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• How to properly preload images, js and css files?

  - by Kenny Bones

  Hi, I'm creating a website from scratch and I was really into this in the late 90's but the web has changed alot since then! And I'm more of a designer so when I started putting this site together, I basically did a system of php includes to make the site more "dynamic" When you first visit the site, you'll be presented to a logon screen, if you're not already logged on (cookies). If you're not logged on, a page called access.php is introdused. I thought I'd preload the most heavy images at this point. So that when the user is done logging on, the images are already cached. And this is working as I want. But I still notice that the biggest image still isn't rendered immediatly anyway. So it's seems kinda pointless. All of this has made me rethink how the site is structured and how scripts and css files are loaded. Using FireBug and YSlow with Firefox I see a few pointers like expires headers and reducing the size of each script. But is this really the culprit? For example, would this be really really stupid in the main index.php? The entire site is basically structured like this <?php require("dbconnect.php"); ?> <?php include ("head.php"); ?> And below this is basically just the body and the content of the site. Head.php however consists of the doctype, head portions, linking of two css style sheets, jQuery library, jQuery validation engine, Cufon and Cufon font file, and then the small Cufon.Replace snippet. The rest of the body comes with the index.php file, but at the bottom of this again is an include of a file called "footer.php" which basically consists of loading of a couple of jsLoader scripts and a slidepanel and then a js function. All of this makes the end page source look like a typical complete webpage, but I'm wondering if any of you can see immediatly that "this is really really stupid" and "don't do that, do this instead" etc. :) Are includes a bad way to go? This site is also pretty image intensive and I can probably do a little more optimization. But I don't think that's its the primary culprit. YSlow gives me a report of what takes up the most space: doc(1) - 5.8K js(5) - 198.7K css(2) - 5.6K cssimage(8) - 634.7K image(6) - 110.8K I know it looks like it's cssimage(8) that weighs the most, but I've already preloaded these images from before and it doesn't really affect the rendering.

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• Does Vista prevent changes in Program Files directory?

  - by vfclists

  I have a program developed for Windows XP, but when I try to install it in Windows Vista, I get an error message saying that the SQL database (sqlite3) is read only. Is that due to a feature in Windows Vista?

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• How do you persist a class on PostBack in an ASP.NET 3.5 Web Forms project?

  - by Kyle Noland

  How do I persist an ASP.Net class on PostBack? I've already taken the time to go to the database and fill my object with values when the page loads initially, so how can I save this object in an elegant way on a PostBack? The page that contains the custom object posts back to itself. For what it's worth I'm using C# in an ASP.NET 3.5 Web Forms application.

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• Developing Jquery, jquery ui, php, mysql, ftp, via Dreamweaver?

  - by Derek

  I'm trying to find a good environment to building and maintain an existing website. Would Adobe's Dreamweaver be a good purchase as far as coding in PHP, html, jquery, with a mysql database?

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• asp.net web forms best practice to retrieve dynamic server control values

  - by Andrew Florko

  I populate web form with dynamic list of exams from database. I want user to enter examination marks for each exam. There is list of exam titles and textbox near each title. I create list with repeater control: <asp:Repeater ID="rptExams" runat="server" onitemdatabound="rptExams_ItemDataBound" > <ItemTemplate> <tr> <td> <asp:Literal runat="server" ID="ltTitle"/> </td> <td> <asp:HiddenField runat="server" ID="hfId"/> <asp:Textbox runat="server" ID="tbMark"/> </td> </tr> </ItemTemplate> </asp:Repeater> And bind data to repeater on page_init: class Exam { public int Id { get; set;} public string Title { get; set;} } ... // this list is retrieved from database actually Exam[] Exams = new Exam[] { new Exam { Id = 1, Title = "Math"}, new Exam { Id = 2, Title = "History"} }; ... protected void Page_Init(object sender, EventArgs e) { rptExams.DataSource = Exams; rptExams.DataBind(); } So far so good. Then I have to retrieve data on postback. I have two ways but both of them looks ugly. Idea is to store dynamically created databounded controls on ItemDataBoundEvent in Page_Init stage, and process their values in Page_Load stage. It looks like this: private Dictionary<HiddenField, TextBox> Id2Mark = new Dictionary<HiddenField, TextBox>(); protected void rptExams_ItemDataBound(object sender, RepeaterItemEventArgs e) { ... if (IsPostBack) { var tbMark = (TextBox)e.Item.FindControl("tbMark"); var hfId = (HiddenField)e.Item.FindControl("hfId"); // store dynamically created controls Id2Mark.Add(hfId, tbMark); } ... } protected void Page_Load(object sender, EventArgs e) { if (IsPostBack) { foreach (var pair in Id2Mark) { int examId = Int32.Parse(pair.Key.Value); string mark = pair.Value.Text; // PROCESS } ... I'm completely sure there is a better way to retrieve data from dynamically created controls. Thank you in advance!

