disk Utility in your Utilities folder.
2. After DU loads select your hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Click on the Partition tab in the DU main window.
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4. Select the volume you just created (this is the sub-entry under the drive entry) from the left side list. Click on the Erase tab in the DU main window.
5. Set the format type to Mac OS Extended (Journaled.) Click on the Security button, check the button for Zero Data and click on OK to return to the Erase window.
6. Click on the Erase button. The format process can take up to several hours depending upon the drive size.
Steps 4-6 are optional but should be used on a drive that has never been formatted before, if the format type is not Mac OS Extended, if the partition scheme has been changed, or if a different operating system (not OS X) has been installed on the drive.

Can Read but Can't Write to Database

hi...i'm fairly new to java and have a problem w/ a database program i have written...i'm running windows xp along w/ access xp...the program i wrote works fine on my computer, however, the program is for my brother and on his computer it only reads from the database but can't write to it...unfortunately i packed the program in a jar file so when u run the program no console comes up to display the exceptions...he is running windows 98 (first edition) and doesn't have any version of access on his computer...i figure his odbc driver is out of date or something like that but i wouldn't know where to start to tackle this problem...any help w/ be very much appreciated...thank you...

First, don't cross-post:
http://forum.java.sun.com/thread.jsp?forum=54&thread=440288&tstart=0&trange=15
Submit your question to the forum that best suits its contents. Don't try to increase your chances of getting a response by posting the same question here, there, and everywhere. It's considered rude.
Second, if you've written a Java app that runs fine on XP, then your Java is okay. That's a good start.
I think Windows 98 is the problem. It's rather old technology now. I would say that Windows 9x really isn't an application platform worth thinking about. You might be correct - the ODBC driver might be out of date.
Is the version of Access you're running the same on both machines?

Contacts are there, but can't read anything in it, and can't write either.

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Hi, the problem of deleting files / videos seeds desktop to go into Terminal and then sudo rm-rf ~ /. Trash Pohangina the answers I've had e of someone in her forum but when I write procedures line in Terminal as the Krever my password and it can not writ

Hi, the problem of deleting files / videos seeds desktop to go into Terminal and then sudo rm-rf ~ /. Trash Pohangina the answers I've had e of someone in her forum but when I write procedures line in Terminal as the Krever my password and it can not write anything there, I write but nothing comes and my problem is not löst.När I want to delete the movie / video image Frin desktop still arrive Finder wants to make changes.Type your password to allow this. But even that I type my password file / video is left I need help in an easier way or another set-even those on the terminal that I can not type my password to solve the problem Regards Toni

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How can i write and read the same data

hi,
         i have attached my program to this mail. i have some problems in this program.
problems:
1. I want to select the threshold for the rms,varience and s.d.
But what i used is not doing that. i want to fix the upper threshold value and lower threshold value.
when ever the input crosses upper threshold value i want the output and it will remains uptill the value above the lower threshold value.
Once it come down the lower threshold value the output should be stopped.
2. I want to write this in to a file and i want to read this file. is this possible or not.
            please try to help me i am very new with lab view6i
       REGARDS
CHAMARTHY KOMAL DILEEP.
   [email protected]
Attachments:
dileep.vi ‏93 KB

The easiest way to perform a certain action (such as file I/O) based on a certain condition (such as whether a value has passed a certain threshold) is to use a comparison VI in combination with a case structure. Then you can specify that if your rms, standard deviation and variance are above a threshold then perform a certain action.
Also consider using shift registers to keep track of data from the last loop. If I understand you correctly, you want to start logging data when an upper threshold has been passed. Then you want to continue logging data until a lower threshold is passed. I have attached a non-functional but explanatory VI that will help explain how to implement logic to that effect. It also demonstrates that you can indeed write and read from the same file in a loop. The best way to do this is to open the file before the loop, do all the necessary writing and reading in the loop, and then close the file after the loop.
Hope this helps!
Jarrod S.
National Instruments
Attachments:
dileep_example.vi ‏61 KB

Can't write automation with anything but the mouse on the track

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Hi there!
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Can Read but Can't Write to a Database

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