Akdora's Blog

Solution Your profile could not be opened correctly in Chrome

Akdora — Thu, 03 Nov 2011 08:46:25 +0000

Hi,
When you try to open your chrome web explorer, if you get “Your profile could not be opened correctly” error, try to following solution:
There are several solutions on the web for this, but this is the easiest way:

-Close Chrome
-Go to “C:\Users\[user]\AppData\Local\Google\Chrome\User Data”
-Delete “Web Data” and “Web Data-journal” files. (If you cannot delete it, restart computer)
-Open Chrome

Clear extJS combo value when text is cleared or doesn’t match

Akdora — Tue, 11 Oct 2011 12:58:27 +0000

Here is the scenario;
-Type something to combobox
-Select something on the list
-Search and fill gridPanel
-Clear combobox and then search again
-It fills gridPanel with value that before we cleared.
I this this is a bug.
If you use Ext.getCmp(‘myCombo’).getValue() or Ext.getCmp(‘myCombo’).lastSelectionText, it does not work.
You have to use Ext.getCmp(‘myCombo’).getRawValue(). This works
By the way comboBox is not readonly.

Java Debug Problem “Source not found.”

Akdora — Mon, 23 May 2011 06:10:30 +0000

Quick Hint:
When you try to debug java code in eclipse, if you get “Source not found.” error with red letters. Here is the solution:
Down Arrow Icon Next to Debug Icon > Debug Configurations > Classpath Tab > Add Projects to User Entries
Add your project that cannot debug to this location.

HTML Image Saving Protection (Save Image As >> Point.gif)

Akdora — Fri, 15 Apr 2011 11:04:11 +0000

If you have a web page with full of your copyrighted photos and do not want to visitors to save images in (easy way!) to their local computers. Let me show a trick about it.

In the photo (img) section of the page, we have always something like as following;

On the image, when we right-click to the mouse and click to “Save Image As” command, we can save the image to our local disk. However, if we create a basic css style with a div below of the image, we can prevent this.

The important thing is in here: blank/point image’s dimensions has to be same with original image dimensions and css class of the component should include the following properties.

.BlankPixel { 
     position: absolute; 
     top: 0;
     left: 0; 
}

That’s it. This trick is an only basic measure for basic internet users. If someone want to save the photo, since the resource is downloaded to your computer to show up on the screen. It can be saved in any way.

Here is the full html example:
Copy the code and create a html page called “a.html” and open it. Try to save Google logo and see what happens A file dialog box will ask you a location to save “http://akdora.files.wordpress.com/2011/04/point.gif” file! Not Google Logo!



  
    My Title

C#.Net Download and Merge Images into One Bitmap Image

Akdora — Tue, 05 Apr 2011 19:10:16 +0000

Recently, I developed a program that reads imdb.com web page for a specific movie and downloads movie info and images. Then, it merges the thumbnails images into one image file.

Firstly, I write the main code, that downloads the image files and merges them and save the merged image to system.

Note 1: In the code, arr variable is an ArrayList holds the picture urls.

Note 2: Image class is in “System.Drawing”


                                        Image[] images = new Image[arr.Length];
                                        for (int k = 0; k < arr.Length; k++){
                                             images[k] = Utils.DownloadImage(arr[k]);
                                        }
                                        Image mergedImage = Utils.MergeImages(images);
                                        if (mergedImage != null)
                                        {
                                             mergedImage.Save(fileFolder + "\\" + movieTitle + " Thumbnails.jpg");
                                        }

Here is inside of DownloadImage function:

        /// 
        /// Function to download Image from website
        /// 
        /// URL address to download image
        /// Image
        public static Image DownloadImage(string _URL)
        {
            Image _tmpImage = null;

            try
            {
                // Open a connection
                System.Net.HttpWebRequest _HttpWebRequest = (System.Net.HttpWebRequest)System.Net.HttpWebRequest.Create(_URL);

                _HttpWebRequest.AllowWriteStreamBuffering = true;

                // set timeout for 20 seconds (Optional)
                _HttpWebRequest.Timeout = 20000;

                // Request response:
                System.Net.WebResponse _WebResponse = _HttpWebRequest.GetResponse();

                // Open data stream:
                System.IO.Stream _WebStream = _WebResponse.GetResponseStream();

                // convert webstream to image
                _tmpImage = Image.FromStream(_WebStream);