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• Treeview with checkBox in windows application

  - by saravanan

  Hi i m novice to .net How do i display node's name when i check the corresponding checkbox in treeview.. becasue i want store the cheked node's name in database.. Plz help me

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• JPA and PostqreSQL: long string persistence

  - by emanemos

  Can anybody tell me how to persist long text using JPA (I use PostgreSQL)? Here's the way I defined a very long string in my class: @Lob private String body; However, this produces a field of type charactervarying(255) in the database. Furthermore, I've tried to use @Column annotation: @Column(columnDefinition="TEXT") private String body; But everything in vain. I would be gratefull for a helpfull comment on this problem.

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• Simplest way to authenticate users across multiple websites/applications in .NET

  - by Schneider

  The ways I can think of are: Use Windows Identity Foundation (WIF). I have never done this so is a black box and risky. Use Forms Authentication or similar, then use database replication to make sure each application has access to the data store. No doubt there are other options.

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• mapping Field with variable type using Hibernate Annotaion

  - by Zahra

  Hi. how can I have a field with variable type in my class? I use hibernate annotation for mapping to DB. I tried to use java.io.Serializable as field's type, but it mapped to database as a 01 amount which is true if I get it's object and cast it to it's true type. but I need to run a query on this objects that needs true amount of field.(right now I can't compare an integer field with a number) Does anyone have any idea how can I do this? Thanks in advance.

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• how to get list of databases that a user owns?

  - by chiggsy

  Id like to find out ( and delete ) all the databases owned by an owner in postgres 8.4.3 I'm new to postgres also, and although I can , and will , read the whole manual today i was forced to use for i in $(psql -l |grep novicedba | awk '{print $1}') psql -d postgres -c " drop database \"$i\"" out of desperation. What's the postgresql way to do this?

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• Connecting CoreData to my App on an iPhone Device

  - by Lauren Quantrell

  I apologize ahead of time for what I'm sure is a complete newbie lapse. Running my iPhone app on iPhone simulator - no problem. But I loaded the app on an iPhone device for the first time and it appears as if the SQLite database I'm using (NSManagedObjectContext) isn't connected or didn't upload. The app installs but with no data. How do I get it all to upload and work on the device? I appreciate any help. lq

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• Can I store and call regex in variables for later use?

  - by adbox

  I plan on storing regular expression codes in a database, but not sure how to get them from variable to function. advise? $i = "([wx])([yz])" $j = "[^A-Za-z0-9]" $k= "([A-Z]{3}|[0-9]{4})" //Wold this execute properly, this really is the extend of my question? preg_match($i, $string);

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• Error when pushing data to Heroku: time zone displacement out of range

  - by J. Pablo Fernández

  I run the following command to push the contents of my local database to Heroku: heroku db:push --app my-app and from my home computer it works flawlessly but from my work computer I get this error: Taps Server Error: PGError: ERROR: time zone displacement out of range: "2011-11-15 12:00:00.000000+5894114400" I'm not sure where that date is coming from, I can't find it in the data anywhere. Any ideas what's going on and/or how to fix it? Thanks.

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• Should I be regularly shrinking my DB or at least my log file?

  - by Tom

  My question is, should I be running one or both of the shrink command regularly, DBCC SHRINKDATABASE OR DBCC SHRINKFILE ============================= background Sql Server: Database is 200 gigs, logs are 150 gigs. running this command SELECT name ,size/128.0 - CAST(FILEPROPERTY(name, 'SpaceUsed') AS int) / 128.0 AS AvailableSpaceInMB FROM sys.database_files;` produces this output.. MyDB: 159.812500 MB free MyDB_Log: 149476.390625 MB free So it seems there is some free space. We backup transaction logs every hour, diff backup 5 nights a week, full backup the other 2 nights of the week.

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• The action or event has been blocked by Disabled Mode

  - by mattruma

  I am using Microsoft Access 2007 to move and massage some data between two SQL Servers. Yesterday everything was working correctly, I was able to run queries, update data, and delete data. Today I opened up the Access database to finish my data migration and am now receiving the following message when I try to run some update queries: The action or event has been blocked by Disabled Mode. Any ideas what this is talking about?

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• how to update an Android ListActivity on changing data of the connected SimpleCursorAdapter

  - by 4485670

  I have the following code. What I want to achieve is to update the shown list when I click an entry so I can traverse through the list. I found the two uncommented ways to do it here on stackoverflow, but neither works. I also got the advice to create a new ListActivity on the data update, but that sounds like wasting resources? EDIT: I found the solution myself. All you need to do is call "SimpleCursorAdapter.changeCursor(new Cursor);". No notifying, no things in UI-Thread or whatever. import android.app.ListActivity; import android.database.Cursor; import android.os.Bundle; import android.util.Log; import android.view.View; import android.widget.ListView; import android.widget.SimpleCursorAdapter; public class MyActivity extends ListActivity { private DepartmentDbAdapter mDbHelper; private Cursor cursor; private String[] from = new String[] { DepartmentDbAdapter.KEY_NAME }; private int[] to = new int[] { R.id.text1 }; private SimpleCursorAdapter notes; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.departments_list); mDbHelper = new DepartmentDbAdapter(this); mDbHelper.open(); // Get all of the departments from the database and create the item list cursor = mDbHelper.fetchSubItemByParentId(1); this.startManagingCursor(cursor); // Now create an array adapter and set it to display using our row notes = new SimpleCursorAdapter(this, R.layout.department_row, cursor, from, to); this.setListAdapter(notes); } @Override protected void onListItemClick(ListView l, View v, int position, long id) { super.onListItemClick(l, v, position, id); // get new data and update the list this.updateData(safeLongToInt(id)); } /** * update data for the list * * @param int departmentId id of the parent department */ private void updateData(int departmentId) { // close the old one, get a new one cursor.close(); cursor = mDbHelper.fetchSubItemByParentId(departmentId); // change the cursor of the adapter to the new one notes.changeCursor(cursor); } /** * safely convert long to in to save memory * * @param long l the long variable * * @return integer */ public static int safeLongToInt(long l) { if (l < Integer.MIN_VALUE || l > Integer.MAX_VALUE) { throw new IllegalArgumentException (l + " cannot be cast to int without changing its value."); } return (int) l; } }

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• Event for "end edit" in a text box

  - by eli.rodriguez

  I am using a textbox in winform (c#) and using the text of to make consults in a database. But i need constantly consult the text of the textbox every time that text change. So for these i use the KeyUp. But this event is too slow. Is any event that just fire when the textbox editing has been finished ?. I consider for finish 2 conditions The control lost focus. The control has 200ms without keypress

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• Create a popup window in Mediawiki

  - by Karthick

  I am customising the mediawiki for our internal portal. I need to open a popup window on clicking a link in the wikitext. This popup would take information from the mysql database and display a movie clip or a document or something. Anyone knows how this can be done?

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• How to make a computed field in a data window object read-only

  - by Archangel

  I hava a data window object, in which I am fetching some attributes from the database to show it to the users. I want to make the computed fields read-only, so that the user can not modify them. How can I make a computed field read-only?

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• Check for type of file system in an MSI package

  - by Hugo

  In my MSI package I need to set user rights to a directory using cacls.exe. It works fine in an NTFS environment but fails when run on a Fat32 file system. Is there a method to determine the type of file system of the drive the software is installed to? I'm using WiX 3 to create my MSI package but any hint pointing to the MSI database would help as well. Many thanks in advance.

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• How can I return a whole mysql result set, and one at a time set each row as an array?

  - by RichardHarrington

  foreach($scraperSites as $site) { //$scraperWriter->addSite( new ScraperSite($site) ); print_r($site); } scraperSites is the array of all sites from the mySQL database; I'm trying to keep $site as an array, (but only with one row worth of data), add it to an object, then move on to the next row.

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• .net: does anyone know a free library to download nntp messages

  - by stighy

  hi folks, i'm using ip*works for download newsgroup message and insert them into a database... ipworks is "comfortable" to use because it automatically split nntp data return into different object (or variable). So i've "author" "date" "topic" "messagge" already splitted to my use. However ipworks isn't free and it cost a lot for my use.. so i'm asking you some component or code snippet to use to download and "manage" nntp messagges. Thanks in advance and regards!

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• how to display fixed dropdown in django admin?

  - by FurtiveFelon

  Hi all, I would like to display priority information in a drop down. Currently i am using a integer field to store the priority, but i would like to display high/medium/low instead of letting user type in a priority. A way to approximate this is to use a Priority database which stores 3 elements, 1:high, 2:medium, 3:low, but it seems like an overkill. Any easier way would be much appreciated! Jason

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• In php, Prepare string and create XML/RSS Feed

  - by Bill

  I want to create my own RSS/XML feed. I fetch data from the database to display, but keep getting invalid character errors. If the string has an ampersand or other strange characters in it, the XML will be invalid. I tried using urlencode and htmlentities, but these don't capture all possible characters which need to be escaped. Does anyone know of a PHP function which will prepare a string for XML output?

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• Entity Framework with XML Files

  - by Tim

  Can someone point me to a good tutorial explaining the Entity Framework using an XML file instead of a database? I have seen some good tutorials with SQL databases, but I can't make the leap to an XML file. Thanks!

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