                // Cleanup
                _WebResponse.Close();
            }
            catch (Exception _Exception)
            {
                // Error
                Console.WriteLine("Exception caught in process: {0}", _Exception.ToString());
                return null;
            }

            return _tmpImage;
        }

Here is inside of MergeImages function:

        /// 
        /// Merges Images into 1 Image.
        /// 
        /// The Images you want merge
        /// An Image of all images
        public static Image MergeImages(Image[] images)
        {
            if (images == null || images.Length <= 0)
            {
                return null;
            }
            Int32 imageWSize = 0;
            Int32 imageHSize = 0;

            for(int i=0;i imageWSize)
                    imageWSize = images[i].Width;

                if (images[i].Height > imageHSize)
                    imageHSize = images[i].Height;
            }

            Int32 width = 0;
            Int32 height = 0;
            int picsInOneLine = 10;

            if (images.Length >= picsInOneLine)
            {
                width = picsInOneLine * imageWSize;
                decimal d = (images.Length + picsInOneLine) / picsInOneLine;
                height = (int)Math.Round(d) * imageHSize;
            }else{
                width = images.Length * imageWSize;
                height = imageHSize;
            }

            Bitmap bitmap = new Bitmap(width, height);
            int hhh = -1;
            int www = 0;
            for(int i=0; i

PL/SQL Developer User Preferences (Windows 7)

Akdora — Wed, 30 Mar 2011 06:56:04 +0000

If you changed your computer and want “your PL/SQL developer login history and preferences” as well in your new computer. Copy the following folder to your new computer in the same path format!

C:\Users\[username]\AppData\Roaming\PLSQL Developer

If you need only the login history, open the following file:

C:\Users\[username]\AppData\Roaming\PLSQL Developer\Preferences\[username]\user.prefs

In the file, copy [LogonHistory] part to your new user.prefs file. It’s encrypted but it does not matter. PL/SQL Developer will dencrypt it

I need this, because I deal with a lots of database with a lots of schema.. It is really hard to remember the passwords sometimes, so i let the PL/Developer to remember them (Preferences > Login History > Store with Password)

ORA-14047: ALTER TABLE|INDEX RENAME may not be combined with other operations

Akdora — Mon, 21 Mar 2011 09:40:28 +0000

When we try to rename table or index name in Oracle, we use a simple command as following;

alter table [prev_table_name] rename to [last_table_name]

If we put into schema names to this command, we can deal with ORA-14047 error. This error raise when we put schema name in front of the last_table_name.

alter table hr.[prev_table_name] rename to hr.[last_table_name] >>> RAISES ORA-14047 ERROR
alter table hr.[prev_table_name] rename to [last_table_name] >> CORRECT ONE

It is same with Index renaming.

How to remove spaces in a string in Shell

Akdora — Tue, 08 Mar 2011 09:45:36 +0000

I experienced that when you connect to Oracle database from shell and get some data from the table, if the length of the column value is more than 80 letters. Shell puts space in every 80th letter automaticly. I do not know why, but it is really interesting. I counted the number 80 for my environment. It may differ in different systems.

Anyway, I need to remove that interesting spaces. So here is a script to do this.

RETVAL=`echo $RETVAL | sed 's/ //g'`

We use the SED command. Its use like ‘s/[seach_letter]/[replacement]/g’. In my example [seach_letter] is ” ” space and [replacement] is nothing. For example; If we want to replace ” ” (space) characters with “_” (underscore) character. Here is how we do this:

RETVAL=`echo $RETVAL | sed 's/ /_/g'`

I wrote this quick entry, because if you do not remember how to do something like this and want to google it. It is not easy to find sometimes

Calling SQL and PL/SQL codes from Shell

Akdora — Sun, 06 Mar 2011 11:24:18 +0000

#################################################################################
#!/bin/ksh
##################################################################################
# Filename: test.sh
# Name    : Özay Akdora (http://akdora.wordpress.com)
# Date		: 04.03.2011
# Purpose : Oracle - Shell Integration (SQL Operations & PL/SQL Execution )
# Env			: This example is uses Oracle 11G with "/export/home/oracle/app/product/11.2c" path and korn shell script

# First of all we need to define some variable to access Oracle Database
export ORACLE_HOME=/export/home/oracle/app/product/11.2c
export LD_LIBRARY_PATH=/export/home/oracle/app/product/11.2c/lib
export PATH=/usr/local/bin:/usr/local/sbin:/usr/bin:/export/home/oracle/app/product/11.2c/bin:/export/home/ubtool/ubSQL_5.0.1:

# Then, we need to define username/password (@ optional another database TNS definition).
export db_connection_url=scott/tiger@MYDB
# I needed to connect to another database to query a table that has my configuration data.
# Your shell code may locate in an another machine that you want to connect.
# Anyway, You have to define TNS info of MYDB database to /export/home/oracle/app/product/11.2c/network/admin/tnsnames.ora

# You have to give permission to execute this file. For example : chmod 777 test.sh
# You also have to give permission, if you put this file to a folder that you created new.

# Run as : "./test.sh"

#######################################################################
# Let's see what we got here;
# Example 1: Access db and query SYSDATE:

echo "########## Example 1: SYSDATE ############"
RETVAL=`sqlplus -s $db_connection_url < 'akdora_test',
#									  PROGRAM_TYPE        => 'EXECUTABLE',
#									  PROGRAM_ACTION      => '/export/home/bonjovi/ozay/test.sh',
#									  NUMBER_OF_ARGUMENTS => 0,
#									  ENABLED             => TRUE,
#									  COMMENTS            => 'Fantasy Program');
#	END;
#	/
#
#
#
# I hope this entry is helpful for you.
# Cheers

How to write to a path, make a FTP operation, send E-mail a SQL query result in Excel file via PL/SQL

Akdora — Sat, 05 Mar 2011 22:08:35 +0000

After I read some blog entries about exporting Excel files via PL/SQL recently, I also decided to share my Excel API code in PL/SQL. I wrote a similar article before . This API has following features;

Most of the interface procedures accepts SQL query as parameter:

Creates an excel file content as CLOB variable (PRC_CREATE_EXCEL_BY_QUERY)
Writes any CLOB data to a specific folder that defined before with a filename. (PRC_WRITE_EXCEL_BY_MANUAL)
Writes any SQL query to a specific folder that defined before (PRC_WRITE_EXCEL_BY_QUERY)
Sends e-mail any CLOB data as attachment with TO, CC, BCC features and with also some specific words with spaces in sender name like “John Smith Company”. (PRC_EMAIL_EXCEL_BY_MANUAL)
Sends e-mail with SQL query result in Excel file as attachment (PRC_EMAIL_EXCEL_BY_QUERY)
Writes any CLOB data to a FTP path as file. (PRC_FTP_EXCEL_BY_MANUAL)
Writes SQL query result in Excel file to a FTP path. (PRC_FTP_EXCEL_BY_QUERY)
Downloads SQL query result in Excel file from APEX application using WPG_DOCLOAD package. (PRC_DOWNL_EXCEL_FILE)
You can also create dynamic Excel file content in CLOB variable. For example;

DECLARE MYEXCELCONTENT CLOB; BEGIN -- Test statements here PK_EXCEL_API.G_SHOW_BORDER := 'Y'; PK_EXCEL_API.EX_EXCEL_OPEN(MYEXCELCONTENT); PK_EXCEL_API.EX_WORKSHEET_OPEN(MYEXCELCONTENT, 'test');

PK_EXCEL_API.EX_ROW_OPEN(MYEXCELCONTENT); PK_EXCEL_API.EX_CELL_WRITE(MYEXCELCONTENT, 'asdasdasd'); PK_EXCEL_API.EX_ROW_CLOSE(MYEXCELCONTENT);

PK_EXCEL_API.EX_ROW_OPEN(MYEXCELCONTENT); PK_EXCEL_API.EX_CELL_WRITE(MYEXCELCONTENT, 'INVOICE NUMBER'); PK_EXCEL_API.EX_CELL_WRITE(MYEXCELCONTENT, 'SEQ NO'); PK_EXCEL_API.EX_CELL_WRITE(MYEXCELCONTENT, 'VERSION..'); PK_EXCEL_API.EX_CELL_WRITE(MYEXCELCONTENT, 'BLA BLA BLA'); PK_EXCEL_API.EX_ROW_CLOSE(MYEXCELCONTENT);

PK_EXCEL_API.EX_WORKSHEET_CLOSE(MYEXCELCONTENT); PK_EXCEL_API.EX_EXCEL_CLOSE(MYEXCELCONTENT); PK_EXCEL_API.PRC_WRITE_EXCEL_FILE(P_CLOB => MYEXCELCONTENT, P_FILENAME => 'test.xls', P_DIR => 'UTL_FILE_DIR'); END;

Here is the all package here: PK_EXCEL_API_v1.0

(Note:Since I could not upload directly txt files to wordpress, I put the code into a odt file and uploaded here)